ZHCSE11A June   2015  – June 2015 TPS62745 , TPS627451

PRODUCTION DATA.  

  1. 特性
  2. 应用
  3. 说明
  4. 典型应用电路原理图
  5. 修订历史记录
  6. Device Comparison Table
  7. Pin Configuration and Functions
  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 Timing Characteristics
    7. 8.7 Typical Characteristics
  9. Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 DCS-Control™
      2. 9.3.2 Enable / Shutdown
      3. 9.3.3 Power Good Output (PG)
      4. 9.3.4 Output Voltage Selection (VSEL1 - 4)
      5. 9.3.5 Input Voltage Switch
    4. 9.4 Device Functional Modes
      1. 9.4.1 Soft Start
    5. 9.5 VOUT Discharge
    6. 9.6 Internal Current Limit
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Output Voltage Selection (VSEL1 - 4)
        2. 10.2.2.2 Output Filter Design (Inductor and Output Capacitor)
        3. 10.2.2.3 Inductor Selection
        4. 10.2.2.4 DC/DC Output Capacitor Selection
        5. 10.2.2.5 Input Capacitor Selection
      3. 10.2.3 Application Curves
    3. 10.3 System Examples
      1. 10.3.1 TPS62745 Set to a Fixed Voltage of 3.3 V
        1. 10.3.1.1 Design Requirements
        2. 10.3.1.2 Detailed Design Procedure
        3. 10.3.1.3 Application Curves
      2. 10.3.2 Dynamic Voltage Change on TPS62745
        1. 10.3.2.1 Design Requirements
        2. 10.3.2.2 Detailed Design Procedure
        3. 10.3.2.3 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 器件支持
      1. 13.1.1 Third-Party Products Disclaimer
    2. 13.2 相关链接
    3. 13.3 社区资源
    4. 13.4 商标
    5. 13.5 静电放电警告
    6. 13.6 Glossary
  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

TPS62745 TPS627451 TPS62745_pinout_2x3_DSS_V12.gif

Pin Functions

PIN I/O DESCRIPTION
NAME NO.
VIN 1 PWR VIN power supply pin. Connect this pin close to the VIN terminal of the input capacitor. A ceramic capacitor of 4.7 µF from this pin to GND is required.
SW 2 OUT This is the switch pin which is connected to the internal MOSFET switches. Connect the inductor to this terminal.
GND 3 PWR GND supply pin. Connect this pin close to the GND terminal of the input and output capacitor.
EN_VIN_SW 4 IN This pin connects / disconnects the internal switch from VIN to pin VIN_SW. With EN_VIN_SW = Low, the switch is open. With EN_VIN_SW = High, the switch is closed connecting VIN with VIN_SW. If not used, the pin should be tied to GND.
VOUT 5 IN Feedback pin for the internal feedback divider network and regulation loop. Connect this pin directly to the output capacitor with a short trace.
VIN_SW 6 OUT This is the output of a switch connecting VIN with VIN_SW when EN_VIN_SW = High. If not used, leave this pin open.
PG 7 OUT This is an open drain power good output.
VSEL4 8 IN Output voltage selection pins. See Table 1 and Table 2 for VOUT selection. These pins must be terminated.
VSEL3 9 IN
VSEL2 10 IN
VSEL1 11 IN
EN 12 IN High level enables the devices, low level turns the device into shutdown mode. This pin must be terminated.
EXPOSED THERMAL PAD NC Not electrically connected to the IC. Connect this pad to GND and use it as a central GND plane.

Table 1. Output Voltage Setting for TPS62745

Device VOUT / V VSEL4 VSEL 3 VSEL 2 VSEL 1
TPS62745 1.8 0 0 0 0
1.9 0 0 0 1
2.0 0 0 1 0
2.1 0 0 1 1
2.2 0 1 0 0
2.3 0 1 0 1
2.4 0 1 1 0
2.5 0 1 1 1
2.6 1 0 0 0
2.7 1 0 0 1
2.8 1 0 1 0
2.9 1 0 1 1
3.0 1 1 0 0
3.1 1 1 0 1
3.2 1 1 1 0
3.3 1 1 1 1

Table 2. Output Voltage Setting for TPS627451

Device VOUT / V VSEL4 VSEL 3 VSEL 2 VSEL 1
TPS627451 1.3 0 0 0 0
1.4 0 0 0 1
1.5 0 0 1 0
1.6 0 0 1 1
1.7 0 1 0 0
1.8 0 1 0 1
1.9 0 1 1 0
2.0 0 1 1 1
2.1 1 0 0 0
2.2 1 0 0 1
2.3 1 0 1 0
2.4 1 0 1 1
2.5 1 1 0 0
2.6 1 1 0 1
2.7 1 1 1 0
2.8 1 1 1 1