TPS62140 Datasheet, PDF (1/34 Pages) Texas Instruments – 3-V to 17-V 2-A Step-Down Converter in 3-mm × 3-mm QFN Package

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TPS62140
TPS62141, TPS62142, TPS62143
SLVSAJ0 – NOVEMBER 2011
3-V to 17-V 2-A Step-Down Converter in 3-mm × 3-mm QFN Package
Check for Samples: TPS62140, TPS62141, TPS62142, TPS62143
FEATURES
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• DCS-Control^TM Topology
• Input Voltage Range: 3 V to 17 V
• Up to 2-A Output Current
• Adjustable Output Voltage from 0.9 V to 6 V
• Pin-Selectable Output Voltage (Nominal, +5%)
• Programmable Soft Start and Tracking
• Seamless Power-Save Mode Transition
• Quiescent Current of 17 µA (typ.)
• Selectable Operating Frequency
• Power-Good Output
• 100% Duty-Cycle Mode
• Short-Circuit Protection
• Overtemperature Protection
• Available in a 3-mm × 3-mm, QFN-16 Package
APPLICATIONS
• Standard 12-V Rail Supplies
• POL Supply From Single or Multiple Li-Ion
Battery
• Solid-State Disk Drives
• Embedded Systems
• LDO Replacement
• Mobile PCs, Tablet, Modems, Cameras
spacing
DESCRIPTION
The TPS6214X family is an easy-to-use synchronous
step-down dc-dc converter optimized for applications
with high power density. A high switching frequency
of typically 2.5 MHz allows the use of small inductors
and provides fast transient response by use of the
DCS-Control™ topology.
With its wide operating input voltage range of 3 V to
17 V, the devices are ideally suited for systems
powered from either a Li-Ion or other batteries, as
well as from 12-V intermediate power rails. It
supports up to 2 A of continuous output current at
output voltages between 0.9 V and 6 V (with 100%
duty-cycle mode).
The output voltage start-up ramp is controlled by the
soft-start pin, which allows operation as either a
standalone power supply or in tracking configurations.
Power sequencing is also possible by configuring the
enable (EN) and open-drain power-good (PG) pins.
In power-save mode, the devices show quiescent
current of about 17 μA from VIN. Power-save mode,
entered automatically and seamlessly if load is small,
maintains high efficiency over the entire load range.
In shutdown mode, the device is turned off and
shutdown current consumption is less than 2 μA.
The device, available in adjustable and fixed output
voltage versions, is packaged in a 16-pin QFN
package measuring 3 mm × 3 mm (RGT).
(3 .. 17)V
10uF
3.3nF
PVIN
SW
AVIN
VOS
EN
PG
TPS62141
SS/TR
FB
DEF
AGND
FSW
PGND
2.2 µH
1.8V / 2A
100k
22uF
Figure 1. Typical Application and Efficiency
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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.
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 © 2011, Texas Instruments Incorporated