Description

The SC197 contains two identical high efficiency 500mA step-down regulators designed for use in battery powered applications. Each regulator includes 15 programmable output voltage settings that can be selected using the four control pins, eliminating the need for external feedback resistors. The output voltage can be fixed to a single setting or dynamically switched between

different levels. Pulling all four control pins low disables the output.

Features

Input Voltage — 2.9V to 5.5V

Output Voltage — 0.8V to 3.3V

Output current capability — 500mA per regulator

Efficiency up to 94

Programmable output voltages — 15

High light-load efficiency via automatic PSAVE mode

Fast transient response

Oscillator frequency — 3.5MHz

100 duty cycle capability

Quiescent current — 38µA typical per regulator

Shutdown current — 0.1µA typical per regulator

Internal soft-start

Over-voltage protection

Current limit and short circuit protection

Over-temperature protection

Under-voltage lockout

Floating control pin protection

MLPQ-UT18 2.0 x 3.0 x 0.6 (mm) package

Lead-free, halogen-free, and RoHS/WEEE compliant

Aplications

Smart phones and cellular phones

MP3/Personal media players

Personal navigation devices

Digital cameras

Single Li-ion cell or 3 NiMH/NiCd cell devices

Devices with 3.3V or 5V internal power rails