LTC3672B-2
FEATURES n Triple Output Supply From a Single 2.9V to 5.5V Input n Buck DC/DC: Fixed 1.2V Output, Up to 400m A n LDO1: Fixed 2.8V Output, Up to 150m A n LDO2: Fixed 1.8V Output, Up to 150m A n ±2.5% Reference Accuracy n Constant-Frequency 2.25MHz Operation n Minimum External ponent Count n Current Mode Operation for Excellent Line and Load
Transient Response n Internal Soft-Start for Each Output n Single Enable Pin Turns On/Shuts Down All Three
Outputs n Tiny 2mm × 2mm × 0.75mm DFN Package
APPLICATIONS n DMB and DVB-H Cellphones n Handheld Products (PDA, PMP, GPS) n Multivoltage Power for Digital Logic, I/O, FPGAs,
CPLDs, ASICs, CPUs, and RF Chipsets
DESCRIPTION
The LTC®3672B-2 is a triple power supply posed of a 400m A synchronous buck regulator and two 150m A low-dropout linear regulators (LDOs). Constant-frequency 2.25MHz operation is maintained down to very light loads. The input supply range of 2.9V to 5.5V is especially wellsuited for single-cell Lithium-Ion and Lithium-Polymer...
