TPS61261 Converters Datasheet

TPS61261 Datasheet, PDF, Equivalent


Part Number

TPS61261

Description

0.8-V Input Synchronous Boost Converters

Manufacture

etcTI

Total Page 28 Pages
Datasheet
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TPS61261
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TPS61260, TPS61261
SLVSA99C – MAY 2011 – REVISED APRIL 2018
TPS6126x 0.8-V Input Synchronous Boost Converters with 100-mA Output Current
1 Features
1 Input Voltage Range from 0.8 V to 4.0 V
• Up to 95% Efficiency
• 100 mA Output Current at 3.3 Vout (VIN > 1 V)
• Fixed and Adjustable Output Voltage Options from
1.8 V to 4.0 V
• Programmable Average Output Current from 10
mA to 100 mA
• Adjustable Output Current Limit for Smallest
Inductor
• Power Save Mode for Improved Efficiency at Low
Output Power
• 29-µA Quiescent Current
• Advanced Softstart
• Quasi Fixed Frequency Operation at 2.5 MHz
• Output Overvoltage Protection
• Load Disconnect During Shutdown
• Undervoltage Lockout
• Available in a 2.00 × 2.00 mm, 6-Pin WSON
Package
2 Applications
• All Single or Dual Cell Alkaline, NiCd or NiMH
Battery Powered Products
• High Output Impedance Battery (Coin Cells)
Powered Products
• Personal Medical Products
• LED Driver
• Laser Pointer
• Wireless Headsets
• Industrial Metering Equipment
3 Description
The TPS6126x devices provide a power supply
solution for products powered by either single or dual
cell alkaline, NiCd, or NiMH batteries. Its unique
advanced softstart makes it also suitable for products
powered by high output impedance battery types, like
coin cells. Output currents can go as high as 100 mA
while using a single cell alkaline battery, and
discharge it down to 0.8 V or lower.
The boost converter is based on a quasi fixed
frequency, pulse-width-modulation (PWM) controller
using synchronous rectification to obtain maximum
efficiency. At low load currents, the converter enters
Power Save Mode to ensure high efficiency over a
wide load current range. The maximum average
current in the switches is limited to a programmable
value which can go as high as 700 mA. The output
voltage is programmable using an external resistor
divider, or is fixed internally on the chip. In addition,
the average output current can be programmed as
well. The converter then regulates the programmed
output voltage or the programmed output current,
which ever demands lower output power. The
converter can be disabled to minimize battery drain.
During shutdown, the load is disconnected from the
battery. The device is packaged in a 6-pin WSON
(DRV) package.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS61260
TPS61261
WSON (6)
2.00 mm × 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
VIN
0.8 V to 4.0 V
L1
4.7 µH
C1
10 µF
L VOUT
VIN FB
EN
R1
R2
VOUT
C2
10 µ F
GND
RI
TPS61260
R3
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.

TPS61261
TPS61260, TPS61261
SLVSA99C – MAY 2011 – REVISED APRIL 2018
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 Handling Ratings ...................................................... 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Typical Characteristics .............................................. 6
7 Parameter Measurement Information .................. 8
7.1 Schematic and List of Components .......................... 8
8 Detailed Description ............................................ 10
8.1 Overview ................................................................. 10
8.2 Functional Block Diagrams ..................................... 10
8.3 Feature Description................................................. 11
8.4 Device Functional Modes........................................ 12
8.5 Programming .......................................................... 13
9 Application and Implementation ........................ 14
9.1 Application Information............................................ 14
9.2 Typical Applications ................................................ 14
10 Power Supply Recommendations ..................... 17
11 Layout................................................................... 17
11.1 Layout Guidelines ................................................. 17
11.2 Layout Example .................................................... 18
11.3 Thermal Considerations ........................................ 18
12 Device and Documentation Support ................. 19
12.1 Device Support .................................................... 19
12.2 Documentation Support ....................................... 19
12.3 Related Links ........................................................ 19
12.4 Trademarks ........................................................... 19
12.5 Electrostatic Discharge Caution ............................ 19
12.6 Glossary ................................................................ 19
13 Mechanical, Packaging, and Orderable
Information ........................................................... 19
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (November 2014) to Revision C
Page
• Changed term from µs to (µH) in Equation 3. ..................................................................................................................... 14
Changes from Revision A (February 2013) to Revision B
Page
• Added Handling Rating 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
• Changed Minimum input voltage for startup, -40°C < TJ < 105°C, Max from 0.8 V to 1.2 V ................................................. 5
• Added VEN = 0 V, VIN = 1.2 V, TA = 25°C Test Condition and values to Shutdown current................................................... 5
Changes from Original (May 2011) to Revision A
Page
• Changed Supply voltage to Input supply in RECOMMENDED OPERATING CONDITIONS ................................................ 4
• Changed ELECTRICAL CHARACTERISTICS ....................................................................................................................... 5
• Changed Synchronous Boost Operation section.................................................................................................................. 11
• Deleted Dynamic Current Limit section ................................................................................................................................ 12
• Changed Inductor Selection section..................................................................................................................................... 14
• Changed Capacitor Selection section .................................................................................................................................. 15
• Changed PowerPAD™ to Exposed Thermal Pad ................................................................................................................ 18
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Copyright © 2011–2018, Texas Instruments Incorporated
Product Folder Links: TPS61260 TPS61261


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity TPS61260, TPS61261 SLVSA99C – MAY 2011 – REVISED APRIL 2018 TPS612 6x 0.8-V Input Synchronous Boost Conver ters with 100-mA Output Current 1 Feat ures •1 Input Voltage Range from 0.8 V to 4.0 V • Up to 95% Efficiency • 100 mA Output Current at 3.3 Vout (VIN > 1 V) • Fixed and Adjustable Output Voltage Options from 1.8 V to 4.0 V Programmable Average Output Current f rom 10 mA to 100 mA • Adjustable Outp ut Current Limit for Smallest Inductor • Power Save Mode for Improved Effici ency at Low Output Power • 29-µA Qui escent Current • Advanced Softstart Quasi Fixed Frequency Operation at 2 .5 MHz • Output Overvoltage Protectio n • Load Disconnect During Shutdown Undervoltage Lockout • Available i n a 2.00 × 2.00 mm, 6-Pin WSON Package 2 Applications • All Single or Dual Cell Alkaline, NiCd or NiMH Battery Pow ered Products • High Output Impedance Battery (Coin Cells) Powered Products • Personal Medical Prod.
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