1 Features

? Features and configured for a wide range of

applications

– 3-V to 17-V input voltage range

– 0.6-V to 10-V output voltage range for

TPSM863252

– 0.6-V to 5.5-V output voltage range for

TPSM863257

– Fixed 3.3-V output voltage for TPSM863253

– 0.6-V reference voltage

– ± 1 reference accuracy at 25°C

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

– Integrated 55-mΩ and 24-mΩ MOSFETs

– 100-μA low quiescent current

– 1.2-MHz switching frequency

– Maximum 95 large duty cycle operation

– Precision EN threshold voltage

– 1.6-ms fixed typical soft-start time

? Ease of use and small design size

– TPSM863252 Eco-mode, TPSM863257 forced

continuous conduction (FCCM) mode at light

loading

– Fast transient D-CAP3? control mode

– Easy layout with integrated bootstrap capacitor

and inductor

– 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

– 3.3-mm × 4-mm × 2-mm QFN package

2 Applications

? Merchant network and server PSU

? Other AC/DC adapters/PSU

? Factory automation and control

? Test and measurement

3 Description

The TPSM86325x is a simple, easy-to-use, highefficiency,

high-power density, synchronous buck

module with input voltage ranging from 3 V to 17 V

and supports up to 3-A continuous current.

The TPSM86325x 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 TPSM863252 operates in Eco-mode, which

maintains high efficiency during light loading. The

TPSM863257 operates in FCCM mode, which keeps

the same frequency and lower output ripple during

all load conditions. TPSM863253 is fixed 3.3-V output

voltage part with FCCM mode. The device integrates

complete protection through OVP, OCP, UVLO, OTP,

and UVP with hiccup.

The device is available in a QFN package. The

junction temperature is specified from –40°C to

125°C.