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Maxim MAX1672 step-up/down dc-dc converter MAX1672EEE
MAXIM MAX1672 Step-Up/Down DC-DC Converter MAX1672EEE
The MAX1672 integrates a step-up DC-DC converter with a linear regulator to provide step-up/down voltage conversion. 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 permits the use of a single, physically smaller inductor than can be used with competing SEPIC and flyback configurations. 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/PGO-bar low-battery detector.
The MAX1672 comes in a 16-pin QSOP package (same size as a standard 8-pin SO).
* Step-Up/Down Voltage Conversion
* 3.3V/5V or Adjustable Output Voltage Range
300mA at 5V (VIN > 2.5V)
150mA at 5V (VIN > 1.8V)
* Smaller Inductor than SEPIC and Flybacks
* Load Disconnects from Input in Shutdown
* Supply Current from Battery:
* PGI/PGO-bar Low-Battery Comparator
* 16-Pin QSOP Package (Same Footprint as 8-pin SO)
* No External FETs Required
* Thermal and Short-Circuit Protection
* You can download a datasheet. Click here
* 2-Cell to 4-Cell AA Alkaline Hand-Held Equipment
* 3.3V and Other Low-Voltage Systems
* Single-Cell, Lithium-Powered Portable Devices
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