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TPS61289
  • TPS61289
  • TPS61289

TPS61289

ACTIVE

25V 20A bidirectional buck-boost converter

Texas Instruments TPS61289 Product Info

1 April 2026 5

Parameters

Rating

Catalog

Topology

Boost, Buck, Buck/Boost

Vin (max) (V)

24

Vin (min) (V)

0.5

Vout (max) (V)

25

Vout (min) (V)

4.5

Switch current limit (typ) (A)

20

Features

< 150 W applications, Adjustable switching frequency, Bidirectional, Boost Sync, Cycle-by-cycle overcurrent protection

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.00019

Duty cycle (max) (%)

99.5

Package

VQFN-HR (RZP)-14-7.5 mm² 3 x 2.5

Features

  • VLOW voltage range: 0.5V to 23V
    • The minimum VLOW voltage is determined by the VLOW/VHIGH ratio and frequency
  • VHIGH voltage range: 4.5V to 25V
  • Pin selectable bidirectional buck or boost mode
  • Buck/boost forced PWM mode operation
  • High efficiency and power capability
    • Programmable current limit: 5A to 20A
    • Integrated 8.5mΩ high-side MOSFET
  • Switching frequency
    • FSW 250kHz when VLOW > 1.7V
    • FSW down to 100kHz when VLOW < 1.5V
    • FSW down to 50kHz when VLOW < 0.5V
    • 200mV hysteresis prevents frequency jitter
  • Synchronization capability to external clock
  • Rich protection
    • VHIGH overvoltage protection at 27V
    • VHIGH undervoltage protection at 3.1V
    • VCC undervoltage protection at 2.15V
    • Precise EN/UVLO threshold
    • Cycle-by-cycle overcurrent protection
    • Thermal shutdown
  • 2.5mm × 3.0mm VQFN 14 HotRod™ Lite package
  • VLOW voltage range: 0.5V to 23V
    • The minimum VLOW voltage is determined by the VLOW/VHIGH ratio and frequency
  • VHIGH voltage range: 4.5V to 25V
  • Pin selectable bidirectional buck or boost mode
  • Buck/boost forced PWM mode operation
  • High efficiency and power capability
    • Programmable current limit: 5A to 20A
    • Integrated 8.5mΩ high-side MOSFET
  • Switching frequency
    • FSW 250kHz when VLOW > 1.7V
    • FSW down to 100kHz when VLOW < 1.5V
    • FSW down to 50kHz when VLOW < 0.5V
    • 200mV hysteresis prevents frequency jitter
  • Synchronization capability to external clock
  • Rich protection
    • VHIGH overvoltage protection at 27V
    • VHIGH undervoltage protection at 3.1V
    • VCC undervoltage protection at 2.15V
    • Precise EN/UVLO threshold
    • Cycle-by-cycle overcurrent protection
    • Thermal shutdown
  • 2.5mm × 3.0mm VQFN 14 HotRod™ Lite package

Description

The TPS61289 is a bidirectional buck/boost synchronous converter that integrates the high-side synchronous rectifier MOSFET and uses an external low side MOSFET. The TPS61289 can be configured as a buck or boost converter using the MODE pin. The TPS61289 can support 20A switching current and the VHIGH voltage supports up to 25V. The minimum VLOW voltage is determined by the VLOW/VHIGH ratio and frequency, for example, the VLOW voltage can support as low as 0.5V at the VHIGH = 15V condition. The device provides an excellent balance of efficiency, thermal dissipation and solution size for high power bidirectional conversion.

The TPS61289 offers adjustable switching current limit function. In addition, the device provides VHIGH overvoltage and undervoltage protection, cycle-by-cycle overcurrent protection, and thermal shutdown protection.

The TPS61289 offers a very small solution size with 2.5mm x 3.0mm VQFN HotRod™ Lite package with minimal external components.

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