SLVSD38C November   2015  – August 2021 TPS61089

PRODMIX  

  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 Undervoltage Lockout (UVLO)
      2. 8.3.2 Enable and Disable
      3. 8.3.3 Soft Start
      4. 8.3.4 Adjustable Switching Frequency
      5. 8.3.5 Adjustable Peak Current Limit
      6. 8.3.6 Overvoltage Protection
      7. 8.3.7 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Operation
        1. 8.4.1.1 Forced PWM Mode
        2. 8.4.1.2 PFM Mode
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Custom Design With WEBENCH® Tools
        2. 9.2.2.2 Setting Switching Frequency
        3. 9.2.2.3 Setting Peak Current Limit
        4. 9.2.2.4 Setting Output Voltage
        5. 9.2.2.5 Inductor Selection
        6. 9.2.2.6 Input Capacitor Selection
        7. 9.2.2.7 Output Capacitor Selection
        8. 9.2.2.8 Loop Stability
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
      1. 11.2.1 Thermal Considerations
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
      2. 12.1.2 Development Support
        1. 12.1.2.1 Custom Design With WEBENCH® Tools
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

7.5 Electrical Characteristics

VIN = 2.7 V to 5.5 V, VOUT = 9 V, TJ = –40°C to 125°C. Typical values are at TJ = 25°C, unless otherwise noted.

PARAMETERTEST CONDITIONSMINTYPMAXUNIT
POWER SUPPLY
VINInput voltage range2.712V
VIN_UVLO Input voltage undervoltage lockout (UVLO) thresholdVIN rising2.7V
VIN falling2.42.5V
VIN_HYS VIN UVLO hysteresis200mV
VCCVCC regulation voltageICC = 2 mA, VIN = 8 V5.8V
VCC_UVLO VCC UVLO thresholdVCC falling2.1V
IQ Quiescent current into VIN pinIC enabled, No load, VIN = 2.7 V to 5.5 V, VFB = 1.3 V, VOUT = 12 V, TJ ≤ 85°C13µA
Quiescent current into VOUT pinIC enabled, No load, VIN = 2.7 V to 5.5 V, VFB = 1.3 V, VOUT = 12 V, TJ ≤ 85°C100180µA
ISDShutdown current into VIN pinIC disabled, VIN = 2.7 V to 5.5 V, TJ ≤ 85°C13µA
OUTPUT
VOUTOutput voltage range4.512.6V
VREF Reference voltage at FB pinPWM mode1.1881.2121.236V
PFM mode1.224V
IFB_LKG Leakage current into FB pinVFB = 1.2 V100nA
VOVPOutput overvoltage protection thresholdVOUT rising12.713.213.6V
VOVP_HYS Output overvoltage protection hysteresisVOUT falling below VOVP 0.25V
tSSSoft startup timeCOUT(effective) = 47 µF, IOUT = 0 A246ms
ERROR AMPLIFIER
ISINKCOMP pin sink currentVFB = VREF + 200 mV, VCOMP = 1.9 V20µA
ISOURCE COMP pin source currentVFB = VREF – 200 mV, VCOMP = 1.9 V20µA
VCCLP_H High clamp voltage at the COMP pinVFB = 1 V, RILIM = 127 kΩ2.3V
VCCLP_L Low clamp voltage at the COMP pinVFB = 1.4 V, RILIM = 127 kΩ1.4V
GEAError amplifier transconductanceVCOMP = 1.9 V190µS
POWER SWITCH
RDS(on) High-side MOSFET on-resistanceVCC = 6 V2744mΩ
Low-side MOSFET on-resistanceVCC = 6 V1931mΩ
SWITCHING FREQUENCY
fSW Switching frequencyRFSW = 301 kΩ500kHz
RFSW = 46.4 kΩ2000kHz
tON_min Minimum on timeVCC = 6 V90180ns
CURRENT LIMIT
ILIMPeak switch current limit, TPS61089RILIM = 127 kΩ7.38.18.9A
RILIM = 100 kΩ9.01011A
VILIMInternal reference voltage at ILIM pin1.212V
EN LOGIC INPUT
VEN_HEN Logic high threshold1.2V
VEN_LEN Logic Low threshold0.4V
RENEN pulldown resistor800kΩ
PROTECTION
TSD Thermal shutdown thresholdTJ rising150°C
TSD_HYS Thermal shutdown hysteresisTJ falling below TSD 20°C