SLVSCK4A September   2015  – May 2016 TPS61235P , TPS61236P

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Boost Controller Operation
      2. 8.3.2  Soft Start
      3. 8.3.3  Enable and Disable
      4. 8.3.4  Constant Output Voltage and Constant Output Current Operations
        1. 8.3.4.1 Constant Voltage Operation
        2. 8.3.4.2 Output Current Monitor
        3. 8.3.4.3 Constant Current Operation
      5. 8.3.5  Over Current Protection
      6. 8.3.6  Load Status Indication
      7. 8.3.7  Under voltage Lockout
      8. 8.3.8  Over Voltage Protection and Reverse Current Block
      9. 8.3.9  Short Circuit Protection
      10. 8.3.10 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 PWM Mode
      2. 8.4.2 PFM Mode
      3. 8.4.3 CV Mode and CC Mode
  9. 9 Applications and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 TPS61236P 3-V to 4.35-V Input, 5-V Output Voltage, 3-A Maximum Output Current
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Programming the Output Voltage
          2. 9.2.1.2.2 Program the Constant Output Current
          3. 9.2.1.2.3 Inductor and Capacitor Selection
            1. 9.2.1.2.3.1 Inductor Selection
            2. 9.2.1.2.3.2 Output Capacitor Selection
            3. 9.2.1.2.3.3 Input Capacitor Selection
          4. 9.2.1.2.4 Loop Stability, Feed Forward Capacitor
          5. 9.2.1.2.5 INACT Pin Pull-up Resistor
        3. 9.2.1.3 TPS61236P 5-V Output Application Curves
      2. 9.2.2 TPS61236P 2.3-V to 5-V Input, 5-V 2-A Output Converter
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
        3. 9.2.2.3 TPS61236P 5-V Output Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Thermal Considerations
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Related Links
    4. 12.4 Receiving Notification of Documentation Updates
    5. 12.5 Community Resources
    6. 12.6 Trademarks
    7. 12.7 Electrostatic Discharge Caution
    8. 12.8 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7 Specifications

7.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)
MIN MAX UNIT
Voltage(2) VIN, EN, VOUT, CC, INACT, FB –0.3 6 V
SW –0.3 7 V
Operating junction temperature, TJ –40 150 °C
Storage temperature, Tstg –65 150 °C
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods my affect device reliability.
(2) All voltages are with respect to network ground terminal.

7.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±4000 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.

7.3 Recommended Operating Conditions

MIN NOM MAX UNIT
VIN(1) Supply voltage at VIN pin 2.3 VOUT – 0.6 V
VOUT Target output voltage (TPS61235P) 5.1 V
Target output voltage (TPS61236P) 2.9 5.5 V
L Effective inductance 0.7 1 1.3 µH
CI Effective input capacitance(2) 4.7 10 µF
CO Effective output capacitance(2) 20 µF
CRCC Capacitor parallel with the RCC resistor connected at CC pin 1 10 nF
RINACT INACT pin pull up resistance 1 MΩ
REN EN pin pull down resistance 1 MΩ
TJ Operating junction temperature –40 125 °C
(1) The maximum input voltage should be 0.6-V lower than the output voltage in Constant Voltage operation for the TPS6123x to function correctly.
(2) Effective capacitance value. Ceramic capacitor’s derating effect under bias should be considered when selecting capacitors.

7.4 Thermal Information

THERMAL METRIC(1) TPS61235P UNIT
TPS61236P
RWL (VQFN)
9 PINS
RθJA Junction-to-ambient thermal resistance 28.7 °C/W
RθJC(top) Junction-to-case(top) thermal resistance 24.1 °C/W
RθJB Junction-to-board thermal resistance 10.9 °C/W
ψJT Junction-to-top characterization parameter 0.1 °C/W
ψJB Junction-to-board characterization parameter 10.8 °C/W
RθJC(bottom) Junction-to-case(bottom) thermal resistance 1.6 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.

7.5 Electrical Characteristics

TJ = –40°C to 125°C and VIN = 3.6 V. Typical values are at TJ = 25°C, unless otherwise noted.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
POWER SUPPLY
VIN Input voltage 2.3 VOUT – 0.6 V
VUVLO Input under voltage lockout VIN rising 2.2 2.3 V
Hysteresis 125 mV
IQ Quiescent current into VIN IC enabled, No Load, No switching,
VOUT = 5.1 V		 5 11 µA
Quiescent current into VOUT 5 30 µA
ISD Shutdown current into VIN IC disabled, TJ = –40°C to 85°C 0.01 3 µA
OUTPUT
VOUT Output voltage range TPS61236P 2.9 5.5 V
Output voltage PWM mode,
TPS61235P 		5.0 5.1 5.2 V
PFM mode,
TPS61235 		5.2 V
VFB Feedback voltage PWM mode,
TPS61236P		 1.219 1.244 1.269 V
PFM mode,
TPS61236P		 1.256 V
VOVP Output over voltage protection threshold 5.60 5.80 5.93 V
ILKG_FB Leakage current into FB pin TPS61235P, VFB = 5.1 V 4000 nA
TPS61236P, VFB = 1.244 V 120 nA
ILKG_SW Leakage current into SW pin IC disabled, TJ = –40°C to 85°C,
VSW = 5.1 V		 0.05 2 µA
ILKG_VOUT Leakage current into VOUT pin IC disabled, TJ = –40°C to 85°C,
VOUT = 5.1 V		 0.05 2 µA
Line regulation IOUT = 2A, VIN = 2.7 V to 4.5 V,
VOUT = 5.1 V		 0.06 %/V
Load regulation IOUT = 0.5 A to 3 A, VIN = 3.6 V,
VOUT = 5.1 V		 0.06 %/A
POWER STAGE
RDS(on) High side MOSFET on resistance VOUT = 5.1 V 14 30 mΩ
Low side MOSFET on resistance VOUT = 5.1 V 14 30 mΩ
fsw Switching frequency VOUT = 5.1 V, PWM mode 750 1000 1250 kHz
Constant output current limit accuracy RCC = 124 kΩ,
TJ = 25°C		 –15% 15%
RCC = 61.9 kΩ,
TJ = 25°C		 –10% 10%
RCC = 61.9 kΩ,
TJ = –20°C to 125°C		 –15% 15%
ILIM Switch valley current limit TJ = –20°C to 100°C 6.5 8 9.5 A
ILIM_pre Precharge mode current limit VOUT = 0 V,
TJ = 0°C to 125°C		 0.05 0.25 0.8 A
VOUT = 2 V 1.3 A
VOUT = 3 V 1.7 A
IINACT_th Inactive threshold VOUT = 5.1 V 50 mA
tINACT_delay Deglitch delay VOUT = 5.1 V 15 ms
TSD Thermal shutdown threshold TJ rising 140 °C
Hysteresis 15 °C
LOGIC INTERFACE
VEN_H EN Logic high input voltage 1.0 V
VEN_L EN Logic low input voltage 0.4 V
ILKG_EN EN pin input leakage current EN pin connected to GND or VIN 0.01 0.3 µA
VINACT INACT pin output low level voltage ISINK_INACT = 80 µA 0.4 V

7.6 Typical Characteristics

VIN = 3.6 V, VOUT = 5.0 V, TJ = –40°C to 125 °C, unless otherwise noted.
TPS61235P TPS61236P D001_SLVSCK4.gif
VOUT = 4.5 V (TPS61236P), CC pin connected to GND
Figure 1. Efficiency vs Output Current with Different Inputs
TPS61235P TPS61236P D003_SLVSCK4.gif
VOUT = 5.5 V (TPS61236P), CC pin connected to GND
Figure 3. Efficiency vs Output Current with Different Inputs
TPS61235P TPS61236P D009_SLVSCK4.gif
VOUT = 5.1 V (TPS61235P), VIN = 3.6 V, No Load
Figure 5. No Load Supply Current vs Ambient Temperature
TPS61235P TPS61236P D011_SLVSCK4.gif
3.6-V Input
Figure 7. DC Pre-Charge Current vs Output Voltage
TPS61235P TPS61236P D021_SLVSCK4.gif
TA = 25°C
Figure 9. Current Limit vs Input Voltage
TPS61235P TPS61236P D019_SLVSCK4.gif
VOUT = 5.1 V (TPS61235P), TA = 25°C
Figure 11. Constant Output Current vs Input Voltage
TPS61235P TPS61236P D002_SLVSCK4.gif
VOUT = 5.1 V (TPS61235P), CC pin connected to GND
Figure 2. Efficiency vs Output Current with Different Inputs
TPS61235P TPS61236P D008_SLVSCK4.gif
VOUT = 5.1 V (TPS61235P), No Load, TA = 25°C
Figure 4. No Load Supply Current vs Input Voltage
TPS61235P TPS61236P D010_SLVSCK4.gif
TA = 25°C
Figure 6. DC Pre-Charge Current vs Output Voltage
TPS61235P TPS61236P D012_SLVSCK4.gif
VOUT = 5.1 V (TPS61235P), CC pin connected to GND, TA = 25°C
Figure 8. Minimum Load Resistance at Startup
TPS61235P TPS61236P D022_SLVSCK4.gif
VIN = 3.6 V
Figure 10. Current Limit vs Ambient Temperature
TPS61235P TPS61236P D020_SLVSCK4.gif
VOUT = 5.1 V (TPS61235P), RCC = 61.9 kΩ (CC current set to 2 A)
Figure 12. Constant Output Current vs Ambient Temperature