TPS56528 Datasheet, PDF (1/23 Pages) Texas Instruments – 4.5V to 18V Input, 5-A Synchronous Step-Down Converter with Advanced Eco-mode™

TPS56528
www.ti.com
SLVSBV3A – APRIL 2013 – REVISED APRIL 2013
4.5V to 18V Input, 5-A Synchronous Step-Down Converter with Advanced Eco-mode™
Check for Samples: TPS56528
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: 0.6 V to 7 V
• Highly Efficient Integrated FETs Optimized
for Lower Duty Cycle Applications
–68 mΩ (High Side) and 37 mΩ (Low Side)
• High Efficiency, less than 10 μA at Shutdown
• High Initial Bandgap Reference Accuracy
• Pre-Biased Soft Start
• 650-kHz Switching Frequency (f_SW)
• Cycle By Cycle Over Current Limit
• Advanced Auto-Skip Eco-mode™ for High
Efficiency at Light Load
• Power Good Output
• Fixed Soft Start : 1.0ms
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)
DESCRIPTION
The TPS56528 is an adaptive on-time D-CAP2™
mode synchronous buck converter. The TPS56528
enables system designers to complete the suite of
various end-equipment power bus regulators with a
cost effective, low component count, low standby
current solution. The main control loop for the
TPS56528 uses the D-CAP2™ mode control that
provides a fast transient response with no external
compensation components. The adaptive on-time
control supports seamless transition between PWM
mode at higher load conditions and advanced Eco-
mode™ operation at light loads. Advanced Eco-
mode™ allows the TPS56528 to maintain high
efficiency during lighter load conditions. The
TPS56528 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 0.6 V and 7 V. The device also features a
fixed 1.0 msec soft start time and power good output.
The TPS56528 is available in the 8-pin DDA
package, and designed to operate from –40°C to
85°C.
TPS56528
Vout( 50mV/div)
Iout( 2A/div)
100us/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, advanced Eco-mode 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