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STMicroelectronics L7806ACD2T
- Part No.:
- L7806ACD2T
- Manufacturer:
- STMicroelectronics
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
L7806ACD2T.pdf
- Description:
- IC REG LINEAR 6V 1.5A D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:3,668
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Product details
Overview
L7806ACD2T from STMicroelectronics is a three-terminal positive linear voltage regulator delivering a fixed 6 V output at up to 1.5 A, featuring thermal overload protection, short-circuit protection, and safe operating area (SOA) protection. It operates across 0 °C to 125 °C junction temperature and is commonly used in industrial power supplies, embedded control modules, and local on-card regulation for microcontroller subsystems.
For engineers reviewing the L7806ACD2T datasheet, L7806ACD2T pinout, L7806ACD2T application, or L7806ACD2T equivalent, key selection criteria include ±2 % output voltage tolerance at 25 °C, 2 V dropout voltage at 1 A, 65 dB supply voltage rejection at 120 Hz, 10 µV/√Hz output noise density, and D²PAK package thermal resistance of 3 °C/W junction-to-case.
Technical Context
This IC implements a monolithic series pass transistor with internal current limiting, thermal shutdown, and SOA protection - enabling robust operation without external protection circuitry. Its architecture relies on a bandgap reference and error amplifier to maintain regulation under varying load and line conditions.
Designed for fixed-output use, it supports external capacitor stabilization (0.33 µF input, 0.1 µF output recommended) and tolerates input voltages up to 35 V for 6 V output variants. Minimum load current is 5 mA; quiescent current remains stable at 4.3–6 mA across operating conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 6.0 V ±2 % (±120 mV) at 25 °C - ensures stable logic-level supply for 6 V systems |
| Max Output Current | 1.5 A continuous - sufficient for powering multiple peripherals or small motors |
| Dropout Voltage | 2 V at 1 A - requires minimum 8 V input for regulated 6 V output |
| Supply Rejection | 65 dB at 120 Hz - suppresses ripple from rectified AC or switching pre-regulators |
| Output Noise | 10 µV/√Hz (10 Hz–100 kHz) - low-noise performance suitable for analog sensor interfaces |
| Thermal Resistance | 3 °C/W (junction-to-case, D²PAK) - enables high-power operation with minimal heatsink mass |
| Operating Temp | 0 °C to 125 °C junction - qualified for industrial ambient environments |
Pinout & Package
The L7806ACD2T is housed in a surface-mount D²PAK (TO-263) package with three terminals: Input (IN), Ground (GND), and Output (OUT). This thermally enhanced package supports high-current operation with low junction-to-case thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Unregulated DC input | Accepts 8.6–19 V for full-load regulation; must be decoupled with ≥0.33 µF ceramic capacitor |
| GND | Reference and return path | Common node for input and output capacitors; critical for stability and noise immunity |
| OUT | Regulated 6 V output | Delivers up to 1.5 A; requires ≥0.1 µF ceramic capacitor for transient response and loop stability |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 6 V output | Eliminates need for external feedback resistors - simplifies BOM and layout |
| Internal thermal shutdown | Prevents damage during sustained overload or inadequate heatsinking |
| Short-circuit current limit | Clamps output to ~0.2 A during fault - protects downstream circuitry |
| SOA protection | Prevents transistor destruction during simultaneous high voltage and current stress |
| Extended temperature range | Rated for 0–125 °C junction - supports industrial and automotive under-hood applications |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Powering digital isolators, optocouplers, and level-shifters in modular I/O racks. IC Role / Device Role / Timing Role: Local 6 V rail generator providing clean, isolated supply independent of main system bus. Use Value: Eliminates distribution losses and noise coupling from centralized 24 V supply; thermal protection ensures reliability during field wiring faults. | Use Scenario: Supplying 6 V to window lift motor drivers and door lock actuators. IC Role / Device Role / Timing Role: Secondary regulator stepping down 12 V battery-derived rail to drive logic and gate drivers. Use Value: Withstands load dump transients up to 35 V input and sustains 1.5 A peak motor startup current without latch-up. |
| Medical Patient Monitor Front-End | Point-of-Sale Terminal Power Management |
Use Scenario: Biasing analog front-end amplifiers and ADC reference buffers. IC Role / Device Role / Timing Role: Low-noise 6 V source for precision signal conditioning stages. Use Value: 10 µV/√Hz noise density and 65 dB ripple rejection preserve SNR in ECG/SpO₂ acquisition paths. | Use Scenario: Powering EMV contact smart card readers and secure element ICs. IC Role / Device Role / Timing Role: Dedicated 6 V supply meeting ISO 7816-3 voltage tolerance requirements. Use Value: ±2 % output tolerance at 25 °C and <±0.8 mV/°C drift ensure compliance across operating temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM7806CD2T | ±2 % tolerance, same 6 V output, but 0–125 °C rating and higher quiescent current (8 mA vs. 4.3–6 mA) | No SOA protection; lower SVR (59 dB vs. 65 dB); higher output noise (45 µV/VO vs. 10 µV/VO) | Preferred where legacy compatibility matters; avoid in noise-sensitive or thermally constrained designs |
| MC7806CD2TG | Same D²PAK package, ±2 % tolerance, but wider input range (up to 40 V) and higher thermal resistance (5 °C/W j-c) | Lower short-circuit current limit (0.25 A vs. 0.2 A), no guaranteed extended temp range beyond 125 °C | Suitable when higher input voltage margin is required; verify heatsink adequacy due to reduced thermal efficiency |
Compared with LM7806CD2T and MC7806CD2TG, the L7806ACD2T offers superior noise performance, tighter thermal regulation, and integrated SOA protection - making it optimal for industrial and medical applications demanding long-term reliability under variable load and temperature.
Availability
L7806ACD2T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, medical patient monitor front-ends, and point-of-sale terminal power management requiring stable component supply and long-lifecycle support.
Supply support for L7806ACD2T 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, specializing in power management, microcontrollers, and analog ICs for industrial, automotive, and consumer markets.
The L78 series is ST's flagship family of three-terminal positive linear regulators, engineered for ruggedness and simplicity in local on-card regulation - targeting cost-sensitive, high-reliability applications where external complexity must be minimized.
FAQ
What is the minimum input voltage required for stable 6 V output at 1.5 A?
The L7806ACD2T requires a minimum input voltage of 8.6 V under full-load conditions (IO = 1 A) per datasheet Table 4. At 1.5 A, derating applies due to thermal limits; with adequate heatsinking, 8.6 V remains viable, but 9–10 V is recommended to maintain regulation across temperature extremes and ensure margin against dropout.
Can this regulator be used without input/output capacitors?
No - the L7806ACD2T requires a minimum 0.33 µF ceramic capacitor at the input and 0.1 µF at the output for stability, as specified in DS0422. Omitting either risks oscillation, poor transient response, or failure to regulate under dynamic load changes, especially in D²PAK packages with higher parasitic inductance.
How does thermal shutdown behave during sustained overload?
When junction temperature exceeds ~165 °C, the L7806ACD2T disables the pass transistor and holds output at zero volts until temperature falls below ~145 °C (typical hysteresis). During this cycle, quiescent current drops to ~1 mA, allowing passive cooling. Recovery is automatic and does not require power cycling.
Is the L7806ACD2T RoHS-compliant and halogen-free?
Yes - the L7806ACD2T is manufactured in accordance with EU RoHS Directive 2011/65/EU and meets STMicroelectronics' "Ecopack2" standard, including halogen-free packaging (≤900 ppm bromine + chlorine) and lead-free terminations compliant with JEDEC J-STD-020 moisture sensitivity level 3.
L7806ACD2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 35V
- Voltage - Output (Min/Fixed):
- 6V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 2V @ 1A (Typ)
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- 6 mA
- Current - Supply (Max):
- -
- PSRR:
- 65dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK
L7806ACD2T FAQ
1.How can I place an order for L7806ACD2T through Aetrix?
Please submit a Request for Quotation (RFQ) for L7806ACD2T 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 L7806ACD2T reliable?
The price and inventory of L7806ACD2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L7806ACD2T is usually 5 days.
3.What payment methods are accepted for L7806ACD2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L7806ACD2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L7806ACD2T?
L7806ACD2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L7806ACD2T 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 L7806ACD2T?
For technical support, including L7806ACD2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L7806ACD2T requirements.
6.How does Aetrix verify that L7806ACD2T is sourced from the original manufacturer or authorized distributors?
All L7806ACD2T 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 L7806ACD2T meets industry standards.
7.What is the process for return or replacement of L7806ACD2T?
All L7806ACD2T units undergo pre-shipment inspection (PSI). If there is an issue with L7806ACD2T, 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 L7806ACD2T part is unused and in its original packaging.
Return procedure for L7806ACD2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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