ZHCSL68C April 2017 – December 2020 TPS7A84A
PRODUCTION DATA
- 1 特性
- 2 應用
- 3 說明
- 4 Revision History
- 5 Pin Configuration and Functions
-
6 Specifications
- 6.1 Absolute Maximum Ratings
- 6.2 ESD Ratings
- 6.3 Recommended Operating Conditions
- 6.4 Thermal Information
- 6.5 Electrical Characteristics: General
- 6.6 Electrical Characteristics: TPS7A8400A
- 6.7 Electrical Characteristics: TPS7A8401A
- 6.8 Typical Characteristics: TPS7A8400A
- 6.9 Typical Characteristics: TPS7A8401A
- 7 Detailed Description
-
8 Application and Implementation
- 8.1
Application Information
- 8.1.1
External Component Selection
- 8.1.1.1 Adjustable Operation
- 8.1.1.2 ANY-OUT Programmable Output Voltage
- 8.1.1.3 ANY-OUT Operation
- 8.1.1.4 Increasing ANY-OUT Resolution for LILO Conditions
- 8.1.1.5 Current Sharing
- 8.1.1.6 Recommended Capacitor Types
- 8.1.1.7 Input and Output Capacitor Requirements (CIN and COUT)
- 8.1.1.8 Feed-Forward Capacitor (CFF)
- 8.1.1.9 Noise-Reduction and Soft-Start Capacitor (CNR/SS)
- 8.1.2 Start-Up
- 8.1.3 AC and Transient Performance
- 8.1.4 DC Performance
- 8.1.5 Sequencing Requirements
- 8.1.6 Negatively Biased Output
- 8.1.7 Reverse Current Protection
- 8.1.8 Power Dissipation (PD)
- 8.1.1
External Component Selection
- 8.2 Typical Applications
- 8.1
Application Information
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
8.1.7 Reverse Current Protection
As with most LDOs, this device can be damaged by excessive reverse current.
Reverse current is current that flows through the body diode on the pass element instead of the normal conducting channel. This current flow, at high enough magnitudes, degrades long-term reliability of the device resulting from risks of electromigration and excess heat being dissipated across the device. If the current flow gets high enough, a latch-up condition can be entered.
Conditions where excessive reverse current can occur are outlined in this section, all of which can exceed the absolute maximum rating of VOUT > VIN + 0.3 V:
- If the device has a large COUT and the input supply collapses quickly with little or no load current,
- The output is biased when the input supply is not established, or
- The output is biased above the input supply.
Figure 8-13 Example Circuit for Reverse Current Protection Using a Schottky Diode