Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - DC/DC voltage regulator Boost SOT 23 6

4.7:H

VBAT

VOUT

10 F:

GND

TLV61220

OUT

10 F:

0.7V to V

OUT

1.8V to 5.5V

TLV61220

www.ti.com

SLVSB53 –MAY 2012

LOW INPUT VOLTAGE STEP-UP CONVERTER IN THIN SOT-23 PACKAGE

Check for Samples: TLV61220

FEATURES

APPLICATIONS

• Up to 95% Efficiency at Typical Operating • Battery Powered Applications

Conditions

– 1 to 3 Cell Alkaline, NiCd or NiMH

• 5.5 μA Quiescent Current

– 1 Cell Li-Ion or Li-Primary

• Startup Into Load at 0.7 V Input Voltage

• Solar or Fuel Cell Powered Applications

• Operating Input Voltage from 0.7 V to 5.5 V

• Consumer and Portable Medical Products

• Pass-Through Function during Shutdown

• Personal Care Products

• Minimum Switching Current 200 mA

• White or Status LEDs

• Protections:

• Smartphones

– Output Overvoltage

– Overtemperature

– Input Undervoltage Lockout

• Adjustable Output Voltage from 1.8 V to 5.5 V

• Small 6-pin Thin SOT-23 Package

DESCRIPTION

The TLV61220 provides a power-supply solution for products powered by either a single-cell, two-cell, or three-

cell alkaline, NiCd or NiMH, or one-cell Li-Ion or Li-polymer battery. Possible output currents depend on the

input-to-output voltage ratio. The boost converter is based on a hysteretic controller topology using synchronous

rectification to obtain maximum efficiency at minimal quiescent currents. The output voltage of the adjustable

version can be programmed by an external resistor divider, or is set internally to a fixed output voltage. The

converter can be switched off by a featured enable pin. While being switched off, battery drain is minimized. The

device is packaged in a 6-pin thin SOT-23 package (DBV).

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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.

Summary of content (20 pages)

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TLV61220 www.ti.com SLVSB53 – MAY 2012 LOW INPUT VOLTAGE STEP-UP CONVERTER IN THIN SOT-23 PACKAGE Check for Samples: TLV61220 FEATURES APPLICATIONS • • 1 • • • • • • • • Up to 95% Efficiency at Typical Operating Conditions 5.5 μA Quiescent Current Startup Into Load at 0.7 V Input Voltage Operating Input Voltage from 0.7 V to 5.
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TLV61220 SLVSB53 – MAY 2012 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 TA OUTPUT VOLTAGE DC/DC PACKAGE PART NUMBER –40°C to 85°C Adjustable 6-Pin SOT-23 TLV61220DBV ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range (unless otherwise noted) (1) MIN MAX – 0.3 to 7.
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TLV61220 www.ti.com SLVSB53 – MAY 2012 ELECTRICAL CHARACTERISTICS over recommended free-air temperature range and over recommended input voltage range (typical at an ambient temperature range of 25°C) (unless otherwise noted) DC/DC STAGE PARAMETER TEST CONDITIONS VIN Input voltage range VIN Minimum input voltage at startup RLoad ≥ 150 Ω VOUT TLV61220 output voltage range VIN < VOUT VFB TLV61220 feedback voltage ILH Inductor current ripple ISW switch current limit TYP 0.7 1.
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TLV61220 SLVSB53 – MAY 2012 www.ti.com PIN ASSIGNMENTS DBV PACKAGE TOP VIEW VBAT VOUT 6 FB 5 4 ABC 1 2 3 SW GND EN Terminal Functions TERMINAL NAME NO.
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TLV61220 www.ti.com SLVSB53 – MAY 2012 PARAMETER MEASUREMENT INFORMATION L1 4.7:H TLV61220 SW VOUT VOUT 1.8V to 5.5V R1 VBAT VIN 0.7V to VOUT EN C1 10:F C2 FB R2 10:F GND Table 1. List of Components: COMPONENT REFERENCE PART NUMBER MANUFACTURER VALUE C1 GRM188R60J106ME84D Murata 10 μF, 6.3V. X5R Ceramic C2 GRM188R60J106ME84D Murata 10 μF, 6.3V. X5R Ceramic L1 1269AS-H-4ZR7N Toko 4.
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TLV61220 SLVSB53 – MAY 2012 www.ti.com TYPICAL CHARACTERISTICS Table of Graphs FIGURE Output Current Efficiency Efficiency Output Voltage Waveforms Input Voltage, ISW = 330 mA, Minimum ISW= 200 mA, VO = 1.8V 1 Input Voltage, ISW = 400 mA, Minimum ISW = 200 mA, VO = 3.3V 2 Input Voltage, ISW = 380 mA, Minimum ISW = 200 mA, VO = 5V 3 vs Output Current, VO = 1.8 V, VI = [0.7 V; 1.2 V; 1.5 V] 4 vs Output Current, VO = 3.3 V, VI = [0.7 V; 1.2 V; 2.4V; 3V] 5 vs Output Current, VO = 5 V, VI = [0.
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TLV61220 www.ti.com SLVSB53 – MAY 2012 EFFICIENCY vs OUTPUT CURRENT AND INPUT VOLTAGE (VO=1.8V) MAXIMUM OUTPUT CURRENT vs INPUT VOLTAGE (VO=5V, Minimum ISW=200mA, L=4.7µH) 0.27 100 0.24 90 Vo=1.8V 80 70 0.18 Efficiency- % Output Current - A 0.21 0.15 0.12 ISW=380mA 0.09 60 VI=1.2V VI=0.7V 50 40 30 0.06 20 0.03 10 Minimum ISW 0 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0 0.01 4.5 0.1 Input Voltage - V 1 10 Output Current - mA 100 G000 Figure 3. Figure 4.
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TLV61220 SLVSB53 – MAY 2012 www.ti.com EFFICIENCY vs INPUT VOLTAGE AND OUTPUT CURRENT (VO=1.8V) EFFICIENCY vs INPUT VOLTAGE AND OUTPUT CURRENT (VO=3.3V) 100 100 Vo=1.8V 90 Io=10mA Vo=3.3V 90 Io=10mA 80 80 Io=1mA 70 Io=1mA Efficiency - % Efficiency - % 70 Io=50mA 60 50 Io=100:A 40 Io=50mA 60 50 30 30 20 20 10 10 0 0.7 0.9 1.1 1.3 1.5 1.7 Io=100:A 40 0 0.7 1.9 1.2 1.7 2.2 2.7 3.2 3.7 Input Voltage - V Input Voltage - V Figure 7. Figure 8.
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TLV61220 www.ti.com SLVSB53 – MAY 2012 OUTPUT VOLTAGE vs OUTPUT CURRENT AND INPUT VOLTAGE (VO=3.3V) LOAD TRANSIENT RESPONSE 3.5 Vo=3.3V Output Voltage 20mV/div, AC Output Voltage - V 3.4 VI=1.2V VI=2.4V 3.3 Output Current 10mA/div, DC 3.2 VI=0.7V VIN = 1.2V, VOUT=3.3V, IOUT= 5mA to 20mA 3.1 0.01 0.1 1 10 100 Output Current - mA Figure 11. Figure 12.
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TLV61220 SLVSB53 – MAY 2012 www.ti.com DETAILED DESCRIPTION OPERATION The TLV61220 is a high performance, high efficient boost converter. To achieve high efficiency the power stage is realized as a synchronous boost topology. For the power switching two actively controlled low RDS(on) power MOSFETs are implemented. CONTROLLER CIRCUIT The device is controlled by a hysteretic current mode controller.
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TLV61220 www.ti.com SLVSB53 – MAY 2012 Undervoltage Lockout An implemented undervoltage lockout function stops the operation of the converter if the input voltage drops below the typical undervoltage lockout threshold. This function is implemented in order to prevent malfunctioning of the converter. Overvoltage Protection If, for any reason, the output voltage is not fed back properly to the input of the voltage amplifier, control of the output voltage will not work anymore.
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TLV61220 SLVSB53 – MAY 2012 www.ti.com APPLICATION INFORMATION DESIGN PROCEDURE The TLV61220 is intended for systems powered by a single cell battery to up to three Alkaline, NiCd or NiMH cells with a typical terminal voltage between 0.7 V and 5.5 V. They can also be used in systems powered by onecell Li-Ion or Li-Polymer batteries with a typical voltage between 2.5 V and 4.2 V. Additionally, any other voltage source with a typical output voltage between 0.7 V and 5.5 V can be used with the TLV61220.
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TLV61220 www.ti.com SLVSB53 – MAY 2012 For selecting the inductor this would be the suitable value for the current rating. It also needs to be taken into account that load transients and error conditions may cause higher inductor currents. Equation 4 helps to estimate whether the device will work in continuous or discontinuous operation depending on the operating points. As long as the inequation is true, continuous operation is typically established.
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TLV61220 SLVSB53 – MAY 2012 www.ti.com Layout Considerations As for all switching power supplies, the layout is an important step in the design, especially at high peak currents and high switching frequencies. If the layout is not carefully done, the regulator could show stability problems as well as EMI problems. Therefore, use wide and short traces for the main current path and for the power ground paths.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 10-Feb-2014 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) TLV61220DBVR SOT-23 DBV 6 3000 178.0 9.0 TLV61220DBVT SOT-23 DBV 6 250 178.0 9.0 Pack Materials-Page 1 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 3.23 3.17 1.37 4.0 8.0 Q3 3.23 3.17 1.37 4.0 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 10-Feb-2014 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TLV61220DBVR SOT-23 DBV 6 3000 180.0 180.0 18.0 TLV61220DBVT SOT-23 DBV 6 250 180.0 180.0 18.
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