Analog Devices Inc.

High Efficiency Low Noise Synchronous Step-Down Switching Regulators Features: Maintains Constant Frequency at Low Output Currents Programmable Fixed Frequency (PLL Lockable) Wide VIN Range: 3.5V to 36V Operation Low Minimum On-Time (≤300ns) for High Frequency, Low Duty Cycle Applications Dual N-Channel MOSFET Synchronous Drive Very Low Dropout Operation: 99% Duty Cycle Low Dropout, 0.5A Linear Regulator for CPU I/O or Low Noise Audio Supplies Built-In Power-On Reset Timer Programmable Soft Start Low-Battery Detector Remote Output Voltage Sense Foldback Current Limiting (Optional) Pin Selectable Output Voltage Logic Controlled Micropower Shutdown: IQ < 25µA Output Voltages from 1.19V to 9V Available in 24-Lead Narrow SSOP and 28-Lead SSOP Packages

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