The TPS54228 device 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 SO
, 8-pin SOIC, and 10-pin VSON packages, and is designed to
operate over the ambient temperature range of –40°C to 85°C.
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