1FEATURES
23• 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 V to 18 V
• Output Voltage Range: 0.76 V to 5.5 V
• Highly Efficient Integrated FET’s Optimized
for Lower Duty Cycle Applications
– 160 mΩ (High Side) and 110 mΩ (Low Side)
• High Efficiency, less than 10 μA at shutdown
• Auto-Skip Eco-Mode™ for High Efficiency at
Light Load
• 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
• Auto-Skip Mode

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)

DESCRIPTION
The TPS54226 is a adaptive on-time D-CAP2™
mode synchronous buck converter. TheTPS54226
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
TPS54226 uses the D-CAP2™ mode control which
provides a fast transient response with no external compensation components. The adoptive on-time
control supports seamless operation between PWM
mode at heavy load condition and reduced frequency
Eco-Mode™ operation at light load for high efficiency.
The TPS54226 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
VCC input, and from 2-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 TPS54226 is available in
the 14 pin HTSSOP or 16 pin QFN package, and
designed to operate from –40°C to 85°C.