L7805ABV - 5V 1.5A Linear Regulator | STMicroelectronics
料号： L7805ABV ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.1416 | $0.14 |
| 10 | $0.1416 | $1.42 |
| 100 | $0.1416 | $14.16 |
| 500 | $0.1416 | $70.80 |
| 1,000 | $0.1416 | $141.60 |
L7805ABV 概述
A linear voltage regulator converts an input voltage into a stable output by passing or regulating current rather than switching the supply through an inductor and switching node. The L7805ABV belongs to the linear regulator and voltage-regulator hierarchy, making it useful where a simple, low-noise 5 V rail is needed from a higher-voltage supply. Its fixed 5 V output simplifies designs that do not require an adjustable rail.
The key verified features include a 5.0 V nominal output, positive fixed regulation, a TO-220 package, and distributor-rated current capability shown as 1.5 A by DigiKey and 1.0 A by Mouser. The manufacturer datasheet search result also describes the family as suitable for output currents in excess of 1 A when adequate heat sinking is provided. Its internal current limiting, thermal overload protection, and safe operating-area protection improve robustness in local regulation circuits.
The device is suitable for industrial control boards, power-supply modules, embedded systems, instrumentation, and general-purpose 5 V regulation. Because a linear regulator dissipates the difference between input and output voltage as heat, input-to-output headroom and thermal management determine practical load capability. A TO-220 package also requires correct mechanical mounting and sufficient thermal path to the board or heatsink.
For a new design, check the minimum input voltage, dropout requirement, maximum input voltage, output-current budget, thermal limits, and required capacitor network against the current STMicroelectronics datasheet. Do not substitute a different package without confirming pinout, polarity, stability, and thermal requirements. The verified distributor data does not provide a complete current price ladder or lifecycle statement, so those values are not inferred here.
This page consolidates verified distributor identity and package information, manufacturer-family technical context, sourcing links, and design guidance intended to help engineers compare fixed 5 V linear regulators without treating package similarity as proof of drop-in compatibility.
直接替换替代料： L7805ABV ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： L7805ABV （相同外形与封装尺寸） ——差异在于 Output Voltage, RoHS Status, Mounting Type, Package, Dropout Voltage.
快速对比工具——选择替代料号进行并排对比：
L7805CV
✅ 直接替换✓ 有现货
$0.1464 / 个
查看数据手册 →L7805CV
✅ 直接替换✓ 有现货
$0.1464 / 个
查看数据手册 →L7805CV
✅ 直接替换✓ 有现货
$0.1464 / 个
查看数据手册 →L7805AB
✅ 直接替换📋 参考替代料（不在目录中）
MC7805ACTG
✅ 直接替换📋 参考替代料（不在目录中）
L7805ABV 最大额定值与电气特性
| Product Type | Fixed positive linear voltage regulator |
| 输出电压 | 5.0 V |
| 输出配置 | Single output |
| Output Polarity | Positive |
| DigiKey Rated Output Current | 1.5 A |
| Mouser Rated Output Current | 1.0 A |
| Manufacturer Family Current Capability | In excess of 1 A with adequate heat sinking |
| 封装 | TO-220 |
| Pins | 3 terminals |
| 安装类型 | Through-hole |
| Internal Current Limiting | Included |
| Thermal Overload Protection | Included |
| Safe Operating Area Protection | Included |
| Regulation Type | Linear |
| Dropout Class | Low-dropout regulator family |
| RoHS 状态 | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
L7805ABV to-220 引脚配置指南
L7805ABV（to-220 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： L7805ABV.
请参阅 数据手册 以查看完整引脚配置。
典型应用
L7805ABV 适用于 6 应用s: Embedded control-board 5 V rail, Industrial instrumentation power supply, Retrofit and hobby electronics power module, Audio and low-noise analog supply, Motor-control auxiliary supply, Industrial sensor-node regulator.
Embedded control-board 5 V rail
The L7805ABV fits embedded control boards that convert a higher DC rail into a fixed 5 V supply for processors, logic, sensors, and communication modules. Its fixed 5.0 V output removes the adjustment network required by an adjustable regulator, while the three-terminal TO-220 package supports through-hole assembly and straightforward inspection. The main design issue is heat: a linear regulator dissipates the difference between input and output voltage, so a 12 V-to-5 V conversion at substantial load requires copper area or a heatsink. Verify the regulator current rating, dropout behavior, startup stability, and thermal limits in the STMicroelectronics datasheet before finalizing the rail.
推荐
Industrial instrumentation power supply
The L7805ABV is appropriate for local regulation in industrial instrumentation where a clean, fixed 5 V rail is needed close to analog or digital circuitry. A three-terminal linear regulator can reduce the need for complex output sequencing, while the TO-220 package provides a conventional through-hole thermal and mechanical format. The trade-off is that linear regulation produces heat proportional to the voltage drop and current, unlike a switching regulator. Use the verified 5.0 V output and manufacturer protection features as the starting point, then confirm maximum input voltage, load transient behavior, ambient temperature, and thermal resistance in the official datasheet.
推荐
Retrofit and hobby electronics power module
The L7805ABV is well suited to retrofit boards, educational electronics, and hobby power modules because the TO-220 package and three-terminal architecture are easy to inspect and wire. It can provide a fixed 5 V output from a higher-voltage DC source without an external adjustment resistor, and the manufacturer family includes current limiting, thermal shutdown, and safe-area protection. Because the package is through-hole, designers must account for lead spacing, orientation, and adequate copper thermal paths. Verify the exact pinout and electrical limits from the STMicroelectronics datasheet; distributor listings alone do not establish every replacement or layout detail.
推荐
Audio and low-noise analog supply
The L7805ABV can serve as a local 5 V regulator for audio, sensor, and other noise-sensitive analog sections when the upstream supply is above the required dropout headroom. A linear regulator avoids the switching node of a buck converter, which can help simplify power filtering for sensitive analog circuits. However, the verified data does not provide a noise specification, ripple figure, or measured PSRR for this exact MPN, so it should not be selected solely for a noise-sensitive requirement without reviewing the official datasheet. Keep input and output decoupling close to the device and validate the final rail under the intended load.
推荐
Motor-control auxiliary supply
The L7805ABV can provide a fixed 5 V auxiliary rail for controller logic, gate-driver support circuits, sensors, and communication hardware in a motor-control system. Separating the low-voltage control rail from a higher-voltage power stage can simplify the controller's power architecture and keep the sensitive section behind a conventional linear regulator. The thermal requirement depends on the difference between the auxiliary input and 5 V output and on the control-load current. A 24 V auxiliary input, for example, would require substantially more heat management than a 9 V input at the same load. Confirm the exact input range and current capability before using it in a 24 V design.
推荐
Industrial sensor-node regulator
The L7805ABV is suitable for a local 5 V branch in an industrial sensor node when a higher-voltage bus must be reduced close to the sensing electronics. The fixed output is useful for analog front ends, digital converters, and communication modules that share a conventional 5 V supply. Because the device is a linear regulator, long cable drops and large input-to-output differences can increase heat and reduce available current margin. Use the distributor-identified 5.0 V output and TO-220 format, but verify maximum input voltage, thermal shutdown behavior, dropout, and environmental ratings from the manufacturer documentation. Add local decoupling and test the assembled node under worst-case load and temperature.
推荐
推荐产品汇总
工程参考数据： L7805ABV ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | L7805CV | L7805C | L7805 | MC7805ACTG |
|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | onsemi |
| Package | TO-220 | TO-220 | TO-220 | TO-220 | TO-220 |
| Output Voltage | 5.0 V | 5.0 V | 5.0 V | 5.0 V | 5.0 V |
| Output Polarity | Positive | Positive | Positive | Positive | Positive |
| Regulation | Linear | Linear | Linear | Linear | Linear |
| Drop-in Status | Target part | Potential; verify exact pinout and electrical limits | Potential; verify exact pinout and electrical limits | Potential; verify exact pinout and electrical limits | Potential; verify exact pinout and electrical limits |
关键差异点
- Fixed 5.0 V regulation （对比 L7805CV)
- Manufacturer-specific family support （对比 MC7805ACTG)
- TO-220 through-hole construction （对比 L7805C)
设计说明
Estimate regulator dissipation as P_D approximately equal to (V_IN - V_OUT) multiplied by I_OUT, then add the quiescent-current contribution. For example, a 12 V input, 5 V output, and 0.5 A load gives an estimated 3.5 W before quiescent-current effects. Validate that the TO-220 thermal path, copper area, ambient temperature, and optional heatsink keep the junction below the manufacturer limit.
Place the input and output capacitors close to the regulator terminals and follow the manufacturer datasheet for capacitor values, tolerances, and ESR requirements. Keep high-current copper paths short and wide, provide adequate clearance around the TO-220 body, and confirm the package hole pattern and lead orientation against the mechanical drawing. The verified snippets do not provide the exact capacitor recommendations.
Do not treat the L7805 suffix, package name, or similar function as proof of interchangeability. Confirm input pin, output pin, ground pin, maximum input voltage, dropout voltage, current limit, thermal shutdown, and output tolerance for every candidate. The distributor snippets conflict on current rating, so the replacement decision should use the official manufacturer datasheet rather than marketplace metadata.
合规信息
The supplied verified results do not provide extractable RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations for L7805ABV. The product is not described as an automotive-qualified device, so AEC-Q100 is recorded as not_applicable rather than qualified.
