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

Diodes Incorporated AS7815AT-G1

Name: AS7815AT-G1
Brand: Diodes Incorporated
SKU: AS7815AT-G1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AS7815AT-G1

Manufacturer:: Diodes Incorporated

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

Package:: TO-220-3

Datasheet:: AS7815AT-G1.pdf

Description:: IC REG LINEAR 15V 1A TO220-3

Quantity:: RFQ Add To RFQ list

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Inventory:2,722

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Product details

Overview

AS7815AT-G1 from Diodes Incorporated is a fixed-output +15 V, 1 A three-terminal positive linear voltage regulator in TO-220-3 package with internal current limiting, thermal shutdown, and safe-area protection. It delivers stable regulation for microprocessor power supplies and post-regulation of switching supplies, supporting input voltages up to 32 V and operating across –40 °C to +125 °C junction temperature.

For engineers reviewing the AS7815AT-G1 datasheet, AS7815AT-G1 pinout, AS7815AT-G1 application, or AS7815AT-G1 equivalent, key selection criteria include dropout voltage (2 V at 1 A), output voltage accuracy (±4% over full temperature range), load regulation (70 mV max), ripple rejection (58 dB at 120 Hz), and thermal resistance (60 °C/W θ_JA in TO-220-3).

Technical Context

The AS7815AT-G1 implements a monolithic series-pass regulator architecture with built-in short-circuit current limiting, thermal overload protection, and output transistor safe-area compensation. Its internal circuitry ensures immunity to sustained output overload when adequate heatsinking is applied.

It operates with a minimum input-to-output differential of 2 V at full 1 A load and maintains stable regulation without external components-only requiring 0.33 µF input and 0.1 µF output capacitors per typical application circuit. The device exhibits low quiescent current (3.4–6 mA) and low output resistance (11 mΩ).

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	+15 V nominal, ±4% tolerance over –40 °C to +125 °C - ensures stable rail for logic and analog circuits under thermal stress
Max Output Current	1 A continuous - supports high-current local regulation for microprocessors and FPGAs
Input Voltage Range	17.9 V to 32 V - compatible with 24 V industrial bus and post-switching-supply applications
Dropout Voltage	2 V at 1 A, 25 °C - defines minimum headroom needed for regulation; impacts thermal design
Ripple Rejection	58 dB at 120 Hz - suppresses low-frequency switching noise from upstream DC/DC converters
Line Regulation	150 mV max over full input range - limits output drift due to input rail variation
Load Regulation	150 mV max from 5 mA to 1 A - ensures consistent voltage under dynamic load changes
Thermal Resistance θ_JA	60 °C/W (TO-220-3) - determines heatsink requirement for 1 A operation at elevated ambient

Pinout & Package

AS7815AT-G1 is supplied in the TO-220-3 package (lead-free, RoHS-compliant), featuring a metal tab electrically connected to Pin 2 (GND) and optimized for vertical mounting with heatsink interface.

Pin/Terminal	Circuit Role	Design Meaning
1	INPUT	Voltage input terminal; must be decoupled with ≥0.33 µF capacitor close to pin to prevent oscillation
2	GND	Ground reference and thermal path; metal tab is internally tied to this pin - critical for thermal management
3	OUTPUT	Regulated +15 V output; requires ≥0.1 µF ceramic capacitor at pin for stability and transient response

Key Features

Feature	Design Value
Internal Short-Circuit Protection	Limits output current to ~0.2 A during fault - prevents damage without external current-sense circuitry
Thermal Shutdown Activation	Triggers at +150 °C junction temperature - provides fail-safe shutdown before silicon degradation
Safe-Area Compensation	Prevents second breakdown in output transistor under high-voltage/high-current transients - enables robust operation without SOA derating
Low Load Regulation	70 mV max deviation from 5 mA to 1 A - minimizes voltage sag during processor core wake-up events
Lead-Free & Halogen-Free Construction	RoHS 3 compliant, <900 ppm Br+Cl, <1000 ppm Sb - meets automotive and industrial environmental compliance mandates

Applications

Microprocessor Power Supply

Post-Regulation for Switching Supplies

Use Scenario: Providing clean, low-noise +15 V bias to FPGA I/O banks or analog front-end circuitry on embedded control boards.

IC Role / Device Role / Timing Role: Primary local voltage regulator delivering stable rail independent of main system supply ripple.

Use Value: 10 µV/V output noise and 58 dB ripple rejection ensure signal integrity for precision ADCs and high-speed interfaces.

Use Scenario: Tightening output voltage tolerance of a 24 V buck converter feeding analog instrumentation subsystems.

IC Role / Device Role / Timing Role: Linear post-regulator correcting residual switching noise and line/load variation from upstream DC/DC stage.

Use Value: 150 mV load regulation and 150 mV line regulation maintain ±1% output accuracy despite upstream converter drift.

Motherboard Local Regulation

Telecom Line Card Power

Use Scenario: Generating auxiliary +15 V for op-amp rails, fan controllers, and sensor interfaces on server motherboard VRMs.

IC Role / Device Role / Timing Role: Distributed point-of-load regulator placed near high-current analog loads to minimize PCB trace IR drop.

Use Value: TO-220-3 package with GND-connected tab enables direct bolt-down heatsinking - sustains 1 A continuously at 70 °C ambient.

Use Scenario: Powering relay drivers and line interface ICs in telecom access equipment operating in extended temperature environments.

IC Role / Device Role / Timing Role: High-reliability linear regulator qualified for industrial temperature range (–40 °C to +125 °C).

Use Value: ±4% output accuracy maintained across full temperature range eliminates need for external trimming in field-deployed units.

Equivalent & Alternatives

The following parts are listed as comparable options for similar +15 V linear regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM7815CDT/NOPB	Higher dropout (2.5 V), higher θ_JA (65 °C/W), ±2% initial accuracy but wider temp drift (±100 ppm/°C)	Less suitable for low-headroom 24 V systems; lower thermal margin at 1 A	Prefer AS7815AT-G1 where input headroom is constrained or thermal performance is critical
MC7815BD2TR4	Same dropout (2 V), but higher quiescent current (6–8 mA) and no "Green" halogen-free certification	Not compliant with latest environmental standards for industrial or automotive deployments	Choose AS7815AT-G1 for RoHS 3, halogen-free, and lower IQ requirements

Compared with LM7815CDT/NOPB and MC7815BD2TR4, the AS7815AT-G1 offers tighter thermal resistance (60 vs. 65 °C/W), lower quiescent current (3.4–6 mA vs. ≥6 mA), and full halogen/antimony-free compliance - making it preferable for thermally dense, environmentally regulated, and energy-sensitive designs.

Availability

AS7815AT-G1 is available at Aetrix Electronics and suitable for microprocessor power supplies, telecom line card power, and motherboard local regulation requiring stable component supply, long-term lifecycle support, and RoHS 3/halogen-free compliance.

Supply support for AS7815AT-G1 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

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal devices, with manufacturing certified to IATF 16949 and quality systems aligned to AEC-Q200 for industrial and automotive applications.

The AS78XXA series belongs to Diodes' legacy linear regulator product line, engineered for cost-effective, robust local regulation in industrial, computing, and telecom infrastructure where simplicity, reliability, and thermal resilience are prioritized over ultra-low IQ or adjustable output.

FAQ

What is the maximum input voltage for AS7815AT-G1?

The absolute maximum input voltage is 36 V, but the recommended operating maximum is 32 V per datasheet specifications. Exceeding 32 V risks exceeding safe power dissipation limits at full 1 A load, especially above 25 °C ambient. Thermal derating must be applied above 32 V, and operation beyond 36 V may cause permanent damage.

Does AS7815AT-G1 require external capacitors?

Yes - a minimum 0.33 µF ceramic or tantalum capacitor is required on the INPUT pin, and a minimum 0.1 µF ceramic capacitor on the OUTPUT pin. These stabilize internal feedback and prevent oscillation. Larger values (e.g., 10 µF electrolytic + 0.1 µF ceramic) improve transient response and ripple suppression in high-dynamic-load applications.

Is the metal tab on the TO-220-3 package electrically connected?

Yes - the metal tab is internally connected to Pin 2 (GND). This provides both a low-impedance ground return and primary thermal conduction path. When mounting to a heatsink, electrical isolation (e.g., mica washer + thermal grease) is required unless the heatsink is grounded; otherwise, short-circuit risk exists.

Can AS7815AT-G1 be used in automotive applications?

AS7815AT-G1 is not AEC-Q100 qualified. While it operates across –40 °C to +125 °C and meets RoHS 3, Diodes explicitly states that automotive-grade variants require specific change control, PPAP capability, and IATF 16949 manufacturing - none of which apply to the standard AS7815AT-G1. For automotive use, contact Diodes for qualified alternatives such as the AP7361 series or AEC-Q100-compliant regulators.

AS7815AT-G1 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 32V

Voltage - Output (Min/Fixed):: 15V

Voltage - Output (Max):: -

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

Current - Output:: 1A

Current - Quiescent (Iq):: 6 mA

Current - Supply (Max):: -

PSRR:: 58dB (120Hz)

Control Features:: -

Protection Features:: Over Temperature, Short Circuit

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220-3

AS7815AT-G1 FAQ

1.How can I place an order for AS7815AT-G1 through Aetrix?

Please submit a Request for Quotation (RFQ) for AS7815AT-G1 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 AS7815AT-G1 reliable?

The price and inventory of AS7815AT-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AS7815AT-G1 is usually 5 days.

3.What payment methods are accepted for AS7815AT-G1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AS7815AT-G1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AS7815AT-G1?

AS7815AT-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AS7815AT-G1 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 AS7815AT-G1?

For technical support, including AS7815AT-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AS7815AT-G1 requirements.

6.How does Aetrix verify that AS7815AT-G1 is sourced from the original manufacturer or authorized distributors?

All AS7815AT-G1 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 AS7815AT-G1 meets industry standards.

7.What is the process for return or replacement of AS7815AT-G1?

All AS7815AT-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AS7815AT-G1, 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 AS7815AT-G1 part is unused and in its original packaging.

Return procedure for AS7815AT-G1:

1.Submit a request within 90 days.

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

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