JAJSCW5 December   2016 TMP708-Q1

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
  4. 4 改訂履歴
  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 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 Temperature Switch
      2. 7.3.2 Hysteresis Input
      3. 7.3.3 Set-Point Resistor (RSET)
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Thermal Considerations
  11. 11デバイスおよびドキュメントのサポート
    1. 11.1 ドキュメントの更新通知を受け取る方法
    2. 11.2 コミュニティ・リソース
    3. 11.3 商標
    4. 11.4 静電気放電に関する注意事項
    5. 11.5 用語集
  12. 12メカニカル、パッケージ、および注文情報

10 Layout

10.1 Layout Guidelines

The TMP708-Q1 is extremely simple to lay out. Figure 7 shows the recommended board layout.

10.2 Layout Example

TMP708-Q1 TMP70x_Layout.gif Figure 7. Recommended Layout

10.3 Thermal Considerations

The TMP708-Q1 quiescent current is typically 40 μA. The device dissipates negligible power when the output drives a high-impedance load. Thus, the die temperature is the same as the package temperature. In order to maintain accurate temperature monitoring, provide a good thermal contact between the TMP708-Q1 package and the device being monitored. The rise in die temperature as a result of self-heating is given by Equation 2:

Equation 2. ΔTJ = PDISS × θJA

where

  • PDISS = power dissipated by the device.
  • θJA = package thermal resistance. Typical thermal resistance for SOT-23 package is 217.9°C/W.

To limit the effects of self-heating, keep the output current at a minimum level.