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Diodes Incorporated ZXTR2105FQ-7
- Part No.:
- ZXTR2105FQ-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXTR2105FQ-7.pdf
- Description:
- IC REG LINEAR 5V 89MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:23,575
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Product details
Overview
ZXTR2105FQ from Diodes Incorporated is a monolithic 5V ±5% linear regulator transistor in SOT23, integrating an emitter-follower transistor, zener reference, and bias resistor. It delivers 15mA regulated output across 7–60V input, supports automotive AEC-Q101 qualification, and replaces discrete 3-component regulator solutions in space-constrained 12V/24V-to-5V rails.
For engineers reviewing the ZXTR2105FQ datasheet, ZXTR2105FQ pinout, ZXTR2105FQ application, or ZXTR2105FQ equivalent, key selection criteria include input voltage range (7–60V), output accuracy (±5%), thermal resistance (200°C/W on 25mm² copper), quiescent current (450–6700µA), and AEC-Q101 qualification for automotive power rail regulation.
Technical Context
This device implements a series linear regulator using an integrated emitter-follower stage with internal zener-based voltage reference and fixed bias network. Regulation occurs via base-emitter voltage drop tracking of the internal zener, enabling stable 5V output without external feedback components.
It operates over -65°C to +150°C junction temperature, supports up to 320mA continuous output current at low VIN, and maintains regulation only when VIN ≥7V - below that, VOUT follows VIN–1V. ESD robustness includes 4kV HBM and 400V MM ratings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0V ±5% - ensures compatible logic-level supply for MCU peripherals and sensors in automotive 5V domains. |
| Input Voltage Range | 7V to 60V - enables direct regulation from 12V/24V/48V vehicle batteries without pre-regulation. |
| Output Current | 15mA nominal / 89mA max @VIN=12V - sufficient for low-power microcontrollers, CAN transceivers, and sensor biasing. |
| Line Regulation | 33–700mV - quantifies output drift across input voltage sweep; critical for stable operation during battery transients. |
| Quiescent Current | 450–6700µA - increases with VIN; impacts standby power in always-on automotive modules. |
| Thermal Resistance θJA | 200°C/W - defines maximum power dissipation (625mW) on 25mm×25mm 1oz copper PCB. |
| PSRR | 46dB @100Hz - suppresses low-frequency ripple from alternator or switching supply noise. |
Pinout & Package
Package: SOT23 - surface-mount plastic package (2.4mm × 1.3mm × 1.0mm), RoHS-compliant, halogen-free, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Supply | Accepts -0.3V to 60V; must be ≥7V for regulation; requires 1µF bypass capacitor to GND. |
| GND | Power Ground | Reference node for all voltages; must connect directly to system ground plane with low impedance. |
| VOUT | Voltage Output | Delivers regulated 5V; requires 10µF output capacitor and minimum 10µA load to maintain regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic Integration | Replaces discrete transistor + zener + resistor solution, reducing BOM count and layout area by >50%. |
| AEC-Q101 Qualification | Validated for automotive underhood environments including temperature cycling, humidity, and mechanical shock. |
| Wide Input Range | Operates across full automotive battery range (cold crank to load dump), eliminating need for external pre-regulator. |
| Lead-Free & Green | Fully RoHS-compliant with <900ppm Br/Cl and <1000ppm Sb; meets global environmental compliance requirements. |
| ESD Robustness | 4kV HBM rating enables handling in standard assembly lines without special ESD controls. |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Interface |
|---|---|
Use Scenario: Regulating 12V battery supply to 5V for microcontroller I/O, LIN transceivers, and LED drivers in door modules. IC Role / Device Role / Timing Role: Primary 5V linear regulator providing clean, low-noise power for mixed-signal peripherals. Use Value: Eliminates need for external feedback resistors and improves transient response vs. discrete zener solutions. | Use Scenario: Powering analog front-end circuitry (op-amps, ADC references) in 24V-powered industrial pressure sensors. IC Role / Device Role / Timing Role: Fixed-output voltage regulator delivering stable 5V from unregulated 24V field wiring. Use Value: Maintains ±5% output accuracy across -40°C to +125°C ambient, ensuring sensor calibration integrity. |
| Automotive Infotainment Display Backlight | Telematics GPS Module Supply |
Use Scenario: Providing 5V bias for LED driver ICs in dashboard LCD backlight circuits powered from 12V vehicle bus. IC Role / Device Role / Timing Role: Low-quiescent-current linear regulator supporting always-on display functionality. Use Value: Delivers 15mA at <6700µA IQ even at 60V input, minimizing standby power draw during ignition-off. | Use Scenario: Generating 5V for GPS receiver ICs and cellular modem interfaces in vehicle telematics units. IC Role / Device Role / Timing Role: Input-transient-tolerant regulator protecting sensitive RF circuitry from battery voltage spikes. Use Value: Withstands 60V input surges per ISO 7637-2 Pulse 5a, avoiding need for external TVS clamping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV71350PDBVR | Lower IQ (45µA typ), tighter VOUT tolerance (±1%), but max VIN = 5.5V - requires pre-regulation stage. | Not suitable for direct 12V/24V input; limited to post-regulated 5V domains. | Select when ultra-low standby power and high accuracy outweigh input voltage constraints. |
| LM2936Z-5.0/NOPB | Higher VIN limit (60V), wider temp range (-40°C to +125°C), but larger SOIC-8 package and no AEC-Q101 qualification. | Lacks automotive qualification; unsuitable for PPAP-managed production programs. | Select for industrial applications needing same voltage specs but no automotive compliance. |
Compared with TLV71350PDBVR and LM2936Z-5.0/NOPB, ZXTR2105FQ uniquely combines 60V input capability, AEC-Q101 qualification, and SOT23 footprint - enabling single-chip 12V/24V-to-5V regulation in space- and reliability-critical automotive modules without external components.
Availability
ZXTR2105FQ is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, telematics GPS modules, and infotainment display backlight circuits requiring stable component supply and AEC-Q101 compliance.
Supply support for ZXTR2105FQ 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 devices.
The ZXTR series targets automotive and industrial linear regulation needs, designed specifically to replace discrete transistor-zener-resistor combinations with monolithic, qualified, and footprint-optimized solutions.
FAQ
What is the minimum input voltage required for regulation?
The ZXTR2105FQ requires a minimum input voltage of 7V to maintain regulated 5V output. Below 7V, the output follows VIN minus approximately 1V (VOUT ≈ VIN – 1V). This threshold is defined by the internal zener reference and emitter-base voltage drop, and is verified across temperature and load conditions per datasheet Section 4.
Can ZXTR2105FQ drive a 50mA load?
No - the device is rated for 15mA nominal output and 89mA maximum at VIN = 12V (derated at higher VIN). Attempting 50mA operation exceeds safe operating area limits, risking thermal shutdown or permanent damage. For >20mA loads, use a pass transistor or switching regulator.
Is an output capacitor mandatory?
Yes - a minimum 10µF ceramic or tantalum capacitor is required between VOUT and GND to ensure stability and transient response. The datasheet specifies this for maintaining regulation and preventing oscillation, especially under load step changes. Omitting it causes output voltage instability and potential device failure.
Does ZXTR2105FQ require a minimum load current?
Yes - a minimum load of 10µA must be drawn from VOUT to maintain regulation. This ensures proper biasing of the internal transistor and zener. Applications with intermittent or zero-load states (e.g., deep sleep modes) must include a bleeder resistor or active load to meet this requirement.
ZXTR2105FQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 89mA
- Current - Quiescent (Iq):
- 800 µA
- Current - Supply (Max):
- 6.7 mA
- PSRR:
- 46dB (100Hz)
- Control Features:
- -
- Protection Features:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZXTR2105FQ-7 FAQ
1.How can I place an order for ZXTR2105FQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXTR2105FQ-7 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 ZXTR2105FQ-7 reliable?
The price and inventory of ZXTR2105FQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTR2105FQ-7 is usually 5 days.
3.What payment methods are accepted for ZXTR2105FQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTR2105FQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXTR2105FQ-7?
ZXTR2105FQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXTR2105FQ-7 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 ZXTR2105FQ-7?
For technical support, including ZXTR2105FQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTR2105FQ-7 requirements.
6.How does Aetrix verify that ZXTR2105FQ-7 is sourced from the original manufacturer or authorized distributors?
All ZXTR2105FQ-7 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 ZXTR2105FQ-7 meets industry standards.
7.What is the process for return or replacement of ZXTR2105FQ-7?
All ZXTR2105FQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXTR2105FQ-7, 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 ZXTR2105FQ-7 part is unused and in its original packaging.
Return procedure for ZXTR2105FQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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