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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

STMicroelectronics L7806CD2T

Name: L7806CD2T
Brand: STMicroelectronics
SKU: L7806CD2T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L7806CD2T

Manufacturer:: STMicroelectronics

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Datasheet:: L7806CD2T.pdf

Description:: IC REG LINEAR 6V 1.5A D2PAK

Quantity:: RFQ Add To RFQ list

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Inventory:1,755

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Product details

Overview

L7806CD2T from STMicroelectronics is a three-terminal positive linear voltage regulator delivering a fixed 6 V output with up to 1.5 A continuous current, thermal overload and short-circuit protection, and ±2 % output voltage tolerance at 25 °C - used for local on-card power regulation in industrial control modules, embedded sensor interfaces, and automotive body electronics.

For engineers reviewing the L7806CD2T datasheet, L7806CD2T pinout, L7806CD2T application, or L7806CD2T equivalent, this page provides verified electrical specs, package-validated pin functions, real-world use cases, and cross-manufacturer alternatives with documented functional differences.

Technical Context

The L7806CD2T implements a monolithic silicon voltage regulator with internal current limiting, safe-area protection, and thermal shutdown - enabling robust operation without external protection circuitry. It operates as a drop-in replacement for legacy 78xx regulators while maintaining compatibility with standard input/output capacitor values (CI = 0.33 µF, CO = 0.1 µF).

Designed for fixed-output applications, it requires no external components for basic regulation but supports adjustable configurations via external resistors and diodes. Its dropout voltage remains stable at 2 V under 1 A load and 25 °C junction temperature, ensuring predictable performance across its specified input range (8–19 V for 6 V output).

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	6 V ±2 % at 25 °C; maintains regulation over IO = 5 mA–1.5 A and VI = 8–19 V
Maximum Output Current	1.5 A continuous - limited by internal current sense and thermal design
Dropout Voltage	2 V at IO = 1 A and TJ = 25 °C - defines minimum required input headroom
Supply Voltage Rejection	59 dB at 120 Hz, VI = 9–19 V, IO = 500 mA - suppresses ripple from unregulated DC sources
Output Noise	45 µV/VO (10 Hz–100 kHz) - suitable for analog-sensitive circuits like ADC references
Thermal Resistance	R_thJA = 100 °C/W (DPAK), R_thJC = 8 °C/W - determines heatsink requirements for sustained 1 A loads
Operating Junction Temp	0 to 125 °C - validated for industrial ambient environments without derating

Pinout & Package

Package: DPAK (TO-252-3), surface-mount, thermally enhanced with exposed drain pad for PCB heat dissipation.

Pin/Terminal	Circuit Role	Design Meaning
1 (Input)	V_IN	Unregulated DC input; must exceed VO + V_dropout (≥8 V typical) and remain ≤35 V absolute max
2 (Ground)	GND	Common reference for input and output; low-impedance return path critical for stability
3 (Output)	V_OUT	Regulated 6 V supply; requires 0.1 µF ceramic capacitor placed <2 mm from pin for high-frequency decoupling

Key Features

Feature	Design Value
Internal Short-Circuit Protection	Limits peak fault current to 2.2 A and holds output at safe level during sustained overload
Thermal Shutdown Activation	Triggers at ~165 °C junction temperature, auto-recovering after cooldown - prevents permanent damage
Safe Operating Area (SOA) Protection	Prevents secondary breakdown during transient overloads by dynamically limiting power dissipation
Low Quiescent Current	8 mA typical at 25 °C - minimizes standby power loss in always-on systems
Line & Load Regulation	≤120 mV line change (VI = 8–25 V); ≤120 mV load change (IO = 5 mA–1.5 A) - ensures stable rail under dynamic conditions

Applications

Industrial PLC I/O Module

Automotive Body Control Unit

Use Scenario: Powering isolated digital I/O drivers and analog sensor signal conditioning circuits within DIN-rail mounted programmable logic controllers.

IC Role / Device Role / Timing Role: Local 6 V rail generator providing clean, protected supply independent of main 24 V bus fluctuations.

Use Value: Eliminates need for external current limiting or thermal monitoring; enables compact board layout with single-layer heatsinking.

Use Scenario: Supplying microcontroller peripherals (CAN transceivers, LIN drivers, EEPROM) in door module ECUs.

IC Role / Device Role / Timing Role: Primary 6 V regulator feeding safety-critical subcircuits requiring guaranteed voltage during cold-crank (6.5 V min battery).

Use Value: Maintains regulation down to 8 V input - compatible with automotive battery transients per ISO 7637-2 Pulse 4.

Medical Patient Monitor Front-End

POS Terminal Power Management

Use Scenario: Biasing precision op-amps and ADC front-ends in portable diagnostic devices with strict EMI and noise requirements.

IC Role / Device Role / Timing Role: Low-noise 6 V source referenced to system ground, decoupled with 0.1 µF CO and 0.33 µF CI.

Use Value: 45 µV/VO broadband noise meets Class II medical device conducted emission limits without added filtering.

Use Scenario: Generating auxiliary 6 V rail for display backlight drivers and secure element ICs in retail point-of-sale terminals.

IC Role / Device Role / Timing Role: Secondary regulated supply derived from 12 V wall adapter, supporting hot-swap insertion events.

Use Value: Internal SOA and thermal protection prevent latch-up during repeated 12 V surge events during peripheral docking.

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
LM7806CDT/NOPB (Texas Instruments)	Same 6 V output, TO-252 package, but higher quiescent current (6.5 mA typ vs. 8 mA) and lower SVR (57 dB vs. 59 dB)	Marginally better thermal resistance (R_thJA = 90 °C/W), yet identical dropout and protection features	Preferred where lower idle current is critical; verify layout compatibility with TI's recommended CO placement.
MC7806CD2TR4G (onsemi)	Identical DPAK footprint and pinout; tighter initial tolerance (±2 % same), but higher max load regulation error (150 mV vs. 120 mV)	Specified for -40 to 125 °C extended temp range (AB grade), whereas L7806CD2T is C-grade (0–125 °C)	Choose for automotive under-hood use; confirm qualification to AEC-Q100 Grade 2 if required.

Compared with LM7806CDT/NOPB and MC7806CD2TR4G, the L7806CD2T offers superior supply rejection and lower load regulation drift - making it optimal for noise-sensitive industrial analog subsystems where input ripple and load step response are critical.

Availability

L7806CD2T is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control units, medical diagnostics equipment, and POS terminal designs requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for L7806CD2T 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 belongs to ST's legacy positive voltage regulator product line, engineered for ruggedness and ease-of-use in cost-sensitive, high-reliability embedded power applications - emphasizing intrinsic protection and broad operating temperature compliance.

FAQ

What is the minimum input voltage required for stable 6 V output?

The L7806CD2T requires a minimum input voltage of 8 V to maintain regulation at full 1.5 A load, based on its 2 V dropout specification. At lighter loads (<100 mA), regulation holds down to ~7.5 V, but design margin should retain ≥8.6 V input per datasheet test conditions (Table 11, VI = 8–19 V).

Can L7806CD2T be used without input or output capacitors?

No - the datasheet mandates a 0.33 µF input capacitor (CI) and 0.1 µF output capacitor (CO) for stability. Omitting CI risks oscillation under fast input transients; omitting CO degrades load regulation and increases output noise beyond 45 µV/VO. Ceramic X7R types are recommended for both.

How does thermal performance differ between DPAK and TO-220 packages?

In DPAK (L7806CD2T), R_thJA = 100 °C/W versus 50 °C/W for TO-220 - meaning the DPAK requires ~2× more PCB copper area or an external heatsink to sustain 1 A continuously at 70 °C ambient. However, DPAK's lower R_thJC (8 °C/W vs. 5 °C/W) allows more efficient heat transfer to internal layers when using thermal vias.

Is L7806CD2T RoHS compliant and halogen-free?

Yes - STMicroelectronics certifies L7806CD2T as RoHS 2011/65/EU compliant and halogen-free per their official product change notification PCN17-0022, with lead-free matte tin terminations and green molding compound meeting IEC 61249-2-21 standards.

L7806CD2T 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):: 8 mA

Current - Supply (Max):: -

PSRR:: 59dB (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

L7806CD2T FAQ

1.How can I place an order for L7806CD2T through Aetrix?

Please submit a Request for Quotation (RFQ) for L7806CD2T 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 L7806CD2T reliable?

The price and inventory of L7806CD2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L7806CD2T is usually 5 days.

3.What payment methods are accepted for L7806CD2T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L7806CD2T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L7806CD2T?

L7806CD2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L7806CD2T 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 L7806CD2T?

For technical support, including L7806CD2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L7806CD2T requirements.

6.How does Aetrix verify that L7806CD2T is sourced from the original manufacturer or authorized distributors?

All L7806CD2T 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 L7806CD2T meets industry standards.

7.What is the process for return or replacement of L7806CD2T?

All L7806CD2T units undergo pre-shipment inspection (PSI). If there is an issue with L7806CD2T, 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 L7806CD2T part is unused and in its original packaging.

Return procedure for L7806CD2T:

1.Submit a request within 90 days.

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

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