LM2770 - National Semiconductor

LM2770 High Efficiency Switched Capacitor Step-Down DC/DC Regulator

The LM2770 is a switched capacitor step-down regulator that is ideal for powering low-voltage applications in portable systems. The LM2770 can supply load currents up to 250mA and operates over an input voltage range of 2.7V to 5.5V. This makes the LM2770 a great choice for systems powered by 1-cell Li-Ion batteries and chargers. The output voltage of the LM.

Features

n High Efficiency Multi-Gain Architecture: Peak Power Efficiency > 85% n Output Voltage Pairs: 1.2V/1.5V and 1.2V/1.575V n Dynamic Output Voltage Selection n ± 3% Output Voltage Accuracy n Output Currents up to 250mA n 2.7V to 5.5V Input Range n Low-Supply-Current Sleep Mode n 55µA Quiescent Supply Current in Full-Power Mode n Soft-Start n Short-Circuit Protection in Full-Power Mode n Current-Limit Protection in Sleep Mode n LLP-10 Package (3mm x 3mm x 0.8mm) Applications n n n n DSP Power Supplies Baseband Power Supplies Mobile Phones and Pagers Portable Electronic Equipment Typical Applica.