TPS53353_15 Datasheet, PDF (1/37 Pages) Texas Instruments – TPS53353 High-Efficiency 20-A Synchronous Buck Converter With Eco-mode™

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TPS53353
SLUSAK2B – AUGUST 2011 – REVISED FEBRUARY 2015
TPS53353 High-Efficiency 20-A Synchronous Buck Converter With Eco-mode™
1 Features
•1 Conversion Input Voltage Range: 1.5 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 Shutdown 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
• Precharged Start-up Capability
• Adjustable Overcurrent Limit With Thermal
Compensation
• Overvoltage, Undervoltage, UVLO and
Overtemperature Protection
• Supports All Ceramic Output Capacitors
• Open-Drain Power-Good Indication
• Incorporates NexFET™ Power Block Technology
• 22-Pin QFN Package With PowerPAD™
2 Applications
• Server/Storage
• Workstations and Desktops
• Telecommunications Infrastructure
3 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: a conversion input voltage range
from 1.5 V to 15 V, 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 1.5 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 × 6-mm, 22-pin QFN
package and is specified from –40°C to 85°C.
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
TPS53353
LSON-CLIP (22)
6.00 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Application
VVDD
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
VOUT
UDG-11047
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.