1 Features
1• D-CAP2™ Mode Enables Fast Transient
Response
• Low Output Ripple and Allows Ceramic Output
Capacitor
• Wide VCC Input Voltage Range: 4.5 V to 18 V
• Wide VIN Input Voltage Range: 2.0 V to 18 V D•
Output Voltage Range: 0.76 V to 5.5 V
• Highly Efficient Integrated FET’s Optimized for
Lower Duty Cycle Applications – 120 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 Over Current Limit
• Power Good Output

2 Applications
• Wide Range of Applications for Low Voltage
System
– Digital TV Power Supply
– High Definition Blu-ray Disc™ Players
– Networking Home Terminal
– Digital Set Top Box (STB)

3 Description
The TPS54325 device is an adaptive on-time D-
CAP2™ mode synchronous buck converter. The
TPS54325 device enables system designers to
complete the suite of various end equipment’s power
bus regulators with a cost effective, low component
count, low standby current solution.
The main control loop for the TPS54325 uses the D•
CAP2™ mode control which provides a very fast
transient response with no external components. The
TPS54325 also has a proprietary circuit that enables
the device to adapt 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
VCC input , and from 2.0-V to 18-V VIN input power supply voltage. The output voltage can be
programmed between 0.76 V and 5.5 V. The device
also features an adjustable slow start time and a
power good function. The TPS54325 is available in
the 14 pin HTSSOP package, and designed to operate from –40°C to 85°C.