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Diodes Incorporated AS78L05ZTR-E1
- Part No.:
- AS78L05ZTR-E1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
AS78L05ZTR-E1.pdf
- Description:
- IC REG LINEAR 5V 100MA TO92
- Quantity:
- Payment:
- Shipping:
Inventory:99,563
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Product details
Overview
AS78L05ZTR-E1 from Diodes Incorporated is a 100mA fixed-output +5V positive voltage regulator in TO-92 (ammo pack) package, featuring internal current limiting, thermal shutdown, and safe-area compensation for robust local regulation. It delivers stable 5.0V ±5% output across –40°C to +125°C, supports input voltages up to 30V, and requires no external components for basic operation - commonly used in microprocessor power supplies and consumer electronics board-level regulation.
For engineers reviewing the AS78L05ZTR-E1 datasheet, AS78L05ZTR-E1 pinout, AS78L05ZTR-E1 application, or AS78L05ZTR-E1 equivalent, key selection criteria include dropout voltage (1.7V at 40mA), load regulation (10–60mV), PSRR (47–62dB at 120Hz), quiescent current (3–5.5mA), and thermal resistance (θJA = 180°C/W in TO-92).
Technical Context
The AS78L05ZTR-E1 implements a monolithic linear regulator architecture with built-in protection circuitry: short-circuit current limiting triggers at ~150mA, thermal shutdown activates above 150°C junction temperature, and safe-area compensation prevents secondary breakdown during overload. Its three-terminal configuration (Input, Ground, Output) enables direct replacement of legacy 78L05 variants without redesign.
It operates within a recommended input range of 7–20V for optimal line regulation (8–150mV), maintains output stability under 1–100mA load variation (load regulation 10–60mV), and achieves 40µV RMS output noise (10Hz–100kHz) with minimal external capacitance (0.1µF COUT recommended).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0V ±5% (4.75–5.25V over full –40°C to +125°C range) |
| Max Output Current | 100mA continuous (requires heatsinking beyond 750mW dissipation) |
| Dropout Voltage | 1.7V at 40mA load (defines minimum VIN = 6.7V for stable 5V output) |
| Line Regulation | 8–150mV (input change 7–20V affects output by ≤150mV) |
| Load Regulation | 10–60mV (output shifts ≤60mV when load varies 1–100mA) |
| PSRR | 47–62dB at 120Hz (attenuates ripple on input supply by >200×) |
| Quiescent Current | 3–5.5mA (low bias draw enables efficient light-load operation) |
Pinout & Package
AS78L05ZTR-E1 uses the TO-92 package (ammo packing), with standardized 3-pin configuration and JEDEC TO-92 outline dimensions (15.5mm length, 4.8mm width, 3.7mm height). Pin assignment follows industry-standard "Z" variant layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INPUT) | Unregulated DC Input | Accepts 7–30V DC; must be ≥ dropout + VOUT for regulation |
| 2 (GND) | Ground Reference | Common return path for input, output, and internal bias circuits |
| 3 (OUTPUT) | Regulated +5V Output | Delivers stable 5V to load; requires 0.1µF ceramic capacitor for stability |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated pass transistor, error amplifier, and reference enable single-chip 5V regulation |
| Internal thermal shutdown | Automatically disables output above 150°C junction temperature to prevent damage |
| Short-circuit current limiting | Clamps output current to ~150mA to protect device and upstream supply during fault |
| Safe-area compensation | Prevents secondary breakdown of output transistor under high-voltage/high-current stress |
| High PSRR at low frequency | 62dB rejection at 120Hz suppresses rectified AC ripple from unregulated wall adapters |
Applications
| Microprocessor Power Supply | Consumer Electronics Board |
|---|---|
|
Use Scenario: Providing clean 5V rail to 8-bit microcontrollers (e.g., PIC16F, ATmega328P) on compact PCBs with limited space. IC Role / Device Role / Timing Role: Primary local voltage regulator converting higher DC input (e.g., 9V battery or 12V adapter) to stable 5V logic supply. Use Value: Eliminates need for external feedback resistors or compensation networks - reduces BOM count and layout area while maintaining ±5% accuracy over industrial temperature range. |
Use Scenario: Powering LED drivers, audio amplifiers, and sensor interfaces in battery-powered portable devices (e.g., smart remotes, wireless speakers). IC Role / Device Role / Timing Role: Low-quiescent-current (3mA) LDO delivering regulated 5V to mixed-signal subsystems with intermittent load profiles. Use Value: Enables >1-year battery life in standby mode due to sub-5.5mA IQ, while sustaining 100mA peak loads during active operation without thermal derating. |
| Motherboard Local Regulation | Industrial Control I/O Module |
|
Use Scenario: Decoupling and local regulation for USB interface ICs, EEPROMs, and level shifters on PC motherboard daughter cards. IC Role / Device Role / Timing Role: Point-of-load regulator isolating noise-sensitive peripherals from noisy main 12V/5V rails. Use Value: 47dB PSRR at 120Hz and 40µV output noise ensure signal integrity for USB data lines and I²C buses operating near switching regulators. |
Use Scenario: Powering isolated digital I/O drivers and analog sensor front-ends in DIN-rail mounted PLC modules operating in harsh environments. IC Role / Device Role / Timing Role: Robust 5V supply with thermal shutdown and current limiting for field-side circuitry exposed to voltage transients and ambient temperatures up to +70°C. Use Value: Withstands 30V max input and survives repeated short-circuits - eliminates fuse replacement in sealed enclosures and extends field service intervals. |
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 |
|---|---|---|---|
| MC78L05ACZ (ON Semiconductor) | Same TO-92 package, ±4% output tolerance (tighter than AS78L05ZTR-E1's ±5%), higher IQ (5.5–8mA) | Suitable where tighter initial accuracy is prioritized over lowest quiescent current | Select when system calibration tolerances demand <±4% VOUT at 25°C, accepting higher idle power draw |
| LM78L05ACZ (Texas Instruments) | TO-92 package, ±4% output tolerance, lower PSRR (40dB @120Hz), no safe-area compensation | Lacks integrated safe-area protection; requires external current limiting for sustained overload | Choose only in cost-sensitive, non-safety-critical applications with well-controlled input transients and thermal environment |
Compared with MC78L05ACZ and LM78L05ACZ, AS78L05ZTR-E1 offers superior thermal robustness via safe-area compensation and better ripple rejection (62dB vs. 40dB), making it preferred for industrial and automotive-adjacent designs where reliability under transient stress is critical - despite its slightly wider output tolerance.
Availability
AS78L05ZTR-E1 is available at Aetrix Electronics and suitable for microprocessor power supplies, consumer electronics boards, and industrial control I/O modules requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.
Supply support for AS78L05ZTR-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 belongs to Diodes' legacy linear regulator product line, designed specifically for cost-effective, space-constrained local regulation in applications where simplicity, ruggedness, and wide temperature operation outweigh ultra-low noise or ultra-high efficiency requirements.
FAQ
What is the maximum input voltage for AS78L05ZTR-E1?
The absolute maximum input voltage is 36V, but the recommended operating range is 7–30V for the AS78L05 variant. Exceeding 30V risks violating safe operating area limits and may trigger thermal shutdown prematurely, especially at high ambient temperatures or without adequate heatsinking.
Does AS78L05ZTR-E1 require input and output capacitors?
Yes - a 0.33µF ceramic capacitor on the input and a 0.1µF ceramic capacitor on the output are specified in the datasheet for stability and transient response. Omitting the output capacitor can cause oscillation or poor load regulation, particularly under dynamic current steps.
Can AS78L05ZTR-E1 replace older 78L05 variants in existing designs?
Yes - it is pin-compatible with standard 78L05 TO-92 devices (Input-Ground-Output pinout), shares identical electrical specifications (±5% VOUT, 100mA rating), and adds enhanced thermal and short-circuit protection. No layout or schematic changes are needed for drop-in replacement.
What does the "TR-E1" suffix indicate in AS78L05ZTR-E1?
"TR" denotes tape-and-reel packaging (ammo pack format for TO-92), and "E1" indicates lead-free, RoHS-compliant construction per Diodes Incorporated's standard. This part meets JEDEC J-STD-020 moisture sensitivity level 1 and is compatible with standard reflow soldering profiles.
AS78L05ZTR-E1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Cut Tape (CT)
- 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:
- Through Hole
- Supplier Device Package:
- TO-92
AS78L05ZTR-E1 FAQ
1.How can I place an order for AS78L05ZTR-E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AS78L05ZTR-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 AS78L05ZTR-E1 reliable?
The price and inventory of AS78L05ZTR-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AS78L05ZTR-E1 is usually 5 days.
3.What payment methods are accepted for AS78L05ZTR-E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AS78L05ZTR-E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AS78L05ZTR-E1?
AS78L05ZTR-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AS78L05ZTR-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 AS78L05ZTR-E1?
For technical support, including AS78L05ZTR-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AS78L05ZTR-E1 requirements.
6.How does Aetrix verify that AS78L05ZTR-E1 is sourced from the original manufacturer or authorized distributors?
All AS78L05ZTR-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 AS78L05ZTR-E1 meets industry standards.
7.What is the process for return or replacement of AS78L05ZTR-E1?
All AS78L05ZTR-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AS78L05ZTR-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 AS78L05ZTR-E1 part is unused and in its original packaging.
Return procedure for AS78L05ZTR-E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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