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Diodes Incorporated ZXTR2108F-7
- Part No.:
- ZXTR2108F-7
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZXTR2108F-7.pdf
- Description:
- IC REG LINEAR 8V 40MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,092
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Product details
Overview
ZXTR2108F-7 from Diodes Incorporated is a monolithic 60V-input, 8V/15mA series linear regulator transistor in SOT23 package, integrating an emitter-follower transistor, zener reference, and bias resistor. It delivers stable 8V ±10% output across 10–60V input range, supports 40mA continuous output at VIN=24V, and operates from –65°C to +150°C junction temperature - used for 24V-to-8V rail regulation in industrial control modules.
For engineers reviewing the ZXTR2108F-7 datasheet, ZXTR2108F-7 pinout, ZXTR2108F-7 application, or ZXTR2108F-7 equivalent, key selection criteria include input voltage range (10–60V), regulated output tolerance (±10%), quiescent current (260–6000 µA), thermal resistance (200°C/W on 25mm×25mm PCB), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
The ZXTR2108F-7 implements a fixed-output series linear regulator using an emitter-follower topology with internal zener-based reference and integrated bias network. It requires no external feedback components and maintains regulation only when load draws ≥10µA.
Its safe operating area is defined by input voltage (≤60V), output current (≤40mA DC at 25°C), and power dissipation (625mW max on 25mm×25mm copper). Thermal derating begins above 25°C ambient, with RΘJA = 200°C/W and RΘJL = 197°C/W enabling predictable junction temperature estimation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 8V ±10% - delivers stable 7.2–8.8V under 15mA load at VIN=24V; enables direct powering of 8V logic or analog ICs without external feedback. |
| Input Voltage Range | 10V to 60V - supports wide industrial supply rails (e.g., 24V, 36V, 48V) while rejecting transients up to 60V absolute max. |
| Continuous Output Current | 40mA at VIN=24V, TA=25°C - sufficient for low-power microcontrollers, sensors, or gate drivers; limited by thermal dissipation in SOT23. |
| Quiescent Current | 260–6000 µA - increases with VIN; impacts standby power in battery-backed systems; measured at IOUT=10µA. |
| Line Regulation | 15–120 mV - variation over VIN=10–60V at fixed 15mA load; defines stability against input ripple or sag in unregulated supplies. |
| Power Supply Rejection Ratio | 45 dB at 100Hz - suppresses low-frequency input noise; critical for clean supply to sensitive analog circuitry. |
| Thermal Resistance (Junction–Ambient) | 200°C/W - on 25mm×25mm 1oz Cu PCB; determines maximum allowable power before exceeding 150°C junction limit. |
Pinout & Package
Package: SOT23 (3-pin, surface-mount), molded plastic, RoHS-compliant, matte tin-plated leads, moisture sensitivity level 1 per J-STD-020, weight ≈0.008 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Supply | Accepts –0.3V to 60V; must be ≥10V for regulation; requires 1µF bypass capacitor to GND for stability. |
| GND | Power Ground | Reference node for all voltages; must connect directly to system ground plane to minimize noise and ensure regulation accuracy. |
| VOUT | Voltage Output | Delivers regulated 8V; requires ≥10µA minimum load and 10µF output capacitor to GND for transient response and stability. |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic Emitter-Follower Regulator | Integrates pass transistor, zener reference, and bias resistor - eliminates discrete BOM count and layout complexity vs. 3-component solution. |
| AEC-Q101 Qualified | Validated for automotive applications including engine control units and body electronics - ensures reliability under thermal cycling and vibration stress. |
| Lead-Free & Halogen-Free | Meets RoHS 2 (2011/65/EU) and "Green" definition (<900ppm Br, <900ppm Cl, <1000ppm Sb) - compliant for eco-sensitive industrial and consumer designs. |
| Wide Input Range Support | Regulates from 10V to 60V input - enables single-part use across multiple supply architectures (24V, 36V, 48V) without redesign. |
| ESD Robustness | HBM rating of 4000V - protects against handling damage during assembly and improves field reliability in high-noise environments. |
Applications
| Industrial PLC I/O Module Power | Automotive Body Control Unit (BCU) |
|---|---|
|
Use Scenario: Providing isolated 8V rail from 24V chassis supply to power analog sensor interfaces and optocoupler drivers in programmable logic controller modules. IC Role / Device Role / Timing Role: Fixed-output linear regulator delivering stable 8V at ≤30mA with minimal external components. Use Value: Eliminates need for external feedback resistors and reduces PCB area by >50% versus discrete transistor-zener-resistor design. |
Use Scenario: Generating 8V supply for microcontroller peripherals (CAN transceivers, LIN drivers) in body control units powered from 12V/24V battery systems. IC Role / Device Role / Timing Role: High-voltage-input regulator supporting cold-crank (6.5V) to load-dump (60V) conditions while maintaining regulated output. Use Value: AEC-Q101 qualification and 150°C max junction temperature enable operation in under-hood environments without derating. |
| Smart Meter Auxiliary Power | Factory Automation Sensor Node |
|
Use Scenario: Deriving 8V bias from 36V DC bus to power metrology ADCs and real-time clocks in utility smart meters with long-life requirements. IC Role / Device Role / Timing Role: Low-quiescent-current linear regulator ensuring <10µA standby draw when main system is asleep. Use Value: Quiescent current as low as 260µA at VIN=12V minimizes battery drain during meter sleep cycles. |
Use Scenario: Supplying 8V to MEMS accelerometers and wireless SoCs in battery-powered predictive maintenance sensors deployed on rotating machinery. IC Role / Device Role / Timing Role: Compact, thermally efficient regulator enabling operation in confined enclosures with ambient temperatures up to 85°C. Use Value: Use Value: SOT23 footprint and 200°C/W RΘJA allow full 40mA output without heatsink in space-constrained industrial housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output high-voltage linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL783CP | Adjustable output (1.25–125V), higher dropout (1.5V min), TO-220 package, 700mW PD | Requires external resistive divider; unsuitable for space-constrained SMT designs; better for ultra-high-VIN (>60V) or variable-output needs | Select TL783CP only if adjustable output or >60V input capability is required; not drop-in due to package and feedback dependency. |
| LM2931Z-8.0 | Fixed 8V output, 40V max VIN, TO-92/SOT89, 100mA IOUT, 1.3V dropout | Limited to ≤40V input; lacks AEC-Q101 qualification; lower thermal performance in SOT89 vs. SOT23 | Choose LM2931Z-8.0 for cost-sensitive non-automotive applications below 40V input where higher output current is needed. |
Compared with TL783CP and LM2931Z-8.0, the ZXTR2108F-7 uniquely combines 60V input capability, AEC-Q101 qualification, SOT23 footprint, and zero-external-component operation - making it optimal for compact, automotive-grade 8V regulation where input exceeds 40V.
Availability
ZXTR2108F-7 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and smart meter auxiliary power supplies requiring stable component supply with AEC-Q101 assurance and SMT manufacturability.
Supply support for ZXTR2108F-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 automotive, industrial, and computing markets.
The ZXTR series targets high-voltage linear regulation in space-constrained applications, combining integration, ruggedness, and qualification to meet demanding environmental and safety standards.
FAQ
What is the minimum load current required for regulation?
The ZXTR2108F-7 requires a minimum load of 10µA on VOUT to maintain regulation. Below this threshold, output voltage drops below 8V and line/load regulation specifications no longer apply. A small bleed resistor or active load must be added if downstream circuitry draws less than 10µA in any operating mode.
Can ZXTR2108F-7 regulate with input voltage below 10V?
No - regulation is only guaranteed for VIN ≥10V. At VIN <10V, VOUT follows VIN minus ~1V (i.e., VOUT ≈ VIN – 1V), with no zener reference engagement. The device remains functional but does not provide stable 8V output; it behaves as a saturated emitter follower.
How does thermal performance change on smaller PCB copper areas?
When mounted on 15mm×15mm 1oz copper instead of 25mm×25mm, RΘJA degrades from 200°C/W to 250°C/W. This reduces maximum allowable continuous power from 625mW to 500mW at 25°C ambient, limiting usable output current at elevated temperatures - derating curves in DS37330 must be consulted for precise limits.
Is ZXTR2108F-7 compatible with lead-free reflow profiles?
Yes - the device is fully RoHS-compliant with matte tin-plated leads and qualified for standard lead-free reflow (J-STD-020 Level 1). Peak reflow temperature up to 260°C is supported, and moisture sensitivity level 1 allows unlimited floor life without dry-pack requirements.
ZXTR2108F-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):
- 8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 40mA
- Current - Quiescent (Iq):
- 500 µA
- Current - Supply (Max):
- 6 mA
- PSRR:
- 45dB (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
ZXTR2108F-7 FAQ
1.How can I place an order for ZXTR2108F-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXTR2108F-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 ZXTR2108F-7 reliable?
The price and inventory of ZXTR2108F-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTR2108F-7 is usually 5 days.
3.What payment methods are accepted for ZXTR2108F-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTR2108F-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXTR2108F-7?
ZXTR2108F-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXTR2108F-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 ZXTR2108F-7?
For technical support, including ZXTR2108F-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTR2108F-7 requirements.
6.How does Aetrix verify that ZXTR2108F-7 is sourced from the original manufacturer or authorized distributors?
All ZXTR2108F-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 ZXTR2108F-7 meets industry standards.
7.What is the process for return or replacement of ZXTR2108F-7?
All ZXTR2108F-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXTR2108F-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 ZXTR2108F-7 part is unused and in its original packaging.
Return procedure for ZXTR2108F-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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