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
– 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 solution size
– TPSM863252 Eco-mode, TPSM863257 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. 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.