1 Features
1• D-CAP2™ Mode Enables Fast Transient
Response
• Low Output Ripple and Allows Ceramic Output
Capacitor
• Wide Input Voltage Range: 4.5 V to 18 V
• Output Voltage Range: 0.76 V to 7 V
• Highly Efficient Integrated FETs Optimized for
Lower Duty Cycle Applications
– 100 mΩ (High-Side) and 70 mΩ (Low-Side)
• High Efficiency, Less Than 10 μA at Shutdown
• High Initial Bandgap Reference Accuracy
• Adjustable Soft Start
• Pre-Biased Soft Start
• 700-kHz Switching Frequency (fSW)
• Cycle-By-Cycle Overcurrent Limit
• Auto-Skip Eco-Mode™ for High Efficiency at Light
Load

2 Applications
• Wide Range of Applications for Low Voltage
Systems
– Digital TV Power Supplies
– High Definition Blu-ray Disc™ Players
– Networking Home Terminals
– Digital Set Top Boxes (STB)

3 Description
The TPS54328 is an adaptive on-time D-CAP2™
mode synchronous buck converter. The TPS54328
enables system designers to complete the suite of
various end-equipment power bus regulators with a
cost effective, low component count, low standby
current solution. The main control loop for the
TPS54328 uses the D-CAP2 mode control that
provides a fast transient response with no external
compensation components.
The adaptive on-time control supports seamless
transition between PWM mode at higher load
conditions and Eco-mode operation at light loads.
Eco-mode allows the TPS54328 to maintain high
efficiency during lighter load conditions. The
TPS54328 also has a proprietary circuit that enables
the device to adopt to both low equivalent series
resistance (ESR) output capacitors, such as
POSCAP or SP-CAP, and ultra-low ESR ceramic
capacitors. The device operates from 4.5-V to 18-V
input (VIN).
The output voltage can be programmed from 0.76 V
to 7 V. The device also features an adjustable soft
start time. The TPS54328 is available in 8-pin DDA
and 10-pin DRC packages, and is designed to
operate over the ambient temperature range of –40°C
to 85°C.