TPS54260 Datasheet, PDF (1/45 Pages) Texas Instruments – 3.5V to 60V INPUT, 2.5A, STEP DOWN CONVERTER WITH ECO-MODE™

TPS54260
www.ti.com
SLVSA86 – MARCH 2010
3.5V to 60V INPUT, 2.5A, STEP DOWN CONVERTER WITH ECO-MODE™
Check for Samples: TPS54260
FEATURES
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•2 3.5V to 60V Input Voltage Range
• 200-mΩ High-Side MOSFET
• High Efficiency at Light Loads with a Pulse
Skipping Eco-Mode™
• 138mA Operating Quiescent Current
• 1.3mA Shutdown Current
• 100kHz to 2.5MHz 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 Package With PowerPAD™
• Supported by SwitcherPro™ Software Tool
(http://focus.ti.com/docs/toolsw/folders/print/s
witcherpro.html)
• For SWIFT™ Documentation, See the TI
Website at http://www.ti.com/swift
APPLICATIONS
• 12-V, 24-V and 48-V Industrial and Commercial
Low Power Systems
• GSM, GPRS Modules in Fleet Management,
E-Meters, and Security Systems
DESCRIPTION
The TPS54260 device is a 60V, 2.5A, 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 138mA. Using the enable pin, shutdown supply current is
reduced to 1.3mA, when the enable pin is low.
Under voltage lockout is internally set at 2.5V, 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.
The TPS54260 is available in 10 pin thermally enhanced MSOP Power Pad™ package.
SIMPLIFIED SCHEMATIC
EFFICIENCY vs LOAD CURRENT
100
VIN
PWRGD
90
80
TPS54260
70
60
EN
BOOT
50
PH
40
SS /TR
RT /CLK
COMP
VSENSE
GND
30
VIN=12V
20
VOUT=3.3V
fsw=300kHz
10
0
0
0.5
1.0
1.5
2.0
2.5
3.0
I_O - Output Current - A
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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.
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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, Texas Instruments Incorporated