TPS54625 Datasheet, PDF (1/22 Pages) Texas Instruments – 4.5V to 18V Input, 6.5-A Synchronous Step-Down Converter

TPS54625
www.ti.com
SLVSC33 – AUGUST 2013
4.5V to 18V Input, 6.5-A Synchronous Step-Down Converter
Check for Samples: TPS54625
FEATURES
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•23 D-CAP2™ Mode Enables Fast Transient
Response
• Low Output Ripple and Allows Ceramic Output
Capacitor
• Wide V_IN Input Voltage Range: 4.5 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 –36 mΩ (High
Side) and 28 mΩ (Low Side)
• High Efficiency, less than 10 μA at shutdown
• High Initial Bandgap Reference Accuracy
• Adjustable Soft Start
• Pre-Biased Soft Start
• 650-kHz Switching Frequency (f_SW)
• Cycle By Cycle Over Current 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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TPS54625
DESCRIPTION
The TPS54625 is an adaptive on-time D-CAP2™
mode synchronous buck converter. The TPS54625
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 TPS54625 uses the D-
CAP2™ mode control which provides a very fast
transient response with no external compensation
components. The TPS54625 also has a proprietary
circuit that enables the device to adopt 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 VIN input. The output voltage can be
programmed between 0.76 V and 5.5 V. The device
also features an adjustable soft start time and a
power good function. The TPS54625 is available in
the 14-pin HTSSOP package, and designed to
operate from –40°C to 85°C.
Io = 0 A –6.5 A
S/R = 0.35 A/μs
Vo (50 mV/div)
Io (2 A/div)
Time (100 μs/div)
L004_SLVSC33
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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 © 2013, Texas Instruments Incorporated