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STMicroelectronics L165V
- Part No.:
- L165V
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- Pentawatt-5 (Vertical, Bent and Staggered Leads)
- Datasheet:
-
L165V.pdf
- Description:
- IC POWER 1 CIRCUIT 5PENTAWATT
- Quantity:
- Payment:
- Shipping:
Inventory:4,878
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Product details
Overview
L165V from STMicroelectronics is a 3A monolithic power operational amplifier in Pentawatt® package, designed for high-current servo amplifiers, motor control, and regulated power supply output stages. It delivers ±24 Vpp output swing at 3A load, features SOA and thermal shutdown protection, and operates with ±18 V supply rails.
For engineers reviewing the L165V datasheet, L165V pinout, L165V application, or L165V equivalent, key selection criteria include output current capability (3.5 A peak), slew rate (8 V/µs at Gv=10), input offset voltage (±10 mV max), thermal shutdown threshold (110 °C at 12 W), and safe operating area compliance per Figure 7.
Technical Context
The L165V integrates complementary NPN/PNP power transistors in a protected SOA architecture with internal current limiting and thermal foldback. Its open-loop gain exceeds 80 dB and common-mode rejection reaches 70 dB with Rg ≤ 10 kΩ, enabling stable closed-loop operation in high-gain configurations up to Gv = 10.
It supports unity-gain and gain > 10 configurations (Figures 1–2), delivers 24 Vpp into 4 Ω at 1 kHz with 1.6 A output, and maintains 70% efficiency at 5 W output. Input bias current is as low as 0.2 µA, and noise performance is specified at 2 µV (10–10,000 Hz) and 100 pA (1 kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3.5 A peak (internally limited); enables direct drive of DC motors up to ~100 W into 4 Ω loads |
| Slew Rate | 8 V/µs at Gv = 10; supports bandwidth up to ~100 kHz in medium-gain servo loops |
| Input Offset Voltage | ±10 mV max; limits DC error in precision tracking regulators and current-sense amplifiers |
| Supply Voltage | ±18 V max; compatible with standard dual-rail industrial power supplies |
| Thermal Shutdown | 110 °C at Ptot = 12 W; prevents latch-up during transient overloads in motor H-bridge drivers |
| SOA Protection | Defined per Figure 7; ensures safe operation under simultaneous high VCE and high IC conditions |
| CMRR | 70 dB with Rg ≤ 10 kΩ; rejects common-mode noise in differential sensor interfaces |
Pinout & Package
Pentawatt® V package (orderable variant L165V): 5-pin single-in-line (SIP) thermally enhanced plastic package with integrated heatsink tab (pin 3). Dimensions per STMicroelectronics mechanical drawing 0015981 (L = 17.7 mm, H3 = 10.2 mm, tab width = 6.7 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input | High-impedance node (100–500 kΩ) for feedback network connection in closed-loop configurations |
| 2 | Non-Inverting Input | DC-coupled input accepting ±15 V differential range; referenced to ground or virtual ground |
| 3 | Power Ground / Heatsink Tab | Electrically connected to case; must be soldered to PCB copper pour for thermal management |
| 4 | Negative Supply (−VS) | Accepts −18 V max; powers lower output transistor and internal bias circuitry |
| 5 | Positive Supply (+VS) | Accepts +18 V max; powers upper output transistor and input stage |
Key Features
| Feature | Design Value |
|---|---|
| Internally Limited Peak Output Current | 3.5 A - eliminates need for external current-sense resistors in motor driver stages |
| Thermal Shutdown with Hysteresis | 110 °C activation / ~130 °C reset - prevents thermal runaway during intermittent overload |
| Safe Operating Area Protection | Defined per Figure 7 - guarantees no second breakdown when driving inductive loads like solenoids or relay coils |
| High Common-Mode Range | ±15 V differential input + full rail-to-rail common-mode (VS) - supports direct interface to ±15 V DAC outputs |
| Low Input Bias Current | 0.2 µA typical - minimizes offset drift in high-impedance feedback networks (e.g., >100 kΩ) |
Applications
| Bidirectional DC Motor Control | High-Current Tracking Regulator |
|---|---|
Use Scenario: TTL/CMOS-compatible bidirectional motor driver (Figure 9) controlling 24 V, 2 A brushed DC motors in robotics actuators. IC Role / Device Role / Timing Role: Power op-amp configured as current-controlled H-bridge driver with logic-level inputs. Use Value: Delivers 3.5 A peak current without external transistors; SOA protection prevents failure during stall conditions. | Use Scenario: Precision linear regulator delivering 0–24 V, 3 A output tracking a reference voltage in lab power supplies (Figure 11). IC Role / Device Role / Timing Role: High-gain error amplifier driving pass transistor base/emitter with fast transient response. Use Value: 8 V/µs slew rate enables <10 µs recovery from 1 A load steps; ±10 mV offset ensures <0.04% voltage error at 24 V. |
| Split-Supply Power Amplifier | Power Squarewave Oscillator |
Use Scenario: Audio-frequency power amplifier for 4 Ω speaker loads in industrial annunciator systems (Figure 13). IC Role / Device Role / Timing Role: Class-AB output stage with split ±18 V rails, configured in unity-gain follower mode. Use Value: 24 Vpp output at 3 A supports 36 W into 4 Ω; 70 dB CMRR suppresses ripple from shared AC/DC converter. | Use Scenario: Adjustable-frequency, variable-duty-cycle squarewave generator for PWM fan control (Figure 14). IC Role / Device Role / Timing Role: Self-oscillating comparator with independent RC timing and duty-cycle control via diode steering. Use Value: Frequency adjustable from 25 Hz to 700 Hz using 10 nF capacitor and 100 kΩ pot; duty cycle independently tunable without frequency coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM12CL | Higher output current (13 A), wider supply (±40 V), but larger TO-126 package and no integrated SOA protection | Requires external current limiting and thermal monitoring circuits; suited for higher-power (>50 W) amplifiers | Select when >5 A continuous output or >30 V rails are required; not drop-in due to pinout and protection differences |
| TCA0372 | Lower output current (1.5 A), no thermal shutdown, SOA defined only in datasheet curves (not internally enforced) | Needs external foldback circuitry for motor stall protection; used in cost-sensitive 12 V systems | Select for lower-cost 1 A applications where thermal margin is managed externally; incompatible with L165V's safety-critical use cases |
Compared with LM12CL and TCA0372, the L165V uniquely combines 3.5 A peak current, internal SOA enforcement, and thermal shutdown in a compact Pentawatt® package-making it optimal for space-constrained, safety-aware 24 V motor and regulator designs where reliability under transient overload is mandatory.
Availability
L165V is available at Aetrix Electronics and suitable for bidirectional motor control, high-current tracking regulators, split-supply audio amplifiers, and programmable squarewave oscillators requiring stable component supply across industrial OEM production cycles.
Supply support for L165V 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 industrial, automotive, and consumer markets.
The L165V belongs to ST's legacy power op-amp product line, engineered specifically for robust, high-current linear amplification in servo, motor, and precision power supply applications where internal protection and thermal resilience are critical.
FAQ
What is the maximum safe continuous output current for L165V?
The L165V delivers 3 A continuous output current under proper heatsinking (Rth-j-case ≤ 3 °C/W) and ambient temperature ≤ 50 °C. Its 3.5 A peak rating is internally limited but not sustainable continuously; sustained operation above 2.5 A requires active cooling or derating per Figure 8's power vs. ambient curve.
Can L165V be used in single-supply configurations?
No-the L165V requires dual symmetric supplies (±VS) and is not specified for single-supply operation. Its input common-mode range extends to the rails, but internal biasing and output stage symmetry depend on balanced ±18 V. Single-supply alternatives like LM675 require different compensation and layout.
Does L165V require external compensation capacitors?
Yes-compensation is application-dependent. Figures 3–5 show open/closed-loop frequency response; unity-gain stability requires a 10–22 pF capacitor from pin 1 to pin 5 per ST application note AN118. Gain > 10 configurations may omit it, but phase margin must be verified with load capacitance.
Is L165V still in active production?
No-STMicroelectronics has marked L165V as Obsolete Product(s) (per pages 1, 2, 4, 5, 9 of datasheet). Aetrix Electronics holds remaining new-old-stock inventory with full traceability and offers engineering support for legacy design continuity and last-time-buy planning.
L165V Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- Pentawatt-5 (Vertical, Bent and Staggered Leads)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Power
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 8V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- -
- Current - Input Bias:
- 200 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 40mA
- Current - Output / Channel:
- 3.5 A
- Voltage - Supply Span (Min):
- 12 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 5-PENTAWATT
L165V FAQ
1.How can I place an order for L165V through Aetrix?
Please submit a Request for Quotation (RFQ) for L165V 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 L165V reliable?
The price and inventory of L165V are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L165V is usually 5 days.
3.What payment methods are accepted for L165V?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L165V transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L165V?
L165V orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L165V 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 L165V?
For technical support, including L165V datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L165V requirements.
6.How does Aetrix verify that L165V is sourced from the original manufacturer or authorized distributors?
All L165V 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 L165V meets industry standards.
7.What is the process for return or replacement of L165V?
All L165V units undergo pre-shipment inspection (PSI). If there is an issue with L165V, 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 L165V part is unused and in its original packaging.
Return procedure for L165V:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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