TPS62170 Datasheet, PDF (1/33 Pages) Texas Instruments – 3-17V 0.5A Step-Down Converter with DCS-ControlTM

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TPS62170, TPS62171
TPS62172, TPS62173
SLVSAT8A – NOVEMBER 2011 – REVISED APRIL 2012
3-17V 0.5A Step-Down Converter with DCS-Control^TM
Check for Samples: TPS62170, TPS62171, TPS62172, TPS62173
FEATURES
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• DCS-Control^TM Topology
• Input Voltage Range: 3 to 17 V
• Up to 500 mA Output Current
• Adjustable Output Voltage from 0.9 to 6 V
• Fixed Output Voltage Versions
• Seamless Power Save Mode Transition
• Typically 17µA Quiescent Current
• Power Good Output
• 100% Duty Cycle Mode
• Short Circuit Protection
• Over Temperature Protection
• Available in a 2 × 2 mm, WSON-8 Package
APPLICATIONS
• Standard 12V Rail Supplies
• POL Supply from Single or Multiple Li-Ion
Battery
• LDO Replacement
• Embedded Systems
• Digital Still Camera, Video
• Mobile PC's, Tablet, Modems
spacing
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DESCRIPTION
The TPS6217X 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 2.25MHz allows the use of
small inductors and provides fast transient response
as well as high output voltage accuracy by utilization
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 battery as well
as from 12V intermediate power rails. It supports up
to 0.5A continuous output current at output voltages
between 0.9V and 6V (with 100% duty cycle mode).
Power sequencing is also possible by configuring the
Enable and open-drain Power Good 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 an 8-pin WSON
package measuring 2 × 2 mm (DSG).
(3 .. 17)V
10uF
VIN
SW
EN
VOS
TPS62171
AGND
PG
PGND
FB
2.2µH
1.8V / 0.5A
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 © 2011–2012, Texas Instruments Incorporated