Datasheet
V (50mV/div)
OUT
I (1 A/div)
OUT
100 s/divm
TPS54225
www.ti.com
SLVSA15C –OCTOBER 2009– REVISED FEBRUARY 2011
4.5V to 18V Input, 2-A Synchronous Step-Down SWIFT
TM
Converter
Check for Samples: TPS54225
1
FEATURES
DESCRIPTION
23
• D-CAP2™ Mode Enables Fast Transient
Response
The TPS54225 is an adaptive on-time D-CAP2™
mode synchronous buck converter. The TPS54225
• Low Output Ripple and Allows Ceramic Output
enables system designers to complete the suite of
Capacitor
various end equipment’s power bus regulators with a
• Wide V
CC
Input Voltage Range: 4.5 V to 18 V
cost effective, low component count, low standby
• Wide V
IN
Input Voltage Range: 2 V to 18 V
current solution. The main control loop for the
TPS54225 uses the D-CAP2™ mode control which
• Output Voltage Range: 0.76 V to 5.5 V
provides a fast transient response with no external
• Highly Efficient Integrated FET’s Optimized
compensation components.
for Lower Duty Cycle Applications
The TPS54225 also has a proprietary circuit that
- 160 mΩ (High Side) and 110 mΩ (Low Side)
enables the device to adapt to both low equivalent
• High Efficiency, less than 10 μA at shutdown
series resistance (ESR) output capacitors, such as
• High Initial Bandgap Reference Accuracy
POSCAP or SP-CAP, and ultra-low ESR ceramic
• Adjustable Soft Start
capacitors. The device operates from 4.5-V to 18-V
V
CC
input , and from 2-V to 18-V VIN input power
• Pre-Biased Soft Start
supply voltage. The output voltage can be
• 700-kHz Switching Frequency (f
SW
)
programmed between 0.76 V and 5.5 V. The device
• Cycle-By-Cycle Overcurrent Limit
also features an adjustable slow start time and a
power good function. The TPS54225 is available in
• Power Good Output
the 14 pin HTSSOP package, and designed to
operate from –40°C to 85°C.
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)
space
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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.
2D-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.
© 2009–2011, 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.