Description

Dual High Efficiency, Low Noise, Synchronous Step-Down Switching Regulators Features: Maintains Constant Frequency at Low Output Currents Dual N-Channel MOSFET Synchronous Drive Programmable Fixed Frequency (PLL Lockable) Wide VIN Range: 3.5V to 36V Operation Ultrahigh Efficiency Very Low Dropout Operation: 99% Duty Cycle Low Dropout, 0.5A Linear Regulator for VPP Generation or Low Noise Audio Supply Built-In Power-On Reset Timer Programmable Soft Start Low-Battery Detector Remote Output Voltage Sense Foldback Current Limiting (Optional) Pin Selectable Output Voltage 5V Standby Regulator Active in Shutdown: IQ < 200 µA Output Voltages from 1.19V to 9V Available in 28- and 36-Lead SSOP Packages