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

STMicroelectronics L7808ACV-DG

Name: L7808ACV-DG
Brand: STMicroelectronics
SKU: L7808ACV-DG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L7808ACV-DG

Manufacturer:: STMicroelectronics

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

Package:: TO-220-3

Datasheet:: L7808ACV-DG.pdf

Description:: IC REG LINEAR 8V 1.5A TO220

Quantity:: RFQ Add To RFQ list

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Product details

Overview

L7808ACV-DG from STMicroelectronics is a three-terminal positive fixed-voltage linear regulator delivering 8 V at up to 1.5 A output current, featuring thermal overload protection, short-circuit protection, and SOA protection. It operates across 0 to 125 °C junction temperature range with ±2 % output voltage tolerance (A version), and is commonly used for local on-card regulation in industrial power supplies and embedded control modules.

For engineers reviewing the L7808ACV-DG datasheet, L7808ACV-DG pinout, L7808ACV-DG application, or L7808ACV-DG equivalent, key selection considerations include dropout voltage (2 V @ 1 A), load regulation (≤100 mV over 5 mA–1.5 A), supply voltage rejection (62 dB @ 120 Hz), quiescent current (4.3–6 mA), and thermal resistance (R_thJC = 5 °C/W in TO-220FP package).

Technical Context

This IC implements a monolithic series pass transistor architecture with internal current limiting, thermal shutdown, and safe operating area (SOA) protection-enabling robust operation without external protection circuitry. Its fixed 8 V output is trimmed during manufacturing to ±2 % accuracy at 25 °C and maintains stability under varying line (VI = 10.6–25 V) and load (IO = 5 mA–1.5 A) conditions.

The device requires minimum 5 mA load current for regulation and uses standard input (CI = 0.33 µF) and output (CO = 0.1 µF) capacitors. Dropout voltage remains constant at 2 V across temperature and load, and output noise is specified at 10 µV/√Hz (10 Hz–100 kHz bandwidth) for low-noise analog subsystems.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	8 V ±2 % at 25 °C; stable over IO = 5 mA–1.5 A and TJ = 0–125 °C
Max Output Current	1.5 A continuous; internally limited with thermal foldback
Dropout Voltage	2 V @ IO = 1 A, TJ = 25 °C - defines minimum VI ≥ 10 V for regulation
Supply Voltage Rejection	62 dB @ 120 Hz, VI = 11.5–21.5 V - suppresses ripple from unregulated DC sources
Load Regulation	≤100 mV over 5 mA–1.5 A - ensures stable rail under dynamic load steps
Thermal Resistance	R_thJC = 5 °C/W (TO-220FP) - enables >1 A delivery with moderate heatsinking
Quiescent Current	4.3–6 mA - low bias draw supports energy-sensitive applications

Pinout & Package

Package: TO-220FP (3-pin, vertical mounting, isolated tab). Pin assignments are standardized across L78xx regulators: Pin 1 = Input, Pin 2 = Ground, Pin 3 = Output.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Input)	Unregulated DC input connection	Accepts 10.6–25 V DC; must be decoupled with ≥0.33 µF ceramic capacitor close to pin
Pin 2 (Ground)	Reference node for regulation and protection circuits	Low-impedance return path; connects to system ground plane; critical for stability and noise immunity
Pin 3 (Output)	Regulated 8 V DC output	Delivers up to 1.5 A; requires ≥0.1 µF ceramic output capacitor; feeds downstream logic/analog rails

Key Features

Feature	Design Value
Fixed 8 V output with ±2 % tolerance	Eliminates external feedback network; reduces BOM count and layout complexity
Integrated thermal shutdown	Automatically disables output above safe junction temperature (TJ > ~165 °C), preventing permanent damage
Short-circuit current limiting	Clamps output to ~0.2 A during hard fault, enabling safe recovery without fuse replacement
SOA (Safe Operating Area) protection	Prevents second breakdown of pass transistor during transient overloads or capacitive loads
Extended temperature operation (0–125 °C)	Validated for industrial ambient environments without derating up to full 1.5 A load

Applications

Industrial PLC Power Rails

Automotive Body Control Modules

Use Scenario: Local 8 V supply for microcontroller I/O buffers and sensor interface circuitry in programmable logic controllers.

IC Role / Device Role / Timing Role: Primary local regulator converting 24 V bus to stable 8 V rail for mixed-signal peripherals.

Use Value: Internal thermal and short-circuit protection eliminates need for external fusing or thermal sensors, reducing board space and qualification effort.

Use Scenario: Powering LIN transceivers and window lift motor drivers in vehicle door modules.

IC Role / Device Role / Timing Role: Fixed-voltage post-regulator after buck converter, ensuring clean 8 V for communication and actuation ICs.

Use Value: 62 dB ripple rejection suppresses switching noise from upstream DC/DC, preserving signal integrity on LIN bus.

Medical Diagnostic Instrumentation

Point-of-Sale Terminal Logic Supply

Use Scenario: Providing regulated 8 V to precision ADC reference buffers and op-amp signal chains in portable ultrasound front-ends.

IC Role / Device Role / Timing Role: Low-noise analog supply generator with 10 µV/√Hz output noise and <100 mV load regulation.

Use Value: Stable output voltage drift (−0.8 mV/°C) minimizes calibration drift across operating temperature range.

Use Scenario: On-board 8 V rail for EMV-compliant smart card readers and display backlight drivers in retail terminals.

IC Role / Device Role / Timing Role: Cost-optimized, high-reliability linear regulator replacing discrete solutions in space-constrained designs.

Use Value: TO-220FP package offers isolated tab for direct heatsink mounting while maintaining creepage/clearance compliance.

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
LM7808CD2TR	±2 % VO tolerance, but higher quiescent current (6–8 mA), lower SVR (55 dB), R_thJC = 4.5 °C/W (D2PAK)	Less suitable for low-noise analog rails due to higher output noise (40 µV/√Hz) and reduced ripple rejection	Preferred where thermal performance is prioritized over noise; requires larger input capacitor (≥0.33 µF tantalum)
MC7808BD2TR4G	±4 % VO tolerance (B grade), wider VI range (up to 35 V), R_thJC = 5.5 °C/W (D2PAK), no guaranteed extended temp range	Not qualified for 0–125 °C operation; unsuitable for industrial control without derating	Lower-cost option for commercial-temp consumer applications with looser voltage accuracy requirements

Compared with LM7808CD2TR and MC7808BD2TR4G, L7808ACV-DG provides tighter initial accuracy (±2 %), superior ripple rejection (62 dB), and guaranteed operation across 0–125 °C - making it optimal for industrial and automotive applications demanding long-term stability and fault resilience.

Availability

L7808ACV-DG is available at Aetrix Electronics and suitable for industrial PLC power rails, automotive body control modules, medical diagnostic instrumentation, and point-of-sale terminal logic supplies requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for L7808ACV-DG 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, Switzerland, designing and manufacturing analog, MCU, power, and sensing solutions for industrial, automotive, and consumer markets.

L7808ACV-DG belongs to the L78 positive voltage regulator IC family, engineered for cost-effective, robust local regulation in harsh environments - emphasizing integrated protection, wide temperature operation, and compatibility with standard PCB assembly processes.

FAQ

What is the minimum input voltage required for L7808ACV-DG to maintain regulation?

The minimum input voltage is determined by dropout: VI(min) = VO + Vd = 8 V + 2 V = 10 V. Per datasheet Table 5, regulation is guaranteed for VI ≥ 10.6 V across full load (5 mA–1 A) and temperature (0–125 °C), with margin for line transients and PCB trace drop.

Can L7808ACV-DG be used without an input capacitor?

No - a minimum 0.33 µF ceramic capacitor is required between Pin 1 (Input) and Pin 2 (Ground), placed as close as possible to the device. Omitting it risks instability, oscillation, or failure to reject input ripple, especially with long input traces or high-impedance sources.

Is the tab of the TO-220FP package electrically connected?

Yes - the metal tab is internally connected to Pin 2 (Ground). This provides both thermal conduction to heatsinks and electrical grounding. When mounting to a heatsink, use an insulating washer and shoulder washer if the heatsink is not grounded, to prevent shorting Pin 2 to chassis.

How does L7808ACV-DG behave during short-circuit events?

It limits output current to ~0.2 A (Isc) continuously and triggers thermal shutdown if junction temperature exceeds ~165 °C. Short-circuit peak current reaches 2.2 A briefly before limiting engages. Recovery is automatic once fault clears and temperature drops below shutdown threshold.

L7808ACV-DG Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Active

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 35V

Voltage - Output (Min/Fixed):: 8V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 2V @ 1A (Typ)

Current - Output:: 1.5A

Current - Quiescent (Iq):: 6 mA

Current - Supply (Max):: -

PSRR:: 62dB (120Hz)

Control Features:: -

Protection Features:: Over Temperature, Short Circuit

Operating Temperature:: 0°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

L7808ACV-DG FAQ

1.How can I place an order for L7808ACV-DG through Aetrix?

Please submit a Request for Quotation (RFQ) for L7808ACV-DG 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 L7808ACV-DG reliable?

The price and inventory of L7808ACV-DG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L7808ACV-DG is usually 5 days.

3.What payment methods are accepted for L7808ACV-DG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L7808ACV-DG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L7808ACV-DG?

L7808ACV-DG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L7808ACV-DG 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 L7808ACV-DG?

For technical support, including L7808ACV-DG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L7808ACV-DG requirements.

6.How does Aetrix verify that L7808ACV-DG is sourced from the original manufacturer or authorized distributors?

All L7808ACV-DG 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 L7808ACV-DG meets industry standards.

7.What is the process for return or replacement of L7808ACV-DG?

All L7808ACV-DG units undergo pre-shipment inspection (PSI). If there is an issue with L7808ACV-DG, 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 L7808ACV-DG part is unused and in its original packaging.

Return procedure for L7808ACV-DG:

1.Submit a request within 90 days.

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

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