My Inquiry
My Account
Diodes Incorporated AS78L05CZTR-E1
- Part No.:
- AS78L05CZTR-E1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
AS78L05CZTR-E1.pdf
- Description:
- IC REG LINEAR 5V 100MA TO92
- Quantity:
- Payment:
- Shipping:
Inventory:1,839
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AS78L05CZTR-E1 from Diodes Incorporated is a fixed-output +5.0 V, 100 mA positive voltage regulator in TO-92 (ammo pack) package with ±5% output voltage accuracy over −40 °C to +125 °C, internal thermal shutdown and short-circuit protection, used for local regulation on microprocessor power supplies and motherboard subsystems.
For engineers reviewing the AS78L05CZTR-E1 datasheet, AS78L05CZTR-E1 pinout, AS78L05CZTR-E1 application, or AS78L05CZTR-E1 equivalent, key selection criteria include dropout voltage (1.7 V at 40 mA), PSRR (47–62 dB at 120 Hz), output noise (40 µV RMS, 10 Hz–100 kHz), and thermal resistance (θJA = 180 °C/W in TO-92).
Technical Context
This linear regulator employs a PNP pass transistor with built-in safe-area compensation, enabling stable operation under transient load conditions without external compensation components. Its internal current limiting and thermal foldback prevent damage during sustained overload or elevated ambient temperatures.
The device operates across an input voltage range of 7–20 V for nominal 5 V output, maintaining regulation up to 100 mA when adequately heatsinked. It requires only two external capacitors (0.33 µF input, 0.1 µF output) and delivers low-noise, high-PSRR performance suitable for analog-sensitive digital subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal, ±5% tolerance over full temperature range - ensures compatibility with 5 V logic and analog circuitry without post-regulation trimming. |
| Max Output Current | 100 mA continuous - sufficient for powering small microcontrollers, sensors, or peripheral ICs in space-constrained designs. |
| Dropout Voltage | 1.7 V at 40 mA - enables operation from 7 V input while maintaining regulation, reducing minimum supply headroom requirement. |
| PSRR | 47–62 dB at 120 Hz - suppresses ripple from switching power supplies or noisy DC-DC converters feeding the regulator input. |
| Output Noise | 40 µV RMS (10 Hz–100 kHz) - supports noise-sensitive analog functions such as ADC references or op-amp biasing. |
| Thermal Resistance θJA | 180 °C/W (TO-92) - defines maximum power dissipation (750 mW absolute max) and junction temperature rise under natural convection. |
| Line Regulation | 8–150 mV over 7–20 V input - limits output variation due to upstream supply fluctuations, critical for stable system-level voltage rails. |
Pinout & Package
AS78L05CZTR-E1 is housed in a TO-92 package (ammo packing), with three leads arranged in standard Z-package configuration: Pin 1 = INPUT, Pin 2 = GND, Pin 3 = OUTPUT. The package is through-hole mountable and RoHS-compliant (lead-free "E1" suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (INPUT) | Unregulated DC input | Accepts 7–20 V DC; must be decoupled with ≥0.33 µF capacitor to ensure stability and reduce high-frequency noise coupling. |
| Pin 2 (GND) | Ground reference | Common return path for input and output circuits; requires low-impedance connection to minimize ground bounce and PSRR degradation. |
| Pin 3 (OUTPUT) | Regulated +5.0 V output | Delivers up to 100 mA; requires ≥0.1 µF ceramic output capacitor for transient response and noise filtering per datasheet recommendation. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated pass element, error amplifier, and feedback network eliminate need for external resistors or compensation capacitors. |
| Internal short-circuit current limiting | Self-limiting output current prevents destructive fault currents during output shorts, enabling robust field operation without fuse or external protection. |
| Thermal shutdown protection | Automatically disables output when junction temperature exceeds ~150 °C, protecting silicon integrity during sustained overload or poor heatsinking. |
| Safe-area compensated pass transistor | Prevents second breakdown under simultaneous high voltage and current stress, ensuring reliable operation across line and load transients. |
Applications
| Microcontroller Power Supply | Motherboard Local Regulation |
|---|---|
|
Use Scenario: Providing clean 5 V rail to 8-bit/32-bit microcontrollers (e.g., PIC, STM32, ESP32) in embedded control modules. IC Role / Device Role / Timing Role: Primary local LDO supplying core logic and I/O voltage, decoupling main system rail from MCU dynamic current demands. Use Value: Low quiescent current (3–5.5 mA) extends battery life in portable MCU applications; 40 µV noise avoids ADC quantization errors. |
Use Scenario: On-board 5 V regulation for USB interface controllers, BIOS chips, or fan controllers on PC motherboards. IC Role / Device Role / Timing Role: Secondary point-of-load regulator isolating sensitive subsystems from shared 5 VSB or ATX +5 V rail noise. Use Value: 62 dB PSRR at 120 Hz rejects ripple from ATX PSU transformers; TO-92 footprint allows compact placement near load. |
| Consumer Audio Front-End | Industrial Sensor Interface |
|
Use Scenario: Powering op-amps, DACs, or audio codecs in portable speakers, headphones, or voice assistants. IC Role / Device Role / Timing Role: Low-noise analog supply rail generator, separate from digital 5 V domains to prevent crosstalk. Use Value: 40 µV RMS output noise meets SNR requirements for 16-bit audio paths; ±5% accuracy ensures consistent gain calibration. |
Use Scenario: Supplying precision analog sensors (e.g., RTDs, strain gauges, Hall-effect ICs) in factory automation nodes. IC Role / Device Role / Timing Role: Stable excitation/reference voltage source for ratiometric sensor measurements and signal conditioning stages. Use Value: 84 ppm/°C tempco minimizes drift-induced measurement error; thermal shutdown protects against enclosure overheating failures. |
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 |
|---|---|---|---|
| LM78L05ACZ | Same TO-92 package, but ±4% output tolerance (tighter), higher IQ (5.5–7.5 mA), lower PSRR (40 dB typical at 120 Hz) | Preferred where tighter initial accuracy matters more than PSRR or noise; less suitable for noisy switcher-fed inputs | Select LM78L05ACZ if ±4% output tolerance is mandatory and input ripple is minimal. |
| MC78L05ACZ | Identical electrical specs to AS78L05CZTR-E1 but rated for −40 °C to +105 °C (not 125 °C); same TO-92 footprint and pinout | Limited to commercial/industrial ambient ranges; not qualified for extended-temperature automotive or industrial edge nodes | Choose MC78L05ACZ only if operating ambient stays ≤105 °C and full 125 °C rating is unnecessary. |
Compared with LM78L05ACZ and MC78L05ACZ, AS78L05CZTR-E1 offers superior thermal robustness (125 °C TJ rating), better PSRR, and lower output noise-making it optimal for thermally demanding or noise-sensitive 5 V local regulation tasks.
Availability
AS78L05CZTR-E1 is available at Aetrix Electronics and suitable for microcontroller power supplies, motherboard local regulation, consumer audio front-ends, and industrial sensor interfaces requiring stable component supply with RoHS-compliant packaging and traceable sourcing.
Supply support for AS78L05CZTR-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, cost-optimized power management and signal integrity solutions for industrial, computing, and consumer markets.
The AS78LXX series was designed specifically for low-cost, high-volume local regulation in space-constrained PCBs-emphasizing simplicity (no external components), ruggedness (thermal/short-circuit protection), and broad temperature operation (−40 °C to +125 °C).
FAQ
What is the maximum input voltage for AS78L05CZTR-E1?
The absolute maximum input voltage is 36 V, but the recommended operating range is 7–20 V for stable 5 V output regulation. Exceeding 20 V increases power dissipation and thermal stress without functional benefit, and may trigger thermal shutdown under load.
Does AS78L05CZTR-E1 require input and output capacitors?
Yes: a minimum 0.33 µF ceramic or tantalum capacitor on the INPUT pin and 0.1 µF ceramic capacitor on the OUTPUT pin are required for stability, transient response, and noise suppression. Omitting either risks oscillation or degraded PSRR and load regulation.
Can AS78L05CZTR-E1 be used in surface-mount designs?
No-AS78L05CZTR-E1 uses the TO-92 through-hole package (ammo pack). For SMT alternatives, consider AS78L05RTR-E1 (SOT-89) or AS78L05MTR-E1 (SOIC-8), which share identical electrical specs but differ in thermal performance and board assembly method.
How does the "C" in AS78L05CZTR-E1 affect performance?
The "C" denotes high-precision grade: output voltage is specified as 5.0–5.1 V (vs. 4.75–5.25 V for standard "AS78L05ZTR-E1"), improving initial accuracy for applications requiring tighter voltage margins without post-production calibration.
AS78L05CZTR-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
AS78L05CZTR-E1 FAQ
1.How can I place an order for AS78L05CZTR-E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AS78L05CZTR-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 AS78L05CZTR-E1 reliable?
The price and inventory of AS78L05CZTR-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AS78L05CZTR-E1 is usually 5 days.
3.What payment methods are accepted for AS78L05CZTR-E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AS78L05CZTR-E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AS78L05CZTR-E1?
AS78L05CZTR-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AS78L05CZTR-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 AS78L05CZTR-E1?
For technical support, including AS78L05CZTR-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AS78L05CZTR-E1 requirements.
6.How does Aetrix verify that AS78L05CZTR-E1 is sourced from the original manufacturer or authorized distributors?
All AS78L05CZTR-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 AS78L05CZTR-E1 meets industry standards.
7.What is the process for return or replacement of AS78L05CZTR-E1?
All AS78L05CZTR-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AS78L05CZTR-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 AS78L05CZTR-E1 part is unused and in its original packaging.
Return procedure for AS78L05CZTR-E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AS78L05CZTR-E1 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
