1 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

2 Applications

• WLAN/Wi-Fi access point

• Modem (cable/DSL/GFAST)

• Small business router

• Electricity meter

• STV and DVR

• Appliances

3 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.