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  • TLV61220 Low-Input Voltage Step-Up Converter in Thin SOT-23 Package

    • SLVSB53A May   2012  – December 2014 TLV61220

      PRODUCTION DATA.  

  • CONTENTS
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  • TLV61220 Low-Input Voltage Step-Up Converter in Thin SOT-23 Package
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Typical Application Schematic
  5. 5 Revision History
  6. 6 Device Options
  7. 7 Pin Configuration and Functions
  8. 8 Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Typical Characteristics
  9. 9 Parameter Measurement Information
  10. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagram
    3. 10.3 Feature Description
      1. 10.3.1 Controller Circuit
        1. 10.3.1.1 Startup
        2. 10.3.1.2 Operation at Output Overload
        3. 10.3.1.3 Undervoltage Lockout
        4. 10.3.1.4 Overvoltage Protection
        5. 10.3.1.5 Overtemperature Protection
    4. 10.4 Device Functional Modes
      1. 10.4.1 Device Enable and Shutdown Mode
  11. 11Application and Implementation
    1. 11.1 Application Information
    2. 11.2 Typical Application
      1. 11.2.1 Design Requirements
      2. 11.2.2 Detailed Design Procedure
        1. 11.2.2.1 Adjustable Output Voltage Version
        2. 11.2.2.2 Inductor Selection
        3. 11.2.2.3 Capacitor Selection
          1. 11.2.2.3.1 Input Capacitor
          2. 11.2.2.3.2 Output Capacitor
      3. 11.2.3 Application Curves
  12. 12Power Supply Recommendations
  13. 13Layout
    1. 13.1 Layout Guidelines
    2. 13.2 Layout Example
    3. 13.3 Thermal Considerations
  14. 14Device and Documentation Support
    1. 14.1 Device Support
      1. 14.1.1 Third-Party Products Disclaimer
    2. 14.2 Documentation Support
      1. 14.2.1 Related Documentation
    3. 14.3 Trademarks
    4. 14.4 Electrostatic Discharge Caution
    5. 14.5 Glossary
  15. 15Mechanical, Packaging, and Orderable Information
  16. IMPORTANT NOTICE
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DATA SHEET

TLV61220 Low-Input Voltage Step-Up Converter in Thin SOT-23 Package

1 Features

  • 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 5.5 V
  • Pass-Through Function during Shutdown
  • Minimum Switching Current 200 mA
  • Protections:
    • Output Overvoltage
    • Overtemperature
    • Input Undervoltage Lockout
  • Adjustable Output Voltage from 1.8 V to 5.5 V
  • Small 6-pin Thin SOT-23 Package

2 Applications

  • Battery Powered Applications
    • 1 to 3 Cell Alkaline, NiCd or NiMH
    • 1 Cell Li-Ion or Li-Primary
  • Solar or Fuel Cell Powered Applications
  • Consumer and Portable Medical Products
  • Personal Care Products
  • White or Status LEDs
  • Smartphones

3 Description

The TLV61220 device 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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Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TLV61220 SOT (6) 2.90 mm x 1.60 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

4 Typical Application Schematic

TLV61220 pmi_schem776rev7[1].gif

5 Revision History

Changes from * Revision (May 2012) to A Revision

  • 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 sectionGo

6 Device Options

TA OUTPUT VOLTAGE
DC/DC		 PACKAGE PART NUMBER
–40°C to 85°C Adjustable 6-Pin SOT-23 TLV61220DBV

7 Pin Configuration and Functions

DBV Package
6 Pins
Top View
TLV61220 po_lvs510.gif

Pin Functions

PIN I/O DESCRIPTION
NAME NO.
EN 3 I Enable input (VBAT enabled, GND disabled)
FB 4 I Voltage feedback for programming the output voltage
GND 2 — IC ground connection for logic and power
SW 1 I Boost and rectifying switch input
VBAT 6 I Supply voltage
VOUT 5 O Boost converter output

8 Specifications

8.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted) (1)
MIN MAX UNIT
VIN Input voltage on VBAT, SW, VOUT, EN, FB –0.3 7.5 V
TJ Operating junction temperature –40 150 °C
Tstg Storage temperature –65 150 °C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

8.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±2000 V
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) ±1500
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

8.3 Recommended Operating Conditions

MIN NOM MAX UNIT
VIN Supply voltage at VIN 0.7 5.5 V
TA Operating free air temperature range –40 85 °C
TJ Operating virtual junction temperature range –40 125 °C

8.4 Thermal Information

THERMAL METRIC(1) TLV61220 UNIT
DBV
6 PINS
RθJA Junction-to-ambient thermal resistance 185.7 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 124.3
RθJB Junction-to-board thermal resistance 31.3
ψJT Junction-to-top characterization parameter 22.9
ψJB Junction-to-board characterization parameter 30.8
RθJC(bot) Junction-to-case (bottom) thermal resistance N/A
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.

8.5 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)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
DC/DC STAGE
VIN Input voltage range 0.7 5.5 V
VIN Minimum input voltage at startup RLoad ≥ 150 Ω 0.7 V
VOUT TLV61220 output voltage range VIN < VOUT 1.8 5.5 V
VFB TLV61220 feedback voltage 483 500 513 mV
ILH Inductor current ripple 200 mA
ISW switch current limit VOUT = 3.3 V, VIN = 1.2 V, TA = 25 °C 220 400 mA
VOUT = 3.3 V, TA = -40°C to 85 °C 180 400 mA
VOUT = 3.3 V, TA = 0°C to 85 °C 200 400 mA
RDS(on) Rectifying switch on resistance, HSD VOUT = 3.3 V 1000 mΩ
VOUT = 5 V 700 mΩ
Main switch on resistance, LSD VOUT = 3.3 V 600 mΩ
VOUT = 5 V 550 mΩ
Line regulation VIN < VOUT 0.5%
Load regulation VIN < VOUT 0.5%
IQ Quiescent current VIN IO = 0 mA, VEN = VIN = 1.2 V, VOUT = 3.3 V
 0.5 0.9 μA
VOUT 5 7.5 μA
ISD Shutdown current VIN VEN = 0 V, VIN = 1.2 V, VOUT ≥ VIN 0.2 0.5 μA
ILKG Leakage current into VOUT VEN = 0 V, VIN = 1.2 V, VOUT = 3.3 V 1 μA
Leakage current into SW VEN = 0 V, VIN = 1.2 V, VSW = 1.2 V, VOUT ≥ VIN 0.01 0.2 μA
IFB TLV61220 Feedback input current VFB = 0.5 V 0.01 μA
IEN EN input current Clamped on GND or VIN (VIN < 1.5 V) 0.005 0.1 μA
CONTROL STAGE
VIL EN input low voltage VIN ≤ 1.5 V 0.2 × VIN V
VIH EN input high voltage VIN ≤ 1.5 V 0.8 × VIN V
VIL EN input low voltage 5 V > VIN > 1.5 V 0.4 V
VIH EN input high voltage 5 V > VIN > 1.5 V 1.2 V
VUVLO Undervoltage lockout threshold for turn off VIN decreasing 0.5 0.7 V
Overvoltage protection threshold 5.5 7.5 V
Overtemperature protection 140 °C
Overtemperature hysteresis 20 °C

8.6 Typical Characteristics

Table 1. Table of Graphs

FIGURE
Output Current Input Voltage, ISW = 330 mA, Minimum ISW= 200 mA, VO = 1.8V Figure 1
Input Voltage, ISW = 400 mA, Minimum ISW = 200 mA, VO = 3.3V Figure 2
Input Voltage, ISW = 380 mA, Minimum ISW = 200 mA, VO = 5V Figure 3
Efficiency vs Output Current, VO = 1.8 V, VI = [0.7 V; 1.2 V; 1.5 V] Figure 4
vs Output Current, VO = 3.3 V, VI = [0.7 V; 1.2 V; 2.4V; 3V] Figure 5
vs Output Current, VO = 5 V, VI = [0.7 V; 1.2 V; 3.6V; 4.2V] Figure 6
Efficiency vs Input Voltage, VO = 1.8 V, IO = [100µA; 1mA ; 10mA; 50mA] Figure 7
vs Input Voltage, VO = 3.3 V, IO = [100µA; 1mA ; 10mA; 50mA] Figure 8
vs Input Voltage, VO = 5 V, IO = [100µA; 1mA ; 10mA; 50mA] Figure 9
Output Voltage vs Output Current, VO = 1.8 V, VI = [0.7 V; 1.2 V] Figure 10
vs Output Current, VO = 3.3 V, VI = [0.7 V; 1.2 V; 2.4 V] Figure 11
TLV61220 Figure13.gif
VO = 1.8 V
Figure 1. Maximum Output Current vs Input Voltage
TLV61220 Figure15.gif
VO = 5 V
Figure 3. Maximum Output Current vs Input Voltage
TLV61220 Figure2rrev2.gif
Figure 5. Efficiency vs Output Current and Input Voltage
TLV61220 Figure45.gif
Figure 7. Efficiency vs Input Voltage and Output Current
TLV61220 Figure6.gif
Figure 9. Efficiency vs Input Voltage and Output Current
TLV61220 Figure8.gif
Figure 11. Output Voltage vs Output Current and Input Voltage
TLV61220 Figure14.gif
VO = 3.3 V
Figure 2. Maximum Output Current vs Input Voltage
TLV61220 figure1rev2.gif
Figure 4. Efficiency vs Output Current and Input Voltage
TLV61220 Figure3rev1.gif
Figure 6. Efficiency vs Input Voltage and Output Current
TLV61220 Figure52.gif
Figure 8. Efficiency vs Input Voltage and Output Current
TLV61220 Figure7.gif
Figure 10. Output Voltage vs Output Current and Input Voltage

 
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