ZHCSDK9A March   2015  – April 2015 TPS22953 , TPS22954

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 简化电路原理图
  5. 5 修订历史记录
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
  8. 8 Specifications
    1. 8.1  Absolute Maximum Ratings
    2. 8.2  ESD Ratings
    3. 8.3  Recommended Operating Conditions
    4. 8.4  Thermal Information
    5. 8.5  Electrical Characteristics
    6. 8.6  Electrical Characteristics, VBIAS = 5 V
    7. 8.7  Electrical Characteristics, VBIAS = 3.3 V
    8. 8.8  Electrical Characteristics, VBIAS = 2.5 V
    9. 8.9  Switching Characteristics, CT = 1000 pF
    10. 8.10 Switching Characteristics, CT = 0 pF
    11. 8.11 Typical DC Characteristics
    12. 8.12 Typical Switching Characteristics
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 On/Off Control (EN pin)
      2. 9.3.2 Voltage Monitoring (SNS pin)
      3. 9.3.3 Power Good (PG Pin)
      4. 9.3.4 Supervisor Fault Detection and Automatic Restart
      5. 9.3.5 Manual Restart
      6. 9.3.6 Thermal Shutdown
      7. 9.3.7 Quick Output Discharge (QOD) (TPS22954 Only)
      8. 9.3.8 VIN and VBIAS Voltage Range
      9. 9.3.9 Adjustable Rise Time (CT pin)
    4. 9.4 Device Functional Modes
  10. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 Input to OutputVoltage Drop
      2. 10.1.2 Thermal Considerations
      3. 10.1.3 Automatic Power Sequencing
      4. 10.1.4 Monitoring a Downstream Voltage
        1. 10.1.4.1 Monitoring the Input Voltage
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Inrush Current
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13器件和文档支持
    1. 13.1 相关链接
    2. 13.2 商标
    3. 13.3 静电放电警告
    4. 13.4 术语表
  14. 14机械封装和可订购信息

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 Pin Configuration and Functions

TPS22954 TPS22953 Pinout.gif

Pin Functions

PIN(1) I/O DESCRIPTION
NAME NO.
IN 1, 2 I Switch input. Bypass this input with a ceramic capacitor to GND.
BIAS 3 I Bias pin and power supply to the device.
EN 4 I Active high switch enable/disable input. Also acts as the input UVLO pin. Use external resistor divider to adjust the UVLO level. Do not leave floating.
GND 5 – Device ground.
CT 6 O VOUT slew rate control. Place ceramic cap from CT to GND to change the VOUT slew rate of the device and limit the inrush current. CT Capacitor should be rated to 25V or higher.
PG 7 O Power good. This pin is open drain which will pull low when the voltage on EN and/or SNS is below their respective VIL level.
SNS 8 I Sense pin. Use external resistor divider to adjust the power good level. Do not leave floating.
OUT 9, 10 O Switch output.
Thermal Pad – – Exposed thermal pad. Tie to GND.
(1) Pinout applies to all package versions.