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Diodes Incorporated ZMR250QFTA
- Part No.:
- ZMR250QFTA
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZMR250QFTA.pdf
- Description:
- LINEAR REG LOW CURR SOT23 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:3,261
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Product details
Overview
ZMR250QFTA from Diodes Incorporated is a fixed-output 2.5 V positive voltage regulator in SOT23 (Type DN) package, designed for automotive point-of-load regulation with 50 mA output current capability, 30 µA quiescent current, and AEC-Q100 Grade 1 qualification. It operates over input voltages from 4.2 V to 22.5 V and maintains regulation down to 3.9 V input.
For engineers reviewing the ZMR250QFTA datasheet, ZMR250QFTA pinout, ZMR250QFTA application, or ZMR250QFTA equivalent, key selection criteria include dropout behavior at low load, thermal shutdown integrity under 125°C junction temperature, ripple rejection ≥55 dB at 120 Hz, and stability without external capacitors in automotive ECU power rails.
Technical Context
This monolithic IC integrates internal current limiting and thermal shutdown circuitry, enabling robust operation in automotive environments where transient overloads and ambient temperature extremes occur. Its unconditionally stable design eliminates need for external compensation components across full load and temperature range.
The regulator uses a bandgap reference and error amplifier topology to deliver tight initial output tolerance (±2.5% at 25°C) and low temperature coefficient (0.275–0.700 mV/°C), supporting precision biasing in sensor signal chains and microcontroller I/O supply domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±2.5% (2.36–2.64 V over –40°C to +125°C), enabling direct MCU core or analog sensor rail supply |
| Max Output Current | 50 mA continuous, sufficient for powering CAN transceivers, LIN interface ICs, or small microcontrollers |
| Quiescent Current | 30 µA typical at 25°C, minimizing standby power loss in always-on vehicle modules |
| Ripple Rejection | 55–75 dB at 120 Hz, suppressing alternator ripple in 12 V battery-fed systems |
| Droput Voltage | ≤3.9 V input required to maintain regulation, implying ~1.4 V dropout at full load and 25°C |
| Thermal Shutdown | Activates at +125°C junction temperature, protecting against sustained overload in enclosed ECUs |
| AEC-Q100 Grade | Qualified to Grade 1 (–40°C to +125°C ambient), meeting automotive reliability and PPAP requirements |
Pinout & Package
SOT23 (Type DN) surface-mount package: 3-pin, lead-free, halogen- and antimony-free "Green" construction per Diodes Incorporated specifications; footprint compatible with JEDEC TO-236AB standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input voltage terminal | Accepts 4.2–22.5 V DC; internal current limit protects against short-circuit faults |
| VOUT | Regulated output terminal | Delivers stable 2.5 V ±2.5%; no external capacitor required for stability |
| GND | Ground reference terminal | Common return path for load current and internal bias; connects to PCB ground plane for thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Unconditionally stable | No external capacitor needed for loop stability - reduces BOM count and board space in space-constrained modules |
| Internal short-circuit protection | Current-limited output prevents damage during wiring faults or downstream component failure |
| Low thermal resistance | 500 mW power dissipation at 25°C ambient enables operation up to +125°C junction temperature with proper PCB copper area |
| AEC-Q100 qualified | Grade 1 qualification ensures reliability for engine control, body electronics, and ADAS domain controllers |
| Green molding compound | Halogen- and antimony-free formulation meets automotive OEM environmental compliance mandates |
Applications
| Engine Control Unit (ECU) Sensor Bias | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Powering analog sensors (e.g., MAP, TPS, O2) requiring precise 2.5 V reference in high-temperature under-hood environments. IC Role / Device Role / Timing Role: Fixed-output voltage regulator providing stable bias voltage independent of battery fluctuations. Use Value: Maintains sensor accuracy over –40°C to +125°C ambient with <0.7 mV/°C drift, eliminating need for calibration compensation. |
Use Scenario: Supplying 2.5 V logic rails for LIN transceivers and door module microcontrollers in low-power sleep modes. IC Role / Device Role / Timing Role: Low-quiescent-current regulator enabling <30 µA system standby current. Use Value: Extends battery life in parked vehicle scenarios while maintaining wake-up responsiveness via LIN bus. |
| Advanced Driver Assistance Systems (ADAS) Camera Module | Automotive Infotainment Power Sequencing |
Use Scenario: Providing clean 2.5 V supply to image sensor analog front-end (AFE) in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: Low-noise (65 µVrms) LDO delivering ripple-free bias to noise-sensitive pixel arrays. Use Value: Reduces fixed-pattern noise and improves SNR by rejecting alternator ripple and switching converter noise. |
Use Scenario: Generating auxiliary 2.5 V rail for FPGA configuration memory or audio codec I/O in head unit designs. IC Role / Device Role / Timing Role: Secondary regulator sequenced after main 5 V/3.3 V supplies to meet power-up timing requirements. Use Value: Ensures reliable FPGA configuration and audio subsystem initialization without external sequencing IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73325PDBVR | 300 mA output, 65 µA IQ, 1.4 V min input, not AEC-Q100 qualified | Higher drive capability but lacks automotive qualification and thermal shutdown threshold specification | Select when higher current and lower dropout are needed, and automotive qualification is not required |
| NCP1117ST2.5T3G | 1 A output, 6 mA IQ, TO-220/SOT-223, AEC-Q100 Grade 3 (–40°C to +85°C) | Higher power handling but larger package and higher quiescent current limits use in ultra-low-power modules | Select for cost-sensitive non-critical body electronics where thermal derating margin is acceptable |
Compared with TLV73325PDBVR and NCP1117ST2.5T3G, ZMR250QFTA uniquely balances ultra-low quiescent current (30 µA), AEC-Q100 Grade 1 qualification, and SOT23 footprint-making it optimal for space- and power-constrained automotive modules where reliability and thermal resilience are non-negotiable.
Availability
ZMR250QFTA is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and ADAS camera systems requiring stable component supply with full traceability and PPAP support.
Supply support for ZMR250QFTA 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 solutions for automotive, industrial, and consumer markets.
ZMR250QFTA belongs to the ZMR series of automotive-grade fixed-output LDO regulators, engineered specifically for point-of-load regulation in harsh-temperature, high-vibration vehicle subsystems.
FAQ
Is ZMR250QFTA stable without an output capacitor?
Yes. The ZMR250QFTA is unconditionally stable and does not require an external output capacitor for loop stability, as confirmed in the DS37014 datasheet Section 1. This simplifies layout and reduces component count in space-constrained automotive modules.
What is the minimum input voltage required to maintain 2.5 V regulation at 50 mA?
The datasheet specifies a minimum input voltage of 3.9 V to maintain regulation at full 50 mA load and 25°C ambient. At higher temperatures or loads, the effective dropout increases linearly due to thermal derating of internal pass element performance.
Does ZMR250QFTA include reverse-polarity protection?
No. The ZMR250QFTA does not integrate reverse-polarity protection. External diode or MOSFET-based protection must be added if the application risks reversed input connections, as stated in the Absolute Maximum Ratings section of DS37014.
Can ZMR250QFTA be used in parallel to increase output current?
No. The ZMR250QFTA is not designed for parallel operation. Its output voltage tolerance (±2.5%) and lack of current-sharing features mean paralleling would cause unequal current distribution and potential thermal runaway, as noted in the Applications section of the datasheet.
ZMR250QFTA 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):
- 22.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 50mA
- Current - Quiescent (Iq):
- 40 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23 (Type DN)
ZMR250QFTA FAQ
1.How can I place an order for ZMR250QFTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZMR250QFTA 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 ZMR250QFTA reliable?
The price and inventory of ZMR250QFTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZMR250QFTA is usually 5 days.
3.What payment methods are accepted for ZMR250QFTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZMR250QFTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZMR250QFTA?
ZMR250QFTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZMR250QFTA 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 ZMR250QFTA?
For technical support, including ZMR250QFTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZMR250QFTA requirements.
6.How does Aetrix verify that ZMR250QFTA is sourced from the original manufacturer or authorized distributors?
All ZMR250QFTA 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 ZMR250QFTA meets industry standards.
7.What is the process for return or replacement of ZMR250QFTA?
All ZMR250QFTA units undergo pre-shipment inspection (PSI). If there is an issue with ZMR250QFTA, 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 ZMR250QFTA part is unused and in its original packaging.
Return procedure for ZMR250QFTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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