1FEATURES

23• D-CAP2™ Mode Enables Fast Transient

Response

• Low Output Ripple and Allows Ceramic Output

Capacitor

• Wide VIN Input Voltage Range: 4.5 V to 18 V

• Output Voltage Range: 0.76 V to 7.0 V

• Highly Efficient Integrated FETs Optimized

for Lower Duty Cycle Applications

– 160 mΩ (High Side) and 110 mΩ (Low Side)

• High Efficiency, less than 10 μA at shutdown

• High Initial Bandgap Reference Accuracy

• Adjustable Soft Start

• Pre-Biased Soft Start

• 650-kHz Switching Frequency (f SW)

• Cycle By Cycle Over Current Limit

• Auto-Skip Eco-mode™ for High Efficiency at

Light Load

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 TPS54229E is an adaptive on-time D-CAP2™

mode synchronous buck converter. The TPS54229E

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

TPS54229E 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

TPS54229E to maintain high efficiency during lighter load conditions. The TPS54229E 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 VIN input. The output voltage can

be programmed between 0.76 V and 7 V. The device

also features an adjustable soft start time. The

TPS54229E is available in the 8-pin DDA package,

and designed to operate from –40°C to 85°C.