1 Features

• Configured for a wide range of applications

– 3-V to 16-V input voltage range

– 0.6-V to 7-V output voltage range

– 0.6-V reference voltage

– ±1 reference accuracy at 25°C

– ±1.5 reference accuracy at –40°C to 125°C

– Integrated 55.0-mΩ and 24.3-mΩ MOSFETs

– 100-μA low quiescent current

– 600-kHz switching frequency

– Maximum 97 large duty cycle operation

– Precision EN threshold voltage

– 1.6-ms fixed typical soft-start time

• Ease of use and small solution size

– TPS564252 Eco-mode, TPS564257 FCCM

mode, TPS564255 OOA mode at light loading

– D-CAP3™ control mode

– Easy layout with integrated bootstrap capacitor

– Support start-up with prebiased output

– Open-drain power-good indicator

– Non-latch for OV, OT, and UVLO protection

– Hiccup mode for UV protection

– Cycle-by-cycle OC and NOC protection

– 1.6-mm × 1.6-mm SOT-563 package

2 Applications

• WLAN/Wi-Fi access point, switch, router

• Pro-audio, surveillance, drone

• TV, STB and DVR, smart speaker

• SSD

• Electricity meter

3 Description

The TPS56425x is a simple, easy-to-use, high

efficiency, high power density, synchronous buck

converter with input voltage ranging from 3-V to 16-V

and supports up to 4-A continuous current at output

voltages between 0.6 V and 7 V.

The TPS56425x employs D-CAP3 control mode to

provide a fast transient response and to support

low-ESR output capacitors with no requirement for

external compensation. The device can support up

to 97 duty cycle operation. Integrated bootstrap

capacitor helps achieve single layer PCB and can

save total BOM cost.

The TPS564252 operates in Eco-mode, which

maintains high efficiency during light loading. The

TPS564257 operates in FCCM mode, which keeps

the same frequency and lower output ripple during

all load conditions. The TPS564255 operates in OOA

mode, which prevents audio noise generation. The

device integrates complete protection through OVP,

OCP, UVLO, OTP, and UVP with hiccup.

The device is available in 1.6 mm × 1.6 mm SOT-563

package. The junction temperature is specified from

–40°C to 125°C.