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Diodes Incorporated ZXTR2012Z-13
- Part No.:
- ZXTR2012Z-13
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-243AA
- Datasheet:
-
ZXTR2012Z-13.pdf
- Description:
- IC REG LINEAR 12V 47MA SOT89
- Quantity:
- Payment:
- Shipping:
Inventory:3,408
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Product details
Overview
ZXTR2012Z-13 from Diodes Incorporated is a monolithic high-voltage linear regulator transistor integrating an emitter-follower transistor, Zener reference, and 150kΩ current-limiting resistor in a single SOT89 package. It delivers a regulated 12V ±10% output at up to 30mA across 15–100V input, with 240mV line regulation and 45dB PSRR, targeting startup bias supply in DC-DC converters.
For engineers reviewing the ZXTR2012Z-13 datasheet, ZXTR2012Z-13 pinout, ZXTR2012Z-13 application, or ZXTR2012Z-13 equivalent, key selection criteria include input voltage range (15–100V), output regulation tolerance (±10%), thermal resistance (RθJA = 59°C/W on 50mm×50mm copper), quiescent current (240–590µA), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
The ZXTR2012Z operates as a series linear regulator using an emitter-follower topology, where the integrated Zener diode sets the base voltage and the 150kΩ resistor biases the transistor to maintain regulation. Its internal architecture eliminates external components required by discrete solutions.
It functions only when VIN ≥15V; below that, VOUT follows VIN minus ~1.5V drop. Output stability requires ≥10µA load and 10µF output capacitance, while input transient immunity is supported by 1µF bypass capacitance at VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 12V ±10% - maintains stable bias rail under varying load and temperature for downstream ICs. |
| Input Voltage Range | 15V to 100V - enables direct connection to PoE, telecom, or industrial HV rails without pre-regulation. |
| Max Continuous Output Current | 47mA @ VIN=48V - sufficient for gate drivers, optocouplers, or controller IC startup circuits. |
| Line Regulation | 240mV (typ) - ensures <2% output deviation across full input range, critical for precision biasing. |
| Quiescent Current | 240–590µA - low standby draw preserves efficiency in always-on auxiliary supplies. |
| Thermal Resistance RθJA | 59°C/W (on 50mm×50mm 1oz Cu) - defines power derating slope above 25°C ambient for safe continuous operation. |
| PSRR | 45dB @ 100Hz - suppresses ripple from noisy HV input sources before reaching sensitive analog circuitry. |
Pinout & Package
Package: SOT89 - surface-mount, thermally enhanced plastic package with exposed VIN pad for improved heat dissipation; 0.052g weight; RoHS-compliant matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Supply | High-voltage input terminal (−0.3V to 100V); must be decoupled with ≥1µF capacitor to GND. |
| GND | Power Ground | Reference node for all voltages; connects to system ground plane; ties internal Zener cathode. |
| VOUT | Voltage Output | Regulated 12V output; requires ≥10µF capacitor to GND and minimum 10µA load to sustain regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic integration | Replaces 3 discrete parts (transistor + Zener + resistor), reducing BOM count and PCB area by >60% vs. discrete solution. |
| Emitter-follower regulation | Provides low-dropout behavior (VOUT ≈ VIN − VBE) with inherent short-circuit protection via current-limited base drive. |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and body electronics requiring high-reliability bias supplies. |
| 150kΩ internal bias resistor | Fixes quiescent current at ~300µA at 48V, eliminating external bias network and improving design reproducibility. |
| Green compound packaging | Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) meets strict environmental compliance for global OEM programs. |
Applications
| DC-DC Converter Startup | Power over Ethernet (PoE) |
|---|---|
Use Scenario: Provides initial gate drive or controller bias during cold-start of isolated flyback or forward converters before main output regulation engages. IC Role / Device Role / Timing Role: High-voltage linear regulator supplying 12V to PWM controller ICs (e.g., UC384x, TL494) prior to transformer feedback loop activation. Use Value: Enables self-powered startup without auxiliary winding or external HV resistor divider, reducing component count and improving start-up reliability at 48V PoE input. |
Use Scenario: Generates stable 12V bias for PD-side interface ICs (e.g., TPS2375, MAX5980) in IEEE 802.3af/at powered devices. IC Role / Device Role / Timing Role: Primary auxiliary supply regulating from PoE midspan or PSE voltage (37–57V) to power detection, classification, and DC-DC control circuitry. Use Value: Maintains regulation across full PoE input range with <240mV line variation, ensuring robust Class 3/4 detection and hot-swap sequencing integrity. |
| Telecom Line Card Bias | Industrial Sensor Interface |
Use Scenario: Supplies regulated 12V to op-amps, ADCs, and isolation amplifiers on telecom line cards operating from −48V or +48V distributed supplies. IC Role / Device Role / Timing Role: Negative-to-positive conversion stage (with external inverter) or positive HV rail regulator for analog front-end signal conditioning blocks. Use Value: Delivers clean, low-noise 12V rail with 45dB PSRR, minimizing supply-induced errors in 16-bit sensor signal chains and line driver stages. |
Use Scenario: Powers isolated RS-485 transceivers (e.g., ADM2483), digital isolators (e.g., ISO7741), and microcontroller peripherals in factory automation I/O modules. IC Role / Device Role / Timing Role: Auxiliary voltage source converting 24V or 48V field bus voltage to 12V for isolated communication interfaces and logic-level translation. Use Value: Supports operation up to +125°C junction temperature with 59°C/W thermal resistance, enabling reliable deployment in uncooled control cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTR2008Z-13 | 8V nominal output (±10%), same SOT89 package and 150kΩ bias resistor; lower dropout but reduced headroom for 12V systems. | Suitable for 5V/8V logic biasing; not interchangeable where 12V is required for gate drive or op-amp rails. | Select only if target system uses 8V logic or lower-voltage controllers and requires identical thermal performance. |
| TL783CP | Adjustable output (1.25–125V) via external resistors; higher IQ (~1.5mA); TO-220 package; no integrated Zener or bias resistor. | Requires 3 external components; supports wider output range but increases layout complexity and thermal footprint. | Choose when programmable output or >30mA load is needed; avoid if space-constrained or seeking plug-and-play replacement. |
Compared with ZXTR2012Z-13, ZXTR2008Z-13 trades output voltage for identical integration and thermal behavior, while TL783CP offers flexibility at the cost of board area, component count, and quiescent power-making ZXTR2012Z optimal for fixed 12V, space-sensitive, low-IQ applications.
Availability
ZXTR2012Z-13 is available at Aetrix Electronics and suitable for Power over Ethernet (PoE) interface modules, telecom line card auxiliary supplies, and industrial DC-DC converter startup circuits requiring stable component supply, long-term lifecycle support, and AEC-Q101 reliability assurance.
Supply support for ZXTR2012Z-13 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, energy-efficient components for automotive, industrial, and communications markets.
ZXTR2012Z belongs to Diodes' high-voltage linear regulator transistor family, designed specifically to replace multi-component bias networks in HV auxiliary power applications where space, reliability, and thermal performance are critical.
FAQ
What is the minimum input voltage required for regulation?
The ZXTR2012Z-13 requires VIN ≥15V to maintain regulated 12V output. Below 15V, VOUT drops approximately linearly at VIN − 1.5V. This threshold is defined by the internal Zener voltage and transistor VBE, and is verified across −40°C to +125°C junction temperature range per DS36330 Rev. 2-2.
Can ZXTR2012Z-13 drive a 30mA load continuously?
Yes, but only at VIN ≤48V and TA ≤25°C with adequate PCB copper (50mm×50mm 1oz). At VIN=48V, max continuous IOUT is 47mA per absolute ratings; at VIN=100V, power dissipation limits usable IOUT to ~17mA due to PD=1.7W limit and RθJA=59°C/W derating.
Is an output capacitor mandatory?
Yes - a minimum 10µF ceramic or tantalum capacitor must be placed between VOUT and GND to ensure stability and transient response. Without it, the device exhibits oscillation and poor load regulation, as confirmed in Typical Application Circuit and Load Transient Response plots in DS36330.
Does ZXTR2012Z-13 support reverse polarity input?
No - VIN must remain ≥ −0.3V relative to GND. The device contains no reverse-polarity protection; applying negative voltage beyond −0.3V risks permanent damage to the integrated transistor and Zener, as specified in Absolute Maximum Ratings.
ZXTR2012Z-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 100V
- Voltage - Output (Min/Fixed):
- 12V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 47mA
- Current - Quiescent (Iq):
- 400 µA
- Current - Supply (Max):
- 900 µA
- PSRR:
- 45dB (100Hz)
- Control Features:
- -
- Protection Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
ZXTR2012Z-13 FAQ
1.How can I place an order for ZXTR2012Z-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXTR2012Z-13 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 ZXTR2012Z-13 reliable?
The price and inventory of ZXTR2012Z-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTR2012Z-13 is usually 5 days.
3.What payment methods are accepted for ZXTR2012Z-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTR2012Z-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXTR2012Z-13?
ZXTR2012Z-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXTR2012Z-13 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 ZXTR2012Z-13?
For technical support, including ZXTR2012Z-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTR2012Z-13 requirements.
6.How does Aetrix verify that ZXTR2012Z-13 is sourced from the original manufacturer or authorized distributors?
All ZXTR2012Z-13 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 ZXTR2012Z-13 meets industry standards.
7.What is the process for return or replacement of ZXTR2012Z-13?
All ZXTR2012Z-13 units undergo pre-shipment inspection (PSI). If there is an issue with ZXTR2012Z-13, 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 ZXTR2012Z-13 part is unused and in its original packaging.
Return procedure for ZXTR2012Z-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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