1 Features

• 2.25-V to 5.5-V input voltage range

• 0.5-V to 4.5-V adjustable output voltage

• 1 FB voltage accuracy (–40°C to 125°C TJ)

• 2.0-MHz switching frequency

• 35-mΩ and 18-mΩ internal power MOSFETs

• DCS-Control topology

• Optimized EMI performance

• Facilitates CISPR 11/32 compliance

– Integrated on-chip noise-filtering capacitors

– Measurements according to CISPR available

• Excellent transient response

• MODE pin for conduction mode selection

• Supports 1.2-V GPIO

• 100 duty cycle for lowest dropout

• Active output discharge

• Power-good output

• Thermal shutdown protection

• Hiccup or latch-off OCP/OVP

• PSpice and SIMPLIS models available

• Create a custom design using the TPS628303 with

WEBENCH® Power Designer

2 Applications

• Solid state drive

• Portable electronics

• Analog security and IP network cameras

• Industrial PC

• Factory automation and control

• ASIC, SoC, and MCU supply

• Generic point of load

3 Description

The TPS628303 is an easy-to-use synchronous stepdown

DC-DC converters family with low quiescent

current. Based on the DCS-Control topology,

TPS628303 provides a fast transient response with

small output capacitance. The internal reference

allows to regulate the output voltage down to 0.5 V

with a high feedback voltage accuracy of 1 over the

junction temperature range of –40°C to 125°C. The

family is available in two packages and each package

devices are pin-to-pin compatible.

The TPS628303 has a MODE pin to control

the device mode of operation. Power save mode

maintains high efficiency down to very light loads for

extending the system battery run-time. Forced-PWM

mode maintains a continuous conduction mode to

ensure the least ripple in the output voltage and a

quasi-fixed switching frequency. The device features a

Power-Good signal and a well-controlled internal soft

start circuit. TPS628303 is able to operate in 100

mode. For fault protection, TPS628303 incorporates

a HICCUP short-circuit protection as well as a

thermal shutdown. One device option has a latch-off

protection for short circuit as well as overvoltage

incidents. The family is available in two packages:

an 8-pin 1.0-mm × 2.0-mm QFN package, offering

the highest power density solution, and an 8-pin 1.6-

mm × 2.1-mm SOT583 package, offering an easy-toassemble

solutions.