TPS57040-Q1_15 Datasheet, PDF (1/51 Pages) Texas Instruments – TPS57040-Q1 0.5-A 42-V Step-Down DC-DC Converter With Eco-mode™

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TPS57040-Q1
SLVSAP4D – DECEMBER 2010 – REVISED DECEMBER 2014
TPS57040-Q1 0.5-A 42-V Step-Down DC-DC Converter With Eco-mode™
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results
– Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
– 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 a 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/Sequencing
• Undervoltage and Overvoltage Power-good
Output
• Adjustable Undervoltage Lockout 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)
2 Applications
• 12-V Automotive Power Systems
• Automotive Body Electronics
• Passive Safety: Brake System & Airbags
• 12-V and 24-V Industrial Low Power Systems
• Aftermarket Auto Accessories: Video, GPS,
Entertainment
3 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).
PART NUMBER
TPS57040-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
TPS57040-Q1
EN
BOOT
SS /TR
RT /CLK
COMP
PH
VSENSE
GND
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.