1 Features
• Configured for a wide range of applications
– 3.8V to 17V wide input voltage range
– Fixed 3.3V output voltage for TPSM861253
– ±1% output voltage accuracy from 0 to 65°C
– Integrated 55mΩ and 24mΩ MOSFETs
– 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
– TPSM861253 forced continuous conduction
mode (FCCM) at light loading
– Fast transient D-CAP3™ control mode
– Easy layout with integrated inductor and
feedback resistor
– 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 TPSM861253
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 TPSM861253 is a simple, easy-to-use, highefficiency,
high-power density, synchronous buck
module with input voltage ranging from 3.8V to 17V
and supports up to 1A continuous current.
The TPSM861253 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.
TPSM861253 is fixed 3.3V 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.