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1. Describe
LM317AEMPX/NOPB adjustable 3-terminal positive voltage Voltage regulator capable of supplying excess current 1.5A in the 1.25V to 37V output range, and Provide 1% output voltage accuracy. Two lines Better realization of regulation and load regulation Using LM317A equipment is better than using standard fixed Regulators. LM317A provides comprehensive overload protection, such as Overcurrent, thermal overload protection and safe area protection. All overload protection circuits Even if adjustments are made, it can still maintain full functionality The terminal is disconnected. Capacitors are usually not needed unless the equipment More than 6 inches from the input filter Capacitors need input bypass in this case. An optional output capacitor can be added to improve Transient response can be replaced by Ceramic and proper ESR. Adjustment The terminal can be bypassed to achieve a very high ripple rejection ratio, which is difficult to achieve Standard three-terminal regulator. Because the LM317A regulator is floating, check Only input to output differential voltage, supply A few hundred volts can be adjusted, as long as Maximum input to output differential is not exceeded. Exceed the maximum input and output Compliance will cause the output to short-circuit. go through Connect a fixed resistor between adjustments Pins and outputs, LM317A can also be used as Precision current regulator. For applications requiring greater output current, see LM150 series (3A) and LM138 series (5A) data sheet.
2. Features
1. For a newer drop-in alternative, see the LM317
2. Typical 0.005%/V line regulation
3. 1% output voltage tolerance
4. 1.5-A output current
5. Adjustable output down to 1.25 V
6. Input-output differential up to 40 V
7. Current limit constant with temperature
8. No output capacitor required
9. Short-circuit protected output
10. −40°C to 125°C operating temperature range
3. Applications
1. Automotive LED lighting
2. Battery chargers
3. Post regulation for switching supplies
4. Constant-current regulator
5. Microprocessor supplies
4. Pin configuration
5. Pin Functions
