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  • TPS798-Q1 汽车 50mA、3V 至 50V、微功耗、低压降线性稳压器

    • ZHCSU17F March   2009  – April 2024 TPS798-Q1

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  • TPS798-Q1 汽车 50mA、3V 至 50V、微功耗、低压降线性稳压器
  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Dissipation Ratings
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagrams
    3. 6.3 Feature Description
      1. 6.3.1 Adjustable Operation
      2. 6.3.2 Output Capacitance and Transient Response
      3. 6.3.3 Calculating Junction Temperature
      4. 6.3.4 Protection Features
    4. 6.4 Device Functional Modes
      1. 6.4.1 Low-Voltage Tracking
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
      1. 7.3.1 Thermal Considerations
      2. 7.3.2 Thermal Layout Considerations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 接收文档更新通知
    2. 8.2 支持资源
    3. 8.3 Trademarks
    4. 8.4 静电放电警告
    5. 8.5 术语表
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information
  12. 重要声明
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Data Sheet

TPS798-Q1 汽车 50mA、3V 至 50V、微功耗、低压降线性稳压器

本资源的原文使用英文撰写。 为方便起见，TI 提供了译文；由于翻译过程中可能使用了自动化工具，TI 不保证译文的准确性。 为确认准确性，请务必访问 ti.com 参考最新的英文版本（控制文档）。

下载最新的英语版本

1 特性

  • 符合面向汽车应用的 AEC-Q100 标准：
    • 温度等级 1：–40°C 至 +125°C，TA
  • 宽输入电压范围：3V 至 50V
  • 低静态电流：40μA（典型值）
  • 低压降：300mV（典型值）
  • 输出电流：50mA
  • 无需输入保护二极管
  • 可调输出：从 1.275V 至 28V
  • 关断时静态电流：1μA
  • 与 1μF 输出电容器一起工作时保持稳定
  • 与铝、钽或陶瓷电容器一起工作时保持稳定
  • 反向输入电池保护
  • 反向输出电流保护
  • 热限制
  • 采用 8 引脚 HVSSOP PowerPAD 器件封装

2 应用

  • 低电流、高压稳压器
  • 适用于电池供电系统的稳压器
  • 电信
  • 汽车
TPS798-Q1 典型应用典型应用

3 说明

TPS798-Q1 是 50V 高压微功耗低压降 (LDO) 线性稳压器系列中的首款器件。该器件能够提供 50mA 的输出电流，而压降电压仅为 300mV。TPS798-Q1 专为低静态电流高压 (50V) 应用而设计，具有 40μA 的工作电流和 1μA 的关断电流，因此非常适合电池供电或高压系统。静态电流在压降中也得到了很好的控制。

TPS798-Q1 的其他特性包括能够与低等效串联电阻 (ESR) 陶瓷输出电容器一起工作。该器件很稳定，输出端上仅为 1μF；大多数旧器件需要 10μF 至 100μF 钽电容器才能保持稳定性。与其他稳压器一同使用时的常见情况一样，在无需额外等效串联电阻 (ESR) 的前提下可使用小型陶瓷电容器。内部保护电路包括反向输入电池保护、反向输出电流保护、电流限制和热限制，以在各种故障情况下保护器件。

此器件提供 5V 固定输出电压 (TPS79850)，并具有基准电压为 1.275V 的可调输出电压 (TPS79801)。TPS798-Q1 稳压器采用带有外露焊盘的 8 引脚 HVSSOP PowerPAD (DGN) 封装，可增强热管理功能。

封装信息
器件型号 封装(1) 封装尺寸(2)
TPS798-Q1 DGN（HVSSOP，8） 3mm x 4.9mm
(1) 如需更多信息，请参阅机械、封装和可订购信息。
(2) 封装尺寸（长 × 宽）为标称值，并包括引脚（如适用）。

4 Pin Configuration and Functions

TPS798-Q1 DGN Package,8-Pin HVSSOP With PowerPAD (Top View)
The exposed thermal pad is connected to ground through pin 4 (GND).
Figure 4-1 DGN Package,8-Pin HVSSOP With PowerPAD™ (Top View)
Table 4-1 Pin Functions
PIN TYPE DESCRIPTION
NAME NO.
EN 5 I Enable pin. Driving the EN pin high turns on the regulator over full operating range. Driving this pin low puts the regulator into shutdown mode over full operating range.
GND 4 O Ground. The exposed thermal pad is connected to ground through this pin.
IN 8 I Input pin. Place a 0.1μF ceramic or greater capacitor from this pin to ground to provide stability. Both input and output capacitor grounds must be tied back to the device ground with no significant impedance between them.
NC 3, 6, 7 — No internal connection
OUT 1 O Regulated output voltage pin. A small (1μF) capacitor is needed from this pin to ground to provide stability.
SENSE/FB 2 I This pin is the input to the control loop error amplifier. Use this pin to set the output voltage of the device.

5 Specifications

5.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)
MINMAXUNIT
VINInput voltage rangeIN(2)–6560V
OUT–0.328
FB–0.37
EN(2)–6560
Enable to IN differential0.6VIN
TJJunction temperature range(3)–40125°C
TstgStorage temperature–65150°C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) Transient: 500ms for VIN > 50V.
(3) The junction temperature must not exceed 125°C. See Figure 5-13 to determine the maximum ambient operating temperature versus the supply voltage and load current. The safe operating area curves assume a 50°C/W thermal impedance and may need to be adjusted to match actual system thermal performance.

 
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