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.