MAX17016ETL+T ,Single Quick-PWM Step-Down Controller with Internal 26V MOSFETsapplications that need lower current-limit • Thermal Compensation with NTCsettings to avoid overdes ..
MAX17017GTM+ ,Quad-Output Controller for Low-Power ArchitectureApplicationsONA 39 22 AGND1-to-4 Li+ Cell Battery-Powered Devices INBC 40 21 REFINBC 41 20 FREQLow- ..
MAX17017GTM+T ,Quad-Output Controller for Low-Power ArchitectureELECTRICAL CHARACTERISTICS(Circuit of Figure 1 (step-down), V = 12V, V = V = V = V = V = V = V = 5V ..
MAX1701EEE ,1-Cell to 3-Cell / High-Power 1A / Low-Noise / Step-Up DC-DC ConvertersFeaturesThe MAX1700/MAX1701 are high-efficiency, low-noise,' Up to 96% Efficiencystep-up DC-DC conv ..
MAX1701EEE ,1-Cell to 3-Cell / High-Power 1A / Low-Noise / Step-Up DC-DC ConvertersELECTRICAL CHARACTERISTICS(CLK/SEL = ONA = ONB = FB = PGND = GND, OUT = POUT, V = 3.6V (Note 6); MA ..
MAX1701EEE ,1-Cell to 3-Cell / High-Power 1A / Low-Noise / Step-Up DC-DC ConvertersApplicationsDigital Cordless Phones Personal CommunicatorsINPUTPCS Phones Palmtop Computers0.7V TO ..
MAX4517EUK+T ,Dual-Supply, Low On-Resistance, SPST, CMOS Analog SwitchesApplications ♦ Fast Switching Speed: t = 100ns, t = 75nsON OFFBattery-Operated Equipment ♦ t > t a ..
MAX4518CEE ,Precision, 4-Channel/Dual 2-Channel, Low-Voltage, CMOS Analog MultiplexersELECTRICAL CHARACTERISTICS—Dual Supplies(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, GND = 0V, V = V ..
MAX4518CEE ,Precision, 4-Channel/Dual 2-Channel, Low-Voltage, CMOS Analog MultiplexersMAX4518/MAX451919-1070; Rev. 1; 5/98Precision, 4-Channel/Dual 2-Channel,Low-Voltage, CMOS Analog Mu ..
MAX4518CEE+ ,Precision, 4-Channel/Dual 2-Channel, Low-Voltage, CMOS Analog MultiplexersFeaturesThe MAX4518/MAX4519 precision, monolithic, CMOS♦ Guaranteed On-Resistance Match analog mult ..
MAX4518CPD ,Precision, 4-Channel/Dual 2-Channel, Low-Voltage, CMOS Analog MultiplexersGeneral Description ________
MAX4518CPD+ ,Precision, 4-Channel/Dual 2-Channel, Low-Voltage, CMOS Analog MultiplexersApplicationsPART TEMP. RANGE PIN-PACKAGE MAX4518CPD 0°C to +70°C 14 Plastic DIPSample-and-Hold Circ ..
MAX17016ETL+-MAX17016ETL+T
Single Quick-PWM Step-Down Controller with Internal 26V MOSFETs
General DescriptionThe MAX17016 pulse-width-modulation (PWM) controller
provides high efficiency, excellent transient response, and
high DC-output accuracy needed for stepping down high-
voltage batteries to generate low-voltage core or chipset/
RAM bias supplies in notebook computers. Combined with low on-resistance MOSFETs (6mΩ low-side MOSFET and 12mΩ high-side MOSFET), the MAX17016 provides
a highly efficient and compact solution for small form fac-
tor applications that need a high-power density.
Maxim’s proprietary Quick-PWM™ quick-response, con-
stant-on-time PWM control scheme handles wide input/
output voltage ratios (low-duty-cycle applications) with
ease and provides 100ns “instant-on” response to load
transients while maintaining a relatively constant switch-
ing frequency. The output voltage can be dynamically
controlled using the dynamic REFIN, which supports
input voltages between 0 to 2V. The REFIN adjustability
combined with a resistive voltage-divider on the feedback
input allows the MAX17016 to be configured for any out-
put voltage between 0 to 0.9VIN.
The controller senses the current across the 6mΩ syn-
chronous rectifier to achieve a low-cost and highly effi-
cient valley current-limit protection. External current-limit
control is still provided to allow higher current-limit set-
tings for applications with heatsinks and air flow, or for
lower current applications that need lower current-limit
settings to avoid overdesigning the application circuit. The
adjustable current limit provides a high degree of flexibil-
ity, allowing thermally compensated protection or foldback
current-limit protection using a voltage-divider partially
derived from the output.
The MAX17016 includes a voltage-controlled soft-start
and soft-shutdown in order to limit the input surge
current, provide a monotonic power-up (even into a
precharged output), and provide a predictable power-
up time. The controller also includes output fault protec-
tion—undervoltage and overvoltage protection—as well
as thermal-fault protection.
The MAX17016 is available in a small 40-pin, 6mm x
6mm, 2W TQFN package.
Applications●Notebook Computers●I/O and Chipset Supplies●GPU Core Supply●DDR Memory—VDDQ or VTT●Point-of-Load Applications●Step-Down Power Supply
Features●Quick-PWM with Fast Transient Response●6mΩ, 26V Low-Side MOSFET●12mΩ, 26V High-Side MOSFET●Supports Any Output CapacitorNo Compensation Required with
Polymers/TantalumStable with Ceramic Output Capacitors Using
External Compensation●Precision 2V ±10mV Reference●Dynamically Adjustable Output Voltage
(0 to 0.9 VIN Range)Feedback Input Regulates from 0 to 2V REFIN
Voltage0.5% VOUT Accuracy Over Line and Load●26V Maximum Input Voltage Rating●Adjustable Valley Current-Limit ProtectionThermal Compensation with NTCSupports Foldback Current Limit●Resistively Programmable Switching Frequency●Overvoltage Protection●Undervoltage/Thermal Protection●Voltage Soft-Start and Soft-Shutdown●Monotonic Power-Up with Precharged Output●Power-Good Window Comparator
Quick-PWM is a trademark of Maxim Integrated Products, Inc.
Ordering Information appears at end of data sheet.
MAX17016Single Quick-PWM Step-Down
Controller with Internal 26V MOSFETs
EVALUATION KIT AVAILABLE
IN to PGND ...........................................................-0.3V to +28V
TON to AGND ........................................................-0.3V to +28V
VDD to AGND ..........................................................-0.3V to +6V
VCC to AGND ...........................................-0.3V to (VDD + 0.3V)
EN, SKIP, PGOOD to AGND ..................................-0.3V to +6V
REF, REFIN to AGND ..............................-0.3V to (VCC + 0.3V)
ILIM, FB to AGND ....................................-0.3V to (VCC + 0.3V)
GND to PGND ......................................................-0.3V to +0.3V
LX to PGND..............................................................-1V to +28V
BST to PGND ............................................(VDD - 0.3V) to +34V
BST to LX ................................................................-0.3V to +6V
BST to VDD ...........................................................-0.3V to +28V
REF Short Circuit to AGND .......................................Continuous
IN RMS Current Rating (continuous) ....................................15A
PGND RMS Current Rating (continuous)..............................20A
Continuous Power Dissipation (TA = +70°C)40-Pin, 6mm x 6mm TQFN (T4066-MCM)(derated 27mW/°C above +70°C) .............................2162mW
Operating Temperature Range (extended) ........-40°C to +85°C
Junction Temperature Range ..........................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
(Circuit of Figure 1, VIN = 12V, VDD = VCC = VEN = 5V, REFIN = ILIM = REF, SKIP = GND. TA = 0°C to +85°C, unless otherwise
specified. Typical values are at TA = +25°C.) (Note 1)
Absolute Maximum RatingsStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Electrical Characteristics
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
PWM CONTROLLERInput Voltage RangeVIN226V
Quiescent Supply Current (VDD)IDD + ICCFB forced above REFIN0.71.2mA
Shutdown Supply Current (VDD)ISHDNEN = GND, TA = +25°C0.12µA
VDD-to-VCC ResistanceRCC20Ω
On-Time tON
VIN = 12V,
VFB = 1.0V
(Note 2)
RTON = 97.5kΩ (600kHz)123164205RTON = 200kΩ (300kHz)275303331
RTON = 302.5kΩ (200kHz)379442505
Minimum Off-Time tOFF(MIN)(Note 2)225350ns
TON Shutdown Supply CurrentEN = GND, VTON = 26V,
VCC = 0V or 5V, TA = +25°C0.011µA
REFIN Voltage RangeVREFIN(Note 3)0VREFV
REFIN Input CurrentIREFINTA = +25°C, REFIN = 0.5V to 2V-50+50mA
FB Voltage RangeVFB(Note 3)0VREFV
FB Voltage AccuracyVFB
VREFIN = 0.5V,
measured at FB,
VIN = 2V to 26V,
SKIP = VDD
TA = +25°C0.4950.50.505
TA = 0°C to +85°C0.4930.507
VREFIN = 1.0VTA = +25°C0.9951.01.005
TA = 0°C to +85°C0.9931.007
VREFIN = 2.0VTA = 0°C to +85°C1.9902.02.010
FB Input Bias CurrentIFBVFB = 0.5V to 2.0V, TA = +25°C-0.1+0.1µA
FB Output Low VoltageISINK = 3mA0.4V
Load-Regulation ErrorSKIP = VDD, ILOAD = 0.1A to 10A0.1%
Line-Regulation ErrorVCC = 4.5V to 5.5V, VIN = 2V to 26V0.2%
MAX17016Single Quick-PWM Step-Down
Controller with Internal 26V MOSFETs
(Circuit of Figure 1, VIN = 12V, VDD = VCC = VEN = 5V, REFIN = ILIM = REF, SKIP = GND. TA = 0°C to +85°C, unless otherwise
specified. Typical values are at TA = +25°C.) (Note 1)
Electrical Characteristics (continued)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
REFERENCEReference VoltageVREFVCC = 4.5V
to 5.5V
No load1.9902.002.010V
IREF = -10µA to +50µA1.982.02
FAULT DETECTIONOutput Overvoltage-Protection
Trip ThresholdOVP
With respect to the internal target voltage
(error comparator threshold); rising edge;
hysteresis = 50mV
250300350mV
Dynamic transitionVREF + 0.30V
Minimum OVP threshold0.7
Output Overvoltage
Fault-Propagation DelaytOVPFB forced 25mV above trip threshold5µs
Output Undervoltage-Protection
Trip ThresholdUVP
With respect to the internal target voltage
(error comparator threshold) falling edge;
hysteresis = 50mV
-240-200-160mV
Output Undervoltage
Fault-Propagation DelaytUVPFB forced 25mV below trip threshold100200350µs
PGOOD Propagation DelaytPGOOD
UVP falling edge, 25mV overdrive5OVP rising edge, 25mV overdrive5
Startup delay100200350
PGOOD Output-Low VoltageISINK = 3mA0.4V
PGOOD Leakage CurrentIPGOODFB = REFIN (PGOOD high impedance),
PGOOD forced to 5V, TA = +25°C1µA
Dynamic REFIN Transition Fault-
Blanking Threshold
Fault blanking initiated; REFIN deviation from
the internal target voltage (error comparator
threshold); hysteresis = 10mV
±50mV
Thermal-Shutdown ThresholdTSHDNHysteresis = 15°C160°C
VCC Undervoltage Lockout
ThresholdVUVLO(VCC)Rising edge, PWM disabled below this level;
hysteresis = 100mV3.954.24.45V
CURRENT LIMITILIM Input Range0.4VREFV
ILIM Input Bias CurrentTA = +25°C, ILIM = 0.4V to 2V-0.1+0.1µA
Current-Limit Threshold VILIMIT
VILIM = 0.4V, VGND - VLX182022
ILIM = REF (2.0V), VGND - VLX92100108
Current-Limit Threshold
(Negative)VINEGVILIM = 0.4V, VGND - VLX-24mV
Current-Limit Threshold
(Zero Crossing)VZXVILIM = 0.4V,
VGND - VLX, SKIP = GND or open1mV
Ultrasonic FrequencySKIP = open (3.3V); VFB = VREFIN + 50mV1830kHz
MAX17016Single Quick-PWM Step-Down
Controller with Internal 26V MOSFETs
(Circuit of Figure 1, VIN = 12V, VDD = VCC = VEN = 5V, REFIN = ILIM = REF, SKIP = GND. TA = 0°C to +85°C, unless otherwise
specified. Typical values are at TA = +25°C.) (Note 1)
(Circuit of Figure 1, VIN = 12V, VDD = VCC = VEN = 5V, REFIN = ILIM = REF, SKIP = GND. TA = -40°C to +85°C, unless otherwise
specified.) (Note 1)
Electrical Characteristics (continued)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
POWER MOSFETsLow-Side MOSFET
On-Resistance
Low-side MOSFET
enabled; VDD = 5V,
VFB = VREFIN + 50mV
TA = +25°C67.5mΩ
TA = +85°C67.5
High-Side MOSFET
On-Resistance
High-side MOSFET enabled, VDD = 5V,
TA = +25°C10mΩ
IBST = 10mA, VDD = 5V1216mΩ
Internal BST Switch
On-ResistanceRBSTIBST = 10mA, VDD = 5V47Ω
INPUTS AND OUTPUTSEN Logic-Input ThresholdVENEN rising edge, hysteresis = 450mV (typ)1.201.72.20V
EN Logic-Input CurrentIENEN forced to GND or VDD, TA = +25°C -0.5+0.5µA
SKIP Quad-Level Input
Logic LevelsVSKIP
High (5V VDD)VCC - 0.4Open (3.3V)3.03.6
Ref (2.0V)1.72.3
Low (GND)0.4
SKIP Logic-Input CurrentISKIPSKIP forced to GND or VDD, TA = +25°C-2+2µA
Electrical Characteristics
PARAMETERSYMBOLCONDITIONSMINMAXUNITS
PWM CONTROLLERInput Voltage RangeVIN226V
Quiescent Supply Current (VDD)IDD + ICCFB forced above REFIN1.2mA
On-Time tON
VIN = 12V,
VFB = 1.0V
(Note 2)
RTON = 97.5kΩ (600kHz)115213RTON = 200kΩ (300kHz)270336
RTON = 302.5kΩ (200kHz)368516
Minimum Off-Time tOFF(MIN)(Note 2)400ns
REFIN Voltage RangeVREFIN(Note 3)0VREFV
FB Voltage RangeVFB(Note 3)0VREFV
FB Voltage AccuracyVFB
Measured at FB,
VIN = 2V to 26V,
SKIP = VDD
VREFIN = 0.5V0.490.51VREFIN = 1.0V0.991.01
VREFIN = 2.0V1.9852.015
MAX17016Single Quick-PWM Step-Down
Controller with Internal 26V MOSFETs
(Circuit of Figure 1, VIN = 12V, VDD = VCC = VEN = 5V, REFIN = ILIM = REF, SKIP = GND. TA = -40°C to +85°C, unless otherwise
specified.) (Note 1)
Note 1: Limits are 100% production tested at TA = +25°C. Maximum and minimum limits over temperature are guaranteed by design and characterization.
Note 2: On-time and off-time specifications are measured from the 50% point to the 50% point at the unloaded LX node. The typi-
cal 25ns dead time that occurs between the high-side driver falling edge (high-side MOSFET turn-off) and the low-side
MOSFET turn-on) is included in the on-time measurement. Similarly, the typical 25ns dead time that occurs between the
low-side driver falling edge (low-side MOSFET turn-off) and the high-side driver rising edge (high-side MOSFET turn-on) is
included in the off-time measurement.
Note 3: The 0 to 0.5V range is guaranteed by design, not production tested.
Electrical Characteristics (continued)
PARAMETERSYMBOLCONDITIONSMINMAXUNITS
REFERENCEReference VoltageVREFVDD = 4.5V to 5.5V1.9852.015V
FAULT DETECTIONOutput Overvoltage-Protection
Trip ThresholdOVP
With respect to the internal target voltage
(error comparator threshold) rising edge;
hysteresis = 50mV
250350mV
Output Undervoltage-Protection
Trip ThresholdUVP
With respect to the internal target voltage
(error comparator threshold);
falling edge; hysteresis = 50mV
-240-160mV
Output Undervoltage
Fault-Propagation DelaytUVPFB forced 25mV below trip threshold80400µs
PGOOD Output-Low VoltageISINK = 3mA0.4V
VCC Undervoltage Lockout
ThresholdVUVLO(VCC)Rising edge, PWM disabled below this level,
hysteresis = 100mV3.954.45V
CURRENT LIMITILIM Input Range0.4VREFV
Current-Limit Threshold VILIMIT
VILIM = 0.4V, VGND = VLX1723
ILIM = REF (2.0V), VGND = VLX90110
Ultrasonic FrequencySKIP = open (3.3V), VFB = VREFIN + 50mV17kHz
INPUTS AND OUTPUTSEN Logic-Input ThresholdVENEN rising edge hysteresis = 450mV (typ)1.202.20V
SKIP Quad-Level Input
Logic LevelsVSKIP
High (5V VDD)VCC - 0.4
Mid (3.3V)3.03.6
Ref (2.0V)1.72.3
Low (GND)0.4
MAX17016Single Quick-PWM Step-Down
Controller with Internal 26V MOSFETs
(MAX17016 Circuit of Figure 1, VIN = 12V, VDD = 5V, SKIP = GND, RTON = 200kΩ, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics
1.5V OUTPUT EFFICIENCY
vs. LOAD CURRENTMAX17016 toc01
LOAD CURRENT (A)
EFFICIENCY (%)0.1
20V
SKIP MODE
PWM MODE
12V
1.05V OUTPUT EFFICIENCY
vs. LOAD CURRENTMAX17016 toc04
LOAD CURRENT (A)
EFFICIENCY (%)0.1
20V
SKIP MODE
PWM MODE
12V
SWITCHING FREQUENCY
vs. LOAD CURRENTMAX17016 toc07
LOAD CURRENT (A)
SWITCHING FREQUENCY (kHz)0.1
SKIP MODEULTRASONIC
MODE
PWM MODE
1.5V OUTPUT EFFICIENCY
vs. LOAD CURRENTMAX17016 toc02
LOAD CURRENT (A)
EFFICIENCY (%)0.1
SKIP MODE
PWM MODE
ULTRASONIC
MODE
1.05V OUTPUT EFFICIENCY
vs. LOAD CURRENTMAX17016 toc05
LOAD CURRENT (A)
EFFICIENCY (%)0.1
SKIP MODE
PWM MODE
ULTRASONIC
MODE
PWM MODE SWITCHING FREQUENCY
vs. INPUT VOLTAGEMAX17016 toc08
INPUT VOLTAGE (V)
SWITCHING FREQUENCY (kHz)1810
ILOAD = 5A
NO LOAD
1.5V OUTPUT VOLTAGE
vs. LOAD CURRENTMAX17016 toc03
LOAD CURRENT (A)
OUTPUT VOLTAGE (V)682
SKIP MODE
PWM MODE
ULTRASONIC
MODE
1.05V OUTPUT VOLTAGE
vs. LOAD CURRENTMAX17016 toc06
LOAD CURRENT (A)
OUTPUT VOLTAGE (V)682
SKIP MODE
PWM MODE
ULTRASONIC
MODE
SWITCHING FREQUENCY
vs. TEMPERATUREMAX17016 toc09
TEMPERATURE (°C)
SWITCHING FREQUENCY (kHz)406080-200
ILOAD = 10A
ILOAD = 5A
MAX17016Single Quick-PWM Step-Down
Controller with Internal 26V MOSFETs
(MAX17016 Circuit of Figure 1, VIN = 12V, VDD = 5V, SKIP = GND, RTON = 200kΩ, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGEMAX17016 toc10
INPUT VOLTAGE (V)
MAXIMUM OUTPUT CURRENT (A)1821912
NO-LOAD SUPPLY CURRENT (IIN)
vs. INPUT VOLTAGE
MAX17016 toc13
INPUT VOLTAGE (V)
IIN
(mA)1214161820228
SKIP MODE
PWM MODE
ULTRASONIC MODE
MAXIMUM OUTPUT CURRENT
vs. TEMPERATUREMAX17016 toc11
TEMPERATURE (°C)
MAXIMUM OUTPUT CURRENT (A)406080100-200
REF OUTPUT VOLTAGE
vs. LOAD CURRENT
MAX17016 toc14
LOAD CURRENT (µA)
REF OUTPUT VOLTAGE (V)2030400
NO-LOAD SUPPLY CURRENT (IBIAS)
vs. INPUT VOLTAGE
MAX17016 toc12
INPUT VOLTAGE (V)
IBIAS
(mA)121416182022824
SKIP MODE
PWM MODE
ULTRASONIC MODE
SOFT-START WAVEFORM
(HEAVY LOAD)MAX17016 toc15
200µs/div
C. VOUT, 1V/div
B. INDUCTOR CURRENT,
10A/div
1.5V5VA
A. EN, 5V/div
B. PGOOD, 5V/div
IOUT = 8A
MAX17016Single Quick-PWM Step-Down
Controller with Internal 26V MOSFETs
(MAX17016 Circuit of Figure 1, VIN = 12V, VDD = 5V, SKIP = GND, RTON = 200kΩ, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
SOFT-START WAVEFORM
(LIGHT LOAD)MAX17016 toc16
200µs/div
C. VOUT, 1V/div
B. INDUCTOR CURRENT,
10A/div
1.5VA
A. EN, 5V/div
B. PGOOD, 5V/div
IOUT = 1A
LOAD-TRANSIENT RESPONSE
(SKIP MODE)MAX17016 toc19
20µs/div
B. VOUT, 20mV/div
C. INDUCTOR CURRENT,
5A/div
1.5V
A. IOUT, 10A/div
IOUT = 1A TO 8A TO 1A
SHUTDOWN WAVEFORMMAX17016 toc17
200µs/div
C. VOUT, 1V/div
D. INDUCTOR CURRENT,
5A/div
1.5VA
A. EN, 5V/div
B. PGOOD, 5V/div
IOUT = 6A
OUTPUT OVERLOAD WAVEFORMMAX17016 toc20
200µs/div
B. VOUT, 1V/div
C. PGOOD, 5V/div
20A
1.5V
A. INDUCTOR CURRENT,
10A/div
IOUT = 2A TO 20A
LOAD-TRANSIENT RESPONSE
(PWM MODE)MAX17016 toc18
20µs/div
B. VOUT, 20mV/div
C. INDUCTOR CURRENT,
5A/div
1.5V
A. IOUT, 10A/div
IOUT = 1A TO 8A TO 1A
OUTPUT OVERVOLTAGE WAVEFORMMAX17016 toc21
200µs/div
B. PGOOD, 5V/div
1.5V
A. VOUT, 1V/div
IOUT = 2A TO 20A
MAX17016Single Quick-PWM Step-Down
Controller with Internal 26V MOSFETs
(MAX17016 Circuit of Figure 1, VIN = 12V, VDD = 5V, SKIP = GND, RTON = 200kΩ, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
DYNAMIC OUTPUT-VOLTAGE TRANSITION
(PWM MODE)MAX17016 toc22
40µs/div
C. INDUCTOR CURRENT,
10A/div
D. LX, 10V/div
-6A
1.5V
1.5V
1.05V
1.05V
12V
A. REFIN, 500mV/div
B. VOUT, 200mV/div
IOUT = 2A
DYNAMIC OUTPUT-VOLTAGE TRANSITION
(SKIP MODE)MAX17016 toc23
40µs/div
C. INDUCTOR CURRENT,
10A/div
D. LX, 10V/div
10A
1.5V
1.5V
1.05V
1.05V
12V
A. REFIN, 500mV/div
B. VOUT, 200mV/div
IOUT = 2A
MAX17016Single Quick-PWM Step-Down
Controller with Internal 26V MOSFETs
Pin Description
PINNAMEFUNCTION1, 17, 27, 31,
39, 40N.C.No Connection. Not internally connected.EN
Shutdown Control Input. Connect to VDD for normal operation. Pull EN low to put the controller into its
2µA (max) shutdown state. The MAX17016 slowly ramps down the target/output voltage to ground and
after the target voltage reaches 0.1V, the controller forces LX into a high-impedance state and enters
the low-power shutdown state. Toggle EN to clear the fault-protection latch.
3, 28AGNDAnalog Ground. Internally connected to EP1.VDDSupply Voltage Input for the DL Gate Driver. Connect to the system supply voltage (+4.5V to +5.5V).
Bypass VDD to power ground with a 1µF or greater ceramic capacitor.
5, 16LXInductor Connection. Internally connected to EP2. Connect LX to the switched side of the inductor as
shown in Figure 1.
6–15PGNDPower Ground
18–26INPower MOSFET Input Power Source. Internally connected to EP3.TON
Switching Frequency-Setting Input. An external resistor between the input power source and TON sets
the switching period (tSW = 1/fSW) according to the following equation:()FBSWTONTONOUTtCR6.5kV=+Ω
where CTON = 16.26pF and VFB = VREFIN under normal operating conditions. If the TON current
drops below 10µA, the MAX17016 shuts down and enters a high-impedance state.
TON is high impedance in shutdown.BSTBoost Flying Capacitor Connection. Connect to an external 0.1µF, 6V capacitor as shown in
MAX17016
TQFN
(5mm x 5mm)TOP VIEWLX
PGNDPGND
N.C.
N.C.ININAGNDTONBSTININ2
REFIN56728293026242322
REF
SKIP
N.C.
PGND
AGNDVCCPGND
PGOOD
N.C.
N.C.
PGND
PGND
PGND
ILIMFBIN
PGNDPGNDPGND910
N.C.
EP1EP3
AGND
EP2
Pin ConigurationMAX17016Single Quick-PWM Step-Down
Controller with Internal 26V MOSFETs
Pin Description (continued)
PINNAMEFUNCTIONFB
Feedback Voltage Sense Connection. Connect directly to the positive terminal of the output capacitors
for output voltages less than 2V as shown in the Standard Application Circuit (Figure 1). For ixed-output
voltages greater than 2V, connect REFIN to REF and use a resistive divider to set the output voltage
(Figure 6). FB senses the output voltage to determine the on-time for the high-side switching MOSFET.ILIM
Current-Limit Threshold Adjustment. The current-limit threshold is 0.05 times (1/20) the voltage at
ILIM. Connect ILIM to a resistive divider (from REF) to set the current-limit threshold between 20mV
and 100mV (with 0.4V to 2V at ILIM).REFIN
External Reference Input. REFIN sets the feedback regulation voltage (VFB = VREFIN) of the
MAX17016 using a resistor-divider connected between REF and GND. The MAX17016 includes
an internal window comparator to detect REFIN voltage transitions, allowing the controller to blank
PGOOD and the fault protection.REF2V Reference Voltage. Bypass to analog ground using a 1nF ceramic capacitor. The reference can
source up to 50µA for external loads.SKIP
Pulse-Skipping Control Input. This four-level input determines the mode of operation under normal
steady-state conditions and dynamic output-voltage transitions:
VDD (5V) = Forced-PWM operation
REF (2V) = Pulse-skipping mode with forced-PWM during TRANSITIONS
Open (3.3V) = Ultrasonic mode (without forced-PWM during transitions)
GND = Pulse-skipping mode (without forced-PWM during transitions)VCC5V Analog Supply Voltage. Internally connected to VDD through an internal 20Ω resistor. Bypass VCC
to analog ground using a 1µF ceramic capacitor.PGOOD
Open-Drain Power-Good Output. PGOOD is low when the output voltage is more than 200mV (typ)
below or 300mV (typ) above the target voltage (VREFIN), during soft-start, and soft-shutdown. After
the soft-start circuit has terminated, PGOOD becomes high impedance if the output is in regulation.
PGOOD is blanked—forced high-impedance state—when a dynamic REFIN transition is detected.
EP1
(41)AGNDExposed Pad 1/Analog Ground. Internally connected to the controller’s ground plane and substrate.
Connect directly to ground.
EP2
(42)LX
Exposed Pad 2/Inductor Connection. Internally connected to drain of the low-side MOSFET and
source of the high-side MOSFET (Figure 2). Connect LX to the switched side of the inductor as shown
in Figure 1.
EP3
(43)INExposed Pad 3/Power MOSFET Input Power Source. Internally connected to drain of the high-side
MOSFET (Figure 2).
MAX17016Single Quick-PWM Step-Down
Controller with Internal 26V MOSFETs
Figure 1. MAX17016 Standard Application Circuit
Table 1. Component Selection for Standard Applications
Table 2. Component Suppliers1µFOFFON
VDD
VCC
1µF
PGOOD
R10
100kΩ
REFIN
54.9kΩ
40.2kΩ
60.4kΩ
NTC
10kΩ
B = 3435
49.4kΩ
BST
CBST
0.1µFL1
COUT
TON
97.6kΩ
GND/OPEN/REF/VCC
PGND
ILIMLO
REF
RTON
200kΩ
AGND
AGND
PWR
PWR
PWR
AGND
AGND
AGND
18–26, EP3
AGND
SKIP
OUTPUT
1.05V/1.50V
10A (MAX)
INPUT
7V TO 24V
5V BIAS
SUPPLY
MAX17016CIN
PWR
1000pF
49.9kΩ
5, 16, EP2
3, 28, EP1
PWRSEE TABLE 1 FOR COMPONENT SELECTION.
COMPONENT
VOUT = 1.5V/1.05V AT 10A
(Figure 1)
VOUT = 3.3V AT 6A
(Figure 4)
VOUT = 1.5V/1.05V AT 10A
(Figure 1)
VIN = 7V TO 20VTON = 200kΩ (300kHz)
VIN = 7V TO 20VTON = 332kΩ (300kHz)
VIN = 5V TO 12VTON = 100kΩ (600kHz)Input Capacitor(3x) 10µF, 25V
Taiyo Yuden TMK432BJ106KM
(2x) 10µF, 25V
Taiyo Yuden TMK432BJ106KM
(3x) 10µF, 25V
Taiyo Yuden TMK432BJ106KM
Output Capacitor(2x) 330µF, 6mΩ, 2V
Panasonic EEFSX0D331XR(1x) 330µF, 18mΩ, 4V
SANYO 4TPE330MI(1x) 470µF, 7mΩ, 2.5V
SANYO 2R5TPLF470M7
Inductor1.0µH, 3.25mΩ, 20A
Wurth 744 3552 1001.5µH, 14mΩ, 9A
NEC Tokin MPLC1040L3R30.47µH, 3.7mΩ, 15A
Coiltronics FP3-R47-R
MANUFACTURERWEBSITEMANUFACTURERWEBSITEAVX Corp.www.avxcorp.comPulse Engineeringwww.pulseeng.com
BI Technologieswww.bitechnologies.comSANYO Electric Co., Ltd.www.sanyodevice.com
Coiltronicswww.cooperet.comSumida Corpwww.sumida.com
KEMET Corp.www.kemet.comTaiyo Yudenwww.t-yuden.com
Murata Electronics North
America, Inc.www.murata-northamerica.comTDK Corp.www.component.tdk.com
MAX17016Single Quick-PWM Step-Down
Controller with Internal 26V MOSFETs
Standard Application CircuitThe MAX17016 (Figure 1) generates a 1.5V or 1.05V out-
put rail for general-purpose use in a notebook computer.
See Table 1 for component selections. Table 2 lists the
component manufacturers.
Detailed DescriptionThe MAX17016 step-down controller is ideal for the
low-duty-cycle (high-input voltage to low-output voltage)
applications required by notebook computers. Maxim’s
proprietary Quick-PWM pulse-width modulator in the
MAX17016 is specifically designed for handling fast load
steps while maintaining a relatively constant operating
frequency and inductor operating point over a wide range
of input voltages. The Quick-PWM architecture circum-
vents the poor load-transient timing problems of fixed-
frequency, current-mode PWMs while also avoiding the
problems caused by widely varying switching frequencies
in conventional constant-on-time (regardless of input volt-
age) pulse-frequency modulation (PFM) control schemes.
+5V Bias Supply (VCC/VDD)The MAX17016 requires an external 5V bias supply in
addition to the battery. Typically, this 5V bias supply is the
notebook’s main 95% efficient 5V system supply. Keeping
the bias supply external to the IC improves efficiency and
eliminates the cost associated with the 5V linear regulator
that would otherwise be needed to supply the PWM circuit
and gate drivers. If stand-alone capability is needed, the
5V supply can be generated with an external linear regu-
lator such as the MAX1615.
The 5V bias supply powers both the PWM controller and
internal gate-drive power, so the maximum current drawn
is determined by:
IBIAS = IQ + fSWQG = 2mA to 20mA (typ)
The MAX17016 includes a 20Ω resistor between VDD and
VCC, simplifying the printed-circuit board (PCB) layout
requirement.
Free-Running Constant-On-Time PWM
Controller with Input Feed-ForwardThe Quick-PWM control architecture is a pseudo-fixed-
frequency, constant on-time, current-mode regulator with
voltage feed-forward (Figure 2). This architecture relies
on the output filter capacitor’s ESR to act as a current-
sense resistor, so the output ripple voltage provides
the PWM ramp signal. The control algorithm is simple:
the high-side switch on-time is determined solely by a
one-shot whose pulse width is inversely proportional to
tor is low, the low-side switch current is below the valley
current-limit threshold, and the minimum off-time one-shot
has timed out.
On-Time One-ShotThe heart of the PWM core is the one-shot that sets
the high-side switch on-time. This fast, low-jitter, adjust-
able one-shot includes circuitry that varies the on-time
in response to input and output voltage. The high-side
switch on-time is inversely proportional to the input volt-
age as sensed by the TON input, and proportional to the
feedback voltage as sensed by the FB input:
On-Time (tON) = tSW (VFB/VIN)
where tSW (switching period) is set by the resistance
(RTON) between TON and VIN. This algorithm results in
a nearly constant switching frequency despite the lack
of a fixed-frequency clock generator. Connect a resistor
(RTON) between TON and VIN to set the switching period
tSW = 1/fSW:()FBSWTONTON
OUTtCR6.5kV=+Ω
where CTON = 16.26pF. When used with unity-gain
feedback (VOUT = VFB), a 96.75kΩ to 303.25kΩ corre-sponds to switching periods of 167ns (600kHz) to 500ns (200kHz), respectively. High-frequency (600kHz) opera-tion optimizes the application for the smallest component size, trading off efficiency due to higher switching losses.
This might be acceptable in ultra-portable devices where
the load currents are lower and the controller is powered from a lower voltage supply. Low-frequency (200kHz)
operation offers the best overall efficiency at the expense of component size and board space.
For continuous conduction operation, the actual switching
frequency can be estimated by:DISSWONINCHGft(VV)+=−
where VDIS is the sum of the parasitic voltage drops in the
inductor discharge path, including synchronous rectifier,
inductor, and PCB resistances; VCHG is the sum of the
resistances in the charging path, including the high-side
switch, inductor, and PCB resistances; and tON is the on-
time calculated by the MAX17016.
Power-Up Sequence (POR, UVLO)The MAX17016 is enabled when EN is driven high and
the 5V bias supply (VDD) is present. The reference pow-
ers up first. Once the reference exceeds its UVLO thresh-
old, the internal analog blocks are turned on and masked by a 50μs one-shot delay in order to allow the bias
MAX17016Single Quick-PWM Step-Down
Controller with Internal 26V MOSFETs
