LM317M
- Adjustable output voltage range (VOUT): 1.25V to 37V
- Output current (IOUT): Up to 500mA
- Built-in, short-circuit current limiting and thermal protection
- Stable without any output capacitor
- Operating temperature range: –40°C to +125°C
- Packages:
- 4-pin, 6.5mm × 7mm SOT-223 (RθJA : 77.7°C/W)
- 3-pin, 6.6mm × 10.11mm TO-252 (RθJA : 31.7°C/W)
The LM317M and LM317MQ are adjustable three-pin, positive-voltage regulators capable of supplying an output current of 0.5A over an output voltage range of 1.25V to 37V. The device requires only two external resistors to set the output voltage. The device features a typical line regulation of 0.01% and typical load regulation of 0.1%. The device includes current limiting, thermal overload protection, and safe operating area protection.
The device is a floating regulator meaning there is no device ground terminal. Quiescent current flows to the load instead of being wasted flowing to ground. Regulated output voltage of hundreds of volts is possible if the maximum input to output differential does not exceed 40V at any time. The device functions as a floating current source controlled by a single resistor.
Additionally, the device does not need an output capacitor for stable operation across the load current range. Optionally, add an electrolytic or tantalum output capacitor to improve transient response. Ceramic output capacitors are available, but output ringing is potentially present on transients. Bypass the ADJUST pin with any type of capacitor to achieve high ripple-rejection ratios.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LM317M, LM317MQ 3-Pin Adjustable Regulators datasheet (Rev. Q) | PDF | HTML | 2025年 7月 25日 |
| Application note | LDO Noise Demystified (Rev. B) | PDF | HTML | 2020年 8月 18日 | |
| Application note | LDO PSRR Measurement Simplified (Rev. A) | PDF | HTML | 2017年 8月 9日 | |
| Application note | Method For Cal Output Voltage Tolerances in Adj Regs (Rev. A) | 2013年 5月 5日 | ||
| Application note | A New Production Technique for Trimming Voltage Regulators | 2002年 10月 3日 | ||
| Application note | Adjustable 3-Terminal Regulator for Low-Cost Battery Charging Systems | 2002年 10月 3日 |
設計與開發
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MLTLDO2EVM-037 — 適用於 DCY、DDA 和 KVU 封裝的通用 LDO 線性電壓穩壓器評估模組
MLTLDO2EVM-037 多重封裝低壓差 (LDO) 評估模組 (EVM) 可讓設計工程師評估多種常用線性穩壓器封裝的運作情形及性能，以利在自己的電路應用中使用。此 EVM 配置包含 DDA、3 針腳和 5 針腳 KVU，以及用於工程師焊接和評估其零件的 DCY 封裝板上配置。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-223 (DCY) | 4 | Ultra Librarian |
| TO-252 (KVU) | 3 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。