Conv DC-DC Single Step Down 4.5Vto 18V 10-Pin VSON T/R

The TPS54228 is an adaptive on-time D-CAP2 mode synchronous buck converter. The TPS54228 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 TPS54228 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 TPS54228 to maintain high efficiency during lighter load conditions. The TPS54228 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 TPS54228 is available in 8-pin DDA , 8-pin D, and 10 pin DRC packages, and is designed to operate over the ambient temperature range of –40°C to 85°C.

D-CAP2 Mode Enables Fast Transient Response

Low Output Ripple and Allows Ceramic Output Capacitor

Wide V_IN 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
– 155 mO (High Side) and 108 m? (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 (f_SW)

Cycle By Cycle Over Current Limit

Auto-Skip Eco-mode for High Efficiency at Light Load