Linear Technology LTC3520
Synchronous 1A Buck-Boost and 600mA Buck Converters
FEATURES
n Dual High Efficiency DC/DC Converters: Buck-Boost (VOUT: 2.2V to 5.25V, IOUT = 1A at VOUT = 3.3V, VIN ≥ 3V) Buck (VOUT: 0.8V to VIN, IOUT = 600mA) n 2.2V to 5.5V Input Voltage Range n Pin-Selectable Burst Mode® Operation n Uncommitted Gain Block for LDO Controller, Battery Good Indication or Sequencing n Programmable 100kHz to 2MHz Switching Frequency n 55μA Total Quiescent Current for Both Converters in Burst Mode Operation n Thermal and Overcurrent Protection n <1μA Quiescent Current in Shutdown n 24-Lead 4mm × 4mm QFN PackageAPPLICATIONS
n Portable Media Players n Digital Cameras n Handheld PCs, PDAs n GPS Receivers L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5481178, 6166527, 6304066, 6404251, 6580258.DESCRIPTION
The LTC®3520 combines 1A buck-boost and 600mA synchronous buck DC/DC converters in a tiny 4mm × 4mm package.