LTC3407-3
Info: : PRODUCTION
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LTC3407-3

Dual Synchronous, 1.8V/0.8A and 3.3V/0.8A 2.25MHz Step-Down DC/DC Regulator

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $3.54
Features
  • Very Low Quiescent Current: Only 40µA
  • 1.8V at 800mA/3.3V at 800mA
  • High Efficiency: Up to 95%
  • 2.25MHz Constant Frequency Operation
  • High Switch Current: 1.2A on Each Channel
  • No Schottky Diodes Required
  • Low RDS(ON) Internal Switches: 0.35Ω
  • VIN: 3.3V to 5.5V
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Short-Circuit Protected
  • Low Dropout Operation: 100% Duty Cycle
  • Ultralow Shutdown Current: IQ < 1µA
  • Power-On Reset Output
  • Externally Synchronizable Oscillator
  • Small Thermally Enhanced 3mm × 3mm DFN Package
Additional Details
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The LTC3407-3 is a dual, constant frequency, synchronous step down DC/DC converter. Intended for low power applications, it operates from 3.3V to 5.5V input voltage range and has a constant 2.25MHz switching frequency, allowing the use of tiny, low cost capacitors and inductors with a profile ≤1.0mm. Internal synchronous 0.35Ω, 1.2A power switches provide high efficiency without the need for external Schottky diodes.

A user selectable mode input is provided to allow the user to trade-off noise ripple for low power efficiency. Burst Mode® operation provides high efficiency at light loads, while Pulse Skip Mode provides low noise ripple at light loads.

To further maximize battery life, the P-channel MOSFETs are turned on continuously in dropout (100% duty cycle), and both channels draw a total quiescent current of only 40µA. In shutdown, the device draws <1µA.


Iout Fsw Features
LTC3407 2x 600mA 1.5MHz  
LTC3407-2 2x 800mA 2.25MHz  
LTC3407-3 2x 800mA 2.25MHz Fixed 1.8V/3.3V
LTC3407-4 2x 800mA 2.25MHz Reduced POR Delay
LTC3407A 2x 600mA 1.5MHz Low Ripple Burst Mode
LTC3407A-2 2x 800mA 2.25MHz Low Ripple Burst Mode

Applications

  • PDAs/Palmtop PCs
  • Digital Cameras
  • Cellular Phones
  • Portable Media Players
  • PC Cards
  • Wireless and DSL Modems

Part Models 2
1ku List Price Starting From $3.54

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3407EDD-3#PBF
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LTC3407EDD-3#TRPBF
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Software and Part Ecosystem

Software and Part Ecosystem

Tools & Simulations

Tools & Simulations 2

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

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