LTC3672B-1
LTC3672B-1 is Monolithic Fixed-Output 400mA Buck Regulator manufactured by Linear Technology.
Monolithic Fixed-Output 400m A Buck Regulator with Dual 150m A LDOs in 2mm × 2mm DFN
Features
- Triple Output Supply From a Single 2.9V to 5.5V Input
- Buck DC/DC: Fixed 1.8V Output, Up to 400m A
- LDO1: Fixed 1.2V Output, Up to 150m A
- LDO2: Fixed 2.8V Output, Up to 150m A
- ±2.5% Reference Accuracy
- Constant Frequency 2.25MHz Operation
- Minimum External ponent Count
- Current Mode Operation for Excellent Line and Load
Transient Response
- Internal Soft-Start for Each Output
- Single Enable Pin Turns On/Shuts Down All Three
Outputs
- Tiny 2mm × 2mm × 0.75mm DFN Package
APPLICATIONS
- DMB Cellphones
- Handheld Products (PDA, PMP, GPS)
- Multivoltage Power for Digital Logic, I/O, FPGAs,
CPLDs, ASICs, CPUs, and RF Chipsets
DESCRIPTION
The LTC®3672B-1 is a triple power supply posed of a 400m A synchronous buck regulator and two 150m A lowdropout linear regulators (LDOs), where one of the LDOs can be powered from the buck output to improve efficiency. Constant-frequency 2.25MHz operation is maintained down to very light loads. The input supply range of 2.9V to 5.5V is especially well-suited for single-cell Lithium-Ion and Lithium-Polymer applications, and for powering low voltage ASICs from 3.3V or 5V rails.
The LTC3672B-1 regulates 1.8V at the buck output, 1.2V at the LDO1 output, and 2.8V at the LDO2 output. External ponent count is minimal- all that is needed is a single inductor, an input capacitor, and output capacitors for each of the three outputs. Control loop pensation is internal to the LTC3672B-1.
The LTC3672B-1 is available in a 2mm × 2mm × 0.75mm 8-Lead DFN package.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
VIN 2.9V TO 5.5V
2.2MF
ENABLE...
