85737 Ismaning, de
+49 (7131) 9234-0
Synchronous 400mA DC/DC Buck-Boost Converter & 200mA Synchronous Buck in a 3mm x 3mm QFN
The LTC3522’s unique synchronous buck-boost topology on its 400mA channel enables it to regulate a constant output voltage when the input voltage is above, equal to or below the output, allowing it to use the entire stored energy of the Li-Ion battery. The LTC3522 utilizes automatic Burst Mode® operation, requiring only 25uA (both channels) of no load quiescent current. For applications that require very low noise, the Burst Mode function can be defeated and replaced with a continuous PWM mode. Shutdown current is less than 1uA, further extending battery run-time. Each channel has independent internal soft-start ensuring design flexibility. Other features include short-circuit protection, over-temperature protection, and a power good flags.
LTC3522EUD is available from stock in a 16-Lead QFN package.
Summary of Features: LTC3522
- Dual High Efficiency DC/DC Converters:
Buck-Boost (VOUT: 2.2V to 5.25V, IOUT: 400mA for VIN > 3V, VOUT = 3.3V)
Buck (VOUT: 0.6V to VIN, IOUT: 200mA)
- 2.4V to 5.5V Input Voltage Range
- Pin Selectable Burst Mode Operation
- 25uA Total Quiescent Current for Both Converters in Burst Mode Operation
- Independent Power Good Indicator Outputs
- Integrated Soft-Start
- Thermal and Overcurrent Protection
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