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.