TPS54526 Datasheet, PDF (1/28 Pages) Texas Instruments – 4.5V to 18V Input, 5.5-A Synchronous Step-Down Converter with Eco-Mode™

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TPS54526
SLVSB84 – MAY 2012
4.5V to 18V Input, 5.5-A Synchronous Step-Down Converter with Eco-Mode™
Check for Samples: TPS54526
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
– 63 mΩ (High Side) and 33 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
• Auto-Skip Eco-mode™ for High Efficiency at
Light Load
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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TPS54526PWP
DESCRIPTION
The TPS54526 is an adaptive on-time D-CAP2™
mode synchronous buck converter. The TPS54526
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
TPS54526 uses the D-CAP2™ 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-
mode™ operation at light loads. Eco-mode™ allows
the TPS54526 to maintain high efficiency during
lighter load conditions. The TPS54526 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 0.76V and 5.5V. The device
also features an adjustable soft start time and a
power good function. The TPS54526 is available in
the 14-pin HTSSOP package and the 16 pin QFN
package, designed to operate from –40°C to 85°C.
V_O (50 mV/div ac coupled)
I_OUT (2A/div)
Slew Rate (0.35A/µsec)
Time Scale (100µsec/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, Eco-mode, 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 © 2012, Texas Instruments Incorporated