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1FEATURES

2? Low-Noise Spread Spectrum Operation

? 1.8V/1.6V Selectable Output Voltage

? 2% Output Voltage Regulation

? > 75% Efficiency in 1.8V Mode

? Very Low Output Ripple: 10mV @ 300mA

? Output Currents up to 300mA

? 2.5V to 5.5V Input Voltage Range

? Shutdown Disconnects Load from VIN

? 1.15MHz Switching Frequency

? No Inductors…Small Solution Size

? Short Circuit and Thermal Protection

? 0.5mm pitch, DSBGA-9 (1.511 × 1.511mm ×

0.6mm)

APPLICATIONS

? Power Supply for DSP's, Memory, and

Microprocessors

? Mobile Phones and Pagers

? Digital Cameras, Portable Music Players, and

Other Portable Electronic Devices

DESCRIPTION

The LM2773 is a switched capacitor step-down

regulator that produces a selectable 1.8V or 1.6V

output. It is capable of supplying loads up to 300mA.

The LM2773 operates with an input voltage from 2.5V

to 5.5V, accommodating 1-cell Li-Ion batteries and

chargers.

The LM2773 utilizes a regulated charge pump with

gains of 2/3x and 1x. It has very low ripple and noise

on both the input and output due to its pre-regulated

1.15MHz (typ.) switching frequency and spread

spectrum operation. When output currents are low,

the LM2773 automatically switches to a low-ripple PFM regulation mode to maintain high efficiency over

the entire load range.

The LM2773 is available in TI's 0.5mm pitch 9-bump

DSBGA.