ZHCS979F June   2012  – October 2020 TPS53318 , TPS53319

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  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
    7. 7.7 TPS53319 Typical Characteristics
    8. 7.8 TPS53318 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  5-V LDO and VREG Start-Up
      2. 8.3.2  Adaptive On-Time D-CAP Control and Frequency Selection
      3. 8.3.3  Ramp Signal
      4. 8.3.4  Adaptive Zero Crossing
      5. 8.3.5  Output Discharge Control
      6. 8.3.6  Power-Good
      7. 8.3.7  Current Sense, Overcurrent, and Short Circuit Protection
      8. 8.3.8  Overvoltage and Undervoltage Protection
      9. 8.3.9  Redundant Overvoltage Protection (OVP)
      10. 8.3.10 UVLO Protection
      11. 8.3.11 Thermal Shutdown
      12. 8.3.12 Small Signal Model
      13. 8.3.13 External Component Selection Using All Ceramic Output Capacitors
    4. 8.4 Device Functional Modes
      1. 8.4.1 Enable, Soft Start, and Mode Selection
      2. 8.4.2 Auto-Skip Eco-mode Light Load Operation
      3. 8.4.3 Forced Continuous Conduction Mode
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Application Using Bulk Output Capacitors, Redundant Overvoltage Protection Function (OVP) Disabled
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Step One: Select Operation Mode and Soft-Start Time
          2. 9.2.1.2.2 Step Two: Select Switching Frequency
          3. 9.2.1.2.3 Step Three: Choose the Inductor
          4. 9.2.1.2.4 Step Four: Choose the Output Capacitor or Capacitors
          5. 9.2.1.2.5 Step Five: Determine the Value of R1 and R2
          6. 9.2.1.2.6 Step Six: Choose the Overcurrent Setting Resistor
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Application Using Ceramic Output Capacitors, Redundant Overvoltage Protection Function (OVP) Enabled
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
          1. 9.2.2.2.1 External Component Selection Using All Ceramic Output Capacitors
          2. 9.2.2.2.2 Redundant Overvoltage Protection
        3. 9.2.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Development Support
    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

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

7.5 Electrical Characteristics

Over recommended free-air temperature range, VVDD = 12 V (unless otherwise noted)
PARAMETERCONDITIONSMINTYPMAXUNIT
SUPPLY CURRENT
VVINVIN pin power conversion input voltage1.522V
VVDDSupply input voltage4.525.0V
IVIN(leak)VIN pin leakage currentVEN = 0 V1µA
IVDDVDD supply currentTA = 25°C, No load, VEN = 5 V, VVFB = 0.630 V420590µA
IVDDSDNVDD shutdown currentTA = 25°C, No load, VEN = 0 V110µA
INTERNAL REFERENCE VOLTAGE
VVFBVFB regulation voltageCCM condition(1)0.600V
VVFBVFB regulation voltageTA = 25°C0.5970.6000.603V
0°C ≤ TA ≤ 85°C0.59520.6000.6048
–40°C ≤ TA ≤ 85°C0.5940.6000.606
IVFBVFB input currentVVFB = 0.630 V, TA = 25°C0.010.20µA
LDO OUTPUT
VVREGLDO output voltage0 mA ≤ IVREG ≤ 30 mA4.775.005.36V
IVREGLDO output current(1)Maximum current allowed from LDO30mA
VDOLow drop out voltageVVDD = 4.5 V, IVREG = 30 mA250mV
BOOT STRAP SWITCH
VFBSTForward voltageVVREG-VBST, IF = 10 mA, TA = 25°C0.10.2V
IVBSTLKVBST leakage currentVVBST = 23 V, VSW = 17 V, TA = 25°C0.011.50µA
DUTY AND FREQUENCY CONTROL
tOFF(min)Minimum off-timeTA = 25°C150260400ns
tON(min)Minimum on-timeVIN = 17 V, VOUT = 0.6 V, fSW = 1 MHz,
TA = 25 °C(1)		35ns
SOFT-START TIMING
tSSInternal soft-start time from
VOUT = 0 V to 95% of VOUT		RMODE = 39 kΩ0.7ms
RMODE = 100 kΩ1.4
RMODE = 200 kΩ2.8
RMODE = 470 kΩ5.6
OUTPUT VOLTAGE DISCHARGE
IDSCHGOutput voltage discharge currentVEN = 0 V, VSW = 0.5 V5.06.69.0mA
POWERGOOD
VTHPGPG thresholdPG in from lower92.5%95.0%98.5%
PG in from higher107.5%110.0%112.5%
PG hysteresis2.5%5.0%7.5%
RPGPG transistor on-resistance153060Ω
tPGDELPG delayDelay for PG in0.811.2ms
LOGIC THRESHOLD AND SETTING CONDITIONS
VENEN VoltageEnable1.01.31.6V
Disable0.81.01.2
IENEN Input currentVEN = 5 V1.0µA
fSWSwitching frequencyRRF = 0 Ω to GND, TA = 25°C(2)200250300kHz
RRF = 187 kΩ to GND, TA = 25°C(2)250300350
RRF = 619 kΩ, to GND, TA = 25°C(2)350400450
RRF = Open, TA = 25°C(2)450500550
RRF = 866 kΩ to VREG, TA = 25°C(2)540600660
RRF = 309 kΩ to VREG, TA = 25°C(2)670750820
RRF = 124 kΩ to VREG, TA = 25°C(2)770850930
RRF = 0 Ω to VREG, TA = 25°C(2)8809701070
PROTECTION: CURRENT SENSE
ITRIPTRIP source currentVTRIP = 1 V, TA = 25°C10µA
TCITRIPTRIP current temperature coefficientOn the basis of 25°C(2)3000ppm/°C
VTRIPCurrent limit threshold setting rangeTPS53318VTRIP-GND0.41.5V
TPS533192.4
VOCLCurrent limit thresholdVTRIP = 1.2 V37.5mV
VTRIP = 0.412.5
VOCLNNegative current limit thresholdVTRIP = 1.2 V–37.5mV
VTRIP = 0.4 V–12.5
IOCPValley current limit thresholdRTRIP = 66.5 kΩ, 0°C ≤ TA ≤ 125°C4.65.46.3A
RTRIP = 66.5 kΩ, –40°C ≤ TA ≤ 125°C4.45.46.3
VAZCADJAuto zero cross adjustable rangePositive315mV
Negative–15–3
PROTECTION: UVP and OVP
VOVPOVP trip thresholdOVP detect115%120%125%
tOVPDELOVP propagation delayVFB delay with 50-mV overdrive1µs
VUVPOutput UVP trip thresholdUVP detect65%70%75%
tUVPDELOutput UVP propagation delay0.81.01.2ms
tUVPENOutput UVP enable delayFrom enable to UVP workable1.52.33.0ms
UVLO
VUVVREGVREG UVLO thresholdWake up4.004.204.33V
Hysteresis0.25
PROTECTION: UVP and OVP
VOVPOVP trip thresholdOVP detect115%120%125%
tOVPDELOVP propagation delayVFB delay with 50-mV overdrive1µs
VUVPOutput UVP trip thresholdUVP detect65%70%75%
tUVPDELOutput UVP proprogation delay0.81.01.2ms
tUVPENOutput UVP enable delayFrom enable to UVP workable1.52.33.0ms
UVLO
VUVVREGVREG UVLO thresholdWake up4.004.204.33V
Hysteresis0.25
THERMAL SHUTDOWN
TSDNThermal shutdown thresholdShutdown temperature(2)145°C
Hysteresis(2)10
(1) Ensured by design. Not production tested.
(2) Not production tested. Test condition is VIN = 12 V, VOUT = 1.2 V, IOUT = 5 A using application circuit shown in Figure 9-12.