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Vout (50 mV/div)
Iout (2A/div)
100 s/divm
TPS54425
www.ti.com
SLVSA84C –AUGUST 2010– REVISED JULY 2011
4-A OUTPUT SINGLE SYNCHRONOUS STEP DOWN SWITCHER
WITH INTEGRATED FET ( SWIFT™)
Check for Samples: TPS54425
1
FEATURES
DESCRIPTION
The TPS54425 is an adaptive on-time D-CAP2™
23
• D-CAP2™ Mode Enables Fast Transient
mode synchronous buck converter. The TPS54425
Response
enables system designers to complete the suite of
• Low Output Ripple and Allows Ceramic Output
various end equipment’s power bus regulators with a
Capacitor
cost effective, low component count, low standby
current solution. The main control loop for the
• Wide V
IN
Input Voltage Range: 4.5 V to 18 V
TPS54425 uses the D-CAP2™ mode control which
• Output Voltage Range: 0.76 V to 5.5 V
provides a very fast transient response with no
• Highly Efficient Integrated FET’s Optimized
external compensation components. The TPS54425
for Lower Duty Cycle Applications
also has a proprietary circuit that enables the device
– 65 mΩ (High Side) and 55 mΩ (Low Side)
to adopt to both low equivalent series resistance
(ESR) output capacitors, such as POSCAP or
• High Efficiency, less than 10 μA at shutdown
SP-CAP, and ultra-low ESR ceramic capacitors. The
• High Initial Bandgap Reference Accuracy
device operates from 4.5-V to 18-V VIN input. The
• Adjustable Soft Start
output voltage can be programmed between 0.76 V
and 5.5 V. The device also features an adjustable
• Pre-Biased Soft Start
soft start time and a power good function. The
• 700-kHz Switching Frequency (f
SW
)
TPS54425 is available in the 14-pin HTSSOP
• Cycle By Cycle Over Current Limit
package, and designed to operate from –40°C to
85°C.
• Power Good Output
APPLICATIONS
• Wide Range of Applications for Low Voltage
System
– Digital TV Power Supply
– High Definition Blu-ray Disc™ Players
– Networking Home Terminal
– Digital Set Top Box (STB)
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2SWIFT, D-CAP2, PowerPAD are trademarks of Texas Instruments.
3Blu-ray Disc is a trademark of Blu-ray Disc Association.
PRODUCTION DATA information is current as of publication date.
Copyright © 2010–2011, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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