TPS57140-EP_15 Datasheet, PDF (1/51 Pages) Texas Instruments – TPS57140-EP 1.5-A 42-V Step-Down Swift™ DC-DC Converter With Eco-mode™ Control

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TPS57140-EP
SLVSD01A – SEPTEMBER 2015 – REVISED SEPTEMBER 2015
TPS57140-EP 1.5-A 42-V Step-Down Swift™ DC-DC Converter With Eco-mode™ Control
1 Features
•1 3.5-V to 42-V Input Voltage Range
• 200-mΩ High-Side MOSFET
• High Efficiency at Light Loads With Pulse-
Skipping Eco-mode™ Control Scheme
• 116-μA Operating Quiescent Current
• 1.5-μA Shutdown Current
• 100-kHz to 2.5-MHz Switching Frequency
• Synchronizes to External Clock
• Adjustable Slow Start and Sequencing
• Undervoltage and Overvoltage Power-Good
Output
• Adjustable Undervoltage Lockout (UVLO) Voltage
and Hysteresis
• 0.8-V Internal Voltage Reference
• Supported by SwitcherPro™ Software Tool
(http://focus.ti.com/docs/toolsw/folders/print/switch
erpro.html)
• For SWIFT™ Documentation, See the TI Website
at http://www.ti.com/swift
• Supports Defense, Aerospace, and Medical
Applications
– Controlled Baseline
– One Assembly and Test Site
– One Fabrication Site
– Available in Military (–55°C to 125°C)
Temperature Range
– Extended Product Life Cycle
– Extended Product-Change Notification
– Product Traceability
2 Applications
• 12-V and 24-V Industrial and Commercial Low-
Power Systems
• Aftermarket Automotive Accessories: Video, GPS,
Entertainment
3 Description
The TPS57140-EP 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 reduces the shutdown supply current to
1.5 μA.
UVLO is internally set at 2.5 V, but can be increased
using the enable pin. The slow-start pin, which is also
configurable for sequencing or tracking, controls the
output voltage start-up ramp. An open-drain power-
good signal indicates the output is within 92% to
109% of its nominal voltage.
A wide switching-frequency range allows optimization
of efficiency and external component size. Frequency
foldback and thermal shutdown protect the part
during an overload condition.
The TPS57140-EP is available in a 10-pin VSON
package (DRC).
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS57140-EP
VSON (10)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
VIN
PWRGD
TPS57140-EP
EN
SS/TR
RT/CLK
COMP
BOOT
PH
VSENSE
GND
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.