TPS5403
www.ti.com SLVSBK5 – SEPTEMBER 2012 4.5-V TO 28-V INPUT VOLTAGE, 3.3-V FIXED OUTPUT, 1.7-A OUTPUT CURRENT,
NON-SYNCHRONOUS STEP-DOWN REGULATOR WITH INTEGRATED MOSFET
Check for Samples: TPS5403 FEATURES 1 Fixed 3.3-V Output
4.5-V to 28-V Wide Input Voltage Range
Up to 1.7-A Maximum Continuous Output
Loading Current
Pulse Skipping Mode to Achieve High Light
Load Efficiency
Over 80% Efficiency at 10-mA Loading
Adjustable 50-kHz to 1.1-MHz Switching
Frequency Set by an External Resistor
(Leave pin ROSC floating. Set frequency to
120 kHz and ground connection to 70 kHz)
Peak Current-Mode Control
Cycle-by-Cycle Over Current Protection
Frequency Spread Spectrum and Switching
Node Anti-Ringing to Ease EMI Issue
External Soft Start
Available in SOIC8 Package APPLICATIONS 5-V, 9-V, 12-V and 24-V Distributed Power
Systems
Consumer Applications Such as Home
Appliances, Set-Top Boxes, CPE Equipment, …
