MAX1774 Dual, High-Efficiency, Step-Down Converter With Backup Battery Switchover

The MAX1774 is a complete power-supply solution for PDAs and other hand-held devices. It integrates two high-efficiency Step-down converters, a boost converter for backup battery regulation, and four voltage detectors in a small 32-pin QFN or 28-pin QSOP package.
The MAX1774 accepts inputs from +2.7V to +28V and provides an adjustable main output from 1.25V to 5.5V atover 2A. The secondary core converter delivers an adjustable voltage from 1V to 5V and CAN deliver up to 1.5A. Both the main and core Regulators have separate shutdown inputs.
When the AC adapter power is removed, an external P-Channel MOSFET switches input to the main battery. When the main battery is low, the backup Step-up converter sustains the main output voltage. When the backup battery CAN no longer deliver the required load, the system shuts down safely to prevent damage. Four on-board voltage detectors monitor the status of the AC adapter power, main battery, and backup battery.
The MAX1774 evaluation kit is available to help reduce design time.
By Maxim Integrated Products
MAX1774 's PackagesMAX1774 's pdf datasheet
MAX1774EMJ
MAX1774EEI QSOP
MAX1774EEI-T QSOP
MAX1774EEIT QSOP




MAX1774 Pinout, Pinouts
MAX1774 pinout,Pin out
This is one package pinout of MAX1774,If you need more pinouts please download MAX1774's pdf datasheet.

MAX1774 Application circuits
MAX1774 circuits
This is one application circuit of MAX1774,If you need more circuits,please download MAX1774's pdf datasheet.


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