Boost Converter. TPS61252 Datasheet

TPS61252 Converter. Datasheet pdf. Equivalent

TPS61252 Datasheet
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Part TPS61252
Description Tiny 1.5-A Boost Converter
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Texas Instruments TPS61252
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
TPS61252
SLVSAG3A – SEPTEMBER 2010 – REVISED DECEMBER 2014
TPS61252 Tiny 1.5-A Boost Converter With Adjustable Input Current Limit
1 Features
1 Resistor Programmable Input Current Limit
– ±20% Current Accuracy at 500 mA over Full
Temperature Range
– Programmable from 100 mA up to 1500 mA
• Up to 92% Efficiency
• VIN Range from 2.3 V to 6.0 V
• Power Good Indicates Appropriate Output Voltage
Level
• Adjustable Output Voltage up to 6.5 V
• 100% Duty-Cycle Mode When VIN > VOUT
• Load Disconnect and Reverse Current Protection
• Short Circuit Protection
• Typical Operating Frequency 3.25 MHz
• Available in a 2-mm × 2-mm WSON-8 Package
2 Applications
• USB Host Supplies from a Single Li-Ion Battery
• Current Limited Applications
• Li-Ion Applications
• Audio Applications
• RF-PA Buffer
3 Description
The TPS61252 device provides a power supply
solution for products powered by either a three-cell
alkaline, NiCd or NiMH battery, or an one-cell Li-Ion
or Li-polymer battery. The wide input voltage range is
ideal to power portable applications like mobile
phones or computer peripherals. The device has a
resistor programmable (RILIM) input current limit and
is suitable for a wide variety of applications.
During light loads, the device automatically enters
skip mode (PFM), which allows the converter to
maintain the required output voltage, while only
drawing 30 μA quiescent current from the battery.
This allows maximum efficiency at lowest quiescent
currents.
TPS61252 allows the use of small inductors and
capacitors to achieve a small solution size. The
possibility to reduce the current limit by a external
resistor offers the potential use of physically even
smaller inductors with lower rated currents to further
reduce total solution sizes of the power supply.
During shutdown, the load is completely disconnected
from the battery. The TPS61252 is available in a 8-
pin WSON package measuring 2 mm × 2 mm (DSG).
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS61252
WSON (8)
2.00 mm x 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Typical Application Schematic
VIN
2.3 V to 6.0 V
L1
1 μH
C1
10 µF
TPS61252
SW VOUT
VIN
EN FB
RILIM
20 kΩ
ILIM
GND
PG
R1
768 kΩ
R2
243 kΩ
CFF
100 pF
R4
1 MΩ
VOUT
5.0 V
COUT
22 µF
Power Good
Output
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.



Texas Instruments TPS61252
TPS61252
SLVSAG3A – SEPTEMBER 2010 – REVISED DECEMBER 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Typical Application Schematic............................. 1
5 Revision History..................................................... 2
6 Device Options....................................................... 3
7 Pin Configuration and Functions ......................... 3
8 Specifications......................................................... 4
8.1 Absolute Maximum Ratings ...................................... 4
8.2 ESD Ratings.............................................................. 4
8.3 Recommended Operating Conditions....................... 4
8.4 Thermal Information .................................................. 4
8.5 Electrical Characteristics........................................... 5
8.6 Typical Characteristics .............................................. 5
9 Parameter Measurement Information .................. 7
10 Detailed Description ............................................. 8
10.1 Overview ................................................................. 8
10.2 Functional Block Diagram ....................................... 8
10.3 Feature Description................................................. 9
10.4 Device Functional Modes...................................... 11
11 Application and Implementation........................ 12
11.1 Application Information.......................................... 12
11.2 Typical Application ............................................... 12
12 Power Supply Recommendations ..................... 17
13 Layout................................................................... 17
13.1 Layout Guidelines ................................................. 17
13.2 Layout Example .................................................... 17
13.3 Thermal Considerations ........................................ 18
14 Device and Documentation Support ................. 19
14.1 Device Support...................................................... 19
14.2 Trademarks ........................................................... 19
14.3 Electrostatic Discharge Caution ............................ 19
14.4 Glossary ................................................................ 19
15 Mechanical, Packaging, and Orderable
Information ........................................................... 19
5 Revision History
Changes from Original (September 2010) to Revision A
Page
• Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section .................................................................................................. 1
2 Submit Documentation Feedback
Product Folder Links: TPS61252
Copyright © 2010–2014, Texas Instruments Incorporated



Texas Instruments TPS61252
www.ti.com
6 Device Options
TPS61252
SLVSAG3A – SEPTEMBER 2010 – REVISED DECEMBER 2014
TA
–40°C to 85°C
OUTPUT VOLTAGE(1)
Adjustable
PACKAGE MARKING
QTI
PACKAGE
8-Pin SON
(1) Contact TI for other fixed output voltage options
(2) For detailed ordering information please check the Mechanical, Packaging, and Orderable Information.
PART NUMBER(2)
TPS61252DSG
7 Pin Configuration and Functions
NAME
EN
FB
GND
ILIM
PIN
NO.
6
3
1
4
PG
SW
VIN
VOUT
Exposed
Thermal Pad
5
7
8
2
DSG Package
8 Pins
Top View
GND 1
VOUT 2
FB 3
ILIM 4
8 VIN
7 SW
6 EN
5 PG
Pin Functions
I/O DESCRIPTION
I Enable input. (1 enabled, 0 disabled). This pin must not be left floating and must be terminated
I Voltage feedback pin
Ground
I Adjustable input valley current limit. A resistor to ground programs the current limit. Can be
connected to VIN for maximum current.
O Output power good (1 good, 0 failure; open drain).If unused, connect to ground or leave floating
I Connection for Inductor
I Supply voltage for control stage
O Boost converter output
— Must be soldered to achieve appropriate power dissipation and for mechanical reasons. Must be
connected to GND.
Copyright © 2010–2014, Texas Instruments Incorporated
Product Folder Links: TPS61252
Submit Documentation Feedback
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