TPS62140_13 Datasheet, PDF (1/35 Pages) Texas Instruments – 3-V to 17-V 2-A Step-Down Converter in 3x3 QFN Package

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TPS62140, TPS62140A
TPS62141, TPS62142, TPS62143
SLVSAJ0B – NOVEMBER 2011 – REVISED JUNE 2013
3-V to 17-V 2-A Step-Down Converter in 3x3 QFN Package
Check for Samples: TPS62140, TPS62140A, 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
• Over Temperature 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
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 2.5MHz 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 3V to
17V, 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 2A of continuous output current at
output voltages between 0.9V and 6V (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 17μA 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 2μA.
The device, available in adjustable and fixed output
voltage versions, is packaged in a 16-pin QFN
package measuring 3 × 3 mm (RGT).
spacing
(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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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.
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