TPS62140_15 Datasheet, PDF (1/40 Pages) Texas Instruments – TPS6214x 3-V to 17-V 2-A Step-Down Converter in 3 × 3 QFN Package

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TPS62140, TPS62140A
TPS62141, TPS62142, TPS62143
SLVSAJ0C – NOVEMBER 2011 – REVISED AUGUST 2015
TPS6214x 3-V to 17-V 2-A Step-Down Converter in 3 × 3 QFN Package
1 Features
•1 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 (Typical)
• Selectable Operating Frequency
• Power-Good Output
• 100% Duty-Cycle Mode
• Short-Circuit Protection
• Over Temperature Protection
• Pin to Pin Compatible with TPS6213x/5x
• Available in a 3-mm × 3-mm, VQFN-16 Package
2 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
• Server, Microserver
• Data Terminal, Point of Sales (ePOS)
3 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 their 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 draw quiescent
current of about 17 μA from VIN. Power Save Mode,
entered automatically and seamlessly if the load is
small, maintains high efficiency over the entire load
range. In Shutdown Mode, the device is turned off
and current consumption is less than 2 μA.
The device, available in adjustable and fixed output
voltage versions, is packaged in a 16-pin VQFN
package measuring 3 mm × 3 mm (RGT).
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS6214x
VQFN (16)
3.00 mm x 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Efficiency vs Output Current
(3 .. 17)V
10uF
3.3nF
Simplified Schematic
PVIN
SW
AVIN
VOS
EN
PG
TPS62141
SS/TR
FB
DEF
AGND
FSW
PGND
2.2 µH
1.8V / 2A
100k
22uF
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.