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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

STMicroelectronics L272

Name: L272
Brand: STMicroelectronics
SKU: L272
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L272

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 16-PowerDIP (0.300", 7.62mm)

Datasheet:: L272.pdf

Description:: IC OPAMP GP 2 CIRCUIT 16POWERDIP

Quantity:: RFQ Add To RFQ list

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Inventory:4,710

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Product details

Overview

L272 from STMicroelectronics is a dual high-output-current power operational amplifier in SO16 narrow, PowerDIP-16, and MiniDIP-16 packages, delivering up to 1 A DC output current per channel, operating from single or split supplies (±4 V to ±14 V), with ground-compatible inputs and low saturation voltage-used in bidirectional DC motor control, CD servo amplifiers, and VCR capstan drivers.

For engineers reviewing the L272 datasheet, L272 pinout, L272 application, or L272 equivalent, key selection criteria include thermal shutdown threshold (145 °C), slew rate (1 V/µs), open-loop gain (≥60 dB at 100 Hz), common-mode rejection (≥60 dB at 1 kHz), and output swing (21 V into 0.1 A load at VS = 24 V).

Technical Context

The L272 integrates two independent high-power op-amp channels on a single monolithic die, each featuring internal thermal shutdown protection and rail-to-rail input stage compatibility with ground. Its architecture supports both single-supply (4–28 V) and split-supply (±4 V to ±14 V) operation without level-shifting circuitry.

It delivers 1 A continuous DC output current per channel with 1.5 A non-repetitive peak capability, enabled by optimized thermal resistance (R_{th j-case} = 15 °C/W for PowerDIP, 70 °C/W for SO16), and maintains stable performance across –40 °C to +85 °C ambient temperature range.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	1 A DC per channel - enables direct drive of small motors, solenoids, and power transistors without external boost stages.
Slew Rate	1 V/µs - supports audio-frequency and medium-speed servo loop response without distortion.
Input Offset Voltage	15–60 mV - sets baseline DC error in precision gain stages; requires trimming in closed-loop systems demanding <10 mV offset.
Thermal Shutdown Threshold	145 °C junction - protects against latch-up during sustained overload or poor heatsinking.
Supply Voltage Range	±4 V to ±14 V (split) or 4–28 V (single) - allows flexible integration in legacy 12 V/24 V industrial and consumer power rails.
Common-Mode Rejection	60–75 dB at 1 kHz - ensures robustness against supply noise and ground bounce in motor-drive feedback paths.
Open-Loop Gain	60–70 dB at 100 Hz - provides sufficient loop gain for stable unity-gain stable configurations with moderate capacitive loads.

Pinout & Package

Available in SO16 narrow (L272D), PowerDIP-16 (L272), and MiniDIP-16 (L272M) packages. Pinout is identical across variants (top view): Pins 1–8 and 9–16 form two mirrored dual-op-amp sections with shared power pins (Pin 4 = V_CC, Pin 12 = V_EE).

Pin/Terminal	Circuit Role	Design Meaning
1, 16	Inverting Input (Ch1), Non-inverting Input (Ch2)	High-impedance differential inputs compatible with ground reference; support single-supply operation.
2, 15	Non-inverting Input (Ch1), Inverting Input (Ch2)	Matched input structure enables symmetrical dual-channel feedback design without external inversion.
3, 14	Output (Ch1), Output (Ch2)	Capable of sourcing/sinking 1 A continuously; requires external heatsink above ~300 mW dissipation.
4	Positive Supply (V_CC)	Shared positive rail for both amplifiers; decoupling capacitor (100 nF) required adjacent to pin for stability.
12	Negative Supply (V_EE)	Shared negative rail or ground in single-supply mode; must be low-impedance to avoid oscillation.
8, 9	NC / Thermal Pad (SO16)	No-connect in DIP packages; in SO16, Pin 8/9 are internally tied to substrate for thermal conduction to PCB copper.

Key Features

Feature	Design Value
Dual high-current output stage	1 A per channel enables direct interface with 12 V DC motors (e.g., CD tray actuator, VCR capstan) without discrete driver transistors.
Ground-compatible inputs	Allows zero-input-voltage operation in single-supply systems (e.g., 24 V battery-powered servo), eliminating need for bias networks.
Internal thermal shutdown	Automatic disable at 145 °C junction temperature prevents catastrophic failure during stall or short-circuit conditions.
Large common-mode and differential input range	Supports input signals spanning rail-to-rail (±Vs), critical for sensing across shunt resistors or motor back-EMF in H-bridge feedback.
Low saturation voltage	V_OL/V_OH ≤ 1.5 V at 1 A load - preserves headroom for output swing in 24 V systems, enabling >21 V usable swing.

Applications

CD Player Servo Amplifier

VCR Capstan Motor Control

Use Scenario: Precision positioning of optical pickup in compact disc players using analog position error signal (PES) feedback.

IC Role / Device Role / Timing Role: Dual op-amp configured as summing amplifier and integrator in velocity/position loop; one channel processes PES, the other drives coil current.

Use Value: 1 A output current directly drives voice-coil actuator; ground-compatible inputs simplify analog front-end design with no level-shifting.

Use Scenario: Constant linear tape velocity regulation via capstan motor torque control in analog video recorders.

IC Role / Device Role / Timing Role: Dual-channel current-mode amplifier: one channel regulates motor current based on tachometer feedback, the other compensates for tape tension variation.

Use Value: Low saturation voltage preserves dynamic range at 12 V supply; thermal shutdown prevents damage during tape jam events.

Bidirectional DC Motor Driver

Linear Power Supply Booster

Use Scenario: Microcontroller-driven H-bridge replacement for small robotics or lab equipment requiring reversible motion and current limiting.

IC Role / Device Role / Timing Role: Two L272 channels used as complementary push-pull drivers per motor terminal, accepting PWM or analog speed commands.

Use Value: 1.5 A peak current supports brief acceleration surges; input compatibility with µP logic levels (e.g., L291 DAC) eliminates level translators.

Use Scenario: High-current pass element amplifier in adjustable bench power supplies delivering up to 1 A at 0–24 V.

IC Role / Device Role / Timing Role: Error amplifier comparing output voltage to reference, driving external NPN/PNP pass transistors in series-regulator topology.

Use Value: High open-loop gain (≥60 dB) ensures tight regulation (<0.1% line/load); wide supply range simplifies auxiliary rail design.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual high-current op-amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TCA0372 (ON Semiconductor)	0.5 A output current, lower thermal shutdown threshold (125 °C), SO8 package only.	Not suitable for 1 A motor loads; limited to low-power servo or audio buffer roles.	Select when board space is constrained and output current ≤500 mA suffices.
LM12CL (Texas Instruments)	Single-channel, 1.4 A output, higher quiescent current (15 mA), TO-100 metal can package.	Requires two devices for dual-channel use; superior thermal performance but larger footprint.	Select for highest reliability in high-temp industrial environments where dual-channel integration is secondary.

Compared with TCA0372 and LM12CL, the L272 uniquely balances dual-channel integration, 1 A per channel capability, and SO16/PowerDIP packaging-making it optimal for space-constrained consumer servo systems where thermal margin and pin count are critical trade-offs.

Availability

L272 is available at Aetrix Electronics and suitable for CD player servo systems, VCR capstan controllers, bidirectional DC motor drivers, and linear power supply boosters requiring stable component supply across extended production lifecycles.

Supply support for L272 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, power, microcontroller, and sensor solutions for automotive, industrial, and consumer markets.

The L272 belongs to ST's legacy power op-amp product line, engineered specifically for cost-sensitive, high-reliability analog power interfaces in consumer audio/video equipment and electromechanical control systems.

FAQ

What is the maximum safe continuous output current per channel for L272?

The L272 is rated for 1 A DC output current per channel under specified thermal conditions: Tamb ≤ 80 °C for PowerDIP, ≤ 50 °C for MiniDIP, and Tcase ≤ 90 °C for SO16. Exceeding these limits risks thermal shutdown activation or long-term reliability degradation. Derating curves in the datasheet must be applied for ambient temperatures above these thresholds.

Can L272 operate from a single 12 V supply with inputs referenced to ground?

Yes. The L272 features ground-compatible inputs and operates from single supplies as low as 4 V. With VS = 12 V, inputs may swing from ground to within ~2 V of VS, and outputs deliver up to ~10 V swing into 1 A load. A 100 nF bypass capacitor between Pins 4 and 12 is mandatory for stability in single-supply configurations.

Does L272 require external compensation for unity-gain stability?

No external compensation is required for unity-gain stable operation. The L272 is internally compensated for closed-loop gains ≥1. However, layout best practices-including short traces, ground plane beneath the IC, and local 100 nF ceramic decoupling on supply pins-are essential to prevent oscillation, especially when driving capacitive loads >100 pF.

How does thermal shutdown behave during transient overloads?

Thermal shutdown activates at ~145 °C junction temperature and disables both amplifier outputs until junction temperature falls below ~135 °C hysteresis threshold. During brief peak-current events (e.g., motor startup), the device may remain active if average power dissipation stays within R_th-limited boundaries; the 1.5 A non-repetitive peak rating assumes <10 ms duration and adequate heatsinking.

L272 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 16-PowerDIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Amplifier Type:: General Purpose

Number of Circuits:: 2

Output Type:: -

Slew Rate:: 1V/µs

Gain Bandwidth Product:: 350 kHz

-3db Bandwidth:: -

Current - Input Bias:: 300 nA

Voltage - Input Offset:: 15 mV

Current - Supply:: 8mA

Current - Output / Channel:: 1 A

Voltage - Supply Span (Min):: 4 V

Voltage - Supply Span (Max):: 28 V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 16-PowerDIP

L272 FAQ

1.How can I place an order for L272 through Aetrix?

Please submit a Request for Quotation (RFQ) for L272 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for L272 reliable?

The price and inventory of L272 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L272 is usually 5 days.

3.What payment methods are accepted for L272?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L272 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L272?

L272 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L272 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for L272?

For technical support, including L272 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L272 requirements.

6.How does Aetrix verify that L272 is sourced from the original manufacturer or authorized distributors?

All L272 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that L272 meets industry standards.

7.What is the process for return or replacement of L272?

All L272 units undergo pre-shipment inspection (PSI). If there is an issue with L272, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The L272 part is unused and in its original packaging.

Return procedure for L272:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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