Datasheet Texas Instruments TPS54426RSAR — 数据表

TPS54426
SLVSAD6C – AUGUST 2010 – REVISED JULY 2011 www.ti.com 4.5V to 18V Input, 4-A Synchronous Step-Down SWIFT™ Converter with Eco-Mode™
Check for Samples: TPS54426 FEATURES DESCRIPTION The TPS54426 is an adaptive on-time D-CAP2в„ў
mode synchronous buck converter. The TPS54426
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
TPS54426 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 TPS54426 to maintain high efficiency
during lighter load conditions. The TPS54426 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 4.5-V to 18-V VIN input. The output
voltage can be programmed between 0.76 V and 5.5
V. The device also features an adjustable soft start …