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TPS5405
  • TPS5405

TPS5405

ACTIVE

6.5V to 28V Input, 5V Fixed Output at 2A Step-Down Regulator with Intregrated MosFET

Texas Instruments TPS5405 Product Info

1 April 2026 3

Parameters

Rating

Catalog

Topology

Buck

Iout (max) (A)

2

Vin (max) (V)

28

Vin (min) (V)

6.8

Vout (max) (V)

5.15

Vout (min) (V)

4.85

Features

Adjustable soft start, Fixed Output, Light-load efficiency, Spread-spectrum clocking (SSC)

EMI features

Spread Spectrum

Control mode

current mode

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.0001

Duty cycle (max) (%)

93

Package

SOIC (D)-8-29.4 mm² 4.9 x 6

Features

  • Fixed 5-V Output
  • 6.5-V to 28-V Wide Input Voltage Range
  • Up to 2-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)
  • Peak Current-Mode Control
  • Cycle-by-Cycle Over Current Protection
  • Switching Node Anti-Ringing to Ease EMI Issue
  • External Soft Start
  • Available in SOIC8 Package
  • Fixed 5-V Output
  • 6.5-V to 28-V Wide Input Voltage Range
  • Up to 2-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)
  • Peak Current-Mode Control
  • Cycle-by-Cycle Over Current Protection
  • Switching Node Anti-Ringing to Ease EMI Issue
  • External Soft Start
  • Available in SOIC8 Package

Description

The TPS5405 is a monolithic non-synchronous buck regulator with wide operating input voltage range from 6.5 V to 28 V. Current mode control with internal slope compensation is implemented to reduce component count.

TPS5405 also features a light load pulse skipping mode, which allows for a power loss reduction from the input power supply to the system at light loading.

The switching frequency of the converters can be set from 50 kHz to 1.1 MHz with an external resistor. Frequency spread spectrum operation is introduced for EMI reduction.

LX anti-ringing is added to address high frequency EMI issues.

A cycle-by-cycle current limit with frequency fold back protects the IC at over loading condition.

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