TPS54360_1212 Datasheet, PDF (1/43 Pages) Texas Instruments – 60 V Input, 3.5 A, Step Down DC-DC Converter with Eco-mode™

TPS54360
www.ti.com
SLVSBB4C – AUGUST 2012 – REVISED OCTOBER 2012
60 V Input, 3.5 A, Step Down DC-DC Converter with Eco-mode™
Check for Samples: TPS54360
FEATURES
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•2 4.5 V to 60 V (65 V Abs Max) Input Range
• 3.5 A Continuous Current, 4.5 A Minimum Peak
Inductor Current Limit
• Current Mode Control DC-DC Converter
• 92-mΩ High-Side MOSFET
• High Efficiency at Light Loads with Pulse
Skipping Eco-mode™
• Low Dropout at Light Loads with Integrated
BOOT Recharge FET
• 146 μA Operating Quiescent Current
• 2 μA Shutdown Current
• 100 kHz to 2.5 MHz Fixed Switching Frequency
• Synchronizes to External Clock
• Adjustable UVLO Voltage and Hysteresis
• Internal Soft-Start
• Accurate Cycle-by-Cycle Current Limit
• Thermal, Overvoltage, and Frequency
Foldback Protection
• 0.8 V 1% Internal Voltage Reference
• 8-Pin HSOIC with PowerPAD™ Package
• –40°C to 150°C T_J Operating Range
• Supported by WEBENCH™ Software Tool
APPLICATIONS
• 12 V, 24 V and 48 V Industrial, Automotive and
Communications Power Systems
DESCRIPTION
The TPS54360 is a 60 V, 3.5 A, step down regulator with an integrated high side MOSFET. The device survives
load dump pulses up to 65V per ISO 7637. Current mode control provides simple external compensation and
flexible component selection. A low ripple pulse skip mode reduces the no load supply current to 146 μA.
Shutdown supply current is reduced to 2 μA when the enable pin is pulled low.
Undervoltage lockout is internally set at 4.3 V but can be increased using the enable pin. The output voltage start
up ramp is internally controlled to provide a controlled start up and eliminate overshoot.
A wide switching frequency range allows either efficiency or external component size to be optimized. Frequency
foldback and thermal shutdown protects internal and external components during an overload condition.
The TPS54360 is available in an 8-pin thermally enhanced HSOIC PowerPAD™ package.
SIMPLIFIED SCHEMATIC
V_IN
VIN
EFFICIENCY vs LOAD CURRENT
100
90
TPS54360
EN
BOOT
RT/CLK ^SW
80
70
60
V_OUT
50
40
V_IN = 12V
30
COMP
FB
GND
20
10
V_OUT = 5V, fsw = 600 kHz
V_OUT = 3.3V, fsw = 300 kHz
0
0
0.5 1.0
1.5 2.0 2.5
3.0 3.5 4.0
I_O - Output Current - A
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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, PowerPAD, WEBENCH are trademarks of Texas Instruments.
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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