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.