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

STMicroelectronics L7805AC-D2TR

Name: L7805AC-D2TR
Brand: STMicroelectronics
SKU: L7805AC-D2TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L7805AC-D2TR

Manufacturer:: STMicroelectronics

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

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

Datasheet:: L7805AC-D2TR.pdf

Description:: IC REG LINEAR 5V 1.5A D2PAK

Quantity:: RFQ Add To RFQ list

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Inventory:4,015

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Product details

Overview

L7805AC-D2TR from STMicroelectronics is a three-terminal positive fixed-voltage linear regulator delivering 5 V ±2 % output with up to 1.5 A continuous current, thermal overload and short-circuit protection, and operation across 0 °C to 125 °C junction temperature-used for local on-card regulation in industrial power supplies and embedded control modules.

For engineers reviewing the L7805AC-D2TR datasheet, L7805AC-D2TR pinout, L7805AC-D2TR application, or L7805AC-D2TR equivalent, this page provides verified electrical characteristics, package-specific thermal data, load/line regulation behavior at 1 A, dropout voltage (2 V), and noise performance (40 µV/√Hz) under real operating conditions.

Technical Context

This IC implements a monolithic series-pass linear regulation architecture with internal current limiting, safe operating area (SOA) protection, and thermal shutdown-enabling robust local DC-DC conversion without external compensation. It requires only two external capacitors (0.33 µF input, 0.1 µF output) for stable operation.

Designed for fixed-output use, it supports adjustable configurations via external resistive networks but is optimized for simplicity in low-noise, moderate-power applications where PSRR (62 dB at 120 Hz) and low output resistance (17 mΩ) are critical for analog subsystems and microcontroller power rails.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5 V ±2 % (4.9–5.1 V at 25 °C; 4.75–5.25 V over full load/temp range)
Max Output Current	1.5 A continuous-supports motor drivers, sensor interfaces, and MCU cores requiring stable 5 V under transient loads
Dropout Voltage	2 V at 1 A-requires minimum 7 V input for regulated 5 V output; impacts efficiency in battery-powered designs
Supply Rejection	62 dB at 120 Hz-effectively attenuates ripple from rectified AC or switching pre-regulators
Output Noise	40 µV/√Hz (10 Hz–100 kHz)-suitable for analog front-ends and precision ADC references
Thermal Protection	Auto-shutdown at safe junction temperature-prevents damage during sustained overload or inadequate heatsinking
Quiescent Current	8 mA typical-low enough for always-on systems but higher than ultra-low-I_Q alternatives

Pinout & Package

D²PAK (TO-263) surface-mount package with exposed thermal pad for enhanced heat dissipation; thermally optimized for high-current operation without through-hole mounting.

Pin/Terminal	Circuit Role	Design Meaning
1 (Input)	V_IN	Unregulated DC input (7–35 V); must exceed V_OUT + V_DROP (≥7 V) for regulation
2 (Ground)	GND	Common reference for input/output; connects to thermal pad for optimal heat transfer
3 (Output)	V_OUT	Stable 5 V output; requires 0.1 µF ceramic capacitor placed near pin for stability

Key Features

Feature	Design Value
Fixed 5 V output with ±2 % tolerance	Ensures compatibility with 5 V TTL, USB peripherals, and legacy microcontrollers without trimming
Internal SOA and thermal shutdown	Enables fault resilience in unattended industrial equipment without external protection circuitry
Low output impedance (17 mΩ)	Maintains tight regulation under dynamic load steps-critical for digital logic supply integrity
Guaranteed operation to 125 °C junction	Supports deployment in engine control units, power converters, and enclosed enclosures without derating
Minimal external components (2 caps)	Reduces BOM count and PCB area-ideal for cost-sensitive, space-constrained consumer and industrial boards

Applications

Industrial PLC I/O Modules

Automotive Body Control Units

Use Scenario: Powering isolated digital I/O channels and analog sensor signal conditioning circuits in DIN-rail mounted controllers.

IC Role / Device Role / Timing Role: Local 5 V rail generator providing clean, protected power to optocouplers, ADCs, and level translators.

Use Value: Eliminates single-point regulation distribution losses and improves noise immunity in electrically noisy factory environments.

Use Scenario: Supplying 5 V to microcontrollers, CAN transceivers, and LED drivers in door modules and lighting control nodes.

IC Role / Device Role / Timing Role: Primary linear regulator for low-power subsystems requiring automotive-grade temperature range (−40 °C to 125 °C).

Use Value: Delivers guaranteed operation across extreme ambient temperatures while meeting OEM short-circuit and thermal stress requirements.

Medical Diagnostic Equipment

Point-of-Sale Terminal Power

Use Scenario: Providing stable 5 V to precision op-amps, reference buffers, and touch-screen controllers in portable ultrasound and patient monitors.

IC Role / Device Role / Timing Role: Low-noise analog supply regulator ensuring <40 µV RMS noise does not degrade signal-to-noise ratio in sensitive front-ends.

Use Value: Meets IEC 60601-1 EMI and safety margins without additional filtering or shielding layers.

Use Scenario: Regulating 5 V for thermal printers, barcode scanners, and secure payment processors in retail kiosks.

IC Role / Device Role / Timing Role: Mainboard power regulator handling pulsed loads from motors and RF modules with fast transient response.

Use Value: Maintains regulation during 1.5 A peak printer head activation without brownout or reset events.

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
LM7805CD2T	±2 % output tolerance, TO-263 package, 1.5 A rating, but lower PSRR (55 dB) and higher noise (75 µV/√Hz)	Less suitable for noise-sensitive analog circuits; acceptable for digital-only loads	Select when cost is prioritized over analog performance and thermal margin is sufficient
MC7805BD2TR4	±4 % tolerance, D²PAK, 1.5 A, wider input range (up to 35 V), but no extended temp grade (0–125 °C only)	Not qualified for automotive or extended industrial environments requiring −40 °C startup	Choose for general-purpose commercial equipment where tighter voltage accuracy is non-critical

Compared with LM7805CD2T and MC7805BD2TR4, the L7805AC-D2TR offers superior voltage accuracy (±2 % vs. ±4 %), higher PSRR (62 dB), and guaranteed operation across the full industrial temperature range-making it the preferred choice for mission-critical analog and automotive subsystems.

Availability

L7805AC-D2TR is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control units, medical diagnostic devices, and point-of-sale terminals requiring stable component supply with long-term lifecycle support.

Supply support for L7805AC-D2TR 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 silicon solutions for automotive, industrial, and power management applications.

The L78 series targets cost-effective, rugged linear regulation in space- and reliability-constrained embedded systems-emphasizing fault tolerance, minimal external components, and wide-temperature operation without complex design-in overhead.

FAQ

What is the minimum input voltage required for stable 5 V output?

The L7805AC-D2TR requires a minimum input voltage of 7 V to maintain regulation at full load (1.5 A), based on its 2 V dropout voltage specification. Below 7 V, output voltage drops linearly with input; operation below 7 V is unsupported and may cause instability or thermal shutdown.

Can this regulator be used without a heatsink?

At ≤500 mA load and ambient temperature ≤40 °C, the D²PAK package can operate without an external heatsink due to its 62.5 °C/W junction-to-ambient thermal resistance. Above 500 mA or in elevated ambient conditions, a copper pour or dedicated heatsink is required to keep junction temperature below 125 °C.

Does L7805AC-D2TR require input and output capacitors?

Yes-STMicroelectronics specifies a 0.33 µF ceramic capacitor on the input and a 0.1 µF ceramic capacitor on the output, placed as close as possible to the device pins. Omitting either capacitor risks oscillation, poor transient response, or failure to regulate under load changes.

How does short-circuit protection behave during fault conditions?

Under short-circuit, the device limits output current to 0.75 A (typical) and activates thermal shutdown if junction temperature exceeds safe limits. After fault removal and cooldown, it automatically recovers-no latch or manual reset is needed, enabling self-recovering power systems.

L7805AC-D2TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 35V

Voltage - Output (Min/Fixed):: 5V

Voltage - Output (Max):: -

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

Current - Output:: 1.5A

Current - Quiescent (Iq):: 6 mA

Current - Supply (Max):: -

PSRR:: 68dB (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

L7805AC-D2TR FAQ

1.How can I place an order for L7805AC-D2TR through Aetrix?

Please submit a Request for Quotation (RFQ) for L7805AC-D2TR 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 L7805AC-D2TR reliable?

The price and inventory of L7805AC-D2TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L7805AC-D2TR is usually 5 days.

3.What payment methods are accepted for L7805AC-D2TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L7805AC-D2TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L7805AC-D2TR?

L7805AC-D2TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L7805AC-D2TR 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 L7805AC-D2TR?

For technical support, including L7805AC-D2TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L7805AC-D2TR requirements.

6.How does Aetrix verify that L7805AC-D2TR is sourced from the original manufacturer or authorized distributors?

All L7805AC-D2TR 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 L7805AC-D2TR meets industry standards.

7.What is the process for return or replacement of L7805AC-D2TR?

All L7805AC-D2TR units undergo pre-shipment inspection (PSI). If there is an issue with L7805AC-D2TR, 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 L7805AC-D2TR part is unused and in its original packaging.

Return procedure for L7805AC-D2TR:

1.Submit a request within 90 days.

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

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