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The TPS5405 is a monolithic non-synchronous buck regulator with a wide operating input voltage range (6.5V to 28V). The device implements internal slope-compensated current-mode control to reduce component count.

The TPS5405 also features a light-load pulse-skipping mode that reduces power loss from the input power supplying the system at light loads.

The switching frequency of this converter can be programmed from 50kHz to 1.1MHz using an external resistor. Frequency spread spectrum operation was introduced to reduce EMI.

Added LX anti-ringing to address high frequency EMI issues.

Cycle-by-cycle current limit with frequency foldback protects integrated circuits (ICs) during overload conditions.

characteristic

Fixed 5V output

Wide Input Voltage Range from 6.5V to 28V

Up to 2A Maximum Continuous Output Load Current

Pulse-skipping mode for high efficiency at light loads

Over 80% Efficiency at 10mA Load_Adjustable 50kHz to 1.1MHz Switching Frequency Set by One External Resistor

(Leave pin ROSC floating. Set the frequency to

120kHz)

Peak Current Mode Control

Cycle-by-cycle overcurrent protection

Anti-Ringing Switch Nodes to Mitigate Electromagnetic Interference (EMI) Issues

External soft start

Available in Small Outline Integrated Circuit (SOIC)8 package

Scope of application

9V, 12V and 24V Distributed Power Systems

Consumer applications such as home appliances, set-top boxes, CPE equipment, LCD displays, peripherals, and battery chargers

Industrial and In-Vehicle Entertainment System Power Supplies