LM117JAN - 3-Terminal Adjustable Regulator

LM117JAN是TI德州仪器公司的一款单通道LDO产品，LM117JAN是3-Terminal Adjustable Regulator，本站介绍了LM117JAN的封装应用图解、特点和优点、功能等，并给出了与LM117JAN相关的TI元器件型号供参考。

LM117JAN - 3-Terminal Adjustable Regulator - 单通道LDO - 线性稳压器(LDO) - 德州仪器

产品描述

The LM117 adjustable 3-terminal positive voltage regulator is capable of supplying either 0.5A or 1.5A over a 1.2V to 37V output range. It is exceptionally easy to use and requires only two external resistors to set the output voltage. Further, both line and load regulation are better than standard fixed regulators.

In addition to higher performance than fixed regulators, the LM117 series offers full overload protection available only in IC's. Included on the chip are current limit, thermal overload protection and safe area protection. All overload protection circuitry remains fully functional even if the adjustment terminal is disconnected.

Normally, no capacitors are 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 LM117 is useful in a wide variety of other applications. Since the regulator is “floating” and sees only the input-to-output differential voltage, supplies of several hundred volts can be regulated as long as the maximum input to output differential is not exceeded, i.e., avoid short-circuiting the output.

Also, it makes an especially simple adjustable switching regulator, a programmable output regulator, or by connecting a fixed resistor between the adjustment pin and output, the LM117 can be used as a precision current regulator. Supplies with electronic shutdown can be achieved by clamping the adjustment terminal to ground which programs the output to 1.2V where most loads draw little current.

For the negative complement, see LM137 series data sheet.

产品特性

Specified 0.5A or 1.5A Output Current
Adjustable Output Down to 1.2V
Current Limit Constant with Temperature
80 dB Ripple Rejection
Output is Short-circuit Protected

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