TPS54239E
www.ti.com SLVSBT1 – JANUARY 2013 4.5V to 23V Input, 2-A Synchronous Step-Down SWIFT™ Converter With Eco-mode™
Check for Samples: TPS54239E FEATURES DESCRIPTION The TPS54239E is an adaptive on-time D-CAP2в„ў
mode synchronous buck converter. The TPS54239E
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
TPS54239E uses the D-CAP2в„ў 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-modeв„ў
operation at light loads. Eco-modeв„ў allows the
TPS54239 to maintain high efficiency during lighter
load conditions. The TPS54239E 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 ultralow ESR ceramic capacitors. The device operates
from 4.5-V to 23-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
TPS54239E is available in the 8-pin DDA package, …
