LM117QML
- Available with Radiation Ensured
- High Dose Rate 100 krad(Si)
- ELDRS Free 100 krad(Si)
- Specified max. 0.3% Load Regulation (LM117)
- 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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The LM117 series of adjustable 3-terminal positive voltage regulators is capable of supplying either 0.5A or 1.5A over a 1.2V to 37V output range. They are exceptionally easy to use and require 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.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | LM117QML 3-Terminal Adjustable Regulator datasheet (Rev. D) | 2013年 4月 16日 | |
Application note | A Topical Index of TI LDO Application Notes (Rev. F) | 2019年 6月 27日 | ||
Application note | AN-103 LM340 Series Three Terminal Positive Regulators (Rev. A) | 2013年 5月 6日 | ||
Application note | AN-1148 Linear Regulators: Theory of Operation and Compensation (Rev. B) | 2013年 5月 6日 | ||
Application note | Method For Cal Output Voltage Tolerances in Adj Regs (Rev. A) | 2013年 5月 5日 | ||
More literature | Die D/S LM117H MDE 3-Terminal Adj Regulator | 2012年 9月 13日 | ||
More literature | Die D/S LM117KG MD8 3-Terminal Adj Regulator | 2012年 9月 13日 | ||
Application note | Packaging Limits Range of Linear Regulators | 2010年 5月 8日 | ||
Application note | Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A) | 2008年 6月 4日 | ||
Application note | Understanding the Terms and Definitions of LDO Voltage Regulators | 1999年 10月 21日 |
設計與開發
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封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
---|---|---|
CFP (NAC) | 16 | Ultra Librarian |
DIESALE (Y) | — | |
LCCC (NAJ) | 20 | Ultra Librarian |
TO-CAN (K) | 2 | Ultra Librarian |
TO-CAN (NDT) | 3 | Ultra Librarian |
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