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LT3481 Datasheet 2.2.8MHz Step-Down Switching Regulator

Manufacturer: Linear Technology (now Analog Devices)

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General Description

The LT®3481 is an adjustable frequency (300kHz to 2.8MHz) monolithic buck switching regulator that accepts input voltages up to 34V (36V maximum).

A high efficiency 0.18Ω switch is included on the die along with a boost Schottky diode and the necessary oscillator, control, and logic circuitry.

Current mode topology is used for fast transient response and good loop stability.

Overview

LT3481 36V, 2A, 2.8MHz Step-Down Switching Regulator with 50µA Quiescent.

Key Features

  • Wide Input Range: 3.6V to 34V Operating, 36V Maximum.
  • 2A Maximum Output Current.
  • Low Ripple Burst Mode® Operation 50μA IQ at 12VIN to 3.3VOUT Output Ripple < 15mV.
  • Adjustable Switching Frequency: 300kHz to 2.8MHz.
  • Low Shutdown Current: IQ < 1μA.
  • Integrated Boost Diode.
  • Power Good Flag.
  • Saturating Switch Design: 0.18Ω On-Resistance.
  • 1.265V Feedback Reference Voltage.
  • Output Voltage: 1.265V to 20V.
  • Soft-Start Capability.
  • Synchronizable B.

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