MAX1672EEE+-MAX1672EEE+T-MAX1672EEE-T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX1672EEE-T ,Step-Up/Down DC-DC Converter in QSOP PackageFeaturesThe MAX1672 integrates a step-up DC-DC converter with a ♦ Step-Up/Down Voltage Conversionli ..
MAX1673ESA ,Regulated / 125mA-Output / Charge-Pump DC-DC InverterELECTRICAL CHARACTERISTICS(V = V = +5V, C = 10µF, C = 22µF, C = 2.2µF, T = -40°C to +85°C, unless o ..
MAX1673ESA ,Regulated / 125mA-Output / Charge-Pump DC-DC InverterApplications Typical Operating CircuitINPUT 2V TO 5.5V___________________Pin ConfigurationONINREGUL ..
MAX1673ESA ,Regulated / 125mA-Output / Charge-Pump DC-DC InverterFeaturesThe MAX1673 charge-pump inverter provides a low-' Regulated Negative Output Voltagecost, co ..
MAX1673ESA+ ,Regulated, 125mA Output, Charge Pump DC-DC InverterApplicationsHard Disk Drives Measurement InstrumentsCamcorders ModemsAnalog Signal-Processing Digit ..
MAX1673ESA+T ,Regulated, 125mA Output, Charge Pump DC-DC InverterFeaturesThe MAX1673 charge-pump inverter provides a low-♦ Regulated Negative Output Voltagecost, co ..
MAX4427ESA ,Dual High-Speed 1.5A MOSFET Drivers
MAX4427ESA ,Dual High-Speed 1.5A MOSFET Drivers
MAX4427ESA ,Dual High-Speed 1.5A MOSFET Drivers
MAX4427ESA+ ,Dual High-Speed, 1.5A MOSFET Drivers
MAX4427ESA+T ,Dual High-Speed, 1.5A MOSFET Drivers
MAX4428CSA ,Dual High-Speed 1.5A MOSFET Drivers

MAX1672EEE+-MAX1672EEE+T-MAX1672EEE-T
Step-Up/Down DC-DC Converter in QSOP Package
________________General Description
The MAX1672 integrates a step-up DC-DC converter with a
linear regulator to provide step-up/down voltage conver-
sion. This device provides a constant output voltage for
inputs that vary above and below the output voltage. It has
a 1.8V to 11V input range and a preset 3.3V or 5V output.
The output can also be set from 1.25V to 5.5V using two
resistors. Typical efficiency is 85%.
The MAX1672’s step-up/linear-regulator configuration per-
mits the use of a single, physically smaller inductor than
can be used with competing SEPIC and flyback configura-
tions. Switch current is also selectable, permitting the use
of smaller inductors in low-current applications. The linear
regulator also acts as a filter to reduce output ripple voltage.
The MAX1672 has a low 85µA quiescent supply current, which
is further reduced to 0.1µA in logic-controlled shutdown. The
output voltage is disconnected from the input in shutdown.
The MAX1672 also has a PGI/PGOlow-battery detector.
The MAX1672 comes in a 16-pin QSOP package (same size
as a standard 8-pin SO). For a larger device that delivers more
output current, refer to the MAX710/MAX711. The preassem-
bled MAX1672 evaluation kit is available to speed designs.
________________________Applications
Single-Cell, Lithium-Powered2-Cell to 4-Cell AA Alkaline
Portable DevicesHand-Held Equipment
3.3V and Other Low-VoltageBattery-Powered Devices
Systemswith AC Input Adapters
Digital Cameras
____________________________FeaturesStep-Up/Down Voltage Conversion1.8V to 11V Input Range3.3V/5V or Adjustable Output Voltage RangeOutput Current:
300mA at 5V (VIN≥2.5V)
150mA at 5V (VIN≥1.8V)Smaller Inductor than SEPIC and FlybacksLoad Disconnects from Input in ShutdownSupply Current from Battery:
85μA (No-Load)
0.1μA (Shutdown)PGI/PGOLow-Battery Comparator16-Pin QSOP Package
(Same Footprint as 8-pin SO)No External FETs RequiredThermal and Short-Circuit Protection
MAX1672
Step-Up/Down DC-DC Converter
in QSOP Package
19-1307; Rev 2; 11/02
EVALUATION KIT MANUAL
FOLLOWS DATA SHEET
Ordering Information
*Dice are tested at TA= +25°C.LX
PGND
GND
REF
OUT
TOP VIEW
MAX1672
QSOP
PGND
ONA
ILIM
PGO
PGI
3/5
ONB
Pin Configuration
MAX1672
ONA
PGI
ONB
OFFON
PGNDGND
3.3V/5V
OUTPUT
INPUT
1.8V TO 11V
LOW-BATTERY
DETECTOR
OUTPUT
OUT
PG0REF
OFF
3/5
ILIM
0.8A
3.3V
0.5A
Typical Operating Circuit
PART
MAX1672C/D
MAX1672EEE-40°C to +85°C
0°C to +70°C
TEMP RANGEPIN-PACKAGE
Dice*
16 QSOP
MAX1672
Step-Up/Down DC-DC Converter
in QSOP Package
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VPS= 6V, CREF= 0.1µF, COUT= 4.7µF, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
Stresses 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.
IN, PS, LX, OUT, PGOto GND .........................-0.3V to +11.5V
ILIM, ONA, ONB, FB, 3/5,
REF, PGI to GND......................................-0.3V to (VPS+ 0.3V)
PGND to GND.......................................................-0.3V to +0.3V
OUT Short Circuit to GND..........................................Continuous
Output Current..................................................................350mA
Continuous Power Dissipation (TA= +70°C)
16-Pin QSOP (derate above +70°C by 8.3mW/°C).......667mW
Operating Temperature Range .........................-40°C to +85°C
Junction Temperature ....................................................+150°C
Storage Temperature Range ...........................-65°C to +160°C
Lead Temperature (soldering, 10s)................................+300°C
VPS= 5.5V
VOUT = 0V, ONA = GND, ONB= PS
VPS= 2.7V, IOUT= 50mA
VPS= 5.5V, IOUT= 50mA
ILIM = GND
VLX= 11V, ONA = GND, ONB= PS
VPS= 2.7V, ILX= 50mA
IREF= 0mA
VPS= 5.5V, ILX= 50mA
VIN= GND to 11V
ONA = GND, ONB= PS, current measured into PS pin
ONA = PS or ONB= GND, current measured into PS pin,
IOUT= 0mA
VIN= 2V, 3/5= GND, FB = GND, IOUT= 10mA to 150mA
VFB= 1.3V
VIN= 3V to 5V, 3/5= GND, IOUT= 100mA
Hysteresis = 15mV typical
CONDITIONS0.350.71.4Output PFET Current Limit0.11Output PFET Leakage Current2.34.6
1.22.4Output PFET Resistance
0.350.50.650.11LX Leakage Current0.92.0LX On-Resistance0.61.336IN Input Current150FB Input Current70FB Dual-Mode Trip Threshold
4.85.20.91.811.0Input Voltage
Startup Voltage
1.211.251.291.211.251.29Reference Voltage0.11Shutdown Quiescent Current85125Quiescent Current
4.755.005.251.255.5Output Voltage Adjustment
Range
%/mA0.003Output Load Regulation
%/V0.15Output Line Regulation
UNITSMINTYPMAXPARAMETER3.173.43
Output Voltage
FB = GND,
IOUT= 0mA to
150mA= 0°C to +85°C= -40°C to +85°C= 0°C to +85°C= -40°C to +85°C1.201.30FB VoltageTA= 0°C to +85°C= -40°C to +85°C
ILIM = PS
LX Current Limit0.60.81.0= 0°C to +85°C= -40°C to +85°C= 0°C to +85°C= -40°C to +85°C
3/5= PS
OUT = FB
3/5= GND
VPS= 6.8V
MAX1672
Step-Up/Down DC-DC Converter
in QSOP Package
ELECTRICAL CHARACTERISTICS (continued)
(VPS= 6V, CREF= 0.1µF, COUT= 4.7µF, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
Note 1:Specifications to -40°C are guaranteed by design.
ONA, ONB, 3/5; ILIM= 0°C to +85°C
VPGO= 11V
IPGO = 2mA, VPGI= 1.2V
CONDITIONS30Hysteresis20150Thermal Shutdown Threshold
Thermal Shutdown Hysteresis0.4Input Low Voltage
1.211.290.11PGOOutput Leakage0.10.4PGOOutput Low Voltage
UNITSMINTYPMAXPARAMETER
ONA, ONB, 3/5; ILIMV1.6Input High Voltage
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. OUTPUT CURRENT
(VOUT = 5V)
MAX1672-01
OUTPUT CURRENT (mA)
EFFICIENCY (%)70VIN = 5VVIN = 3.6V
VIN = 1.8V
VIN = 0.9V
VIN = 2.7V
EFFICIENCY vs. OUTPUT CURRENT
(VOUT = 3.3V)
MAX1672-02
OUTPUT CURRENT (mA)
EFFICIENCY (%)70VIN = 3.3V
VIN = 1.8V
VIN = 0.9V
VIN = 2.7V
EFFICIENCY vs. INPUT VOLTAGE
(IOUT = 10mA)
MAX1672-03
INPUT VOLTAGE (V)
EFFICIENCY (%)VOUT = 3.3V
VOUT = 5V
VPGI= 1.3VnA150PGI Input Bias Current
ONA, ONB, 3/5, ILIMnA1100Input Bias Current= -40°C to +85°CV1.191.251.31PGI Threshold Voltage
PGI/PGOCOMPARATOR
LOGIC AND CONTROL INPUTS
MAX1672
Step-Up/Down DC-DC Converter
in QSOP Package
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
MAXIMUM OUTPUT CURRENT vs.
INPUT VOLTAGE (VOUT = 5V)
MAX1672-04
INPUT VOLTAGE (V)
MAXIMUM OUTPUT CURRENT (mA)
MAXIMUM RECOMMENDED
OUTPUT CURRENT
ILIM = GND (0.5A)
ILIM = PS (0.8A)
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE (VOUT = 3.3V)
MAX1672-05
INPUT VOLTAGE (V)
MAXIMUM OUTPUT CURRENT (mA)
MAXIMUM RECOMMENDED
OUTPUT CURRENT
ILIM = GND (0.5A)
ILIM = PS (0.8A)
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
(POWER DISSIPATION LIMIT)
MAX1672-06
INPUT VOLTAGE (V)
MAXIMUM OUTPUT CURRENT (mA)
MAXIMUM RECOMMENDED
OUTPUT CURRENT
VOUT = 5V
VOUT = 3.3V
TA = +25°C
TA = +85°C
VOUT = 3.3V
VOUT = 5V
MAXIMUM RECOMMENDED INPUT VOLTAGE
NO-LOAD BATTERY CURRENT
vs. INPUT VOLTAGE
MAX1672-07
INPUT VOLTAGE (V)
SUPPLY CURRENT (
VOUT = 5V
VOUT = 3.3V
2ms/div
LINE-TRANSIENT RESPONSE
MAX1672-10
A: VOUT = 5V (100mV/div, AC COUPLED)
B: VIN = 2V TO 4V (IOUT = 100mA)
SHUTDOWN CURRENT
vs. INPUT VOLTAGE
MAX1672-08
INPUT VOLTAGE (V)
SUPPLY CURRENT (
LINEAR REGULATOR POWER-SUPPLY
REJECTION RATIO vs. FREQUENCY
MAX1672-09
FREQUENCY (kHz)
PSRR (dB)
2ms/div
LOAD-TRANSIENT RESPONSE
MAX1672-11
A: VOUT = 5V (50mV/div, AC COUPLED)
B: IOUT = 10mA TO 100mA (VIN = 2V)
10μs/div
OUTPUT RIPPLE (MEDIUM LOAD)
MAX1672-12
A: VOUT = 5V (20mV/div, AC COUPLED)
B: IL1 (500mA /div) (VIN = 2.7V, IOUT = 80mA)
MAX1672
Step-Up/Down DC-DC Converter
in QSOP Package
______________________________________________________________Pin Description
NAMEFUNCTIONLXInductor Connection to the Drain of the Internal N-Channel Power MOSFET
PIN
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
10μs/div
OUTPUT RIPPLE (HEAVY LOAD)
MAX1672-13
A: VOUT = 5V (20mV/div, AC COUPLED)
B: IL1 (500mA/div) (VIN = 2.7V, IOUT = 250mA)
50μs/div
STARTUP DELAY
MAX1672-14
A: VOUT = (2V/div)
B: ONB (2V/div) (VIN = 2.7V, RLOAD = 50Ω)
200μs/div
TURN-OFF DELAY
MAX1672-15
A: VOUT = (2V/div)
B: ONB (2V/div) (VIN = 2.7V, RLOAD = 50Ω)PGNDPower GroundONBOn Control Input. When ONB= low or ONA = high, the IC is on. Connect ONBto GND for normal operation
(Table 1).ONAOn Control Input. When ONA = low and ONB= high, the IC is off. Connect ONA to PS for normal operation
(Table 1).3/5Output Voltage Selection Input. Connect to PS for 3.3V output and to GND for 5V output. With VFB> 80mV,
the state of the 3/5pin is ignored (Table 2).PGILow-Battery Detector Input (1.25Vthreshold)PGOLow-Battery Detector Output (open drain). PGOpulls low when VPGIis greater than 1.25V.ILIMInductor-Current-Limit Selection Input. Connect to PS for 0.8A current limit and to GND for 0.5A current limit.OUTRegulator Output. Drain of internal PFET linear regulator. Bypass with a 4.7µF capacitor to GND.FBFeedback Input. For 3.3V or 5V output, connect to GND. For adjustable output, connect to feedback resistor-
divider network. With VFB> 70mV, the state of the 3/5pin is ignored.PSBootstrapped Power Supply. Output of step-up switch-mode regulator and source of internal PFET linear
regulator. The IC is powered from this pin.INInput Voltage Sense Input. Connect to input supply.REFReference Voltage Output. Bypass with a 0.1µF capacitor to GND.GNDAnalog GroundPGNDPower GroundLXInductor Connection to the Drain of the Internal N-Channel Power MOSFET
MAX1672
Step-Up/Down DC-DC Converter
in QSOP Package
ILIM
PGND
OUT
100mV
MAX1672
ΔTON
FIXED TOFF
GENERATOR
DRV
REF
ERROR
AMP 2
ERROR
AMP 1
INPUT
MONITOR
CURRENT-LIMIT
COMPARATOR
OFF
REFERENCE
GENERATOR
FB1
FB2
REF + OFFSET
REF
REF
PGI
PGO
3/5
REF
ONB
ONA
OUT
70mV
GND
Figure 1. Functional Diagram

Partno	Mfg	Dc	Qty	Available	Descript
MAX1672EEE+ \|MAX1672EEE	MAXIM	N/a	43	avai	Step-Up/Down DC-DC Converter in QSOP Package
MAX1672EEE+T \|MAX1672EEET	MAXIM	N/a	1500	avai	Step-Up/Down DC-DC Converter in QSOP Package
MAX1672EEE-T \|MAX1672EEET	MAXIM	N/a	6575	avai	Step-Up/Down DC-DC Converter in QSOP Package