LM2771SD/NOPB

LM2771 www.ti.com SNVS435A – MARCH 2006 – REVISED MAY 2013 LM2771 Low-Ripple 250mA Switched Capacitor Step-Down DC/DC Converter Check for Samples: LM2771 FEATURES DESCRIPTION • • • • • • • • • • • • The LM2771 is a switched capacitor step-down regulator that produces a 1.5V output without the use of an inductor. It is capable of supplying loads up to 250mA. The LM2771 operates with an input voltage from 2.7V to 5.5V, and requires only 3 low-cost ceramic capacitors. 1 2 Low-Noise Fixed Frequency Operation 1.5V Output Voltage Li-Ion (3.6V) to 1.5V with 81% Efficiency 1.7% Output Voltage Accuracy Very Low Output Ripple: 8mV @ 250mA Output Currents up to 250mA 2.7V to 5.5V Input Range Shutdown Disconnects Load from VIN 1.1MHz Switching Frequency No Inductors…Small Solution Size Current Limit and Thermal Protection WSON-10 Package (3mm × 3mm × 0.8mm) APPLICATIONS • • • The LM2771 uses a regulated 0.5x charge pump to give power conversion efficiencies nearly twice as high as an LDO. Pre-regulated 1.1MHz fixedfrequency switching results in very low ripple and noise on both the input and the output. When output currents are low (