SLVS389M September 2002 – September 2015 TPS786
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Detailed Description
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
封裝選項
機械數據 (封裝 | 引腳)
散熱焊盤機械數據 (封裝 | 引腳)
訂購信息
7 Detailed Description
7.1 Overview
The TPS786 family of low-dropout regulators offers low dropout voltages, high PSRR, and low-output noise.
7.2 Functional Block Diagrams
7.3 Feature Description
7.3.1 Regulator Protection
The TPS786 PMOS-pass transistor has a built-in back diode that conducts reverse current when the input voltage drops below the output voltage (for example, during power down). Current is conducted from the output to the input and is not internally limited. If extended reverse voltage operation is anticipated, external limiting might be appropriate.
The TPS786 features internal current limiting and thermal protection. During normal operation, the TPS786 limits output current to approximately 2.8 A. When current limiting engages, the output voltage scales back linearly until the overcurrent condition ends. While current limiting is designed to prevent gross device failure, take care not to exceed the power dissipation ratings of the package. If the temperature of the device exceeds approximately 165°C, thermal-protection circuitry shuts it down. Once the device has cooled down to below approximately 140°C, regulator operation resumes.
7.4 Device Functional Modes
Driving EN over 1.7 V turns on the regulator. Driving EN below 0.7 V puts the regulator into shutdown mode, thus reducing the operating current to 70 nA, nominal.