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Diodes Incorporated AZ78L09ZTR-G1
- Part No.:
- AZ78L09ZTR-G1
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
AZ78L09ZTR-G1.pdf
- Description:
- IC REG LINEAR 9V 100MA TO92
- Quantity:
- Payment:
- Shipping:
Inventory:1,408
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Product details
Overview
AZ78L09ZTR-G1 from BCD Semiconductor Manufacturing Limited is a fixed-output +9V, 100mA three-terminal positive linear regulator in TO-92 (ammo packing) package. It features ±5% output voltage tolerance over –40°C to +125°C, internal short-circuit current limiting, and thermal shutdown protection. Designed for local on-card regulation, it replaces Zener/resistor networks in microprocessor I/O power supplies and post-regulation stages of switching supplies.
For engineers reviewing the AZ78L09ZTR-G1 datasheet, AZ78L09ZTR-G1 pinout, AZ78L09ZTR-G1 application, or AZ78L09ZTR-G1 equivalent, key selection criteria include dropout voltage (1.6 V), quiescent current (3–5 mA), ripple rejection (38–44 dB at 120 Hz), thermal resistance (81 °C/W), and input voltage range (12–18 V for stable 9 V output).
Technical Context
The AZ78L09ZTR-G1 implements a monolithic series-pass linear regulator architecture with built-in bandgap reference, error amplifier, and pass transistor. Its functional block diagram shows direct input-to-output path with ground-referenced feedback, requiring no external compensation components.
Thermal shutdown activates when junction temperature exceeds safe limits due to insufficient heatsinking or excessive power dissipation; current limiting caps peak output at 150 mA. The device operates without external capacitors but recommends 0.33 µF input and 0.1 µF output bypassing for transient stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +9.0 V ±5% (8.55–9.45 V over full temperature and load range) |
| Max Output Current | 100 mA continuous (150 mA peak, internally limited) |
| Dropout Voltage | 1.6 V (minimum headroom required between VIN and VOUT) |
| Input Voltage Range | 12–18 V (minimum 10.7 V to maintain regulation) |
| Quiescent Current | 3–5 mA (low bias draw improves efficiency in battery-sensitive designs) |
| Ripple Rejection | 38–44 dB at 120 Hz (suppresses switching supply noise in hybrid power architectures) |
| Thermal Resistance θJC | 81 °C/W (TO-92 package; dictates heatsink requirement for >300 mW dissipation) |
Pinout & Package
Package: TO-92 (ammo packing), 3-pin plastic through-hole package with standard lead spacing and 12.5 mm body height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | INPUT | Unregulated DC input; must be ≥10.7 V and ≤20 V for safe operation |
| 2 | OUTPUT | Regulated +9 V output; requires 0.1 µF ceramic capacitor for stability |
| 3 | GND | Ground reference for both input and output; low-impedance return path critical for noise control |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Self-contained regulation eliminates need for external feedback resistors or compensation networks |
| Internal thermal shutdown | Automatically disables output when junction temperature exceeds safe limit, preventing permanent damage |
| Short-circuit current limiting | Clamps output current to ≤150 mA under fault conditions, protecting upstream circuitry |
| Low output impedance | Two orders-of-magnitude improvement vs. Zener/resistor solutions, enabling tighter load regulation |
| Green RoHS-compliant packaging | "G1" suffix indicates halogen-free, lead-free, and green material set per JEDEC standards |
Applications
| Microprocessor I/O Power Supply | Post-Regulation for Switching Supply |
|---|---|
Use Scenario: Providing clean, low-noise +9 V rail to FPGA I/O banks or MCU peripheral interfaces where LDO rejection of upstream SMPS ripple is critical. IC Role / Device Role / Timing Role: Local point-of-load regulator delivering stable voltage independent of main system rail fluctuations. Use Value: 44 dB ripple rejection at 120 Hz reduces switching noise coupling into sensitive digital I/O, improving signal integrity and timing margin. |
Use Scenario: Final-stage regulation after a 12 V buck converter to meet tight tolerance requirements for analog sensor front-ends. IC Role / Device Role / Timing Role: Precision voltage clamp ensuring consistent reference levels for ADCs and op-amps. Use Value: ±5% output tolerance over –40°C to +125°C maintains accuracy across industrial temperature ranges without calibration. |
| HiFi Audio Power Rail | Instrumentation Signal Conditioning |
Use Scenario: Biasing op-amp rails in portable audio amplifiers where low quiescent current extends battery life. IC Role / Device Role / Timing Role: Low-noise analog supply generator with 70 µV RMS output noise (10 Hz–100 kHz). Use Value: 70 µV noise floor preserves dynamic range in 16-bit audio paths; 3–5 mA IQ enables >200-hour operation on 1 Ah battery. |
Use Scenario: Powering precision instrumentation amplifiers in data acquisition modules requiring stable excitation voltage. IC Role / Device Role / Timing Role: Reference-grade local regulator minimizing drift-induced measurement error. Use Value: 0.9 mV/°C temperature coefficient ensures <±10 mV drift over 0–70°C ambient, supporting 0.1% measurement accuracy. |
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 |
|---|---|---|---|
| LM78L09ACZ | Same 9 V output, but wider ±10% tolerance (vs. ±5%), higher quiescent current (5.5 mA typ), TO-92 package | Lacks green/RoHS-compliant marking; not qualified for extended temperature range (–40°C to +125°C) | Use only in cost-sensitive commercial applications where tighter tolerance and industrial temp grade are unnecessary |
| MC78L09ACP | Identical electrical specs but obsolete packaging (plastic DIP); no green/RoHS compliance; discontinued by ON Semi | No tape-and-reel (TR) option; incompatible with modern SMT assembly lines despite through-hole form factor | Avoid for new designs due to obsolescence risk and lack of supply chain support |
Compared with LM78L09ACZ and MC78L09ACP, the AZ78L09ZTR-G1 offers tighter output tolerance, lower quiescent current, guaranteed industrial temperature operation, and RoHS/green compliance - making it suitable for long-lifecycle embedded and industrial systems requiring traceable, sustainable sourcing.
Availability
AZ78L09ZTR-G1 is available at Aetrix Electronics and suitable for microprocessor I/O power supplies, post-regulation of switching supplies, HiFi audio rails, and instrumentation signal conditioning requiring stable component supply, green compliance, and industrial temperature support.
Supply support for AZ78L09ZTR-G1 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
BCD Semiconductor Manufacturing Limited is a Shanghai-based analog IC foundry and fabless designer specializing in high-reliability power management and interface products for industrial and automotive markets.
The AZ78LXX series was developed as a drop-in replacement for legacy 78Lxx regulators, emphasizing improved thermal robustness, tighter tolerances, and green packaging - targeting cost-sensitive yet reliability-critical embedded power applications.
FAQ
What is the minimum input voltage required for the AZ78L09ZTR-G1 to maintain regulation?
The minimum input voltage is 10.7 V under typical operating conditions (IOUT = 40 mA, TJ = 25°C). This value accounts for the 1.6 V dropout voltage plus margin for line regulation. Below 10.7 V, output voltage drops linearly with input, losing regulation capability and increasing sensitivity to input ripple.
Can the AZ78L09ZTR-G1 operate without input or output capacitors?
It can function without external capacitors but is not recommended. The datasheet specifies 0.33 µF input and 0.1 µF output ceramic capacitors for stable transient response and optimal ripple rejection. Omitting them risks oscillation under dynamic loads and degrades PSRR by up to 15 dB at 120 Hz.
How does thermal shutdown behave during sustained overload?
When junction temperature exceeds ~150°C due to excessive power dissipation (e.g., VIN = 18 V, IOUT = 100 mA, no heatsink), the thermal shutdown circuit disables the pass transistor. Output drops to near zero until junction cools below ~135°C, then auto-resumes - a cycle that prevents permanent damage but causes intermittent operation.
Is the AZ78L09ZTR-G1 pin-compatible with legacy 78L09 devices?
Yes - it uses identical TO-92 pinout (Pin 1 = INPUT, Pin 2 = OUTPUT, Pin 3 = GND) and matches mechanical dimensions. Electrical compatibility is confirmed: same 9 V nominal output, 100 mA rating, and dropout voltage. The "G1" suffix denotes green packaging but does not affect pin or functional behavior.
AZ78L09ZTR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 9V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.6V @ 40mA (Typ)
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 5 mA
- Current - Supply (Max):
- -
- PSRR:
- 44dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92
AZ78L09ZTR-G1 FAQ
1.How can I place an order for AZ78L09ZTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ78L09ZTR-G1 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 AZ78L09ZTR-G1 reliable?
The price and inventory of AZ78L09ZTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ78L09ZTR-G1 is usually 5 days.
3.What payment methods are accepted for AZ78L09ZTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ78L09ZTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ78L09ZTR-G1?
AZ78L09ZTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ78L09ZTR-G1 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 AZ78L09ZTR-G1?
For technical support, including AZ78L09ZTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ78L09ZTR-G1 requirements.
6.How does Aetrix verify that AZ78L09ZTR-G1 is sourced from the original manufacturer or authorized distributors?
All AZ78L09ZTR-G1 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 AZ78L09ZTR-G1 meets industry standards.
7.What is the process for return or replacement of AZ78L09ZTR-G1?
All AZ78L09ZTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ78L09ZTR-G1, 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 AZ78L09ZTR-G1 part is unused and in its original packaging.
Return procedure for AZ78L09ZTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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