JAJSCB6B May   2016  – April 2021 TPS54302

PRODUCTION DATA  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
  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 Timing Requirements
    7. 6.7 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  Fixed-Frequency PWM Control
      2. 7.3.2  Pulse Skip Mode
      3. 7.3.3  Error Amplifier
      4. 7.3.4  Slope Compensation and Output Current
      5. 7.3.5  Enable and Adjusting Undervoltage Lockout
      6. 7.3.6  Safe Startup into Pre-Biased Outputs
      7. 7.3.7  Voltage Reference
      8. 7.3.8  Adjusting Output Voltage
      9. 7.3.9  Internal Soft-Start
      10. 7.3.10 Bootstrap Voltage (BOOT)
      11. 7.3.11 Overcurrent Protection
        1. 7.3.11.1 High-Side MOSFET Overcurrent Protection
        2. 7.3.11.2 Low-Side MOSFET Overcurrent Protection
      12. 7.3.12 Spread Spectrum
      13. 7.3.13 Output Overvoltage Protection (OVP)
      14. 7.3.14 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Normal Operation
      2. 7.4.2 Eco-mode™ Operation
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 TPS54302 8-V to 28-V Input, 5-V Output Converter
      2. 8.2.2 Design Requirements
      3. 8.2.3 Detailed Design Procedure
        1. 8.2.3.1 Input Capacitor Selection
        2. 8.2.3.2 Bootstrap Capacitor Selection
        3. 8.2.3.3 Output Voltage Set Point
        4. 8.2.3.4 Undervoltage Lockout Set Point
        5. 8.2.3.5 Output Filter Components
          1. 8.2.3.5.1 Inductor Selection
          2. 8.2.3.5.2 Output Capacitor Selection
          3. 8.2.3.5.3 Feedforward Capacitor
      4. 8.2.4 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    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 サポート・リソース
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

パッケージ・オプション

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発注情報

6.5 Electrical Characteristics

The electrical ratings specified in this section apply to all specifications in this document, unless otherwise noted. These specifications are interpreted as conditions that do not degrade the device parametric or functional specifications for the life of the product containing it. TJ = –40°C to +125°C, VIN = 4.5 V to 28 V, (unless otherwise noted).
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
INPUT SUPPLY
VINInput voltage range4.528V
IQNon switching quiescent currentEN = 5 V, VFB = 1 V45µA
IOFFShut down currentEN = GND2µA
VIN(UVLO)VIN under voltage lockoutRising VIN3.84.14.4V
Falling VIN3.33.63.9V
Hysteresis400480560mV
ENABLE (EN PIN)
VENrisingEnable thresholdRising1.211.28V
VENfallingFalling1.11.19V
I(EN_INPUT)Input currentVEN = 1 V0.7μA
I(EN_HYS)Hysteresis currentVEN = 1.5 V1.55μA
FEEDBACK AND ERROR AMPLIFIER
VFBFeedback VoltageVIN = 12 V0.5810.5960.611V
PULSE SKIP MODE
I(SKIP)(1)Pulse skip mode peak inductor current thresholdVIN = 12 V, VOUT = 5 V, L = 10 µH500mA
POWER STAGE
R(HSD)High-side FET on resistanceTA = 25°C, VBST – SW = 6 V85mΩ
R(LSD)Low-side FET on resistanceTA = 25°C, VIN = 1240mΩ
CURRENT LIMIT
I(LIM_HS)High-side current limitMaximum inductor peak current455.9A
I(LIM_LS)Low-side source current limitMaximum inductor valley current3.145.5A
OSCILLATOR
fSWCentre switching frequency290400510kHz
OVERTEMPERATURE PROTECTION
Thermal Shutdown(1)Rising temperature165°C
Hysteresis10°C
Hiccup time32768Cycles
(1) Not production tested