Datasheet Texas Instruments TPS54429EPWP — 数据表

TPS54429E
SLVSAS0 – FEBRUARY 2011 www.ti.com 7V to 18V Input, 4.5-A Synchronous Step-Down SWIFT™ Converter with Eco-Mode™
Check for Samples: TPS54429E FEATURES DESCRIPTION The TPS54429E is an adaptive on-time D-CAP2в„ў
mode synchronous buck converter. The TPS54429E
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
TPS54429E uses the D-CAP2в„ў mode control which
provides a very 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 TPS54429E to maintain high efficiency
during lighter load conditions. The TPS54429E also
has a proprietary circuit that enables the device to
adopt to both low equivalent series resistance (ESR)
output capacitors, such as POSCAP, SP-CAP, and
ultra-low ESR ceramic capacitors. The device
operates from 7-V to 18-V VIN input. The output
voltage can be programmed between 0.76V and
5.5V. The device also features an adjustable soft …