TPS54140A_15 Datasheet, PDF (1/58 Pages) Texas Instruments – TPS54140A 1.5-A, 42-V Step-Down DC/DC Converter with Eco-mode™

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TPS54140A
SLVSB55C – MAY 2012 – REVISED OCTOBER 2015
TPS54140A 1.5-A, 42-V Step-Down DC/DC Converter with Eco-mode™
1 Features
•1 3.5-V to 42-V Input Voltage Range
• 200-mΩ High-Side MOSFET
• High Efficiency at Light Loads with a Pulse
Skipping Eco-mode™
• Tighter Enable Threshold than TPS54140 for
More Accurate UVLO Voltage
• Adjustable UVLO Voltage and Hysteresis
• 116-μA Operating Quiescent Current
• 1.3-μA Shutdown Current
• 100-kHz to 2.5-MHz Switching Frequency
• Synchronizes to External Clock
• Adjustable Slow Start/Sequencing
• UV and OV Power Good Output
• 0.8-V Internal Voltage Reference
• MSOP10 and 3-mm × 3-mm VSON-10 Package
With PowerPAD™
• Supported by WEBENCH^® and SwitcherPro™
Software Tool
2 Applications
• 12-V and 24-V Industrial and Commercial Low
Power Systems
• Aftermarket Auto Accessories: Video, GPS,
Entertainment
SPACE
Simplified Schematic
V_IN
VIN
PWRGD
TPS54140A
BOOT
EN
SS /TR
PH
RT /CLK
COMP
VSENSE
V_OUT
GND
3 Description
The TPS54140A device is a 42-V, 1.5-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,
regulated output supply current to 116 μA. Using the
enable pin, shutdown supply current is reduced to 1.3
μA.
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 94% to 107% 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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS54140A
VSON (10)
MSOP (10)
3.00 mm × 3.00 mm
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Efficiency vs Load Current
90
85
80
75
70
65
60
V_I = 12 V,
V_O = 3.3 V,
55
f_sw = 1200 kHz
50
0 0.25 0.50 0.75 1 1.25 1.50 1.75 2
Load Current - A
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.