1 Features

• Configured for a wide range of applications

– 3V to 17V wide input voltage range

– Fixed 3.3V output for TPSM861253

– 0.6V to 10V output range for TPSM861252

– 0.6V to 5.5V output range for TPSM861257

– 0.6V reference voltage

– ±1 for 0.6Vref accuracy at 25°C

– ±1.5 for 0.6Vref accuracy at –40°C to 125°C

– ±1 for 3.3Vout accuracy from 0 to 65°C

– Integrated 55mΩ and 24mΩ MOSFETs

– 100μA low quiescent current for TPSM861252

– 1.4MHz switching frequency

– Maximum 95 large duty cycle operation

– 1.2V precision EN threshold voltage

– 1.6ms fixed typical soft-start time

• Ease of use and small design size

– TPSM861252 Eco-mode, TPSM861253/7

FCCM mode at light load

– Fast transient D-CAP3™ control mode

– Easy layout with integrated inductor and

bootstrap capacitor

– Support start-up with prebiased output voltage

– Open-drain power-good indicator

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

– Hiccup mode in UV protection

– Cycle-by-cycle OC and NOC protection

– –40°C to 125°C operating junction temperature

– 3.3mm × 4mm × 2mm QFN package

• Create a custom design using the TPSM86125x

with the WEBENCH® Power Designer

2 Applications

• Merchant network and server PSU

• AC/DC adapters/PSU

• Factory automation and control

• Test and measurement

3 Description

The TPSM86125x is a simple, easy-to-use, highefficiency,

high-power density, synchronous buck

module with input voltage ranging from 3V to 17V and

supports up to 1A continuous current.

The TPSM86125x 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

95 duty cycle operation.

The TPSM861252 operates in Eco-mode, which

maintains high efficiency during light load. The

TPSM861257 operates in FCCM mode, which keeps

the same frequency and lower output ripple during

all load conditions. TPSM861253 is a fixed 3.3V

output voltage part with FCCM mode. The device

also integrates the divider resistors and a feedforward

capacitor inside the module. The TPSM86125x

integrates complete protection including OVP, OCP,

UVLO, OTP, and UVP with hiccup.

The device is available in QFN package. The junction

temperature is specified from –40°C to 125°C.