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

Diodes Incorporated AS7815AT-E1

Name: AS7815AT-E1
Brand: Diodes Incorporated
SKU: AS7815AT-E1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AS7815AT-E1

Manufacturer:: Diodes Incorporated

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

Package:: TO-220-3

Datasheet:: AS7815AT-E1.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AS7815AT-E1 from Diodes Incorporated is a 3-terminal fixed-output +15V positive linear voltage regulator in TO-220-3 (Option 1) package, delivering up to 1A output current with ±4% output voltage accuracy over –40°C to +125°C, internal thermal shutdown and short-circuit protection, used for post-regulation in switching power supplies and microprocessor power rails on motherboards.

For engineers reviewing the AS7815AT-E1 datasheet, AS7815AT-E1 pinout, AS7815AT-E1 application, or AS7815AT-E1 equivalent, key selection criteria include dropout voltage (2V at 1A), load regulation (70 mV), ripple rejection (58 dB at 120 Hz), and thermal resistance (θ_JA = 60°C/W in TO-220-3).

Technical Context

The AS7815AT-E1 implements a monolithic series-pass regulator architecture with built-in safe-area compensation, enabling stable operation under sustained overload without external current-limiting components. Its internal bandgap reference and error amplifier maintain output regulation across input voltages from 17.9V to 30V and load currents from 5mA to 1A.

Thermal shutdown activates at +150°C junction temperature, and short-circuit current limiting holds peak output current to 0.2A under VIN = 35V, ensuring robust fault tolerance. The device operates without external capacitors for stability but requires ≥0.33µF input and ≥0.1µF output ceramic capacitance per typical application circuit.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	+15.0 V nominal, ±4% over full temperature range - ensures compatibility with 15V logic and analog subsystems requiring tight DC rail tolerance.
Max Output Current	1 A continuous - supports high-current local regulation for FPGAs, DSPs, and analog front-ends without external pass transistors.
Dropout Voltage	2 V at I_OUT = 1 A, T_J = +25°C - defines minimum input–output differential needed to sustain regulation; impacts minimum input supply design.
Ripple Rejection	58 dB at 120 Hz, VIN = 18.5–28.5 V - suppresses low-frequency switching noise from upstream DC/DC converters in hybrid power architectures.
Line Regulation	150 mV over VIN = 17.9–30 V - quantifies output drift due to input variation; critical when feeding from unregulated or loosely regulated sources.
Load Regulation	150 mV over I_OUT = 5 mA–1 A - determines output voltage shift under dynamic load steps; affects precision analog supply stability.
Quiescent Current	3.4–6 mA at I_OUT = 0 - establishes no-load power loss; enables low-standby-power system designs when paired with enable-controlled upstream stages.

Pinout & Package

AS7815AT-E1 uses the TO-220-3 (Option 1) package: thermally enhanced plastic case with isolated tab, 1000-unit tube packaging, lead-free finish, RoHS compliant, and rated for 1.925 g mass.

Pin/Terminal	Circuit Role	Design Meaning
1 (INPUT)	Voltage Input	Accepts unregulated DC input (17.9–30 V); must be decoupled with ≥0.33 µF ceramic capacitor close to pin.
2 (GND)	Ground Reference	Common return path for input, output, and internal bias circuits; requires low-impedance PCB connection to minimize noise coupling.
3 (OUTPUT)	Voltage Output	Delivers regulated +15 V; requires ≥0.1 µF ceramic output capacitor for transient stability and ESR-dependent phase margin control.

Key Features

Feature	Design Value
Internal Short-Circuit Protection	Limits output current to ≤0.2 A during fault, preventing catastrophic failure and enabling safe auto-recovery after fault removal.
Thermal Shutdown	Activates at T_J = +150°C and holds output off until junction cools by ≥15°C - protects against sustained overload or inadequate heatsinking.
Safe-Area Compensation	Prevents secondary breakdown of the internal pass transistor under simultaneous high voltage and high current stress conditions.
Low Load Regulation	70 mV variation from 5 mA to 1 A load - maintains stable 15 V rail for mixed-signal systems with variable current draw.
Lead-Free & Green Packaging	TO-220-3 package meets RoHS 3 (2015/863/EU), halogen- and antimony-free (<900 ppm Br+Cl, <1000 ppm Sb) - satisfies industrial and automotive environmental compliance requirements.

Applications

Microprocessor Power Supply

Motherboard Local Regulation

Use Scenario: Providing clean, stable +15 V to analog sections of x86 or ARM-based CPU power delivery networks.

IC Role / Device Role / Timing Role: Final-stage linear regulator supplying bias voltage to ADC references, PLL VCOs, and op-amp rails.

Use Value: Delivers low-noise 15 V (10 µV/V RMS noise) with 58 dB ripple rejection, minimizing clock jitter and data converter SNR degradation.

Use Scenario: On-board regulation for legacy ISA/PCI peripheral slots requiring dedicated +15 V analog support rails.

IC Role / Device Role / Timing Role: Local point-of-load regulator placed adjacent to connector headers to reduce IR drop and noise coupling.

Use Value: 1 A output capacity and 150 mV load regulation ensure consistent voltage under hot-plug transients and multi-device insertion events.

Post-Regulation for Switching Supplies

Telecom Line Card Power

Use Scenario: Downstream filtering stage after a 24 V buck converter powering sensitive RF front-end modules.

IC Role / Device Role / Timing Role: Low-noise linear post-regulator suppressing switching artifacts from upstream DC/DC converters.

Use Value: 58 dB ripple rejection at 120 Hz and 10 µV/V output noise preserve signal integrity in low-phase-noise oscillator circuits.

Use Scenario: Powering line interface ICs (e.g., SLICs, codec amplifiers) in carrier-grade telecom access equipment.

IC Role / Device Role / Timing Role: Primary +15 V source for analog signal conditioning paths in voice/data line cards operating at –40°C to +75°C ambient.

Use Value: ±4% output accuracy over –40°C to +125°C junction temperature ensures reliable operation across extended industrial temperature range.

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 (TI)	Same TO-220-3 package, ±2% initial accuracy (tighter than AS7815AT-E1's ±4%), higher IQ (7.5 mA typ), lower PSRR (50 dB @ 120 Hz).	Preferred where tighter initial voltage tolerance is required, but less suitable for ultra-low-noise RF applications due to lower ripple rejection.	Select if absolute output accuracy dominates over noise performance and ripple suppression.
MC7815BD2TR4G (onsemi)	TO-220-3, ±4% accuracy, 2.5 V dropout (higher than AS7815AT-E1's 2 V), 65 dB PSRR @ 120 Hz, wider input range (up to 35 V).	Better suited for higher-input-voltage systems (e.g., 28 V avionics buses), but higher dropout reduces usable input headroom.	Choose when input voltage exceeds 30 V or higher PSRR is prioritized over minimal dropout.

Compared with LM7815CDT/NOPB and MC7815BD2TR4G, AS7815AT-E1 offers the lowest dropout (2 V) and best balance of thermal robustness (150°C shutdown), RoHS/Green compliance, and cost-effective TO-220-3 packaging for industrial motherboard and telecom line card use cases.

Availability

AS7815AT-E1 is available at Aetrix Electronics and suitable for microprocessor power supplies, motherboard local regulation, and telecom line card power requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for AS7815AT-E1 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 manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.

The AS78XXA series targets cost-sensitive, high-reliability linear regulation in industrial, computing, and communications infrastructure, emphasizing thermal resilience, integrated protection, and environmental compliance without external components.

FAQ

What is the maximum input voltage for AS7815AT-E1?

The absolute maximum input voltage is 36 V, but the recommended operating range is 17.9 V to 30 V per datasheet Section 4. Exceeding 30 V risks exceeding power dissipation limits and triggering thermal shutdown, especially at high output current and ambient temperature.

Does AS7815AT-E1 require external capacitors?

Yes - a minimum 0.33 µF ceramic capacitor must be placed between INPUT and GND, and a minimum 0.1 µF ceramic capacitor between OUTPUT and GND. These are mandatory for stability and transient response; tantalum or aluminum electrolytics are not recommended due to ESR-related phase margin issues.

Is AS7815AT-E1 qualified for automotive applications?

No - AS7815AT-E1 is not AEC-Q100 qualified. Diodes states that automotive-grade variants require specific change control, PPAP capability, and IATF 16949 manufacturing; users needing automotive qualification must contact Diodes directly for alternate part numbers.

How does thermal performance differ between TO-220-3 and TO-252 packages?

AS7815AT-E1 in TO-220-3 has θ_JA = 60°C/W (no heatsink) and θ_JC = 9°C/W; TO-252 variants (e.g., AS7815ADTR-G1) have θ_JA = 100°C/W and θ_JC = 16°C/W. The TO-220-3 delivers superior thermal transfer to external heatsinks, enabling higher continuous current in space-constrained industrial enclosures.

AS7815AT-E1 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Active

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-E1 FAQ

1.How can I place an order for AS7815AT-E1 through Aetrix?

Please submit a Request for Quotation (RFQ) for AS7815AT-E1 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-E1 reliable?

The price and inventory of AS7815AT-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AS7815AT-E1 is usually 5 days.

3.What payment methods are accepted for AS7815AT-E1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AS7815AT-E1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AS7815AT-E1?

AS7815AT-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AS7815AT-E1 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-E1?

For technical support, including AS7815AT-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AS7815AT-E1 requirements.

6.How does Aetrix verify that AS7815AT-E1 is sourced from the original manufacturer or authorized distributors?

All AS7815AT-E1 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-E1 meets industry standards.

7.What is the process for return or replacement of AS7815AT-E1?

All AS7815AT-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AS7815AT-E1, 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-E1 part is unused and in its original packaging.

Return procedure for AS7815AT-E1:

1.Submit a request within 90 days.

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

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