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.