TPS57040-Q1
www.ti.com
SLVSAP4B –DECEMBER 2010–REVISED AUGUST 2012
0.5-A 42-V STEP-DOWN SWIFT™ DC/DC CONVERTER WITH Eco-mode™
Check for Samples: TPS57040-Q1
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FEATURES
2
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Qualified for Automotive Applications
3.5-V to 42-V Input Voltage Range
200-mΩ High-Side MOSFET
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Adjustable Undervoltage Lockout Voltage and
Hysteresis
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0.8-V Internal Voltage Reference
Supported by SwitcherPro™ Software Tool
(http://focus.ti.com/docs/toolsw/folders/print/s
witcherpro.html)
High Efficiency at Light Loads with a Pulse
Skipping Eco-mode™ Control Scheme
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•
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116-μA Operating Quiescent Current
1.5-μA Shutdown Current
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For SWIFT™ Documentation, See the TI
Website at http://www.ti.com/swift
100-kHz to 2.5-MHz Switching Frequency
Synchronizes to External Clock
Adjustable Slow Start/Sequencing
APPLICATIONS
•
12-V and 24-V Industrial and Commercial Low
Power Systems
Undervoltage and Overvoltage Power-good
Output
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Aftermarket Auto Accessories: Video, GPS,
Entertainment
DESCRIPTION
The TPS57040-Q1 device is a 42-V 0.5-A step-down regulator with an integrated high-side MOSFET. Current
mode control provides simple external compensation and flexible component selection. A low-ripple pulse-skip
mode reduces the no load, input supply current to 116 μA. Using the enable pin, shutdown supply current is
reduced to 1.5 μA, when the enable pin is low.
Undervoltage lockout is internally set at 2.5 V, but can be increased using the enable pin. The output voltage
startup ramp is controlled by the slow start pin that can also be configured for sequencing/tracking. An open
drain power-good signal indicates the output is within 92% to 109% of its nominal voltage.
A wide switching frequency range allows efficiency and external component size to be optimized. Frequency fold
back and thermal shutdown protects the part during an overload condition.
The TPS57040-Q1 is available in a 10-pin thermally enhanced MSOP PowerPAD™ package (DGQ) and a 10-
pin SON package (DRC).
SIMPLIFIED SCHEMATIC
EFFICIENCY
vs
LOAD CURRENT
VIN
PWRGD
100
90
TPS57040-Q1
80
70
60
50
EN
BOOT
PH
40
SS/TR
RT/CLK
COMP
30
20
VI = 12 V,
VO = 5.0 V,
fsw = 700 kHz
VSENSE
GND
10
0
0
0.1
0.2
0.3
0.4
0.5
Load 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, SwitcherPro, SWIFT, PowerPAD 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 © 2010–2012, Texas Instruments Incorporated