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.