ZHCS342B November   2013  – July 2014 TPS62740 , TPS62742

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用范围
  3. 3 说明
  4. 4 典型应用
  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 Handling Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Typical Characteristics
  9. 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 CTRL / Output Load
      3. 9.3.3 Enable / Shutdown
      4. 9.3.4 Power Good Output (PG)
      5. 9.3.5 Output Voltage Selection (VSEL1 - 4)
      6. 9.3.6 Softstart
      7. 9.3.7 Undervoltage Lockout UVLO
    4. 9.4 Device Functional Modes
      1. 9.4.1 VOUT And LOAD Output Discharge
      2. 9.4.2 Automatic Transition Into 100% Mode
      3. 9.4.3 Internal Current Limit
      4. 9.4.4 Dynamic Voltage Scaling with VSEL Interface
  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 Inductor Selection
        2. 10.2.2.2 DC/DC Output Capacitor Selection
        3. 10.2.2.3 Input Capacitor Selection
      3. 10.2.3 Application Curves
    3. 10.3 System Example
  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 第三方产品免责声明
    2. 13.2 文档支持
      1. 13.2.1 相关文档　
    3. 13.3 相关链接
    4. 13.4 商标
    5. 13.5 静电放电警告
    6. 13.6 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

WSON PACKAGE
12-Pin
TPS62740 TPS62742 TPS62740_pinout_2x3_SON_rev1.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 4.7µF is required.
SW 2 OUT This is the switch pin and 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.
CTRL 4 IN This pin controls the output LOAD pin. With CTRL = low, the output LOAD is disabled. This pin must be terminated.
VOUT 5 IN Feedback pin for the internal feedback divider network and regulation loop. An internal load switch is connected between this pin and the LOAD pin. Connect this pin directly to the output capacitor with a short trace.
LOAD 6 OUT This output is controlled by the CTRL Pin. With CTRL high, an internal load switch connects the LOAD pin to the VOUT pin. The LOAD pin allows to connect / disconnect other system components to the output of the DC/DC converter. This pin is pulled to GND with CTRL pin = low. The LOAD pin features a soft switching. If not used, leave the pin open.
PG 7 OUT Power good open drain output. This pin is high impedance to indicate "Power Good". Connect a external pull up resistor to generate a "high" level. If not used, this pin can be left open.
VSEL4 8 IN Output voltage selection pins. See Table 1 for VOUT selection. These pins must be terminated and can be changed during operation.
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, but must be soldered. Connect this pad to GND and use it as a central GND plane.

Table 1. Output Voltage Setting

Device VOUT VSEL 4 VSEL 3 VSEL 2 VSEL 1
TPS62740 / 42 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