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LTC3522 - Synchronous 400mA Buck-Boost and 200mA Buck Converters

General Description

The LTC®3522 combines a 400mA buck-boost DC/DC converter with a 200mA synchronous buck DC/DC converter in a tiny 3mm × 3mm package.

The 1MHz switching frequency minimizes the solution footprint while maintaining high efficiency.

Key Features

  • 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.
  • 25μA 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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Other Datasheets by Linear Technology (now Analog Devices)

Part Number Description
LTC3520 Synchronous 1A Buck-Boost and 600mA Buck Converters
LTC3521 1A Buck-Boost DC/DC And Dual 600mA Buck DC/DC Converters
LTC3526 500mA 1MHz Synchronous Step-Up DC/DC Converters
LTC3526-2 500mA 2MHz Synchronous Step-Up DC/DC Converters
LTC3526B 500mA 1MHz Synchronous Step-Up DC/DC Converters

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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LTC3522 Synchronous 400mA Buck-Boost and 200mA Buck Converters FEATURES ■ 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 ■ 25μA Total Quiescent Current for Both Converters in Burst Mode Operation ■ Independent Power Good Indicator Outputs ■ Integrated Soft-Start ■ Thermal and Overcurrent Protection ■ <1μA Quiescent Current in Shutdown ■ Small 0.75mm × 3mm × 3mm QFN Package APPLICATIONS ■ Flash-Based MP3 Players ■ Medical Instruments ■ Digital Cameras ■ PDAs, Handheld PCs ■ Personal Navigation Devices , LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation.