TPS54225-Q1 Datasheet, PDF (1/22 Pages) Texas Instruments – 4.5V to 18V Input, 2-A Synchronous Step-Down SWIFTTM Converter

TPS54225-Q1
www.ti.com
SLVSAV9 – JUNE 2011
4.5V to 18V Input, 2-A Synchronous Step-Down SWIFT^TM Converter
Check for Samples: TPS54225-Q1
FEATURES
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•23 Qualified for Automotive Applications
• D-CAP2™ Mode Enables Fast Transient
Response
• Low Output Ripple and Allows Ceramic Output
Capacitor
• Wide V_CC Input Voltage Range: 4.5 V to 18 V
• Wide V_IN Input Voltage Range: 2 V to 18 V
• Output Voltage Range: 0.76 V to 5.5 V
• Highly Efficient Integrated FET’s Optimized
for Lower Duty Cycle Applications
- 160 mΩ (High Side) and 110 mΩ (Low Side)
• High Efficiency, less than 10 μA at shutdown
• High Initial Bandgap Reference Accuracy
• Adjustable Soft Start
• Pre-Biased Soft Start
• 700-kHz Switching Frequency (f_SW)
• Cycle-By-Cycle Overcurrent Limit
• 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)
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DESCRIPTION
The TPS54225-Q1 is an adaptive on-time D-CAP2™
mode synchronous buck converter. The
TPS54225-Q1 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 TPS54225-Q1 uses the D-CAP2™ mode
control which provides a fast transient response with
no external compensation components.
The TPS54225-Q1 also has a proprietary circuit that
enables the device to adapt to both low equivalent
series resistance (ESR) output capacitors, such as
POSCAP or SP-CAP, and ultra-low ESR ceramic
capacitors. The device operates from 4.5-V to 18-V
V_CC input , and from 2-V to 18-V VIN input power
supply voltage. The output voltage can be
programmed between 0.76 V and 5.5 V. The device
also features an adjustable slow start time and a
power good function. The TPS54225-Q1 is available
in the 14 pin HTSSOP package, and designed to
operate from –40°C to 85°C.
V_OUT (50 mV/div)
100 ms/div
I_OUT (1 A/div)
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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.
D-CAP2, PowerPAD are trademarks of Texas Instruments.
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Blu-ray Disc is a trademark of Blu-ray Disc Association.
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011, Texas Instruments Incorporated