TPS57140-Q1_16 Datasheet, PDF (1/53 Pages) Texas Instruments – Step-Down DC-DC Converter

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TPS57140-Q1
SLVSAP3D – DECEMBER 2010 – REVISED FEBRUARY 2016
TPS57140-Q1 1.5-A 42-V Step-Down DC-DC Converter With Eco-mode™ Control
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified with the Following Results:
– Device Temperature Grade 1: –40°C to
+125°C
– Device HBM ESD Classification Level 2
– Device CDM ESD Classification Level C4B
• 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 Voltage and
Hysteresis
• 0.8-V Internal Voltage Reference
• Supported by SwitcherPro™ Software Tool
(www.ti.com/tool/switcherpro)
2 Applications
• 12-V and 24-V Industrial and Commercial Low-
Power Systems
• Automotive Infotainment, Head Unit, Display
Navigation, Audio and Clusters
• Automotive Body Applications, HVAC, Wireless
Charging
• Advanced Driver-Assistance System (ADAS),
Rear-View Camera Module, Blind Spot Radar
• Industrial DC Power Systems
3 Description
The TPS57140-Q1 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. When the
enable pin is in the low state, the shutdown current is
reduced to 1.5 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 or
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 optimization
of efficiency and external component size. Frequency
foldback and thermal shutdown protect the part
during an overload condition.
The TPS57140-Q1 is available in a 10-pin thermally
enhanced MSOP-PowerPAD™ package (DGQ) and
a 10-pin VSON package (DRC).
PART
NUMBER
TPS57140-Q1
Device Information⁽¹⁾
PACKAGE
BODY SIZE (NOM)
MSOP-PowerPAD (10) 3.00 mm × 3.00 mm
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-Q1
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.