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Diodes Incorporated ZMR500QFTA
- Part No.:
- ZMR500QFTA
- Manufacturer:
- Diodes Incorporated
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ZMR500QFTA.pdf
- Description:
- IC REG LINEAR 5V 50MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,499
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Product details
Overview
ZMR500QFTA from Diodes Incorporated is an automotive-grade, fixed-output 5.0V positive voltage regulator in SOT23 (Type DN) package, delivering up to 50mA output current with only 50μA typical quiescent current at +25°C and 70μA maximum over -40°C to +125°C. It features internal short-circuit current limiting, thermal shutdown, unconditionally stable operation without external capacitors, and AEC-Q100 Grade 1 qualification for under-hood automotive point-of-load regulation.
For engineers reviewing the ZMR500QFTA datasheet, ZMR500QFTA pinout, ZMR500QFTA application, or ZMR500QFTA equivalent, key selection criteria include its 5.0V ±2.5% output accuracy over temperature and load, 6.7V minimum input voltage for regulation, 72dB ripple rejection at 120Hz, 90µVrms output noise (10Hz–10kHz), and SOT23 footprint compatibility with space-constrained automotive ECUs and sensor modules.
Technical Context
This monolithic three-terminal linear regulator uses a bandgap reference and error amplifier to maintain precise 5.0V output across input voltages from 7.0V to 25V and load currents from 0 to 50mA. Its architecture integrates thermal foldback and current-limit protection, eliminating need for external safety components.
Designed for automotive environments, it operates continuously from -40°C to +125°C junction temperature, with 0.275–0.700mV/°C temperature coefficient and <40mV load regulation (0–50mA). The SOT23 (Type DN) package enables surface-mount integration on compact PCBs with minimal thermal mass.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.875V to 5.125V at +25°C; maintains regulation across -40°C to +125°C and 0–50mA load - ensures stable MCU/Sensor supply in engine bay conditions. |
| Input Voltage Range | 7.0V to 25V - supports 12V automotive battery systems with cold-crank and load-dump transients. |
| Quiescent Current | 50μA typical, 70μA max over full temp range - enables always-on subsystems with ultra-low standby power. |
| Ripple Rejection | 55dB min, 72dB typ at 120Hz - suppresses alternator ripple without external filtering. |
| Dropout Voltage | Not explicitly specified, but VIN ≥ 6.7V required for regulation at VOUT = 5.0V - implies ~1.7V headroom at full load. |
| Output Noise | 90μVrms (10Hz–10kHz) - suitable for analog sensors and low-noise ADC references. |
| Thermal Shutdown | Activates at +125°C junction temperature - protects against sustained overload or poor heatsinking. |
Pinout & Package
SOT23 (Type DN) package: 3-pin surface-mount plastic package with 0.95mm pitch, 2.80–3.04mm length, 2.10–2.64mm width, and 0.89–1.12mm height; RoHS-compliant, halogen- and antimony-free "Green" molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input voltage terminal | Accepts 7.0–25V DC; must be decoupled locally to ensure stability and transient response. |
| VOUT | Regulated output terminal | Delivers stable 5.0V ±2.5%; no external capacitor required for stability per datasheet. |
| GND | Ground reference terminal | Common return path for input and output currents; requires low-impedance PCB connection. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 qualified (-40°C to +125°C TJ), PPAP-capable - meets OEM requirements for production automotive electronics. |
| Low quiescent current | 50μA typical at +25°C, ≤70μA over full temperature range - extends battery life in always-on vehicle modules. |
| Unconditional stability | Stable with 0μF output capacitance - eliminates BOM cost and board space for external compensation caps. |
| Integrated protection | Internal current limit and thermal shutdown - removes need for discrete foldback or thermal sensors. |
| Low-noise output | 90μVrms broadband noise - supports precision analog front-ends in automotive sensors and instrumentation. |
Applications
| Engine Control Unit (ECU) Sensor Bias | Body Control Module (BCM) Microcontroller Supply |
|---|---|
Use Scenario: Powering Hall-effect crankshaft position sensors and analog pressure transducers in high-temperature engine compartments. IC Role / Device Role / Timing Role: Fixed 5.0V bias regulator providing stable excitation voltage independent of battery fluctuations. Use Value: Maintains sensor accuracy across -40°C to +125°C ambient with <40mV load regulation and 72dB ripple rejection. |
Use Scenario: Supplying 5V logic rails for 8-bit/16-bit MCUs in door modules, lighting controllers, and seat control units. IC Role / Device Role / Timing Role: Primary LDO for microcontroller core and I/O domains in distributed automotive nodes. Use Value: Enables low-power sleep modes via 50μA quiescent current while supporting 50mA peak loads during CAN wake-up events. |
| Advanced Driver Assistance Systems (ADAS) Camera Module | Telematics Control Unit (TCU) GPS Front-End |
Use Scenario: Regulating power to CMOS image sensor analog supply and ISP voltage domains in rear-view and surround-view cameras. IC Role / Device Role / Timing Role: Low-noise 5V source for analog pixel readout and clock generation circuitry. Use Value: 90μVrms output noise prevents visible banding in captured video; AEC-Q100 qualification ensures field reliability. |
Use Scenario: Providing clean 5V supply to GPS/GNSS RF front-end ICs and crystal oscillator circuits in cellular-connected TCUs. IC Role / Device Role / Timing Role: Post-regulator for GNSS receiver analog sections requiring low-phase-noise power. Use Value: Ripple rejection >55dB at 120Hz suppresses switching noise from PMICs, preserving GPS signal integrity. |
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 |
|---|---|---|---|
| TLV73350PDBVR | 5.0V output, 300mA rating, 65μA IQ, SOT23-5 package with enable pin - higher current, extra pin, different footprint. | Supports higher-current loads (e.g., multi-rail PMIC sequencing); not drop-in due to pin count and enable requirement. | Select when >50mA output or controlled enable functionality is needed; verify PCB layout compatibility. |
| AP7361D-50SG-7 | 5.0V output, 300mA rating, 120μA IQ, SOT23-3 package, ±2% accuracy - higher IQ, wider tolerance, same pinout. | Acceptable where tighter output accuracy is not critical and higher quiescent current is tolerable. | Choose for cost-sensitive non-safety applications; avoid in always-on modules requiring sub-70μA IQ. |
Compared with TLV73350PDBVR and AP7361D-50SG-7, ZMR500QFTA offers the lowest quiescent current in a true 3-pin SOT23 footprint and AEC-Q100 Grade 1 compliance - making it optimal for space- and power-constrained automotive sensors where pin count and qualification are decisive.
Availability
ZMR500QFTA is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, ADAS camera systems, and telematics control units requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for ZMR500QFTA 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 automotive, industrial, and consumer markets.
ZMR500QFTA belongs to the ZMR automotive LDO series, designed specifically for robust, low-power point-of-load regulation in harsh-temperature automotive environments - emphasizing AEC-Q100 compliance, minimal external components, and ultra-low IQ.
FAQ
Is ZMR500QFTA stable without an output capacitor?
Yes. The ZMR500QFTA is unconditionally stable and does not require an external output capacitor for stability, as confirmed in the DS37014 datasheet Section 1. This eliminates BOM cost and PCB area typically needed for ceramic stabilization caps in other LDOs.
What is the minimum input voltage required for regulation at full load?
The datasheet specifies a minimum input voltage of 6.7V to maintain 5.0V regulation at all temperatures and loads. At 50mA output and +125°C, headroom remains sufficient to sustain regulation without dropout, though exact dropout voltage is not characterized separately.
Does ZMR500QFTA support reverse polarity protection?
No. The device lacks integrated reverse-voltage protection; applying reversed input voltage may cause permanent damage. External protection (e.g., series Schottky diode or ideal diode controller) is required if reverse-battery events are possible in the system.
Can ZMR500QFTA be used in non-automotive applications?
Yes. While AEC-Q100 qualified and optimized for automotive, its electrical specs - including -40°C to +125°C operation, low IQ, and high PSRR - make it suitable for industrial IoT sensors, medical portable devices, and aerospace subsystems where reliability and low power are critical.
ZMR500QFTA 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):
- 25V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 50mA
- Current - Quiescent (Iq):
- 70 µA
- Current - Supply (Max):
- -
- PSRR:
- 72dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ZMR500QFTA FAQ
1.How can I place an order for ZMR500QFTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZMR500QFTA 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 ZMR500QFTA reliable?
The price and inventory of ZMR500QFTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZMR500QFTA is usually 5 days.
3.What payment methods are accepted for ZMR500QFTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZMR500QFTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZMR500QFTA?
ZMR500QFTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZMR500QFTA 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 ZMR500QFTA?
For technical support, including ZMR500QFTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZMR500QFTA requirements.
6.How does Aetrix verify that ZMR500QFTA is sourced from the original manufacturer or authorized distributors?
All ZMR500QFTA 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 ZMR500QFTA meets industry standards.
7.What is the process for return or replacement of ZMR500QFTA?
All ZMR500QFTA units undergo pre-shipment inspection (PSI). If there is an issue with ZMR500QFTA, 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 ZMR500QFTA part is unused and in its original packaging.
Return procedure for ZMR500QFTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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