My Inquiry
My Account
Diodes Incorporated ZXTR2105FF-7
- Part No.:
- ZXTR2105FF-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-23-3 Flat Leads
- Datasheet:
-
ZXTR2105FF-7.pdf
- Description:
- IC REG LINEAR 5V 89MA SOT23F
- Quantity:
- Payment:
- Shipping:
Inventory:8,352
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ZXTR2105FF from Diodes Incorporated is a monolithic 5V ±5% linear regulator transistor in SOT23F, integrating an emitter-follower transistor, zener reference, and bias resistor. It delivers 15mA regulated output across 7–60V input, operates up to +150°C junction temperature, and targets high-voltage industrial power rails where standard LDOs fail. Used for 12V-to-5V and 24V-to-5V conversion in space-constrained control modules.
For engineers reviewing the ZXTR2105FF datasheet, ZXTR2105FF pinout, ZXTR2105FF application, or ZXTR2105FF equivalent, key selection criteria include input voltage range (7–60V), output tolerance (±5%), thermal resistance (95°C/W on 25mm² copper), quiescent current (450–6700µA), and SOT23F package compatibility with automated assembly.
Technical Context
The ZXTR2105FF implements a series linear regulator using an emitter-follower topology with internal zener-based voltage reference and fixed bias network. Regulation occurs without external feedback components, relying on integrated device matching and thermal stability over −40°C to +150°C.
It functions as a self-contained 5V regulator requiring only input and output capacitors (1µF at VIN, 10µF at VOUT). Minimum load requirement is 10µA; output clamps to VIN−1V below 7V input and is limited to max(VIN+5V, 10V) when pulled high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±5% - stable regulation at 15mA load across full input and temperature range |
| Input Voltage Range | 7 V to 60 V - enables direct regulation from 12V/24V/48V industrial buses without pre-regulation |
| Max Output Current | 89 mA @ VIN=12V - defines usable load capacity under worst-case thermal conditions on standard PCB |
| Quiescent Current | 450–6700 µA - scales with input voltage; critical for low-power standby operation |
| Thermal Resistance θJA | 95 °C/W - measured on 25mm × 25mm 1oz Cu; determines max power dissipation (1.3W) at +25°C ambient |
| Line Regulation | 33–700 mV - variation over input range; tighter (33 mV) between 10–15V, looser (700 mV) across 7–60V |
| Load Regulation | −20 to −300 mV - output droop from 10mA to 50mA load; impacts precision analog supply stability |
Pinout & Package
SOT23F package: 3-pin surface-mount plastic case (2.90 mm × 2.40 mm × 1.00 mm), matte tin-plated leads, moisture sensitivity level 1, UL 94V-0 rated molding compound.
| 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-inductance path |
| VOUT | Voltage Output | Delivers regulated 5V; requires 10µF output capacitor and minimum 10µA load for stable regulation |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic Emitter-Follower Regulator | Eliminates need for external pass transistor, zener, and bias resistor-reduces BOM count and layout area |
| Wide Input Range (7–60V) | Supports direct connection to unregulated industrial DC rails without step-down pre-regulator stage |
| Integrated Thermal Protection | Junction temperature limit of +150°C ensures safe shutdown before silicon damage under overload or poor heatsinking |
| Lead-Free & Halogen-Free Construction | Meets RoHS 3 (2015/863/EU), <900ppm Br/Cl, <1000ppm Sb - compliant for automotive and green industrial designs |
| ESD Robustness | 4kV HBM rating - withstands handling and board-level ESD events without functional degradation |
Applications
| Industrial PLC I/O Module Power | Automotive Body Control Unit (BCU) |
|---|---|
Use Scenario: Regulating 24V vehicle battery rail to 5V for microcontroller and sensor interface circuitry in door module ECUs. IC Role / Device Role / Timing Role: Primary 5V linear regulator supplying MCU core logic and CAN transceiver VIO. Use Value: Withstands load dump transients up to 60V and operates reliably at +105°C ambient-no external TVS or thermal derating required. |
Use Scenario: Providing stable 5V bias to analog front-end circuits in programmable logic controller digital input cards. IC Role / Device Role / Timing Role: Local point-of-load regulator for isolated 24V field-side inputs feeding optocoupler drivers. Use Value: Delivers 15mA with ±5% accuracy across −40°C to +85°C, enabling precise ADC reference and comparator thresholds. |
| Smart Sensor Node Power | Legacy Industrial Equipment Retrofit |
Use Scenario: Powering ultra-low-power wireless sensor nodes powered from 12V PoE-derived supplies or 24V building automation bus. IC Role / Device Role / Timing Role: Always-on 5V regulator supporting sleep-mode MCU and RF transceiver wake-up circuitry. Use Value: Quiescent current as low as 450µA at 12V input extends battery life; SOT23F footprint fits dense IoT module layouts. |
Use Scenario: Replacing obsolete discrete zener-transistor regulators in aging factory HMIs and motor drives during maintenance upgrades. IC Role / Device Role / Timing Role: Drop-in functional replacement for legacy 5V shunt-series hybrid regulators with identical pinout and footprint. Use Value: Reduces component count by 3 devices per rail while improving long-term drift stability and thermal reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTR2105F-7 | SOT23 (not SOT23F); 0.95mm height vs. 1.00mm; slightly lower RθJA (90°C/W) | Same electrical specs but different mechanical profile; not interchangeable in height-constrained designs | Select only if board stack height allows taller SOT23 variant and thermal margin is tight |
| AP2112K-5.0 | LDO architecture; 300mV dropout; 600mA output; requires external feedback resistors for fixed 5V | Higher current, lower dropout, but needs external components and cannot withstand >6V input | Choose for low-dropout, high-current 5V rails where input stays ≤6V; not suitable for 12V+/60V use |
Compared with ZXTR2105FF, ZXTR2105F-7 offers marginally better thermal performance but lacks SOT23F's standardized leadform for automated optical inspection; AP2112K-5.0 provides higher output current and lower dropout but fails catastrophically above 6V input-making it unsuitable for high-voltage industrial regulation.
Availability
ZXTR2105FF-7 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, smart sensor nodes, and legacy equipment retrofits requiring stable component supply across extended temperature and voltage ranges.
Supply support for ZXTR2105FF-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 power management, signal integrity, and protection solutions for industrial, automotive, and computing markets.
The ZXTR series targets high-voltage linear regulation where integration, ruggedness, and small footprint are prioritized over ultra-low dropout or high current-designed specifically for cost-sensitive, space-constrained industrial control and retrofit applications.
FAQ
What is the minimum load required for stable regulation?
The ZXTR2105FF requires a minimum load of 10µA on VOUT to maintain regulation. Below this, output voltage may rise above 5.25V due to lack of current through the internal zener reference. A 100kΩ pull-down resistor satisfies this requirement and adds negligible quiescent loss.
Can ZXTR2105FF regulate from 5V input?
No. The device requires a minimum input voltage of 7V to achieve regulated 5V output. At VIN < 7V, VOUT follows VIN minus ~1V (e.g., 4V out at 5V in), functioning as a saturated emitter follower-not a regulator. It is not suitable for low-dropout or battery-powered 5V systems.
How does thermal performance change on smaller PCB copper areas?
When mounted on 15mm × 15mm 1oz copper instead of the reference 25mm × 25mm, RθJA increases from 95°C/W to 126°C/W. This reduces maximum continuous power dissipation from 1.3W to ~0.98W at +25°C ambient-requiring derating above 75°C ambient or limiting output current at high VIN.
Is ZXTR2105FF-7 AEC-Q101 qualified?
Yes. The ZXTR2105FF-7 carries AEC-Q101 qualification per ordering information in the datasheet, confirming stress-tested reliability for automotive under-hood and body electronics applications-including HTOL, TCT, and ESD validation per JEDEC standards.
ZXTR2105FF-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-3 Flat Leads
- 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):
- -
- Current - Supply (Max):
- 6.7 mA
- PSRR:
- 46dB (100Hz)
- Control Features:
- -
- Protection Features:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23F
ZXTR2105FF-7 FAQ
1.How can I place an order for ZXTR2105FF-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXTR2105FF-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 ZXTR2105FF-7 reliable?
The price and inventory of ZXTR2105FF-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTR2105FF-7 is usually 5 days.
3.What payment methods are accepted for ZXTR2105FF-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTR2105FF-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXTR2105FF-7?
ZXTR2105FF-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXTR2105FF-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 ZXTR2105FF-7?
For technical support, including ZXTR2105FF-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTR2105FF-7 requirements.
6.How does Aetrix verify that ZXTR2105FF-7 is sourced from the original manufacturer or authorized distributors?
All ZXTR2105FF-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 ZXTR2105FF-7 meets industry standards.
7.What is the process for return or replacement of ZXTR2105FF-7?
All ZXTR2105FF-7 units undergo pre-shipment inspection (PSI). If there is an issue with ZXTR2105FF-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 ZXTR2105FF-7 part is unused and in its original packaging.
Return procedure for ZXTR2105FF-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZXTR2105FF-7 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
