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TPS561243
  • TPS561243
  • TPS561243

TPS561243

ACTIVE

4.2V to 17V input voltage, 1A, 1.2MHz synchronous buck converter in SOT563 with Eco-mode

Texas Instruments TPS561243 Product Info

1 April 2026 3

Parameters

Rating

Catalog

Topology

Buck

Iout (max) (A)

1

Vin (max) (V)

17

Vin (min) (V)

4.2

Vout (max) (V)

7

Vout (min) (V)

0.6

Features

Enable, Light Load Efficiency, Over Current Protection, Soft Start Fixed, Synchronous Rectification

Control mode

D-CAP3

Operating temperature range (°C)

-40 to 125

Iq (typ) (A)

0.00011

Duty cycle (max) (%)

95

Package

SOT-5X3 (DRL)-6-2.56 mm² 1.6 x 1.6

Features

  • Configured for a wide range of applications
    • Input voltage range: 4.2V to 17V
    • Output voltage range: 0.6V to 7V
    • Reference voltage: 0.6V
    • ±1.5% reference voltage accuracy
    • Integrated FETs: 100mΩ and 55mΩ
    • Low quiescent current for TPS561243: 110µA
    • Switching frequency: 1280kHz
    • Maximum 95% large duty cycle operation
    • Fixed soft-start time: 1.4ms
  • Easy of use and small design size
    • TPS561243 Eco-mode and TPS561246 FCCM mode at light load
    • D-CAP3™ control mode with fast transient response
    • Support start-up with prebiased output
    • Non-latch for OT and UVLO protection
    • Cycle-by-cycle over current limit
    • Hiccup mode for UV protection
    • Operating junction temperature range: –40°C to 125°C
    • SOT563 package: 1.6mm × 1.6mm
  • Create a custom design using the TPS56124x with the WEBENCH® Power Designer
  • Configured for a wide range of applications
    • Input voltage range: 4.2V to 17V
    • Output voltage range: 0.6V to 7V
    • Reference voltage: 0.6V
    • ±1.5% reference voltage accuracy
    • Integrated FETs: 100mΩ and 55mΩ
    • Low quiescent current for TPS561243: 110µA
    • Switching frequency: 1280kHz
    • Maximum 95% large duty cycle operation
    • Fixed soft-start time: 1.4ms
  • Easy of use and small design size
    • TPS561243 Eco-mode and TPS561246 FCCM mode at light load
    • D-CAP3™ control mode with fast transient response
    • Support start-up with prebiased output
    • Non-latch for OT and UVLO protection
    • Cycle-by-cycle over current limit
    • Hiccup mode for UV protection
    • Operating junction temperature range: –40°C to 125°C
    • SOT563 package: 1.6mm × 1.6mm
  • Create a custom design using the TPS56124x with the WEBENCH® Power Designer

Description

The TPS56124x is a simple, easy-to-use, synchronous buck converter with input voltage ranging from 4.2V to 17V and supports up to 1A continuous current.

The device is designed to operate with minimum external component counts and low standby current.

This switch mode power supply (SMPS) device employs D-CAP3 control mode providing a fast transient response and supporting both low equivalent series resistance (ESR) output capacitors such as specialty polymer and ultra-low ESR ceramic capacitors with no external compensation components.

The TPS561243 operates in Eco-mode, which maintains high efficiency during light load operation. The TPS561246 operates in FCCM mode, which keeps the same frequency and lower output ripple during all load conditions. The TPS56124x integrates complete protection including OCP, UVLO, OTP, and UVP with hiccup.

The TPS56124x is available in a 6pin, 1.6mm × 1.6mm SOT563 (DRL) package. The junction temperature is specified from –40°C to 125°C.

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