Datasheet > TPS57140-Q1

TPS57140-Q1

更新时间： 2024-01-26 19:25:13

品牌	Logo	应用领域
德州仪器 - TI		转换器
页数	文件大小	规格书
49页	1717K
描述
1.5-A 42-V STEP-DOWN SWIFTâ¢ DC/DC CONVERTER WITH Eco-modeâ¢ CONTROL

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TPS57140-Q1 数据手册

TPS57140-Q1

www.ti.com

SLVSAP3A –DECEMBER 2010–REVISED MARCH 2011

1.5-A 42-V STEP-DOWN SWIFT™ DC/DC CONVERTER

WITH Eco-mode™ CONTROL

Check for Samples: TPS57140-Q1

FEATURES

•

Adjustable Undervoltage Lockout Voltage and

Hysteresis

•

Qualified for Automotive Applications

3.5-V to 42-V Input Voltage Range

200-mΩ High-Side MOSFET

•

0.8-V Internal Voltage Reference

Supported by SwitcherPro™ Software Tool

(http://focus.ti.com/docs/toolsw/folders/print/s

witcherpro.html)

High Efficiency at Light Loads With

Pulse-Skipping Eco-mode™ Control Scheme

•

For SWIFT™ Documentation, See the TI

Website at http://www.ti.com/swift

•

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

APPLICATIONS

•

12-V and 24-V Industrial and Commercial Low

Power Systems

•

Aftermarket Automotive Accessories: Video,

GPS, Entertainment

Undervoltage and Overvoltage Power Good

Output

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. Using the enable pin, shutdown

supply 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/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 TPS57140-Q1 is available in a 10-pin thermally enhanced MSOP PowerPAD™ package (DGQ) and a

10-pin SON package (DRC).

SIMPLIFIED SCHEMATIC

EFFICIENCY

LOAD CURRENT

VIN

PWRGD

TPS57140-Q1

BOOT

SS/TR

RT/CLK

COMP

V_I= 12 V,

V_O= 3.3 V,

f_sw= 1200 kHz

VSENSE

GND

0.25

0.50 0.75

1.25 1.50

1.75

Load Current - A

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, SwitcherPro, SWIFT, PowerPAD are trademarks of Texas Instruments.

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.

12 3 4 5 6 7...49

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