DC-DC Switching Boost Step Up Regulator, Adjustable, 500mV-4.5Vin, 2.4V-5.25Vout, 1.5Aout, QFN-24

LTC3421EUF#PBF - DC-DC Switching Boost Step Up Regulator, Adjustable, 500mV-4.5Vin, 2.4V-5.25Vout, 1.5Aout, QFN-24

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Product Overview

The LTC3421EUF#PBF is a high-efficiency current-mode fixed frequency step-up DC-to-DC Converter with true output disconnect and inrush current limiting. The device includes a 0.10R N-channel MOSFET switch and a 0.14R P-channel synchronous rectifier. This product has the ability to simply program the output voltage, switching frequency, current limit, soft-start, Burst Mode® threshold and loop compensation with external passive components. Quiescent current is only 12µA during Burst Mode® operation and maximizing battery life. The oscillator frequency can be programmed up to 3MHz and can be synchronized to an external clock applied to the SYNC pin. An open-drain uncommitted low-battery comparator is included. The part maintains operation in applications with a secondary cell powering the output voltage during shutdown. Other features include 1µA shutdown, anti-ringing control, thermal limit and reference output.
  • True output disconnect
  • Inrush current limiting
  • Programmable current limit
  • Programmable soft-start
  • Synchronizable oscillator
  • Low-battery comparator
  • Guaranteed 1V start-up
  • Synchronous rectification - Up to 96% efficiency


Computers & Computer Peripherals, Consumer Electronics, Sensing & Instrumentation, Power Management

Product Information

Synchronous Boost (Step Up)
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MSL 1 - Unlimited
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