Step-Up Converter. TPS61241 Datasheet

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TPS61241 Datasheet
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Part TPS61241
Description 3.5-MHz High Efficiency Step-Up Converter
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Texas Instruments TPS61241
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
TPS61240, TPS61241
SLVS806D – APRIL 2009 – REVISED DECEMBER 2015
TPS6124x 3.5-MHz High Efficiency Step-Up Converter
1 Features
1 Efficiency > 90% at Nominal Operating Conditions
• Total DC Output Voltage Accuracy 5.0 V±2%
• Typical 30-μA Quiescent Current
Best in Class Line and Load Transient
• Wide VIN Range From 2.3 V to 5.5 V
• Output Current up to 450 mA
• Automatic PFM/PWM Mode Transition
• Low Ripple Power Save Mode for Improved
Efficiency at Light Loads
• Internal Softstart, 250-μs Typical Start-Up Time
• 3.5-MHz Typical Operating Frequency
• Load Disconnect During Shutdown
• Current Overload and Thermal Shutdown
Protection
• Three Surface-Mount External Components
Required (One MLCC Inductor, Two Ceramic
Capacitors)
• Total Solution Size <13 mm2
• Available in a 6-Pin DSBGA and 2-mm × 2-mm
WSON Package
2 Applications
• USB-OTG Applications
• Portable HDMI Applications
• Cell Phones, Smart Phones
• PDAs, Pocket PCs
• Portable Media Players
• Digital Cameras
VIN
CIN
2.2 mF
Typical Application Schematic
L
1 mH
TPS61240
L VOUT
VIN FB
COUT
4.7 mF
EN GND
V 5V
OUT
3 Description
The TPS6124x device is a highly efficient
synchronous step-up DC-DC converter optimized for
products powered by either a three-cell alkaline, NiCd
or NiMH, or one-cell Li-Ion or Li-Polymer battery. The
TPS6124x supports output currents up to 450 mA.
The TPS61240 has an input valley current limit of 500
mA, and the TPS61241 has an input valley current of
600 mA.
With an input voltage range of 2.3 V to 5.5 V, the
device supports batteries with extended voltage
range and are ideal to power portable applications
like mobile phones and other portable equipment.
The TPS6124x boost converter is based on a quasi-
constant on-time valley current mode control scheme.
The TPS6124x presents a high impedance at the
VOUT pin when shut down. This allows for use in
applications that require the regulated output bus to
be driven by another supply while the TPS6124x is
shut down.
During light loads the device will automatically pulse
skip allowing maximum efficiency at lowest quiescent
currents. In the shutdown mode, the current
consumption is reduced to less than 1 μA.
TPS6124x allows the use of small inductors and
capacitors to achieve a small solution size. During
shutdown, the load is completely disconnected from
the battery. The TPS6124x is available in a 6-pin
DSBGA and 2-mm × 2-mm WSON package.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS61240
WSON (6)
DSBGA (6)
2.00 mm × 2.00 mm
1.25 mm × 0.86 mm
TPS61241
DSBGA (6)
1.25 mm × 0.86 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Efficiency vs Output Current
100
90 VI = 3.6 V VI = 4.2 V
80
70 VI = 3 V
60 VI = 2.3 V
50
40
30
20
10
0
0.00001 0.0001 0.001
0.01
0.1
IO - Output Current - A
1
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 TPS61241
TPS61240, TPS61241
SLVS806D – APRIL 2009 – REVISED DECEMBER 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Options....................................................... 3
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 ESD Ratings.............................................................. 4
7.3 Recommended Operating Conditions....................... 4
7.4 Thermal Information .................................................. 4
7.5 Electrical Characteristics........................................... 5
7.6 Typical Characteristics .............................................. 6
8 Parameter Measurement Information .................. 8
9 Detailed Description .............................................. 9
9.1 Overview ................................................................... 9
9.2 Functional Block Diagram ......................................... 9
9.3 Feature Description................................................... 9
9.4 Device Functional Modes........................................ 11
10 Application and Implementation........................ 12
10.1 Application Information.......................................... 12
10.2 Typical Application ............................................... 12
10.3 System Examples ................................................. 17
11 Power Supply Recommendations ..................... 17
12 Layout................................................................... 18
12.1 Layout Guidelines ................................................. 18
12.2 Layout Example .................................................... 18
12.3 Thermal Considerations ........................................ 18
13 Device and Documentation Support ................. 19
13.1 Device Support...................................................... 19
13.2 Related Links ........................................................ 19
13.3 Trademarks ........................................................... 19
13.4 Electrostatic Discharge Caution ............................ 19
13.5 Glossary ................................................................ 19
14 Mechanical, Packaging, and Orderable
Information ........................................................... 19
14.1 Chip Scale Package Dimensions.......................... 19
4 Revision History
Changes from Revision C (December 2014) to Revision D
Page
• Changed VIH Description From: High level input voltage, EN To: High level input voltage threshold, EN in the
Electrical Characteristics ........................................................................................................................................................ 5
• Changed VIL Description From: Low level input voltage, EN To: Low level input voltage threshold, EN in the
Electrical Characteristics ........................................................................................................................................................ 5
Changes from Revision B (February 2012) to Revision C
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
Copyright © 2009–2015, Texas Instruments Incorporated
Product Folder Links: TPS61240 TPS61241



Texas Instruments TPS61241
www.ti.com
5 Device Options
TPS61240, TPS61241
SLVS806D – APRIL 2009 – REVISED DECEMBER 2015
PART NUMBER(1)
TPS61240
TPS61241
TPS61242 (2)
OUTPUT
VOLTAGE
5V
DEVICE SPECIFIC FEATURES
Supports 5 V, up to 250 mA loading down to 3.2 V input voltage
Supports 5 V, up to 250 mA loading down to 3.2 V input voltage
Supports 5 V, up to 300 mA loading down to 3.2 V input voltage
Optimized to drive an inductive load
(1) See Mechanical, Packaging, and Orderable Information for ordering information.
(2) Product preview. Contact TI factory for more information.
6 Pin Configuration and Functions
TOP VIEW
DSBGA Package
6 Pins
Top View
BOTTOM VIEW
A1 A2
A2 A1
B1 B2
B2 B1
C1 C2
C2 C1
WSON Package
6 Pins
Top View
16
25
34
NAME
EN
FB
GND
L
VIN
VOUT
PIN
WSON
4
3
1
5
6
2
DSGBA
C1
C2
A2
B1
A1
B2
Pin Functions
I/O DESCRIPTION
I Enable
I Feedback input
— Ground
I Boost and rectifying switch input
I Supply voltage
O Output
REMARKS
Positive polarity. Low = IC shutdown.
Feedback for regulation.
Power ground and IC ground
Inductor connection to FETs
Supply from battery
Connected to load
Copyright © 2009–2015, Texas Instruments Incorporated
Product Folder Links: TPS61240 TPS61241
Submit Documentation Feedback
3





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