TPS53353 Datasheet, PDF (1/29 Pages) Texas Instruments – High-Efficiency 20-A Synchronous Buck Converter with Eco-mode™

TPS53353
www.ti.com
SLUSAK2 – AUGUST 2011
High-Efficiency 20-A Synchronous Buck Converter with Eco-mode™
Check for Samples: TPS53353
FEATURES
1
•2 Conversion Input Voltage Range: 3 V to 15 V
• VDD Input Voltage Range: 4.5 V to 25 V
• 92% efficiency from 12 V to 1.5 V at 20 A
• Output Voltage Range: 0.6 V to 5.5 V
• 5-V LDO Output
• Supports Single Rail Input
• Integrated Power MOSFETs with 20-A of
Continuous Output Current
• Auto-Skip Eco-mode™ for Light-Load
Efficiency
• <10 μA Shut Down Current
• D-CAP™ Mode with Fast Transient Response
• Selectable Switching Frequency from 250 kHz
to 1 MHz with External Resistor
• Selectable Auto-Skip or PWM-Only Operation
• Built-in 1% 0.6-V Reference.
• 0.7-ms, 1.4-ms, 2.8-ms and 5.6-ms Selectable
Internal Voltage Servo Soft-Start
• Integrated Boost Switch
• Pre-Charged Start-up Capability
• Adjustable Overcurrent Limit with Thermal
Compensation
• Overvoltage, Undervoltage, UVLO and
Over-Temperature Protection
• Supports All Ceramic Output Capacitors
• Open-Drain Power Good Indication
• Incorporates NexFET™ Power Block
Technology
• 22-pin QFN Package with PowerPAD™
APPLICATIONS
• Server/Storage
• Workstations and Desktops
• Telecommunications Infrastructure
DESCRIPTION
TPS53353 is a D-CAP™ mode, 20-A synchronous
switcher with integrated MOSFETs. It is designed for
ease of use, low external component count, and
space-conscious power systems.
This device features 5.5-mΩ / 2.2-mΩ integrated
MOSFETs, accurate 1%, 0.6-V reference, and
integrated boost switch. A sample of competitive
features include: 3-V to 15-V wide conversion input
voltage range, very low external component count,
D-CAP™ mode control for super fast transient,
auto-skip mode operation, internal soft-start control,
selectable frequency, and no need for compensation.
The conversion input voltage ranges from 3 V to
15 V, the supply voltage range is from 4.5 V to 25 V,
and the output voltage range is from 0.6 V to 5.5 V.
The device is available in 5 mm x 6 mm, 22-pin QFN
package and is specified from –40°C to 85°C.
SIMPLIFIED APPLICATION
V_VDD
VIN
22 21 20 19 18 17 16 15 14 13 12
VREG
TPS53353
GND
PGOOD
EN
1 2 3 4 5 6 7 8 9 10 11
V_OUT
UDG-11047
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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.
Eco-mode, NexFET, PowerPAD are trademarks of Texas Instruments.
2
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