ZHCSHH4L March 2000 – January 2018 LM317L-N
PRODUCTION DATA.
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 修訂歷史記錄
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Detailed Description
-
8 Application and Implementation
- 8.1 Application Information
- 8.2
Typical Applications
- 8.2.1 1.25-V to 25-V Adjustable Regulator
- 8.2.2 Digitally-Selected Outputs
- 8.2.3 High Gain Amplifier
- 8.2.4 Adjustable Current Limiter
- 8.2.5 Precision Current Limiter
- 8.2.6 Slow Turnon 15-V Regulator
- 8.2.7 Adjustable Regulator With Improved Ripple Rejection
- 8.2.8 High Stability 10-V Regulator
- 8.2.9 Adjustable Regulator With Current Limiter
- 8.2.10 0-V to 30-V Regulator
- 8.2.11 Regulator With 15-mA Short-Circuit Current
- 8.2.12 Power Follower
- 8.2.13 Adjusting Multiple On-Card Regulators With Single Control
- 8.2.14 100-mA Current Regulator
- 8.2.15 1.2-V to 12-V Regulator With Minimum Program Current
- 8.2.16 50-mA Constant Current Battery Charger for Nickel-Cadmium Batteries
- 8.2.17 5-V Logic Regulator With Electronic Shutdown
- 8.2.18 Current-Limited 6-V Charger
- 8.2.19 Short Circuit-Protected 80-V Supply
- 8.2.20 Basic High-Voltage Regulator
- 8.2.21 Precision High-Voltage Regulator
- 8.2.22 Tracking Regulator
- 8.2.23 Regulator With Trimmable Output Voltage
- 8.2.24 Precision Reference With Short-Circuit Proof Output
- 8.2.25 Fully-Protected (Bulletproof) Lamp Driver
- 8.2.26 Lamp Flasher
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文檔支持
- 12機械、封裝和可訂購信息
封裝選項
機械數(shù)據(jù) (封裝 | 引腳)
散熱焊盤機械數(shù)據(jù) (封裝 | 引腳)
訂購信息
8.2.17 5-V Logic Regulator With Electronic Shutdown
Figure 33 shows a variation of the 5-V output regulator application uses the LM317L-N, along with an NPN transistor, to provide shutdown control. The NPN will either block or sink the current from the ADJ pin by responding to the TTL pin logic. When TTL is pulled high, the NPN is on and pulls the ADJ pin to GND, and the LM317L-N outputs about 1.25 V. When TTL is pulled low, the NPN is off and the regulator outputs according to the programmed adjustable voltage.
*Minimum output ≈ 1.2 V
Figure 33. 5-V Logic Regulator With Electronic Shutdown*