L272M - 0.7A Dual Power Operational Amplifier | STMicroelectronics
MPN： L272M ✓ 啟用中L272M 概覽
The L272M belongs to the operational-amplifier and power-management IC hierarchy. An operational amplifier is a voltage-controlled amplifier with very high open-loop gain, while a power operational amplifier adds a high-current output stage to drive low-impedance loads. In this device, the internal power-output stage is the defining feature: the amplifier can source or sink substantially more current than a standard signal-level op amp, making it useful as a driver or buffer between a control voltage and a power load.
The verified product information identifies the L272M as a dual general-purpose amplifier in an 8-Mini-DIP package. The L272 family is also described as having high gain and high output-power capability, with the L272A offering tighter input bias current, input offset voltage, and input offset current specifications than the standard L272. The L272M is therefore a functional choice when the design requires a dual amplifier with high load-current capability rather than low-noise signal amplification.
Key engineering characteristics include a maximum output current of 0.7 A, a supply operating range stated in verified listings as 4 V to 28 V, and an approximately 350 kHz gain-bandwidth indication in one distributor datasheet summary. The L272M is suited to servo and power-supply control loops, audio power stages, compact-disc mechanisms, and legacy video equipment. Its output stage introduces substantial dissipation potential, so load current, supply voltage, ambient temperature, copper area, and thermal-path design must be evaluated together.
Typical implementation places the L272M in a feedback configuration so the control node drives the output stage into a defined voltage or current. The feedback network must be stable with the intended load, and the output current capability should not be confused with continuous power dissipation. In servo systems, the amplifier can increase current delivered to a motor-control stage; in power supplies, it can drive a low-impedance feedback node or external power transistor. Audio applications benefit from the higher current drive, although the device is not positioned as a modern low-noise headphone amplifier.
The primary design consideration is thermal management. A power amplifier operating near 0.7 A can dissipate several watts depending on supply voltage, output voltage, and load impedance. PCB copper area, proximity to a thermal path, ambient temperature, and the selected package variant determine safe operating conditions. Designers should also verify the exact L272M pinout, output-current limits, supply limits, input common-mode range, and stability limits against the current STMicroelectronics datasheet before production release.
This product page combines the verified distributor and manufacturer descriptions with application guidance, packaging information, and a cross-reference comparison. It distinguishes the L272M from lower-current operational amplifiers such as LM324 and from tighter-offset L272A variants, while avoiding unsupported pricing, electrical-limit, and lifecycle assumptions that are not present in the supplied source data.
直接替換替代品，適用於 L272M — 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。
L272AM
✅ 直接替換聯絡詢價
查看資料表 →L272A
✅ 直接替換📋 參考替代品（不在目錄中）
L272
✅ 直接替換📋 參考替代品（不在目錄中）
L272M 最大額定值與電氣特性
| 無規格資料 |
L272M standard 腳位配置指南
L272M（standard 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： L272M.
請參閱 資料表 以查看完整腳位配置。
典型應用
L272M 適用於 6 應用s: Servo Motor Drive Buffers, Audio Power Buffer Stages, Power-Supply Control Loops, Compact-Disc and Legacy Audio Mechanisms, Industrial Actuator Interfaces, Legacy Video Signal Boosting.
Servo Motor Drive Buffers
The L272M fits servo-amplifier output stages because its dual power operational-amplifier configuration can deliver output current up to 0.7 A for driving low-impedance control loads. Placing each amplifier in an appropriate feedback topology allows the circuit to transfer a low-current position or velocity command into a higher-current drive signal. The dual section can serve two related servo channels when the design provides separate compensation and feedback networks. Because output-stage dissipation rises with supply voltage, output swing, and load current, the PCB should provide a substantial thermal path and the designer should verify current sharing, saturation behavior, and loop stability against the manufacturer datasheet.
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Audio Power Buffer Stages
The L272M is suitable for audio power-buffer applications where the source circuit cannot directly drive a low-impedance transducer or power-amplifier input. Its up-to-0.7-A output capability provides substantially more source and sink current than a conventional LM324-type amplifier, while the dual circuit can support two channels when the output topology is appropriate. The stage should use negative feedback to control gain and bandwidth, and the output must remain within the device's verified voltage swing and thermal limits. In audio systems, grounding, supply bypassing, and output-path layout are especially important because the high-current output stage can convert supply-impedance and ground-loop problems into audible noise or instability.
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Power-Supply Control Loops
The L272M can be used as a high-current buffer in power-supply feedback and drive arrangements because it is designed for low-impedance loads. A practical topology can place the power amplifier after a precision control amplifier, allowing the L272M to provide current to an output stage or load while the feedback network determines the regulated result. The device's listed 4-V-to-28-V supply range accommodates legacy industrial and laboratory supply architectures, but the actual rail limits must be checked in the datasheet. Thermal analysis is essential because power-stage loss grows with the voltage difference between the supply and output. Input filtering, supply bypassing, and loop compensation should be validated for the selected crossover frequency and load.
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Compact-Disc and Legacy Audio Mechanisms
The STMicroelectronics product description explicitly identifies compact-disc equipment as an intended L272 family application, making the L272M relevant to legacy optical-disc servo and drive circuits. Its high-current output capability can support low-impedance actuator or drive loads where a standard precision op amp would lack output drive. The dual amplifier arrangement can provide related control functions if the circuit requires matched channels, provided each section receives suitable feedback and compensation. Because legacy systems may use unusual supply rails and long analog wiring, input protection, bypassing, grounding, and stale-component inspection are important. The designer should verify the exact actuator drive waveform, current limit, and thermal condition before selecting the device for production.
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Industrial Actuator Interfaces
The L272M can serve as a high-current interface between a low-level industrial controller and a resistive or inductive actuator stage. The verified family description names servo amplifiers as a target application, and the L272M's 0.7-A output-current capability makes it more appropriate for low-impedance drive loads than a standard LM324. Feedback can be arranged around the amplifier or around an external power stage, depending on the required current and voltage. The design must account for inductive stored energy, output protection, current limiting, and safe shutdown because an actuator can present a substantially harsher load than a small-signal test circuit. Thermal verification under the worst-case continuous duty cycle is essential.
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Legacy Video Signal Boosting
The L272 family description identifies VCR applications, which supports use of the L272M in legacy video drive and buffering circuits. Its power-output stage can drive low-impedance video-related loads or interface sections more effectively than a standard signal-level dual amplifier. In such designs, feedback should preserve the required gain and bandwidth while avoiding output-stage oscillation into long cables or capacitive inputs. Practical implementation requires careful grounding, short output paths, suitable supply bypassing, and protection from transients entering through external connectors. The approximately 350-kHz gain-bandwidth indication should be compared with the video bandwidth and load phase margin. Production use should also account for the age of the target system and the availability of qualified replacement components.
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工程參考資料，適用於 L272M — 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 | L272AM | L272A | L272 |
|---|---|---|---|---|
| Package | 8-Mini-DIP (MDIP-8) | 8-Mini-DIP (MDIP-8) | 8-Mini-DIP (MDIP-8) | 8-Mini-DIP (MDIP-8) |
| Brand | STMicroelectronics | STMicroelectronics | onsemi | onsemi |
| Amplifier Configuration | Dual | Dual | Dual | Dual |
| Output Current Capability | Up to 0.7 A | Up to 0.7 A | Up to 0.7 A | Up to 0.7 A |
| Primary Intended Applications | Servo amplifiers, power supplies, compact-disc equipment, and VCR applications | L272 family power-operational-amplifier applications | L272 family power-operational-amplifier applications | L272 family power-operational-amplifier applications |
主要差異化特點
- High-current output capability (對比LM324D)
- Standard-family output drive (對比L272AM)
- Dual high-power amplifier architecture (對比L272)
設計說明
Calculate output-stage dissipation using the actual supply voltage, output voltage, load current, and quiescent current rather than treating the 0.7-A rating as a continuous dissipation specification. The L272M is a high-current power operational amplifier, so provide a large uninterrupted PCB ground path and copper area around the package. Confirm the package thermal resistance, maximum junction temperature, and safe operating area from the manufacturer datasheet before defining the maximum continuous load.
Place the input, output, and ground connections so that the high-current output return does not share a narrow path with sensitive feedback or input traces. Use local supply bypassing close to the device and verify the capacitor voltage rating against the maximum supply voltage. If the output drives a reactive or inductive load, add appropriate protection and ensure that feedback remains stable during startup and load transitions.
Do not substitute the L272M with an LM324 merely because both are dual amplifiers. The verified cross-reference discussion distinguishes the L272M's substantially greater sourcing and sinking capability from the LM324. When considering an L272, L272A, or L272AM alternative, compare the complete pinout, supply limits, input common-mode range, output swing, thermal limits, and stability behavior before treating the substitution as drop-in.
Route high-current output and supply conductors with short, wide paths and keep the feedback loop compact around the amplifier. Long feedback traces increase susceptibility to oscillation and EMI coupling. For servo, audio, or video mechanisms, isolate external connectors and actuator wiring from low-level input nodes, and use a single-point or otherwise controlled grounding strategy to prevent output currents from modulating the reference or feedback voltage.
合規資訊
The supplied verified results identify the device as a legacy-style STMicroelectronics power operational amplifier but do not provide compliance declarations. AEC-Q100 is not applicable based on the available general-purpose product information.
