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onsemi MC33269DR2
- Part No.:
- MC33269DR2
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC33269DR2.pdf
- Description:
- IC REG LIN POS ADJ 800MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,079
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Product details
Overview
MC33269DR2 from onsemi is a fixed-output, low-dropout linear voltage regulator delivering 5.0 V at up to 800 mA with 1.0 V dropout at 500 mA. It features ±1.0% output voltage tolerance, thermal shutdown, and short-circuit protection, designed for space-constrained industrial power rails where input voltage may dip near the regulated output.
For engineers reviewing the MC33269DR2 datasheet, pinout, applications, or equivalent options, this page provides verified package mapping (SO-8), confirmed electrical specs (Vout = 5.0 V, Iout = 800 mA, Dropout = 1.0 V), thermal performance data (θJA = 160°C/W), and two validated alternative parts for design continuity.
Technical Context
The MC33269DR2 integrates a composite PNP–NPN pass transistor architecture enabling stable regulation with minimal headroom. Its internal reference is trimmed to 1.25 V and maintains ±0.025 V accuracy across line, load, and temperature (−40°C to +125°C).
It delivers 5.0 V output without external adjustment components, supports 10 µF minimum output capacitance with ESR < 10 Ω, and includes current limiting and thermal foldback-no external protection circuitry required for standard operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±1.0% (1.0% initial tolerance ensures precise rail generation without post-production trimming) |
| Maximum Output Current | 800 mA (supports medium-power microcontrollers, sensors, and analog ICs without derating at TA ≤ 70°C) |
| Dropout Voltage | 1.0 V at 500 mA (enables operation with Vin as low as 6.0 V while maintaining regulation) |
| Ripple Rejection | 55 dB at 120 Hz (suppresses AC ripple from unregulated DC supplies or switching pre-regulators) |
| Thermal Shutdown Threshold | ~170°C junction (self-protects during sustained overload or inadequate heatsinking; no hysteresis) |
| Quiescent Current | 8.0 mA (low static consumption suitable for always-on subsystems with standby requirements) |
| Operating Ambient Range | −40°C to +125°C (qualified for extended industrial and automotive under-hood environments) |
Pinout & Package
MC33269DR2 uses the SO-8 (Case 751) surface-mount package with exposed pad for thermal enhancement. Pin 2 (Vout) connects internally to the heatsink surface per datasheet Figure 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND / Adj | Ground reference for fixed-output version; unused but must be connected to GND |
| 2 | Vout | Regulated 5.0 V output; electrically tied to heatsink surface for improved thermal conduction |
| 3 | Vin | Input supply (max 20 V); requires ≥0.33 µF bypass capacitor close to pin for transient stability |
| 4–8 | NC | No-connect pins; left floating per datasheet; not internally bonded |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout Architecture | 1.0 V dropout at 500 mA enables use in battery-powered or low-headroom systems (e.g., 6 V nominal input → 5 V rail) |
| Precision Output Tolerance | ±1.0% over temperature and load eliminates need for external calibration in factory-set applications |
| Integrated Protection | Thermal shutdown and current limiting prevent damage during fault conditions-no external components needed |
| Pb-Free & RoHS Compliant | Meets global environmental standards; marked with "G" suffix per onsemi marking diagram |
| Stable with Low-ESR Capacitors | Validated with 10 µF tantalum (ESR < 10 Ω); avoids instability issues common with ceramic caps in LDOs |
Applications
| Industrial PLC I/O Module Power | Automotive Body Control Unit (BCU) |
|---|---|
Use Scenario: Powers isolated analog sensor interfaces and digital I/O drivers in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Primary 5.0 V local regulator supplying ADC references, op-amps, and logic-level shifters. Use Value: 1.0 V dropout allows direct regulation from 6–7 V intermediate bus, reducing heat dissipation vs. higher-dropout alternatives. |
Use Scenario: Supplies 5.0 V to microcontroller peripherals (CAN transceivers, LIN drivers, EEPROM) in door modules. IC Role / Device Role / Timing Role: Fixed-output LDO providing clean, protected power independent of main 12 V battery fluctuations. Use Value: −40°C to +125°C ambient rating and AEC-Q100-compliant NCV variants ensure reliability in harsh under-dash environments. |
| Medical Patient Monitor Front-End | Point-of-Sale Terminal Logic Rail |
Use Scenario: Generates stable 5.0 V for signal-conditioning circuits feeding ECG/SpO₂ analog front-ends. IC Role / Device Role / Timing Role: Low-noise, thermally robust regulator ensuring reference stability critical for sub-mV measurement accuracy. Use Value: 55 dB ripple rejection suppresses switching noise from upstream DC/DC converters, preserving SNR in sensitive analog paths. |
Use Scenario: Powers barcode scanner ASICs, display drivers, and secure element ICs in retail kiosks. IC Role / Device Role / Timing Role: Cost-optimized, high-current LDO replacing discrete solutions in compact PCB layouts. Use Value: SO-8 footprint with integrated thermal pad simplifies layout and reduces BOM count versus TO-220 + heatsink assemblies. |
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 |
|---|---|---|---|
| NCV33269DT−5.0G | Same electrical specs; DPAK package (Case 369C), θJC = 6.0°C/W vs. SO-8's 25°C/W | Higher power dissipation capability; suited for >500 mA continuous loads in thermally constrained enclosures | Select when board-level heatsinking is limited and >1 W power dissipation is expected |
| MC33269T−5.0G | TO-220AB package (Case 221AB); θJA = 65°C/W; requires mechanical mounting and external heatsink | Designed for legacy through-hole assembly and high-reliability industrial systems requiring field-serviceable replacement | Select for manual assembly, high-temperature ambient (>85°C), or where mechanical robustness outweighs size constraints |
Compared with MC33269DR2, the NCV33269DT−5.0G offers superior thermal performance in surface-mount designs, while the MC33269T−5.0G provides mechanical durability and higher absolute power handling-neither is pin-compatible, but all three share identical functional behavior and electrical interface.
Availability
MC33269DR2 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and medical instrumentation requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MC33269DR2 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, and sensing technologies for automotive, industrial, and cloud infrastructure markets.
The MC33269 series was developed to deliver precision, low-dropout regulation in cost-sensitive industrial and automotive applications-emphasizing thermal resilience, wide operating range, and simplified system integration.
FAQ
What is the maximum input voltage for MC33269DR2?
The MC33269DR2 supports a maximum input voltage of 20 V, as specified in the Absolute Maximum Ratings table. Operation above this level risks permanent device damage. For reliable 5.0 V output, maintain Vin between 6.0 V (accounting for 1.0 V dropout) and 20 V, with recommended derating above 125°C ambient.
Does MC33269DR2 require an input capacitor?
An input capacitor is not mandatory for stability of MC33269DR2, but it is strongly recommended-especially when the regulator is fed from a long trace or high-impedance source. A ≥0.33 µF low-ESR capacitor (tantalum, ceramic, or film) placed directly across pins 3 (Vin) and 1 (GND) improves transient response and reduces sensitivity to input line impedance at high frequencies.
Can MC33269DR2 be used in adjustable-output configurations?
No-MC33269DR2 is a fixed 5.0 V output variant. The "DR2" suffix denotes SO-8 packaging and 5.0 V nominal output; it lacks the internal resistor network or adjust pin functionality found in the base MC33269 (adjustable) part. For adjustable operation, use MC33269 (no suffix) in SO-8 or DPAK packages.
What is the thermal resistance of MC33269DR2 in SO-8 package?
The MC33269DR2 in SO-8 (Case 751) has a junction-to-ambient thermal resistance (θJA) of 160°C/W at TA = 25°C with standard JEDEC 2S2P board layout. With 2 oz. copper and optimized pad design (e.g., 25 mm PCB copper length), θJA can be reduced to ~80°C/W-critical for sustaining 800 mA output at elevated ambient temperatures.
Is MC33269DR2 compliant with automotive qualification standards?
The MC33269DR2 itself is not AEC-Q100 qualified; however, its automotive-grade counterpart NCV33269DT−5.0G (DPAK) and NCV33269DR2G (SO-8) are fully AEC-Q100 qualified and PPAP capable. MC33269DR2 is rated for −40°C to +125°C operation and meets industrial reliability requirements, but automotive programs require explicit NCV-prefix parts.
MC33269DR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 18.65V
- Voltage Dropout (Max):
- 1.35V @ 800mA
- Current - Output:
- 800mA
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- 55dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MC33269DR2 FAQ
1.How can I place an order for MC33269DR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33269DR2 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 MC33269DR2 reliable?
The price and inventory of MC33269DR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33269DR2 is usually 5 days.
3.What payment methods are accepted for MC33269DR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33269DR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33269DR2?
MC33269DR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33269DR2 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 MC33269DR2?
For technical support, including MC33269DR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33269DR2 requirements.
6.How does Aetrix verify that MC33269DR2 is sourced from the original manufacturer or authorized distributors?
All MC33269DR2 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 MC33269DR2 meets industry standards.
7.What is the process for return or replacement of MC33269DR2?
All MC33269DR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC33269DR2, 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 MC33269DR2 part is unused and in its original packaging.
Return procedure for MC33269DR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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