Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

STMicroelectronics L7808CV-DG

Name: L7808CV-DG
Brand: STMicroelectronics
SKU: L7808CV-DG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: L7808CV-DG

Manufacturer:: STMicroelectronics

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

Package:: TO-220-3

Datasheet:: L7808CV-DG.pdf

Description:: IC REG LINEAR 8V 1.5A TO220

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:303

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

L7808CV-DG from STMicroelectronics is a three-terminal positive linear voltage regulator delivering a fixed 8 V output at up to 1.5 A, featuring thermal overload protection, short-circuit protection, and safe operating area (SOA) protection. It operates with input voltages up to 35 V (for VO = 5–18 V), maintains ±2 % output tolerance over temperature, and is housed in a TO-220FP package for industrial power rail regulation.

For engineers reviewing the L7808CV-DG datasheet, L7808CV-DG pinout, L7808CV-DG application, or L7808CV-DG equivalent, key selection criteria include dropout voltage (2 V @ 1 A), load regulation (≤160 mV), supply voltage rejection (56 dB @ 120 Hz), quiescent current (8 mA), and junction temperature range (0 to 125 °C).

Technical Context

This device implements a monolithic series pass transistor architecture with internal current limiting, thermal shutdown, and SOA protection-enabling robust local regulation without external compensation. Its fixed-output topology eliminates feedback network design but supports adjustable configurations via external resistors and diodes.

Operation requires minimum 5 mA load current for regulation stability and uses standard 0.33 µF input and 0.1 µF output ceramic capacitors per test circuits. Dropout behavior is characterized at 2 V under full 1 A load at 25 °C, with output voltage drift of −0.8 mV/°C.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 8 V, ±5 % tolerance over full load (5 mA–1.5 A) and temperature (0–125 °C)
Max Input Voltage	35 V DC (for VO = 5–18 V), enabling use with unregulated 24 V rails after rectification
Output Current	Up to 1.5 A continuous, limited by thermal resistance (R_thJA = 60 °C/W in TO-220FP)
Dropout Voltage	2 V @ 1 A, 25 °C - dictates minimum input headroom for stable regulation
Supply Rejection	56 dB @ 120 Hz - suppresses ripple from rectified AC supplies
Noise Voltage	52 µV/√Hz (10 Hz–100 kHz) - suitable for analog-sensitive subsystems like sensors or ADC references
Quiescent Current	8 mA - impacts standby power in always-on applications

Pinout & Package

Package: TO-220FP (3-pin, vertical mounting, isolated tab, plastic body with heat sink interface).

Pin/Terminal	Circuit Role	Design Meaning
1 (Input)	Voltage input terminal	Accepts unregulated DC input; must be decoupled with ≥0.33 µF capacitor close to pin
2 (Ground)	Common reference node	Return path for load current and internal bias; connects to system ground plane
3 (Output)	Regulated voltage source	Delivers stable 8 V; requires ≥0.1 µF output capacitor for transient stability

Key Features

Feature	Design Value
Thermal shutdown protection	Activates at ~165 °C junction temperature, preventing damage during sustained overload or poor heatsinking
Short-circuit current limit	0.45 A typical (L7808C), ensuring safe fault operation without external current-sense circuitry
Safe operating area (SOA) protection	Prevents secondary breakdown of internal pass transistor during high-voltage/low-current transients
Low output noise	52 µV/√Hz enables direct use in precision analog signal chains without post-regulation filtering
Extended temperature operation	Rated for 0 to 125 °C junction range (C version), supporting industrial ambient environments

Applications

Industrial PLC I/O Module Power

Automotive Body Control Unit (BCU)

Use Scenario: Provides clean 8 V rail for digital isolators, CAN transceivers, and microcontroller peripherals in programmable logic controller backplanes.

IC Role / Device Role / Timing Role: Local point-of-load regulator replacing centralized 24 V-to-8 V conversion, reducing distribution losses and EMI.

Use Value: Eliminates need for external thermal monitoring or foldback current limiting due to integrated SOA and thermal shutdown.

Use Scenario: Supplies auxiliary 8 V power to window lift controllers, seat motor drivers, and LED interior lighting modules.

IC Role / Device Role / Timing Role: Primary low-noise DC-DC stage downstream of automotive alternator rectifier and bulk filter.

Use Value: Withstands load dump transients up to 35 V input and delivers stable output despite battery voltage fluctuations (9–16 V).

Medical Patient Monitor Sensor Interface

Point-of-Sale Terminal Power Management

Use Scenario: Powers analog front-end amplifiers and 12-bit SAR ADCs in portable vital sign monitors requiring low-noise, low-drift bias.

IC Role / Device Role / Timing Role: Precision analog supply rail generator with <100 µV p-p ripple contribution.

Use Value: 52 µV/√Hz noise and −0.8 mV/°C drift ensure measurement accuracy across clinical operating temperatures.

Use Scenario: Regulates 8 V for thermal print head drivers, EMV smart card readers, and touch controller ICs in retail kiosks.

IC Role / Device Role / Timing Role: High-reliability fixed-output regulator with built-in short-circuit immunity for field-deployed equipment.

Use Value: Survives repeated hot-plug events and cable shorts without latch-up or degradation-no external fuse required.

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
LM7808CDT/NOPB	Higher quiescent current (6.5 mA typ), lower SVR (50 dB), wider input range (up to 35 V), TO-220 package	Less suitable for low-power standby modes; marginally lower noise rejection in noisy industrial settings	Select when legacy TI footprint compatibility is required and thermal performance is less constrained
MC7808BD2TR4G	±2 % output tolerance (same), higher short-circuit current (0.7 A), R_thJA = 50 °C/W (TO-220), no SOA protection	Improved thermal dissipation but lacks SOA guardbanding-requires careful layout to avoid secondary breakdown	Choose where peak fault energy is predictable and heatsink area is limited

Compared with LM7808CDT/NOPB and MC7808BD2TR4G, L7808CV-DG offers superior SOA protection and lower output noise (52 µV/√Hz vs. ≥65 µV/√Hz), making it preferred for safety-critical or precision analog applications where fault resilience and signal integrity are prioritized over minimal quiescent current.

Availability

L7808CV-DG is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, medical sensor interfaces, and point-of-sale terminal power systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for L7808CV-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, specializing in power management, microcontrollers, and automotive-grade ICs with ISO/TS 16949-certified manufacturing.

The L78 series was designed specifically for cost-sensitive, high-reliability linear regulation in industrial and automotive environments-emphasizing ruggedness, ease of use, and minimal external component count.

FAQ

What is the maximum allowable input voltage for L7808CV-DG?

The absolute maximum DC input voltage is 35 V when regulating an 8 V output, as specified in Table 1 of DS0422. Exceeding this risks permanent damage. For reliable operation, maintain VI ≤ 30 V with adequate heatsinking to keep junction temperature below 125 °C under full 1.5 A load.

Does L7808CV-DG require input and output capacitors?

Yes-STMicroelectronics specifies a minimum 0.33 µF ceramic capacitor at the input and 0.1 µF at the output, placed as close as possible to the respective pins. These stabilize internal control loop dynamics and suppress high-frequency noise; omitting them may cause oscillation or poor transient response.

Can L7808CV-DG be used in adjustable-output configurations?

Yes-though optimized as a fixed 8 V regulator, it can be configured for adjustable output using external resistors and a Zener diode on the ground pin, per Figure 4 in DS0422. Output voltage range and line/load regulation performance will differ from the fixed-mode specifications.

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

TO-220FP has R_thJA = 60 °C/W versus 50 °C/W for standard TO-220 (per Table 2). The FP variant features an isolated metal tab, enabling direct heatsink mounting without insulating washers-but its higher thermal resistance requires ~20 % larger heatsink area for equivalent 1.5 A operation at 125 °C ambient.

L7808CV-DG Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

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):: 8 mA

Current - Supply (Max):: -

PSRR:: 56dB (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

L7808CV-DG FAQ

1.How can I place an order for L7808CV-DG through Aetrix?

Please submit a Request for Quotation (RFQ) for L7808CV-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 L7808CV-DG reliable?

The price and inventory of L7808CV-DG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L7808CV-DG is usually 5 days.

3.What payment methods are accepted for L7808CV-DG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L7808CV-DG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L7808CV-DG?

L7808CV-DG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L7808CV-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 L7808CV-DG?

For technical support, including L7808CV-DG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L7808CV-DG requirements.

6.How does Aetrix verify that L7808CV-DG is sourced from the original manufacturer or authorized distributors?

All L7808CV-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 L7808CV-DG meets industry standards.

7.What is the process for return or replacement of L7808CV-DG?

All L7808CV-DG units undergo pre-shipment inspection (PSI). If there is an issue with L7808CV-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 L7808CV-DG part is unused and in its original packaging.

Return procedure for L7808CV-DG:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-11 Comparator Circuit: Voltage Thresholds, Op-Amp Differences, LM393 and Practical Design

Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.

2026-09-10 Schmitt Trigger Explained: Hysteresis, Circuits, Inverters and Applications

Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …