LM317LD13TR - 1.2-37V Adjustable LDO | STMicroelectronics
MPN： LM317LD13TR ✓ 啟用中LM317LD13TR 概覽
直接替換替代品，適用於 LM317LD13TR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： LM317LD13TR （相同外形與佔位） — 差異在於 Manufacturer, Package, RoHS Status.
LM217LD
✅ 直接替換📋 參考替代品（不在目錄中）
LM317LD13TR
✅ 直接替換聯絡詢價
查看資料表 →LM317LBDR2G
✅ 直接替換📋 參考替代品（不在目錄中）
LM317KCSE3
✅ 直接替換📋 參考替代品（不在目錄中）
LM2904BIDR
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →LM317LD13TR 最大額定值與電氣特性
| Regulator Type | Adjustable linear voltage regulator |
| Output Polarity | Positive |
| 輸出電壓範圍 | 1.2 V to 37 V |
| 輸入電壓範圍 | 5 V to 40 V |
| Output Current | 100 mA |
| Output Voltage Type | Adjustable / Variable |
| Line Regulation | 0.01% typical |
| Load Regulation | 0.1% typical |
| Protection | Thermal overload and short-circuit protection |
| 封裝 | 8-SOIC / SO-8 |
| 安裝類型 | Surface Mount |
| 生命週期狀態 | Active |
| 輸出配置 | Single output |
| Manufacturer | STMicroelectronics |
| Datasheet Description | Low current 1.2 to 37 V adjustable voltage regulator |
| Distributor Stock Example | 1,490 units in stock at LCSC |
| Verified Distributor Unit Price Example | From $0.0571 at LCSC |
| RoHS 狀態 | Unknown; not stated in verified data |
| REACH Status | Unknown; not stated in verified data |
| AEC-Q100 Status | Not stated in verified data |
LM317LD13TR 腳位配置
| 腳位 1 | ADJ — Adjustment input |
| 腳位 2 | OUT — Regulated output |
| 腳位 3 | IN — Input supply |
| 腳位 4 | NC — Not connected (per package convention; verify with manufacturer datasheet) |
| 腳位 5 | NC — Not connected (per package convention; verify with manufacturer datasheet) |
| 腳位 6 | NC — Not connected (per package convention; verify with manufacturer datasheet) |
| 腳位 7 | NC — Not connected (per package convention; verify with manufacturer datasheet) |
| 腳位 8 | NC — Not connected (per package convention; verify with manufacturer datasheet) |
典型應用
LM317LD13TR 適用於 6 應用s: Low-noise analog supply, Sensor excitation and reference circuits, Laboratory and educational power supply, Embedded control and instrumentation, Precision measurement front ends, Small industrial control boards.
Low-noise analog supply
The LM317LD13TR is suitable for powering small analog signal-conditioning circuits where low switching ripple and simple adjustment are more important than maximum conversion efficiency. Its 1.2 V to 37 V adjustable output covers common laboratory and control-rail voltages, while the external resistor network lets the designer select the required level. Place the input and output bypass capacitors close to the device and account for linear dissipation when VIN and VOUT differ substantially.
推薦
Sensor excitation and reference circuits
An adjustable LM317LD13TR can provide a compact reference or excitation rail for sensor front ends, particularly when the required voltage is stable but the current demand is modest. The 1.2 V minimum output and resistor-programmable design allow adaptation to different sensor ranges. Use the adjustment network with stable resistors and verify temperature drift and output accuracy in the final enclosure, where thermal gradients can affect precision measurements.
推薦
Laboratory and educational power supply
The LM317LD13TR is a straightforward choice for laboratory or educational supplies because the resistor adjustment method is easy to implement and troubleshoot. Its adjustable 1.2 V to 37 V output supports multiple benchrail experiments without requiring a complex digital control loop. Add current limiting, protection, and adequate heat spreading around the SO-8 package. For higher currents, choose a regulator variant and heatsink designed for the required dissipation.
推薦
Embedded control and instrumentation
The LM317LD13TR can generate a local adjustable rail for embedded controllers, transducers, or analog interface boards when the load is below the verified 100 mA listing. Its simple three-terminal topology reduces external active components and makes schematic review straightforward. Keep the regulator close to the protected load, provide input and output capacitors, and ensure the board has enough copper area to dissipate the calculated linear-regulator heat.
推薦
Precision measurement front ends
Measurement front ends often benefit from a quiet, locally regulated analog rail close to the sensing circuitry. The LM317LD13TR can create an adjustable rail for amplifiers, reference networks, and analog-to-digital input stages, while its low-current profile suits compact instruments. Because the regulator is linear, evaluate heat rise at the highest input voltage and load, and use low-noise resistors and capacitors where measurement precision depends on supply behavior.
推薦
Small industrial control boards
For small industrial control boards, the LM317LD13TR can provide a simple auxiliary rail for sensors, interface ICs, or relay-control sections when the current remains within the verified device rating. Its wide adjustable output range helps accommodate legacy 24 V and lower-voltage control architectures. Validate industrial temperature requirements, input transients, and isolation requirements separately; the regulator itself does not provide galvanic isolation.
推薦
推薦產品摘要
工程參考資料，適用於 LM317LD13TR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | LM217LD | LM317LD13TR | LM317LBDR2G | LM317KCSE3 | LM2904BIDR |
|---|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | onsemi | STMicroelectronics | STMicroelectronics |
| Package | 8-SOIC / SO-8 | SO-8 | 8-SOIC | SOIC-8 | SOIC-8 | SOIC-8 |
主要差異化特點
- Documented low-current operating point (對比LM317LBDR2G)
- Adjustable output with wide range (對比LM217LD)
- SO-8 packaging for compact boards (對比LM2904BIDR)
設計說明
Estimated: linear-regulator dissipation is approximately P = (VIN - VOUT) × IOUT. For example, at 40 V input, 12 V output, and 100 mA, estimated dissipation is 2.8 W before considering margin. Check the SOIC thermal resistance and use sufficient copper area; derate the design if the calculated junction temperature exceeds the device rating.
Place the input capacitor close to the input pin and the output capacitor close to the output pin. Keep the adjustment resistor divider compact and away from high-current return paths. Confirm capacitor voltage ratings and polarity against the maximum input voltage, and follow the manufacturer layout guidance for the exact LM317LD13TR package.
Do not assume that the generic LM317 current rating applies to LM317LD13TR. The verified distributor description specifies a 100 mA configuration, so higher-load designs require a different regulator or thermal solution. Also verify that any replacement uses the same pinout; an SO-8 package alone does not guarantee pin compatibility.
合規資訊
The supplied manufacturer and distributor search results do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Verify these attributes with the manufacturer or an authorized distributor before regulated production use.
