ZHCS920B May   2012  – April 2021 TPS54525

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  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
      4. 7.3.4  Power Good
      5. 7.3.5  VREG5
      6. 7.3.6  Output Discharge Control
      7. 7.3.7  Current Protection
      8. 7.3.8  Over/Under Voltage Protection
      9. 7.3.9  UVLO Protection
      10. 7.3.10 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Forced CCM Mode
  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 Step By Step Design Procedure
        2. 8.2.2.2 Output Voltage Resistors Selection
        3. 8.2.2.3 Output Filter Selection
        4. 8.2.2.4 Input Capacitor Selection
        5. 8.2.2.5 Bootstrap Capacitor Selection
        6. 8.2.2.6 VREG5 Capacitor Selection
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Guidelines
      1. 10.2.1 Thermal Considerations
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 第三方产品免责声明
    2. 11.2 接收文档更新通知
    3. 11.3 支持资源
    4. 11.4 Trademarks
    5. 11.5 静电放电警告
    6. 11.6 术语表

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

6.5 Electrical Characteristics

over operating free-air temperature range, VIN = 12V (unless otherwise noted)
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
SUPPLY CURRENT
IVINOperating - non-switching supply currentVIN current, TA = 25°C, EN = 5 V,
VVFB = 0.8 V		9001400μA
IVINSDNShutdown supply currentVIN current, TA = 25°C, EN = 0 V3.610μA
LOGIC THRESHOLD
VENHEN high-level input voltage1.6V
VENLEN low-level input voltage0.6V
RENEN pin resistance to GNDVEN = 12 V220440880kΩ
VFB VOLTAGE AND DISCHARGE RESISTANCE
VFBTHVFB threshold voltageTA = 25°C, VO = 1.05 V, continuous mode757765773mV
TA = –40°C to 85°C, VO = 1.05 V, continuous mode(1)754776
IVFBVFB input currentVVFB = 0.8 V, TA = 25°C0±0.15μA
RDischgVO discharge resistanceVEN = 0 V, VO = 0.5 V, TA = 25°C50100Ω
VREG5 OUTPUT
VVREG5VREG5 output voltageTA = 25°C, 6.0 V < VIN < 18 V,
0 < IVREG5 < 5 mA		5.25.55.7V
VVREG5VREG5 Line regulation6.0 V < VIN < 18 V, IVREG5 = 5 mA20mV
VVREG5VREG5 Load regulation0 mA < IVREG5 < 5 mA100mV
IVREG5VREG5 Output currentVIN = 6 V, VVREG5 = 4 V, TA = 25°C60mA
MOSFET
RdsonhHigh side switch resistanceTA = 25°C, VBST - VSW1,2 = 5.5 V63mΩ
RdsonlLow side switch resistanceTA = 25°C33mΩ
CURRENT LIMIT
IoclCurrent limitLOUT = 1.5 μH(1)6.16.98.4A
THERMAL SHUTDOWN
TSDNThermal shutdown thresholdShutdown temperature (1)165°C
Hysteresis (1)35
ON-TIME TIMER CONTROL
TONOn timeVIN = 12 V, VO = 1.05 V155ns
TOFF(MIN)Minimum off timeTA = 25°C, VVFB = 0.7 V260330ns
SOFT START
ISSCSS charge currentVSS = 1 V4.26.07.8μA
ISSDSS discharge currentVSS = 0.5 V0.10.2mA
POWER GOOD
VTHPGPG thresholdVVFB rising (good)859095%
VVFB falling (fault)85%
IPGPG sink currentVPG = 0.5 V2.55mA
OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION
VOVPOutput OVP trip thresholdOVP detect120125130%
TOVPDELOutput OVP prop delay10μs
VUVPOutput UVP trip thresholdUVP detect606570%
Hysteresis10%
TUVPDELOutput UVP delay0.25ms
TUVPENOutput UVP enable delayRelative to soft-start timex 1.7
UVLO
VUVLOUVLO thresholdWake up VREG5 voltage3.313.613.91V
Fall VREG5 voltage2.823.123.42
Hysteresis VREG5 voltage0.370.490.61
(1) Not production tested.