ZHCSSE5B July   2014  – September 2023 LV284

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Revision History
  6. 5 Pin Configuration
  7. 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
  8. 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 Bootstrap Voltage (CB)
      3. 7.3.3 Setting the Ouput Voltage
      4. 7.3.4 Enable (SHDN) and VIN Undervoltage Lockout
      5. 7.3.5 Current Limit
      6. 7.3.6 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Continuous Conduction Mode
      2. 7.4.2 Eco-mode
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 5 V Output Application
        1. 8.2.1.1 Design Requirements
          1. 8.2.1.1.1 Design Guide – Step By Step Design Procedure
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Output Inductor Selection
          2. 8.2.1.2.2 Output Capacitor Selection
          3. 8.2.1.2.3 Schottky Diode Selection
          4. 8.2.1.2.4 Input Capacitor Selection
          5. 8.2.1.2.5 Bootstrap Capacitor Selection
        3. 8.2.1.3 Application Performance Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 接收文档更新通知
    2. 9.2 支持资源
    3. 9.3 Trademarks
    4. 9.4 静电放电警告
    5. 9.5 术语表
  11. 10Mechanical, Packaging, and Orderable Information

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订购信息

6.5 Electrical Characteristics

VIN = 12 V, SHDN = VIN, TJ = 25°C, unless otherwise noted.

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VIN (INPUT POWER SUPPLY)
Operating input voltage   4 40 V
Shutdown supply current EN = 0 V 1 3 µA
Undervoltage lockout thresholds Rising 4 V
Falling 3 V
IQ Eco-mode, no load, VIN = 12 V, not switching 30 µA
SHDN AND UVLO
Rising SHDN Threshold Voltage 1.05 1.25 1.38 V
SHDN PIN current SHDN = 2.3 V -4.2 µA
SHDN = 0.9 V -1
Hysteresis current -3 µA
HIGH-SIDE MOSFET
On-resistance VIN = 12 V, CB to SW = 5.8 V 500 mΩ
tON-MIN(1) 95 ns
DMAX : Maximum duty cycle(1) 96%
VFB : Feedback voltage 0.74 0.765 0.79 V
CURRENT LIMIT
Current limit threshold VIN = 12 V 1500 mA
ƒSW Switching frequency 550 700 850 kHz
THERMAL PERFORMANCE
TSHUTDOWN Thermal shutdown trip point(1) 170 °C
THYS(1) Hysteresis 10 °C
(1) Specified by design.