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Diodes Incorporated ZXTR2105F-7
- Part No.:
- ZXTR2105F-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXTR2105F-7.pdf
- Description:
- IC REG LINEAR 5V 89MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:101,000
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Product details
Overview
ZXTR2105F-7 from Diodes Incorporated is a monolithic 5V ±5% linear regulator transistor in SOT23, integrating an emitter-follower transistor, zener diode, and bias resistor. It delivers 15mA regulated output across 7–60V input, with 4.75–5.25V output voltage, 33mV typical line regulation (10–15V), and 200°C/W thermal resistance (junction-to-ambient). It serves as a compact, high-voltage rail converter for industrial control power supplies.
For engineers reviewing the ZXTR2105F-7 datasheet, ZXTR2105F-7 pinout, ZXTR2105F-7 application, or ZXTR2105F-7 equivalent, key selection criteria include input voltage range (7–60V), output current capability (15mA steady-state), thermal derating behavior, and AEC-Q101 qualification for automotive-adjacent reliability.
Technical Context
The ZXTR2105F-7 implements a series linear regulator using an emitter-follower topology, where the integrated zener sets base voltage and the transistor provides current gain and low-dropout pass functionality. Regulation is maintained only when VIN ≥ 7V; below that, VOUT follows VIN – 1V.
It operates without external feedback components-output voltage is fixed by internal zener and transistor VBE. Quiescent current ranges from 450µA (VIN = 12V) to 6.7mA (VIN = 60V), directly impacting no-load efficiency and thermal load at high input voltages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±5% - fixed regulation point; ensures stable 5V logic supply under varying load and temperature. |
| Input Voltage Range | 7 V to 60 V - enables direct regulation from unregulated industrial rails (e.g., 24V, 48V) without pre-regulation. |
| Max Output Current | 15 mA continuous - sufficient for low-power microcontrollers, sensors, or interface ICs; limited by thermal dissipation in SOT23. |
| Line Regulation | 33 mV (typ, 10–15V) - small output shift over common input variations; critical for stable reference in analog circuits. |
| Thermal Resistance θJA | 200 °C/W (25mm × 25mm Cu) - defines maximum power dissipation (625 mW) and safe operating area at ambient +25°C. |
| Quiescent Current | 450 µA to 6.7 mA - scales with input voltage; dominates no-load power loss in battery or energy-sensitive systems. |
| PSRR | 46 dB @ 100 Hz - suppresses low-frequency ripple from upstream supplies; supports noise-sensitive analog subsystems. |
Pinout & Package
Package: SOT23 - surface-mount, 3-pin plastic package (2.9 mm × 1.3 mm × 1.0 mm), RoHS-compliant, halogen-free, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Supply | Accepts 7–60V DC; must be decoupled with ≥1µF capacitor to GND; absolute max = 60V. |
| GND | Power Ground | Reference node for all voltages; must connect 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 Emitter-Follower Regulator | Eliminates need for external pass transistor + zener + resistor network; reduces BOM count and layout area. |
| AEC-Q101 Qualified | Validated for automotive-grade reliability (−40°C to +150°C junction, ESD HBM 4kV), suitable for harsh industrial environments. |
| Fixed 5V Output with Tight Tolerance | ±5% over full temperature and load range ensures compatibility with 5V TTL/CMOS logic and ADC references. |
| Lead-Free & Green Construction | Meets RoHS 2 and halogen/antimony-free standards (<900 ppm Br/Cl, <1000 ppm Sb); supports eco-compliant manufacturing. |
| Low Minimum Input Voltage | Starts regulation at VIN = 7V - enables use with marginally regulated 12V supplies where dropout headroom is constrained. |
Applications
| Industrial Sensor Node Power | Automotive Body Control Module (BCM) Auxiliary Rail |
|---|---|
|
Use Scenario: Powers low-current analog sensors (e.g., pressure transducers, thermistors) in factory automation cabinets with 24V backplane. IC Role / Device Role / Timing Role: Provides isolated 5V reference rail from noisy 24V supply; acts as local linear regulator with minimal external components. Use Value: Eliminates need for discrete zener+transistor solution, reducing PCB footprint by >50% and improving long-term stability vs. resistor-based biasing. |
Use Scenario: Supplies 5V to LIN transceivers and microcontroller peripherals in non-safety-critical BCM subassemblies. IC Role / Device Role / Timing Role: Functions as secondary regulator downstream of main 12V battery rail; leverages AEC-Q101 qualification for extended temperature operation. Use Value: Enables single-SOT23 replacement for legacy discrete regulators, simplifying qualification while meeting automotive reliability requirements. |
| Programmable Logic Controller (PLC) I/O Isolation Rail | Smart Meter MCU Bias Supply |
|
Use Scenario: Generates 5V for optocoupler input stages and isolated ADC drivers in modular PLC I/O modules. IC Role / Device Role / Timing Role: Delivers clean, low-noise 5V from 48V field bus; operates within safe SOA up to 60V input transients. Use Value: Withstands 60V surges without external clamping; PSRR of 46 dB attenuates switching noise from adjacent DC-DC converters. |
Use Scenario: Powers metrology MCU and real-time clock in battery-backed smart electricity meters with wide-input AC/DC adapters. IC Role / Device Role / Timing Role: Serves as ultra-low-quiescent auxiliary regulator during battery backup mode; draws only 450µA at 12V input. Use Value: Extends battery life by minimizing no-load current versus standard LDOs; maintains regulation down to 7V input during brownout conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTR2102F-7 | 2.5V output (±5%), same SOT23 package and 7–60V input range; lower quiescent current (350µA typ at 12V). | Used where 2.5V reference or low-voltage logic is required instead of 5V; not interchangeable without circuit redesign. | Select when system requires 2.5V rail and tighter output tolerance is needed (±3% option available). |
| MCP1703T-5002E/MB | 5V LDO with 250mA output, 6V max input, 1.6µA quiescent current; requires external bypass capacitor and has different pinout (SOT89-3). | Higher current capability but incompatible input voltage range; unsuitable for 24V/48V direct regulation without pre-regulation. | Choose only if input is ≤6V and >100mA load is needed; not a drop-in replacement due to voltage and package mismatch. |
Compared with ZXTR2105F-7, ZXTR2102F-7 offers identical form-factor and high-voltage support but targets 2.5V systems, while MCP1703T-5002E/MB trades input voltage range for ultra-low IQ and higher output current-making it viable only in low-input, high-current scenarios.
Availability
ZXTR2105F-7 is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, and programmable logic controller I/O isolation rails requiring stable component supply across extended temperature and high-voltage operating conditions.
Supply support for ZXTR2105F-7 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, application-optimized components for industrial, automotive, and computing markets.
The ZXTR series targets high-voltage linear regulation needs where space-constrained, integrated solutions replace discrete zener-transistor networks-designed specifically for robustness in 24V/48V industrial and automotive auxiliary power domains.
FAQ
What is the minimum load current required for regulation?
The ZXTR2105F-7 requires a minimum load of 10µA on VOUT to maintain regulation. Below this threshold, output voltage may rise above 5V due to insufficient bias current through the internal zener. This is specified in the datasheet's "Typical Application Circuit" section and confirmed in the "Pin Functions" table.
Can ZXTR2105F-7 operate with input voltages below 7V?
Yes, but regulation is lost: when VIN < 7V, VOUT tracks VIN – 1V (e.g., VIN = 5V → VOUT ≈ 4V). The device remains functional and safe down to −0.3V, but does not regulate. This behavior is explicitly defined in the "Pin Functions" and "Absolute Maximum Ratings" sections of DS37244 Rev.6-2.
Is a heatsink required for continuous 15mA operation at 60V input?
Yes-under worst-case conditions (VIN = 60V, IOUT = 15mA), power dissipation reaches ~825mW (60V − 5V × 15mA), exceeding the 625mW rated limit for SOT23 on 25mm × 25mm copper. Derating is mandatory; operation requires either reduced load, lower input voltage, or enhanced PCB copper area per the Safe Operating Area curves in the datasheet.
How does the ZXTR2105F-7 differ from the automotive-grade ZXTR2105FQ?
The ZXTR2105FQ is identical in electrical and mechanical specifications but undergoes additional AEC-Q101 stress testing (including extended temperature cycling and HTOL) and ships with automotive-specific traceability documentation. The -7 suffix denotes tape-and-reel packaging (3,000 units/reel); the Q variant uses the same marking code (2T1) and SOT23 package but is qualified for automotive production lots.
ZXTR2105F-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
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZXTR2105F-7 FAQ
1.How can I place an order for ZXTR2105F-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXTR2105F-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 ZXTR2105F-7 reliable?
The price and inventory of ZXTR2105F-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTR2105F-7 is usually 5 days.
3.What payment methods are accepted for ZXTR2105F-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTR2105F-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXTR2105F-7?
ZXTR2105F-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXTR2105F-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 ZXTR2105F-7?
For technical support, including ZXTR2105F-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTR2105F-7 requirements.
6.How does Aetrix verify that ZXTR2105F-7 is sourced from the original manufacturer or authorized distributors?
All ZXTR2105F-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 ZXTR2105F-7 meets industry standards.
7.What is the process for return or replacement of ZXTR2105F-7?
All ZXTR2105F-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXTR2105F-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 ZXTR2105F-7 part is unused and in its original packaging.
Return procedure for ZXTR2105F-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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