LM2773 Datasheet | Texas Instruments

.ti. SNVS554A - JANUARY 2008 - REVISED MAY 2013 LM2773 Low-Ripple 1.8V/1.6V Spread-Spectrum Switched Capacitor Step-Down Regulator Check for Samples: LM2773 Features - 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: 10m V @ 300m A - Output Currents up to 300m A - 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) 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 300m A. The LM2773 operates with an input voltage from 2.5V to 5.5V, acmodating 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. APPLICATIONS - Power Supply for DSP's, Memory, and Microprocessors - Mobile Phones and Pagers - Digital Cameras, Portable Music Players, and Other Portable Electronic Devices Typical Application...