Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - DC/DC voltage regulator Boost SON 6

10µF

4.7

VIN

VOUT

10µF

GND

TPS61260

OUT

0.8 V t

o 4.0 V

TPS61260, TPS61261

www.ti.com

SLVSA99A –MAY 2011–REVISED FEBRUARY 2013

0.8-V INPUT SYNCHRONOUS BOOST CONVERTER WITH 100-mA OUTPUT CURRENT

FEATURES

• Up to 95% Efficiency • Undervoltage Lockout

• 100 mA Output Current at 3.3 V

out

(VIN > 1 V) • Available in a 2 × 2 mm, 6-pin SON Package

• Input Voltage Range from 0.8 V to 4.0 V

APPLICATIONS

• Fixed and Adjustable Output Voltage Options

• All single or dual cell Alkaline, NiCd or NiMH

from 1.8 V to 4.0 V

Battery Powered Products

• Programmable Average Output Current from

• High Output Impedance Battery (Coin Cells)

10 mA to 100 mA

Powered Products

• Adjustable Output Current Limit for Smallest

• Personal Medical Products

Inductor

• LED Driver

• Power Save Mode for Improved Efficiency at

Low Output Power

• Laser Pointer

• 29 µA Quiescent Current

• Wireless Headsets

• Advanced Softstart

• Industrial Metering Equipment

• Quasi Fixed Frequency Operation at 2.5 MHz

• Output Overvoltage Protection

• Load Disconnect During Shutdown

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 SON package measuring 2 × 2 mm (DRV).

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.

Summary of content (24 pages)

PAGE 1
TPS61260, TPS61261 www.ti.com SLVSA99A – MAY 2011 – REVISED FEBRUARY 2013 0.8-V INPUT SYNCHRONOUS BOOST CONVERTER WITH 100-mA OUTPUT CURRENT FEATURES 1 • • • • • • • • • • • • Up to 95% Efficiency 100 mA Output Current at 3.3 Vout (VIN > 1 V) Input Voltage Range from 0.8 V to 4.0 V Fixed and Adjustable Output Voltage Options from 1.8 V to 4.
PAGE 2
TPS61260, TPS61261 SLVSA99A – MAY 2011 – REVISED FEBRUARY 2013 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. AVAILABLE DEVICE OPTIONS (1) TA –40°C to 85°C (1) (2) OUTPUT VOLTAGE PACKAGE MARKING Adjustable QWD 3.
PAGE 3
TPS61260, TPS61261 www.ti.com SLVSA99A – MAY 2011 – REVISED FEBRUARY 2013 RECOMMENDED OPERATING CONDITIONS MIN NOM MAX UNIT Input Supply voltage at VIN 0.8 4.
PAGE 4
TPS61260, TPS61261 SLVSA99A – MAY 2011 – REVISED FEBRUARY 2013 www.ti.com PIN ASSIGNMENTS DRV PACKAGE (TOP VIEW) RI EN FB 1 2 3 GND Exposed Thermal Pad GND 6 5 4 VIN L VOUT Pin Functions PIN NAME NO. I/O DESCRIPTION EN 2 I Enable input. (High = enabled, Low = disabled). Do not leave floating. FB 3 I Voltage feedback of adjustable versions. Must be connected to VOUT on fixed output voltage versions. L 5 I Connection for Inductor RI 1 I Average output current programming input.
PAGE 5
TPS61260, TPS61261 www.ti.
PAGE 6
TPS61260, TPS61261 SLVSA99A – MAY 2011 – REVISED FEBRUARY 2013 www.ti.com TYPICAL CHARACTERISTICS TABLE OF GRAPHS DESCRIPTION FIGURE Maximum output current vs Input voltage (TPS61260, VOUT = {1.8 V; 2.5 V; 4.0 V}) 1 vs Input voltage (TPS61261, VOUT = 3.3 V) 2 vs Output current (TPS61260, VOUT = {1.8 V; 2.5 V; 4.0 V}) 3 vs Output current (TPS61261, VOUT = 3.3 V) 4 vs Input voltage (TPS61260, VOUT = 1.8 V, IOUT = {10; 20; 50 mA}) 5 vs Input voltage (TPS61260, VOUT = 2.
PAGE 7
TPS61260, TPS61261 www.ti.com SLVSA99A – MAY 2011 – REVISED FEBRUARY 2013 EFFICIENCY vs OUTPUT CURRENT 100 100 90 90 80 80 70 70 Efficiency (%) Efficiency (%) EFFICIENCY vs OUTPUT CURRENT 60 50 40 30 10 VIN = 1.2 V 0 0.01 0.1 40 1 Output Current (mA) 10 20 10 100 Figure 3. Figure 4. EFFICIENCY vs INPUT VOLTAGE EFFICIENCY vs INPUT VOLTAGE 100 90 90 80 80 70 70 60 50 40 30 10 100 G000 60 50 40 30 IOUT =10 mA IOUT =20 mA IOUT =50 mA 20 0 0.
PAGE 8
TPS61260, TPS61261 SLVSA99A – MAY 2011 – REVISED FEBRUARY 2013 www.ti.com OUTPUT CURRENT vs RESISTANCE AT RI OUTPUT VOLTAGE vs OUTPUT CURRENT 1.854 100 90 1.836 Output Voltage (V) Output Current (mA) 80 70 60 50 40 30 20 0 2.0 1.782 4.0 6.0 8.0 10.0 12.0 14.0 Resistance (kΩ) 16.0 18.0 VIN = 1.2 V, VOUT = 1.8 V, R3 = 2 kΩ 1.746 0.01 0.1 1 Output Current (mA) 20.0 G000 Figure 9. Figure 10. OUTPUT VOLTAGE vs OUTPUT CURRENT OUTPUT VOLTAGE vs OUTPUT CURRENT 2.575 4.12 2.55 4.
PAGE 9
TPS61260, TPS61261 www.ti.com SLVSA99A – MAY 2011 – REVISED FEBRUARY 2013 LOAD TRANSIENT RESPONSE LINE TRANSIENT RESPONSE Input Voltage 1 V/div, DC Output Current 20 mA/div, DC Output Voltage 100 mV/div, AC Output Voltage 100 mV/div, AC Inductor Current 200 mA/div, DC VIN = 1.2 V, VOUT = 3.3 V, IOUT = 5 mA to 45 mA VIN = 1.0 V to 1.5 V, VOUT = 3.3 V, IOUT = 50 mA Time 2 ms/div Figure 15. Inductor Current 100 mA/div, DC Time 2 ms/div Figure 16.
PAGE 10
TPS61260, TPS61261 SLVSA99A – MAY 2011 – REVISED FEBRUARY 2013 www.ti.com DETAILED DESCRIPTION Controller Circuit The controlling circuit of the device is based on a current mode topology. The inductor current is regulated by a fast current regulator loop which is controlled by either a voltage control loop or a reference current. The controller also uses input and output voltage feedforward.
PAGE 11
TPS61260, TPS61261 www.ti.com SLVSA99A – MAY 2011 – REVISED FEBRUARY 2013 Softstart and Short Circuit Protection During startup of the converter, the duty cycle and the peak current are limited in order to avoid high peak currents flowing from the input. After being enabled, the device starts operating. Until the output voltage reaches about 0.4 V, the average output current ramps up from zero to the programmed value, as the output voltage increases.
PAGE 12
TPS61260, TPS61261 SLVSA99A – MAY 2011 – REVISED FEBRUARY 2013 www.ti.com APPLICATION INFORMATION PROGRAMMING THE OUTPUT VOLTAGE Within the TPS6126x family, there are fixed and adjustable output voltage versions available. To properly configure the fixed output voltage devices, the FB pin is used to sense the output voltage. This means that it must be connected directly to VOUT. For the adjustable output voltage version, an external resistor divider is used to adjust the output voltage.
PAGE 13
TPS61260, TPS61261 www.ti.com SLVSA99A – MAY 2011 – REVISED FEBRUARY 2013 In Equation 3, the minimum inductance value required for accurate average output current regulation is calculated. VIN is the input voltage. For typical applications which require voltage regulation, the recommended inductor value is 4.7 μH. Applications with higher inductance values have lower light load efficiency. The recommended range for the inductor value is from 2.2 μH up to 22 μH.
PAGE 14
TPS61260, TPS61261 SLVSA99A – MAY 2011 – REVISED FEBRUARY 2013 www.ti.com VIN L1 VOUT C2 C1 GND R3 EN GND R2 R1 Figure 20. PCB Layout Suggestion THERMAL INFORMATION Implementation of integrated circuits in low-profile and fine-pitch surface-mount packages typically requires special attention to power dissipation.
PAGE 15
TPS61260, TPS61261 www.ti.com SLVSA99A – MAY 2011 – REVISED FEBRUARY 2013 L1 4.7 mH 0.8V to 3V VIN U1 TPS61261DRV 5 L VOUT 4 6 VIN C1 10mF PWM 10 mA to FB 3 2 EN 100 mA RI 1 7 PGND C2 D1 10mF R2 ADIM Analog Dimming 760mV-400mV 2kW 2kW R1 Figure 21. LED Driver 100 90 80 Efficiency (%) 70 60 50 40 30 VIN=1.2V VIN=1.8V 20 VIN=2.4V VIN=3V 10 0 10 20 30 40 50 60 70 80 90 100 LED Current (mA) Figure 22.
PAGE 16
TPS61260, TPS61261 SLVSA99A – MAY 2011 – REVISED FEBRUARY 2013 www.ti.com REVISION HISTORY Changes from Original (May 2011) to Revision A Page • Changed Synchronous Boost Operation section ................................................................................................................ 10 • Deleted Dynamic Current Limit section ..............................................................................................................................
PAGE 17
PACKAGE OPTION ADDENDUM www.ti.
PAGE 18
PACKAGE OPTION ADDENDUM www.ti.
PAGE 19
PACKAGE MATERIALS INFORMATION www.ti.com 7-Feb-2014 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing TPS61260DRVR SON DRV 6 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 3000 180.0 8.4 2.3 2.3 1.15 4.0 8.0 Q2 TPS61260DRVT SON DRV 6 250 180.0 8.4 2.3 2.3 1.15 4.0 8.0 Q2 TPS61261DRVR SON DRV 6 3000 180.0 8.4 2.3 2.3 1.15 4.0 8.
PAGE 20
PACKAGE MATERIALS INFORMATION www.ti.com 7-Feb-2014 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS61260DRVR SON DRV 6 3000 210.0 185.0 35.0 TPS61260DRVT SON DRV 6 250 210.0 185.0 35.0 TPS61261DRVR SON DRV 6 3000 210.0 185.0 35.0 TPS61261DRVT SON DRV 6 250 210.0 185.0 35.
PAGE 21
PAGE 22
PAGE 23
PAGE 24
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.