1 Features
• Configured for a wide range of applications
– 3V to 17V input voltage range
– 0.6V to 10V output voltage range for
TPSM863252
– 0.6V to 5.5V output voltage range for
TPSM863257
– Fixed 3.3V output voltage for TPSM863253
– 0.6V reference voltage
– ±1% reference accuracy at 25°C
– ±1.5% reference accuracy at –40°C to 125°C
– Integrated 55mΩ and 24mΩ MOSFETs
– 100μA low quiescent current
– 1.2MHz switching frequency
– Maximum 95% large duty cycle operation
– Precision EN threshold voltage
– 1.6ms fixed typical soft-start time
• Ease of use and small design size
– TPSM863252 Eco-mode, TPSM863257 and
TPSM863253 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
– Non-latch for OV, OT, and UVLO 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 TPSM863252
with the WEBENCH® Power Designer
• Create a custom design using the TPSM863253
with the WEBENCH® Power Designer
• Create a custom design using the TPSM863257
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 TPSM86325x 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 3A 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 a fixed 3.3V
output voltage part with FCCM mode. TPS863253
integrated divider resistors and a feedforward cap
in internal module. 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.