MAX1714BEEE+T ,High-Speed Step-Down Controller for Notebook ComputersApplicationsV VCC DDNotebook ComputersSHDNV+CPU Core SupplyBSTILIMChipset/RAM Supply as Low as 1V O ..
MAX1715 ,Ultra-High-Efficiency, Dual Step-Down Controller for Notebook ComputersELECTRICAL CHARACTERISTICS(Circuit of Figure 1, 4A components from Table 1, V V = +5V, SKIP = AGND, ..
MAX1715 ,Ultra-High-Efficiency, Dual Step-Down Controller for Notebook ComputersApplicationsNotebook Computers5V INPUT BATTERY CPU Core Supply4.5V TO 28VV V+DDChipset/RAM Supply a ..
MAX1715 ,Ultra-High-Efficiency, Dual Step-Down Controller for Notebook ComputersFeaturesThe MAX1715 PWM controller provides the high effi-♦ Ultra-High Efficiencyciency, excellent ..
MAX1715EEI ,Ultra-High Efficiency / Dual Step-Down Controller for Notebook ComputersMAX171519-1541; Rev 0; 1/00Ultra-High Efficiency, Dual Step-DownController for Notebook Computers
MAX1715EEI+ ,Ultra-High-Efficiency, Dual Step-Down Controller for Notebook ComputersFeaturesThe MAX1715 PWM controller provides the high effi-♦ Ultra-High Efficiencyciency, excellent ..
MAX4543ESA ,Low-Voltage, Single-Supply Dual SPST/SPDT Analog SwitchesELECTRICAL CHARACTERISTICS—Single +5V Supply(V+ = +5V ±10%, GND = 0, V = 2.4V, V = 0.8V, T = T to T ..
MAX4543ESA+ ,Low-Voltage, Single-Supply Dual SPST/SPDT Analog SwitchesGeneral Description ________
MAX4543EUA ,Low-Voltage, Single-Supply Dual SPST/SPDT Analog SwitchesGeneral Description ________
MAX4543EUA+ ,Low-Voltage, Single-Supply Dual SPST/SPDT Analog SwitchesFeatures♦ 60Ω max (33Ω typ) Low RONThe MAX4541–MAX4544 are precision, dual analogswitches designed ..
MAX4543EUA-T ,Low-Voltage, Single-Supply Dual SPST/SPDT Analog SwitchesELECTRICAL CHARACTERISTICS—Single +5V Supply(V+ = +5V ±10%, GND = 0, V = 2.4V, V = 0.8V, T = T to T ..
MAX4544CPA ,Low-Voltage, Single-Supply Dual SPST/SPDT Analog SwitchesApplicationsMAX4541CUA 0°C to +70°C 8 µMAX —Battery-Operated Systems Test EquipmentMAX4541CSA 0 ..
MAX1714A-MAX1714AEEP+-MAX1714AEEP+T-MAX1714AEEP-T-MAX1714BEEE+-MAX1714BEEE+T
High-Speed Step-Down Controller for Notebook Computers
General DescriptionThe MAX1714 pulse-width modulation (PWM) controller
provides the high efficiency, excellent transient
response, and high DC output accuracy needed for
stepping down high-voltage batteries to generate low-
voltage CPU core or chip-set/RAM supplies in notebook
computers.
Maxim’s proprietary Quick-PWM™ quick-response,
constant-on-time PWM control scheme handles wide
input/output voltage ratios with ease and provides
100ns “instant-on” response to load transients while
maintaining a relatively constant switching frequency.
The MAX1714 achieves high efficiency at a reduced
cost by eliminating the current-sense resistor found in
traditional current-mode PWMs. Efficiency is further
enhanced by an ability to drive very large synchronous-
rectifier MOSFETs.
Single-stage buck conversion allows these devices to
directly step down high-voltage batteries for the highest
possible efficiency. Alternatively, two-stage conversion
(stepping down the +5V system supply instead of the
battery) at a higher switching frequency allows the mini-
mum possible physical size.
The MAX1714 is intended for CPU core, chipset,
DRAM, or other low-voltage supplies as low as 1V. The
MAX1714A is available in a 20-pin QSOP package and
includes overvoltage protection. The MAX1714B is
available in a 16-pin QSOP package with no overvolt-
age protection. For applications requiring VID compli-
ance or DAC control of output voltage, refer to the
MAX1710/MAX1711 data sheet. For a dual output ver-
sion, refer to the MAX1715†data sheet.
ApplicationsNotebook Computers
CPU Core Supply
Chipset/RAM Supply as Low as 1V
1.8V and 2.5V I/O Supply
FeaturesUltra-High EfficiencyNo Current-Sense Resistor (Lossless ILIMIT)Quick-PWM with 100ns Load-Step Response1% VOUTAccuracy Over Line and Load2.5V/3.3V Fixed or 1V to 5.5V Adjustable Output
Range2V to 28V Battery Input Range200/300/450/600kHz Switching FrequencyOvervoltage Protection (MAX1714A)Undervoltage Protection1.7ms Digital Soft-StartDrives Large Synchronous-Rectifier FETs2V ±1% Reference OutputPower-Good Indicator
MAX1714
High-Speed Step-Down Controller
for Notebook Computers19-1536; Rev 2; 8/05
Pin Configurations appear at end of data sheet.Quick-PWM is a trademark of Maxim Integrated Products.Future product—contact factory for availability.
-40°C to +85°C
PARTMAX1714AEEP
TEMP RANGEPIN-PACKAGE20 QSOP
Ordering InformationVCC
+5V INPUT
BATTERY
4.5V TO 28V
OUTPUT
1.25V TO 2V
SHDN
ILIM
BST
PGND
(GND)
OUT
SKIP
VDD
MAX1714
REF
PGOOD
AGND
(GND)
( ) ARE FOR THE MAX1714B ONLY.
Minimal Operating CircuitMAX1714AEEP+-40°C to +85°C20 QSOP
+Denotes lead-free package.
MAX1714BEEE-40°C to +85°C16 QSOP
MAX1714BEEE+-40°C to +85°C16 QSOP
EVALUATION KIT
AVAILABLE
MAX1714
High-Speed Step-Down Controller
for Notebook Computers
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.
V+ to AGND (Note 1)..............................................-0.3V to +30V
VDD, VCCto AGND (Note 1).....................................-0.3V to +6V
PGND to AGND (Note 1)...................................................±0.3V
SHDN,PGOOD, OUT to AGND (Note 1)..................-0.3V to +6V
ILIM, FB, REF, SKIP,
TON to AGND (Notes 1, 2)....................-0.3V to (VCC+0.3V)
DL to PGND (Note 1)..................................-0.3V to (VDD+0.3V)
BST to AGND (Note 1)...........................................-0.3V to +36V
DH to LX.....................................................-0.3V to (BST +0.3V)
LX to BST..................................................................-6V to +0.3V
REF Short Circuit to AGND.........................................Continuous
Continuous Power Dissipation (TA= +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C)..........667mW
20-Pin QSOP (derate 9.1mW/°C above +70°C)..........727mW
Operating Temperature Range ..........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
V+ = 4.5V to 28V,
SKIP= VCCSHDN= 0 , V+ = 28V, VCC= VDD= 0 or 5VSHDN= 0
VCC,VDDSHDN= 0
Battery voltage, V+
FB forced above the regulation point
FB forced above the regulation point
Rising edge of SHDNto full ILIM
(Note 4)
V+ = 24V,
VOUT= 2V
(Note 4)
ILOAD= 0 to 3A, SKIP= VCC
VCC= 4.5V to 5.5V, V+ = 4.5V to 28V
CONDITIONS<15Shutdown Supply Current (V+)<15Shutdown Supply Current (VDD)<15Shutdown Supply Current (VCC)2540Quiescent Supply Current (V+)<15Quiescent Supply Current (VDD)550750Quiescent Supply Current (VCC)400500Minimum Off-Time
0.991.01.01Error Comparator Threshold
(DC Output Voltage Accuracy)
(Note 3)
TON = REF (450kHz)
4.55.5V228Input Voltage Range
TON = AGND (600kHz)
On-Time 1.7Soft-Start Ramp Time-0.10.1FB Input Bias Current
TON = unconnected (300kHz)9Load Regulation Error5Line Regulation Error
UNITSMINTYPMAXPARAMETERFalling edge, hysteresis = 40mV
REF in regulation
IREF= 0 to 50µA
VCC= 4.5V to 5.5V, no external REF load1.6REF Fault Lockout Voltage10REF Sink Current0.01Reference Load Regulation1.9822.02Reference Voltage
TON = VCC(200kHz)
Note 1:For the MAX1714B, AGND and PGND refer to a single pin designated GND.
Note 2:SKIPmay be forced below -0.3V, temporarily exceeding the absolute maximum rating, disabling over/undervoltage fault
detection for the purpose of debugging prototypes (Figure 6). Limit the current drawn to 5mA maximum.
ELECTRICAL CHARACTERISTICS(Circuit of Figure 1, 4A components from Table 1, V+ = +15V, VCC= VDD= +5V, SKIP= AGND, TA= 0°C to +85°C, unless otherwise
noted.) (Note 1)
FB = AGNDkΩ100190300OUT Input Resistance
FB = OUT
2.4752.52.525FB = AGND
FB = VCC3.2673.33.333
MAX1714
High-Speed Step-Down Controller
for Notebook Computers
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, 4A components from Table 1, V+ = +15V, VCC= VDD= +5V, SKIP= AGND, TA= 0°C to +85°C, unless otherwise
noted.) (Note 1)
CONDITIONSUNITSMINTYPMAXPARAMETERPGND - LX
PGND - LX, ILIM= VCC
From SHDNsignal going high405060Current-Limit Threshold
(Positive Direction, Adjustable)90100110Current-Limit Threshold
(Positive Direction, Fixed)1030Output Undervoltage Protection
Blanking Time 657075Output Undervoltage Protection
Threshold
PGND - LX, SKIP= VCC, TA= +25°C,
with respect to positive current-limit threshold%-90-120-140Current-Limit Threshold
(Negative Direction)
VILIM= 0.5V
VILIM= 2.0V170200230
Rising edge, hysteresis = 20mV,
PWM disabled below this levelV4.14.4VCCUndervoltage Lockout
Threshold
BST - LXforced to 5VΩ1.55DHGate-Driver On-Resistance
DL, high stateΩ1.55DLGate-Driver On-Resistance
(Pull-Up)
DL, low stateΩ0.51.7DLGate-Driver On-Resistance
(Pull-Down)
DH forced to 2.5V, BST - LX forced to 5VA1DHGate-Driver Source/Sink
Current
DL forced to 2.5VA1DLGate-Driver Source Current
DL forced to 2.5VA3DLGate-Driver Sink Currentforced 2% above trip threshold (MAX1714A only)µs1.5Overvoltage Fault Propagation
Delay10.512.514.5Overvoltage Trip Threshold
FB forced 2% below PGOOD trip threshold, falling edgeµs1.5PGOODPropagation Delay
PGND - LX, SKIP= AGNDmV3Current-Limit Threshold
(Zero Crossing)
ISINK= 1mAV0.4PGOOD Output Low Voltage
High state, forced to 5.5VµA1PGOOD Leakage Current
Hysteresis = 10°C°C150Thermal Shutdown Threshold
With respect to error comparator threshold (MAX1714A only)
With respect to error comparator threshold
DL risingns35Dead TimeDH rising26SKIPInput Current Logic
Threshold
To disable overvoltage and undervoltage fault detection, = +25°C-1.5-0.1PGOODTrip ThresholdMeasured at FB with respect to error comparator
threshold, falling edge-8-6-4Logic Input High VoltageSHDN, SKIP2.4Logic Input Low VoltageSHDN, SKIP0.8Logic Input CurrentSHDN, SKIP-11ILIM Input CurrentSHDN, SKIP±10
MAX1714
High-Speed Step-Down Controller
for Notebook Computers
ELECTRICAL CHARACTERISTICS(Circuit of Figure 1, 4A components from Table 1, V+ = 15V, VCC = VDD= +5V, SKIP= AGND, TA
= -40°C to +85°C, unless other-wise noted.) (Notes 1, 5)
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, 4A components from Table 1, V+ = +15V, VCC= VDD= +5V, SKIP= AGND, TA= 0°C to +85°C, unless otherwise
noted.) (Note 1)
CONDITIONSVCC- 0.4TON VCCLevel3.153.85TON Float Voltage1.652.35TON Reference Level0.5TON AGND Level
Forced to AGND or VCCµA-33TON Input Current
UNITSMINTYPMAXPARAMETERTON = VCC(200kHz)
Reference Voltage1.982.02VVCC= 4.5V to 5.5V, no external REF load
PARAMETERMINTYPMAXUNITSTON = unconnected (300kHz)On-Time
TON = AGND (600kHz)
Input Voltage Range 228V4.55.5
TON = REF (450kHz)
Error Comparator Threshold
(DC Output Voltage Accuracy)
(Note 3)
With respect to error comparator threshold
(MAX1714A only)
Minimum Off-Time
FB = AGND
500ns
Quiescent Supply Current (VCC)
FB = OUT
750µA
Logic Input Current-11µASHDN, SKIP
Logic Input Low Voltage0.8VSHDN, SKIP
Logic Input High Voltage
FB = VDD
2.4VSHDN, SKIP
VCCUndervoltage Lockout
Threshold4.14.4Rising edge, hysteresis = 20mV, PWM disabled below
this level
Output Undervoltage
Protection Threshold 6575
CONDITIONSWith respect to error comparator threshold
VILIM= 2.0V
VILIM= 0.5VCurrent-Limit Threshold
(Positive Direction, Adjustable)65
V+ = 24V,
VOUT= 2V
(Note 4)
(Note 4)
Overvoltage Trip Threshold
FB forced above the regulation point
PGND - LX
Current-Limit Threshold (Positive
Direction, Fixed)
Battery voltage, V+115
VCC,VDDPGND - LX, ILIM = VCC
V+ = 4.5V to 28V,
SKIP= VCC15%
MAX1714
High-Speed Step-Down Controller
for Notebook ComputersEFFICIENCY vs. LOAD CURRENT
(4A COMPONENTS, VOUT = 2.5V, 300kHz)
MAX1714B-01
LOAD CURRENT (A)
EFFICIENCY (%)
VIN = 7V
VIN = 20V
VIN = 12V
EFFICIENCY vs. LOAD CURRENT
(8A COMPONENTS, VOUT = 1.6V, 300kHz)
MAX1714B-02
LOAD CURRENT (A)
EFFICIENCY (%)
VIN = 20VVIN = 12V
VIN = 7V
EFFICIENCY vs. LOAD CURRENT
(1.5A COMPONENTS, VOUT = 2.5V,
TON = GND, 600kHz)
MAX1714B-03
LOAD CURRENT (A)
EFFICIENCY (%)
VIN = 5V
Note 1:For the MAX1714B, AGND and PGND refer to a single pin designated GND.
Note 2:SKIPmay be forced below -0.3V, temporarily exceeding the absolute maximum rating, disabling over/undervoltage fault
detection for the purpose of debugging prototypes (Figure 6). Limit the current drawn to 5mA maximum.
Note 3:When the inductor is in continuous conduction, the output voltage will have a DC regulation level higher than the error-
comparator threshold by 50% of the ripple. In discontinuous conduction (SKIP= AGND, light-loaded), the output voltage
will have a DC regulation level higher than the trip level by approximately 1.5% due to slope compensation.
Note 4:On-time and off-time specifications are measured from 50% point to 50% point at the DH pin with LX = PGND, VBST= 5V,
and a 250pF capacitor connected from DH to LX. Actual in-circuit times may differ due to MOSFET switching speeds.
Note 5:Specifications to -40°C are guaranteed by design, not production tested.
__________________________________________Typical Operating Characteristics(Circuit of Figure 1, components from Table 1, VIN= +15V, SKIP= AGND, TON= unconnected, TA= +25°C, unless otherwise noted.)
CONDITIONSMeasured at FB with respect to error comparator
threshold, falling edge%-8-4PGOOD Trip Threshold
ISINK= 1mAV0.4PGOOD Output Low Voltage
High state, forced to 5.5VµA1PGOOD Leakage Current
UNITMINTYPMAXPARAMETER
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, 4A components from Table 1, V+= +15V, VCC = VDD= +5V, SKIP= AGND, TA
= -40°C to +85°C, unless other-wise noted.) (Notes 1, 5)
