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TPS54540DDAR
42 V, 5 A, Step-Down DC-DC Converter with Eco-Mode
0.5 1 1.5 2 4 4.5ficien Output V to5V V to 3.3 V V to12V = 12 V, sw = 800 kHzOUT f = 5 V and 3.3 V, sw = 400 kHzOUT f
VIN
GND
COMP
VIN 92-mΩ High-Side MOSFET 146 μA Operating Quiescent Current and μA Shutdown Current 100 kHzto 2.5 MHz Fixed Switching Frequency Synchronizesto External Clock Low Dropoutat Light Loads with Integrated BOOT
Recharge FET Adjustable UVLO Voltage and Hysteresis 0.8V 1% Internal Voltage Reference 8-Terminal HSOP with PowerPAD™ Package –40°Cto 150°CTJ Operating Range Createa
the WEBENCH®
Applications Industrial Automation Vehicle Accessories: USB Dedicated
Chargers 12V and24
Communications
survives load dump 7637.
Current mode
compensation andA
low ripple pulse load
supply currentto μA. Shutdown supply currentis
reducedto2μA the enable pinis pulled low.
Undervoltage lockoutis internally setat 4.3V but can increased using enable pin. The output voltage
start up ramp controlledto providea
controlled start eliminate overshoot. wide switching range allows either
efficiencyor sizetobe optimized.
Output current cycle-by-cycle. Frequency shutdown protects internal and duringan overload condition.in an 8-terminal thermally package.
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Simplifiedvs Load Current
