LTC3403

PRODUCTION

1.5MHz, 600mA Synchronous Step-Down Regulator with Bypass Transistor

Data Sheet Product Selection Table
Part Models
2
1ku List Price
Starting From $2.85
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Part Details

  • Dynamically Adjustable Output from 0.3V to 3.5V
  • Very Low Quiescent Current: Only 20µA During Operation
  • 600mA Output Current
  • Internal P-Channel MOSFET Bypass Transistor
  • High Efficiency: Up to 96%
  • 1.5MHz Constant Frequency Operation
  • No Schottky Diode Required
  • Low Dropout Operation: 100% Duty Cycle
  • 2.5V to 5V Input Voltage Range
  • Drives Optional External P-Channel MOSFET
  • Shutdown Mode Draws < 1µA Supply Current
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Overtemperature Protected
  • Available in 8-Lead 3mm x 3mm DFN Package
LTC3403
1.5MHz, 600mA Synchronous Step-Down Regulator with Bypass Transistor
Figure 1a. WCDMA Transmitter Power Supply Figure 1b. Efficiency vs Output Current Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Technical Articles 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Digital Power System Managers 1
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LTC3880
RECOMMENDED FOR NEW DESIGNS Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
Single-Supply Monitors 1
LTC2934
PRODUCTION Ultra-Low Power Adjustable Supervisor with Power-Fail Output
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTC3403

LTpowerCAD 1

LTspice

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.

LTpowerCAD

LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

Evaluation Kits

eval board
schematic 1
DC560A

LTC3403EDD | WCDMA Cellular Phone Buck Regulator, 2.7V to 5V Input, Output @ 600mA

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Product Details

DC560A: Demo Board for the LTC3403 1.5MHz, 600mA Synchronous Step-Down Regulator with Bypass Transistor.


 
DC560A
LTC3403EDD | WCDMA Cellular Phone Buck Regulator, 2.7V to 5V Input, Output @ 600mA
DC560A - Schematic

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