SLUSBG4B March   2013  – August 2021 TPS53511

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 PWM Operation
      2. 7.3.2 PWM Frequency and Adaptive On-Time Control
      3. 7.3.3 Soft Start and Pre-Biased Soft-Start Function
      4. 7.3.4 Power Good
      5. 7.3.5 Output Discharge Control
      6. 7.3.6 Current Protection
      7. 7.3.7 Overvoltage/Undervoltage Protection
      8. 7.3.8 UVLO Protection
      9. 7.3.9 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Light Load Mode Control
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Output Inductor Selection
        2. 8.2.2.2 Output Capacitor Selection
        3. 8.2.2.3 Input Capacitor Selection
        4. 8.2.2.4 Bootstrap Capacitor Selection
        5. 8.2.2.5 VREG5 Capacitor Selection
        6. 8.2.2.6 Output Voltage Setting Resistors Selection
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Considerations
      1. 10.1.1 Thermal Information
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

6.5 Electrical Characteristics

over recommended free-air temperature range, VVIN = 12 V, PGND = GND (unless otherwise noted). (2)
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
SUPPLY CURRENT
IVCCOperating, non-switching supply currentTA = 25°C, VEN = 5 V, VVFB = 0.8 V8501300µA
IVCC(sdn)Shutdown supply currentTA = 25°C, VEN = 0 V1.810µA
LOGIC THRESHOLD
VENHEN high-level input voltage

1.5

V
VENLEN low-level input voltage0.4V
VVFB VOLTAGE AND DISCHARGE RESISTANCE
VVFBVoltage light load modeTA = 25°C, VOUT = 1.05 V, IOUT = 10 mA771mV
Threshold voltage, continuous modeTA = 25°C, VOUT = 1.05 V757765773mV
TA = 0°C to 85°C, VOUT = 1.05 V(1)753777
TA = –40°C to 85°C, VOUT = 1.05 V(1)751779
IVFBInput currentVFB = 0.8 V, TA = 25°C-0.100.1µA
RDischgVO discharge resistanceVEN = 0 V, VOUT = 0.5 V, TA = 25°C50100Ω
VVREG5 OUTPUT
VVREG5Output voltageTA = 25°C, 6 V < VVCC < 18 V, 0 < IVREG5 < 5 mA5.35.55.7V
VLN5Line regulation6 V < VVCC < 18 V, IVREG5 = 5 mA20mV
VLD5Load regulation0 < IVREG5 < 5 mA100mV
IVREG5Output currentVcc = 6 V, VVREG5 = 4 V, TA = 25°C70mA
MOSFET
RDS(on)HHigh-side switch resistanceTA = 25°C, (VBST–VSW) = 5.5 V120mΩ
RDS(on)LLow-side switch resistanceTA = 25°C70mΩ
CURRENT LIMIT
IOCLCurrent limitLOUT = 1.5 µH(1)1.652.002.75A
THERMAL SHUTDOWN
TSDNThermal shutdown thresholdShutdown temperature(1)150°C
Hysteresis(1)25
ON-TIME TIMER CONTROL
tONOn timeVVIN = 12 V, VOUT = 1.05 V145ns
tOFF(min)Minimum off timeTA = 25°C, VVFB = 0.7 V260310ns
SOFT-START FUNCTION
ISSCSoft-start charge currentVSS = 0 V1.42.02.6µA
ISSDSoft-start discharge currentVSS = 0.5 V0.10.2mA
POWER GOOD
VTHPG(UV)Power-good undervoltage thresholdVVFB rising (good)85%90%95%
VVFB falling (fault)85%
VTHPG(OV)Power-good overvoltage thresholdVVFB rising (fault)110%115%120%
VVFB falling (good)110%
IPGSink currentVPG = 0.5 V2.55.0mA
OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION
VOVPOutput OVP trip thresholdOVP detect110%115%120%
tOVPDELOutput OVP propagation delay5µs
VUVPOutput UVP trip thresholdUVP detect65%70%75%
Hysteresis10%
tUVPDELOutput UVP delay0.25ms
tUVPENOutput UVP enable delayRelative to soft-start timetSS × 1.7
UNDERVOLTAGE LOCKOUT
UVLOWakeup VREG5 voltage threshold3.553.804.05V
Hysteresis VREG5 voltage threshold0.230.350.47
(1) Specified by design. Not production tested.
(2) See PS pin description for levels.