TPS54240-Q1_16 Datasheet, PDF (1/52 Pages) Texas Instruments – 3.5-V to 42-V STEP-DOWN SWIFT DC/DC CONVERTER WITH Eco-mode CONTROL SCHEME

TPS54240-Q1
www.ti.com
SLVSAQ4B – DECEMBER 2010 – REVISED SEPTEMBER 2013
3.5-V to 42-V STEP-DOWN SWIFT™ DC/DC CONVERTER WITH Eco-mode™ CONTROL
SCHEME
Check for Samples: TPS54240-Q1
FEATURES
1
•2 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 H2
– Device CDM ESD Classification Level C6
• 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
• 138-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
• Adjustable UVLO Voltage and Hysteresis
• 0.8-V Internal Voltage Reference
• MSOP10 PowerPAD™ Package
• Supported by SwitcherPro™ Software Tool
(http://focus.ti.com/docs/toolsw/folders/print/s
witcherpro.html)
• For SWIFT™ Documentation, See the TI Web
site at http://www.ti.com/swift
SIMPLIFIED SCHEMATIC
V_IN
VIN
PWRGD
TPS54240
EN
BOOT
SS /TR
PH
V_OUT
RT /CLK
COMP
VSENSE
GND
APPLICATIONS
• 12-V and 24-V Industrial and Commercial Low-
Power Systems
• GSM, GPRS Modules in Fleet Management, E-
Meters, and Security Systems
DESCRIPTION
The TPS54240-Q1 device is a 42-V, 2.5-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 138 μA. Using the
enable pin, shutdown supply current is reduced to 1.3
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 start-up 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 foldback and thermal shutdown protects
the part during an overload condition.
The TPS54240-Q1 is available in a 10-pin thermally
enhanced MSOP PowerPAD package.
100
90
80
70
60
50
40
30
20
10
0
0
EFFICIENCY vs LOAD CURRENT
VIN=12V
VOUT=3.3V
fsw=300kHz
0.5
1.0
1.5
2.0
2.5
3.0
I_O - Output Current - A
1
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, PowerPAD, SwitcherPro, SWIFT are trademarks of Texas Instruments.
2
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 © 2010–2013, Texas Instruments Incorporated