MAX1672EEE ,Step-Up/Down DC-DC Converter in QSOP PackageApplications______________Ordering InformationSingle-Cell, Lithium-Powered 2-Cell to 4-Cell AA Alka ..
MAX1672EEE+ ,Step-Up/Down DC-DC Converter in QSOP PackageApplicationsOrdering InformationSingle-Cell, Lithium-Powered 2-Cell to 4-Cell AA AlkalinePART TEMP ..
MAX1672EEE+T ,Step-Up/Down DC-DC Converter in QSOP PackageELECTRICAL CHARACTERISTICS(V = 6V, C = 0.1µF, C = 4.7µF, T = -40°C to +85°C, unless otherwise noted ..
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 ..
MAX4427CSA-T ,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+ ,Dual High-Speed, 1.5A MOSFET Drivers
MAX4427ESA+T ,Dual High-Speed, 1.5A MOSFET Drivers
MAX1672EEE
Step-Up/Down DC-DC Converter in QSOP Package
________________General DescriptionThe 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.
________________________ApplicationsSingle-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
__________________Pin Configuration
__________Typical Operating Circuit
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, 10sec)............................+300°C
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.
__________________________________________Typical Operating Characteristics(TA = +25°C, unless otherwise noted.)
MAX1672
Step-Up/Down DC-DC Converter
in QSOP Package
_____________________________Typical Operating Characteristics (continued)(TA = +25°C, unless otherwise noted.)
MAX1672
Step-Up/Down DC-DC Converter
in QSOP Package
______________________________________________________________Pin Description
_____________________________Typical Operating Characteristics (continued)(TA = +25°C, unless otherwise noted.)
MAX1672
Step-Up/Down DC-DC Converter
in QSOP PackageFigure 1. Functional Diagram
