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Diodes Incorporated AS78L05MTR-E1
- Part No.:
- AS78L05MTR-E1
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AS78L05MTR-E1.pdf
- Description:
- IC REG LINEAR 5V 100MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,856
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Product details
Overview
AS78L05MTR-E1 from Diodes Incorporated is a fixed-output +5V, 100mA positive voltage regulator in SOIC-8 package with ±5% output voltage accuracy over −40°C to +125°C, 1.7V dropout at 40mA, and integrated thermal shutdown and short-circuit protection. It delivers local regulation for microprocessor core logic, embedded controllers, and low-power analog subsystems requiring stable 5V supply under varying load and input conditions.
For engineers reviewing the AS78L05MTR-E1 datasheet, AS78L05MTR-E1 pinout, AS78L05MTR-E1 application, or AS78L05MTR-E1 equivalent, this page provides verified electrical specifications, SOIC-8 terminal mapping, real-world use cases in consumer and industrial electronics, and validated alternative parts with documented functional differences.
Technical Context
The AS78L05MTR-E1 implements a monolithic series pass regulator architecture with internal current limiting, safe-area compensation, and thermal overload protection. Its SOIC-8 variant includes two dedicated GND pins (pins 1 and 4) and two NC terminals (pins 2 and 3), enabling improved thermal dissipation and noise isolation versus 3-pin packages.
It operates across 7–20V input range with 47–62dB ripple rejection at 120Hz, 40µV RMS output noise (10Hz–100kHz), and 84ppm/°C output voltage temperature coefficient. Quiescent current remains stable at 3–5.5mA across temperature and load, supporting battery-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0V ±5% (4.75–5.25V) across −40°C to +125°C - ensures reliable logic-level compatibility with 5V TTL/CMOS systems |
| Max Output Current | 100mA continuous - sufficient for powering microcontroller peripherals, sensors, and small logic blocks without external boost |
| Dropout Voltage | 1.7V at 40mA - enables operation from 7V input while maintaining regulation, critical for legacy 9V or 12V rail derating |
| Line Regulation | 8–150mV over 7–20V input - minimizes output drift during input ripple or brown-out events |
| Load Regulation | 10–60mV over 1–100mA load - maintains tight voltage stability across dynamic current demands |
| PSRR | 47–62dB at 120Hz - suppresses AC line noise and switching supply coupling into sensitive analog sections |
| Thermal Resistance θJA | 62°C/W (SOIC-8) - requires minimal PCB copper area for thermal management at full load |
Pinout & Package
AS78L05MTR-E1 uses an 8-pin SOIC package (JEDEC MS-012) with dual ground paths and two no-connect terminals to reduce thermal resistance and improve noise immunity. Pin 1 and Pin 4 are both GND; Pins 2 and 3 are NC and must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Primary ground reference for regulator feedback and pass transistor emitter; connects to main system ground plane |
| 2 | NC | No internal connection; must be left floating to avoid parasitic coupling or thermal stress |
| 3 | NC | No internal connection; electrically isolated; serves as mechanical anchor and thermal relief pad |
| 4 | GND | Secondary ground path for improved thermal conduction and reduced ground loop impedance |
| 5 | INPUT | Unregulated DC input (7–20V); requires ≥0.33µF ceramic bypass capacitor placed within 5mm |
| 6 | OUTPUT | Stabilized +5V output; requires ≥0.1µF ceramic output capacitor for stability and noise filtering |
| 7 | GND | Not used - pin 7 is GND in standard SOIC-8 but assigned as GND only in pin 1/4 per Diodes' AS78LXX SOIC layout |
| 8 | GND | Not used - pin 8 is GND in standard SOIC-8 but not connected internally in AS78L05MTR-E1 |
Key Features
| Feature | Design Value |
|---|---|
| Integrated thermal shutdown | Activates at TJ ≥150°C and auto-recovers after cooldown - eliminates need for external thermal monitoring circuitry |
| Internal short-circuit current limit | Clamps output current to safe level during fault - prevents damage to regulator and upstream power source |
| No external components required | Operates stably with only input/output capacitors - reduces BOM count and board space vs. adjustable regulators |
| Safe-area compensated pass transistor | Prevents secondary breakdown under high VIN–VOUT and high-current conditions - enhances reliability in transient-heavy environments |
Applications
| Consumer Remote Controls | Industrial Sensor Nodes |
|---|---|
Use Scenario: Powering IR LED drivers and low-power MCU in battery-operated infrared remotes. IC Role / Device Role / Timing Role: Local 5V regulator supplying clean power to 8-bit microcontroller and signal conditioning circuitry. Use Value: 40µV output noise and 62dB PSRR prevent IR carrier distortion; 100mA capacity supports burst-mode LED drive. |
Use Scenario: Providing regulated 5V to MEMS pressure sensors and ADC front-ends in factory-floor environmental monitors. IC Role / Device Role / Timing Role: On-sensor-board voltage stabilization ensuring accurate analog measurement integrity. Use Value: ±5% output tolerance and 84ppm/°C TC maintain sensor excitation accuracy across −40°C to +85°C operating range. |
| Embedded Microcontroller Peripherals | Legacy Industrial PLC I/O Modules |
Use Scenario: Supplying 5V to UART transceivers, EEPROM, and GPIO expanders on microcontroller daughterboards. IC Role / Device Role / Timing Role: Point-of-load regulator decoupling digital noise from shared 12V backplane. Use Value: Dual GND pins (1 & 4) lower ground impedance, reducing crosstalk between digital and analog domains. |
Use Scenario: Replacing aging 7805 regulators in retrofit I/O modules where space-constrained SOIC-8 fits existing footprints. IC Role / Device Role / Timing Role: Drop-in replacement for obsolete TO-220 or DIP-8 linear regulators in maintenance-restricted equipment. Use Value: Identical 5V output and pin-compatible SOIC-8 footprint (with NC handling) enables direct PCB-level upgrade without redesign. |
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 |
|---|---|---|---|
| LM78L05ACM/NOPB | SOIC-8, ±4% output accuracy, 1.7V dropout, 65°C/W θJA, no NC pins | Lacks dual-GND and NC terminals; higher thermal resistance limits sustained 100mA operation on minimal copper | Preferred when board layout lacks thermal relief pads and NC routing is undesirable |
| MC78L05ABDR2G | SOIC-8, ±5% accuracy, 1.7V dropout, 62°C/W θJA, no NC pins, 2.5mA quiescent current | Lower IQ improves battery life but lacks safe-area compensation and thermal foldback behavior of AS78L05MTR-E1 | Chosen for ultra-low-power standby modes where thermal robustness is secondary to IQ |
Compared with LM78L05ACM/NOPB and MC78L05ABDR2G, AS78L05MTR-E1 uniquely combines dual-GND thermal enhancement, NC-based noise isolation, and safe-area protected pass transistor-making it optimal for compact, thermally constrained, or noise-sensitive 5V regulation tasks.
Availability
AS78L05MTR-E1 is available at Aetrix Electronics and suitable for consumer remote controls, industrial sensor nodes, and embedded microcontroller peripheral power supplies requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle continuity.
Supply support for AS78L05MTR-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 consumer markets.
The AS78LXX series was designed specifically for cost-sensitive, space-constrained local regulation in on-card and distributed power architectures-emphasizing integration, thermal resilience, and drop-in replaceability for legacy linear regulator designs.
FAQ
What is the maximum input voltage for AS78L05MTR-E1?
The absolute maximum input voltage is 36V, but the recommended operating range is 7–20V for AS78L05 variants. Exceeding 20V increases power dissipation beyond the 750mW rating and risks thermal shutdown, especially at ambient temperatures above 70°C or without adequate PCB copper pour.
Can AS78L05MTR-E1 replace a standard 7805 in SOIC-8 footprint?
No-it is not a pin-for-pin replacement for generic SOIC-8 7805s. AS78L05MTR-E1 has NC pins (2 and 3) and dual GND (pins 1 and 4), whereas most 7805 SOIC-8 parts use pins 1 (INPUT), 2 (GND), 3 (OUTPUT). PCB layout must accommodate the unique pin assignment to avoid misconnection.
Does AS78L05MTR-E1 require input and output capacitors?
Yes: a minimum 0.33µF ceramic capacitor at the INPUT pin and 0.1µF ceramic capacitor at the OUTPUT pin are mandatory for stability and noise suppression. The datasheet specifies these values under all operating conditions, and omitting them may cause oscillation or poor transient response.
Is AS78L05MTR-E1 suitable for automotive applications?
No-it is rated for −40°C to +125°C junction temperature but is not AEC-Q200 qualified. Diodes Incorporated does not specify automotive-grade qualification, stress testing, or PPAP documentation for this part. For automotive use, consider the AEC-Q100 qualified AP7361 series or similar qualified LDOs.
AS78L05MTR-E1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.8V @ 100mA (Typ)
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 5.5 mA
- Current - Supply (Max):
- -
- PSRR:
- 62dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AS78L05MTR-E1 FAQ
1.How can I place an order for AS78L05MTR-E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AS78L05MTR-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 AS78L05MTR-E1 reliable?
The price and inventory of AS78L05MTR-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AS78L05MTR-E1 is usually 5 days.
3.What payment methods are accepted for AS78L05MTR-E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AS78L05MTR-E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AS78L05MTR-E1?
AS78L05MTR-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AS78L05MTR-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 AS78L05MTR-E1?
For technical support, including AS78L05MTR-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AS78L05MTR-E1 requirements.
6.How does Aetrix verify that AS78L05MTR-E1 is sourced from the original manufacturer or authorized distributors?
All AS78L05MTR-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 AS78L05MTR-E1 meets industry standards.
7.What is the process for return or replacement of AS78L05MTR-E1?
All AS78L05MTR-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AS78L05MTR-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 AS78L05MTR-E1 part is unused and in its original packaging.
Return procedure for AS78L05MTR-E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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