LM117HV/LM317HV are adjustable 3-terminal positive voltage regulators capable of supplying in excess of 1.5A over a 1.2V to 57V output range. They are exceptionally easy to use and require only two external resistors to set the output voltage. Both line and load regulation are better than standard fixed regulators. The LM117HV is packaged in standard transistor packages which are easily mounted and handled. It offers full overload protection available only in IC’s, including current limit, thermal overload protection, and safe area protection. All overload protection circuitry remains fully functional even if the adjustment terminal is disconnected. Capacitors are not needed unless the device is situated more than 6 inches from the input filter capacitors, in which case an input bypass is needed. An optional output capacitor can be added to improve transient response. The adjustment terminal can be bypassed to achieve very high ripple rejection ratios which are difficult to achieve with standard 3-terminal regulators. Besides replacing fixed regulators, the LM117HV is useful in a wide variety of other applications. Supplies of several hundred volts can be regulated as long as the maximum input to output differential voltage is within the specified range.
The LM117HV/LM317HV series are adjustable 3‑terminal positive voltage regulators that can supply more than 1.5 A over a 1.2 V to 57 V output range. They require only two external resistors to set the output voltage and include built‑in current limit, thermal overload and safe‑area protection.
Typical applications include replacing fixed regulators, creating programmable output regulators, precision current sources, and high‑voltage supplies where the device is “floating”. The devices are offered in TO‑3, TO‑39, and TO‑220 packages and operate over wide temperature ranges.
| Output Current | 1.5 A |
|---|---|
| Line Regulation | 0.01 %/V (typical) |
| Load Regulation | 0.1 % (typical) |
| Ripple Rejection | 80 dB |
| Operating Temperature (LM117HV) | -55 °C to +150 °C |
| Operating Temperature (LM317HV) | 0 °C to +125 °C |
| Input‑Output Differential | +60 V, -0.3 V |
| Built‑in Protection | Current limit, thermal overload, safe‑area protection |
The typical line regulation is 0.01 % per volt.
A 0.1 µF disc or 1 µF solid tantalum capacitor on the input is suitable.
The device includes current limit, thermal overload protection, and safe‑area protection.
The regulators are guaranteed to deliver up to 1.5 A of output current.