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Diodes Incorporated AS7805ADTR-E1
- Part No.:
- AS7805ADTR-E1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
AS7805ADTR-E1.pdf
- Description:
- IC REG LINEAR 5V 1A TO252-2
- Quantity:
- Payment:
- Shipping:
Inventory:2,062
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Product details
Overview
AS7805ADTR-E1 from Diodes Incorporated is a fixed 5V, 1A three-terminal positive linear voltage regulator in TO-252-2 (5) / TO252 (Type CJ) package, featuring internal current limiting, thermal shutdown, and safe-area protection. It delivers stable output under load currents up to 1A with ±4% output voltage accuracy across –40°C to +125°C, and supports post-regulation for switching supplies and microprocessor power rails.
For engineers reviewing the AS7805ADTR-E1 datasheet, AS7805ADTR-E1 pinout, AS7805ADTR-E1 application, or AS7805ADTR-E1 equivalent, key selection criteria include dropout voltage (2V at 1A), line/load regulation (≤50 mV), PSRR (70 dB at 120 Hz), thermal resistance (θJA = 100°C/W), and RoHS-compliant "Green" lead-free packaging.
Technical Context
The AS7805ADTR-E1 implements a monolithic series-pass regulator architecture with integrated bandgap reference, error amplifier, and Darlington output transistor. Its safe-area compensation ensures robust short-circuit survival without external foldback circuitry.
It operates with input voltages from 7.5V to 25V and maintains regulation over junction temperatures from –40°C to +125°C. The device's low quiescent current (3.2–6 mA) and 10 µV/VOUT output noise support precision analog and mixed-signal applications requiring clean DC rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±4% over full temperature range - ensures stable logic supply for 5V microcontrollers and peripherals |
| Max Output Current | 1 A continuous - sufficient for FPGA I/O banks, sensor interfaces, and local board-level regulation |
| Dropout Voltage | 2 V at 1 A, TJ = +25°C - enables operation with minimal VIN–VOUT headroom in constrained power systems |
| Line Regulation | ≤50 mV (VIN = 7.5–20 V) - rejects input ripple and transient variations in upstream converters |
| Load Regulation | ≤50 mV (IOUT = 5 mA–1 A) - maintains tight voltage stability across dynamic load steps |
| PSRR | 70 dB at 120 Hz - suppresses switching noise from buck/boost pre-regulators |
| Thermal Resistance θJA | 100°C/W (TO-252-2) - requires PCB copper area ≥7 cm² for full 1A operation at +70°C ambient |
Pinout & Package
AS7805ADTR-E1 uses the TO-252-2 (5) / TO252 (Type CJ) surface-mount package, with exposed thermal pad for enhanced heat dissipation. Pin 1 is INPUT, Pin 2 is GND, and Pin 3 is OUTPUT - matching standard 3-pin linear regulator layout for drop-in compatibility with legacy designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INPUT) | Voltage Input | Accepts unregulated DC input (7.5–25 V); requires 0.33 µF ceramic capacitor close to pin for stability |
| 2 (GND) | Ground Reference | Common return path for input and output circuits; must be low-impedance connection to minimize noise coupling |
| 3 (OUTPUT) | Voltage Output | Delivers regulated 5 V; requires 0.1 µF ceramic capacitor directly at pin for high-frequency decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Internal Short-Circuit Protection | Limits output current to ~50 mA during sustained fault - prevents thermal runaway without external current-sense components |
| Thermal Shutdown | Activates at TJ ≈ +150°C - disables output until junction cools below hysteresis threshold (~135°C) |
| Safe-Area Compensation | Prevents secondary breakdown of output transistor during overload - eliminates need for external SOA protection networks |
| RoHS & Halogen-Free "Green" Packaging | TO-252-2 (5) with <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - meets automotive and industrial environmental compliance requirements |
| Low Output Noise | 10 µV/VOUT (10 Hz–100 kHz) - suitable for ADC reference supplies and audio bias rails |
Applications
| Microprocessor Power Supply | Post-Regulation for Switching Supplies |
|---|---|
|
Use Scenario: Providing clean 5V rail to ARM Cortex-M4 MCU and peripheral ICs on a compact industrial control PCB. IC Role / Device Role / Timing Role: Primary local voltage regulator delivering stable VCC to digital logic and analog subsystems. Use Value: Maintains ±4% output accuracy across –40°C to +125°C ambient, ensuring reliable boot and runtime operation without external trimming. |
Use Scenario: Final-stage regulation after a 12V-to-6V buck converter powering sensitive analog sensors and DACs. IC Role / Device Role / Timing Role: Low-noise linear post-regulator suppressing switching ripple and EMI from upstream DC/DC stage. Use Value: Delivers 70 dB PSRR at 120 Hz and 10 µV/VOUT broadband noise, enabling 12-bit ADC performance without additional filtering. |
| Motherboard Local Regulation | Telecom Line Card Power |
|
Use Scenario: On-board 5V supply for USB PHY, PCIe clock buffers, and management controllers in server motherboard VRM architecture. IC Role / Device Role / Timing Role: Secondary point-of-load regulator handling transient loads up to 1A with fast recovery from load steps. Use Value: Achieves ≤50 mV load regulation and 2.2 A peak current capability, supporting burst-mode processor activity without brownout. |
Use Scenario: Powering Ethernet PHYs and optical transceiver modules in carrier-grade access equipment operating at +70°C ambient. IC Role / Device Role / Timing Role: High-reliability linear regulator with thermal shutdown and safe-area protection for mission-critical telecom hardware. Use Value: Operates continuously at 1A with θJA = 100°C/W when mounted on 7 cm² copper pour, meeting Telcordia GR-63-CORE thermal requirements. |
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 |
|---|---|---|---|
| LM7805CDT-TR | TO-252 package, ±2% output tolerance (tighter), higher IQ (5.5–8 mA), θJA = 65°C/W | Better accuracy and thermal performance but higher quiescent draw; not "Green" halogen-free | Preferred where tighter VOUT tolerance is critical and halogen-free compliance is not required |
| MC7805BDTRKG | TO-252 package, ±4% tolerance, lower PSRR (65 dB), wider input range (7–35 V) | Higher input voltage capability but reduced ripple rejection; no safe-area compensation | Selected when input can exceed 25 V and PSRR >70 dB is not needed |
Compared with LM7805CDT-TR and MC7805BDTRKG, AS7805ADTR-E1 offers halogen-free "Green" compliance and integrated safe-area protection-critical for long-life industrial deployments-while trading slight PSRR and IQ for broader environmental certification and robustness under overload.
Availability
AS7805ADTR-E1 is available at Aetrix Electronics and suitable for microprocessor power supplies, post-regulation for switching supplies, and telecom line card power requiring stable component supply, RoHS/Green compliance, and thermal reliability in extended temperature environments.
Supply support for AS7805ADTR-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, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and communications markets.
The AS78XXA series targets cost-sensitive, thermally demanding linear regulation applications where internal protection, wide temperature operation, and environmental compliance are mandatory - not just optional features.
FAQ
What is the minimum input voltage required for AS7805ADTR-E1 to maintain regulation at 1A output?
The AS7805ADTR-E1 requires a minimum input voltage of 7.5 V to sustain 5 V output at 1 A load, based on its 2 V dropout specification at +25°C junction temperature. At elevated temperatures or worst-case process corners, VIN ≥ 8 V is recommended to ensure margin across –40°C to +125°C operation.
Does AS7805ADTR-E1 require external capacitors, and what values are specified?
Yes - AS7805ADTR-E1 requires a 0.33 µF ceramic capacitor between INPUT and GND, and a 0.1 µF ceramic capacitor between OUTPUT and GND, both placed within 5 mm of their respective pins. These values are validated for stability per DS36562 Rev. 7; larger values may improve transient response but do not affect basic regulation.
How does the thermal shutdown behavior of AS7805ADTR-E1 interact with safe-area protection?
Safe-area protection limits power dissipation during overload before thermal shutdown activates; it prevents second breakdown of the output transistor by dynamically reducing current as VCE rises. Thermal shutdown then engages only if junction temperature exceeds ~150°C - providing two-tiered protection that avoids nuisance tripping during brief surges while ensuring absolute safety under sustained fault.
Is AS7805ADTR-E1 qualified for automotive applications per AEC-Q100?
No - AS7805ADTR-E1 is not AEC-Q100 qualified. Diodes Incorporated explicitly states that automotive-grade variants require specific change control, PPAP capability, and IATF 16949 manufacturing; this part is intended for industrial, computing, and telecom applications. For automotive use, contact Diodes' automotive team for qualified alternatives such as the AZ series.
AS7805ADTR-E1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 25V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 2V @ 1A (Typ)
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 6 mA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-252-3
AS7805ADTR-E1 FAQ
1.How can I place an order for AS7805ADTR-E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AS7805ADTR-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 AS7805ADTR-E1 reliable?
The price and inventory of AS7805ADTR-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AS7805ADTR-E1 is usually 5 days.
3.What payment methods are accepted for AS7805ADTR-E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AS7805ADTR-E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AS7805ADTR-E1?
AS7805ADTR-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AS7805ADTR-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 AS7805ADTR-E1?
For technical support, including AS7805ADTR-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AS7805ADTR-E1 requirements.
6.How does Aetrix verify that AS7805ADTR-E1 is sourced from the original manufacturer or authorized distributors?
All AS7805ADTR-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 AS7805ADTR-E1 meets industry standards.
7.What is the process for return or replacement of AS7805ADTR-E1?
All AS7805ADTR-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AS7805ADTR-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 AS7805ADTR-E1 part is unused and in its original packaging.
Return procedure for AS7805ADTR-E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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