My Inquiry
My Account
onsemi MC33269D-012
- Part No.:
- MC33269D-012
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC33269D-012.pdf
- Description:
- IC REG LINEAR 12V 800MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,660
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MC33269D-012 from onsemi is a fixed-output, low-dropout linear voltage regulator delivering 12 V at up to 800 mA with 1.0 V dropout at 500 mA, ±1% output tolerance, and integrated thermal/short-circuit protection. It operates across −40°C to +125°C and targets power-sensitive industrial control, automotive subsystems, and embedded sensor interfaces requiring stable 12 V rail generation from marginal input sources.
For engineers reviewing the MC33269D-012 datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage under load, thermal resistance in DPAK package, output tolerance over temperature, and compatibility with 10 µF minimum output capacitor for stability.
Technical Context
The MC33269D-012 uses a composite PNP–NPN pass transistor architecture enabling 1.0 V dropout at 500 mA while maintaining regulation down to 1.35 V differential at full 800 mA load. Its internal reference is trimmed to 1.25 V with ±0.025 V variation over line, load, and temperature.
Protection circuitry includes foldback current limiting triggered above 800 mA and thermal shutdown activating at ~170°C junction temperature without hysteresis-requiring external heatsinking for sustained high-power operation in TO-220 or DPAK packages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12.0 V ±1.0% at 10 mA, ±1.2% over line/load/temperature (11.76–12.24 V) |
| Dropout Voltage | 1.0 V typical at 500 mA; max 1.35 V at 800 mA - enables operation with Vin as low as 13.35 V |
| Output Current | ≥800 mA continuous - supports moderate-power analog/digital loads without external boost |
| Line Regulation | ≤0.3% - ensures <±36 mV output shift when input varies from (Vout+1.5 V) to 20 V |
| Ripple Rejection | 55 dB at 120 Hz - suppresses 10 Vpp input ripple to ≤1.8 mVpp at output |
| Quiescent Current | 8.0 mA max at 12 V output - minimizes no-load power loss in battery-backed systems |
| Thermal Resistance (DPAK) | 6.0°C/W junction-to-case - requires ≥25 mm² copper pad for 1 W dissipation at TA=50°C |
Pinout & Package
DPAK (TO-252-3) package with exposed thermal pad connected internally to Pin 2 (Vout). Heatsink surface is electrically tied to output terminal for simplified thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal bias and feedback network; must be low-impedance connection |
| 2 | Vout | Regulated 12 V output; also connects to exposed thermal pad for heat conduction |
| 3 | Vin | Input supply (max 20 V); requires local 0.33 µF bypass capacitor for transient immunity |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout Architecture | 1.0 V dropout at 500 mA enables use with 13.0 V nominal inputs (e.g., automotive battery during cranking) |
| Precision Output Tolerance | ±1.0% initial tolerance reduces need for post-production calibration in 12 V sensor signal chains |
| Integrated Protection | Thermal shutdown and foldback current limiting prevent damage during overload or poor heatsinking |
| Stable with Low-ESR Capacitors | Compatible with 10 µF tantalum or electrolytic output caps (ESR 0.2–10 Ω), easing BOM sourcing |
| Automotive-Qualified Variant | NCV33269DTRK−012 version available AEC-Q100 qualified for under-hood applications |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Powering isolated analog input channels and digital logic in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Primary 12 V LDO supplying ADC references, op-amps, and level-shifters with minimal noise coupling. Use Value: 55 dB ripple rejection maintains <1.8 mVpp noise on 12 V rail, preserving 12-bit ADC accuracy without additional filtering. | Use Scenario: Regulating 12 V for door module microcontrollers, window motor drivers, and LED lighting controls. IC Role / Device Role / Timing Role: Fixed-output LDO converting battery voltage to stable 12 V for MCU peripherals and CAN transceivers. Use Value: 1.0 V dropout allows operation during cold-cranking (battery dips to 6–8 V) when paired with upstream buck converter. |
| Medical Patient Monitor Sensor Interface | Test & Measurement Equipment Power Rail |
Use Scenario: Providing clean 12 V bias to precision pressure and temperature transducers in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-noise voltage source for analog front-end signal conditioning stages. Use Value: ±1.2% output variation over −40°C to +125°C ensures transducer excitation remains within calibration limits across environmental stress tests. | Use Scenario: Generating auxiliary 12 V rail for op-amp-based signal generators and oscilloscope front-ends. IC Role / Device Role / Timing Role: Secondary regulator decoupling noisy switching supplies from sensitive analog circuitry. Use Value: Foldback current limiting prevents latch-up during probe short-circuits, enabling safe field serviceability without fuse replacement. |
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 |
|---|---|---|---|
| LM2940CT-12/NOPB | Higher 0.5 V dropout at 100 mA; 100 mA lower max output current (700 mA); SOIC-8 only | Limited to lower-power applications; less suitable for 800 mA continuous loads | Select if footprint compatibility with legacy LM2940 designs is required and load current stays below 700 mA |
| TLV1117-12CDCYR | Lower 1.2 V dropout at 800 mA; SOT-223 package; 1% tolerance but higher quiescent current (10 mA) | Better thermal performance in SOT-223; not rated for automotive temp range (−40°C to +125°C) | Prefer for space-constrained PCBs where ambient temperature stays ≤85°C and 12 V rail stability is critical |
Compared with LM2940CT-12/NOPB and TLV1117-12CDCYR, MC33269D-012 uniquely balances 800 mA output, 1.0 V dropout, and extended temperature range in DPAK-making it optimal for industrial and automotive environments demanding robustness at moderate power levels.
Availability
MC33269D-012 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and medical sensor interfaces requiring stable component supply with long-term lifecycle support.
Supply support for MC33269D-012 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, sensors, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The MC33269 series was designed for cost-sensitive, medium-current linear regulation in low-input-voltage systems-emphasizing dropout performance, thermal resilience, and AEC-Q100 compliance for harsh-environment applications.
FAQ
What is the maximum input voltage rating for MC33269D-012?
The MC33269D-012 has an absolute maximum input voltage of 20 V. However, due to its 12 V output, the input-output differential must not exceed 8.0 V per datasheet Note 1-limiting practical Vin to ≤20 V but recommending ≤20 V with derated power dissipation above 13.35 V to avoid thermal overload.
Does MC33269D-012 require an external output capacitor, and what type is recommended?
Yes, MC33269D-012 requires a minimum 10 µF output capacitor with ESR between 0.2 Ω and 10 Ω for stability. Solid tantalum capacitors are preferred over aluminum electrolytic for wide-temperature operation, while low-ESR ceramic capacitors are discouraged due to potential oscillation.
What is the thermal shutdown behavior of MC33269D-012?
MC33269D-012 activates thermal shutdown at approximately 170°C junction temperature with no hysteresis. When triggered, the output disables completely; as junction temperature falls, output resumes-potentially causing visible oscillation if overheating persists. Proper heatsinking is mandatory for sustained >1 W power dissipation.
Can MC33269D-012 be used in adjustable-output configurations?
No-MC33269D-012 is a fixed 12 V output variant. The adjustable version is designated MC33269 (no suffix) or MC33269DT, which uses the GND/Adj pin for external resistor feedback. Using MC33269D-012 in adjustable mode will result in incorrect output voltage and instability.
Is MC33269D-012 RoHS compliant and lead-free?
Yes, MC33269D-012 is Pb-free and RoHS compliant, indicated by the "G" suffix in ordering codes (e.g., MC33269DTRKG) and explicitly stated in the datasheet's "Pb-Free Devices" feature list and marking diagrams.
MC33269D-012 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 12V
- Voltage - Output (Max):
- -
- 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
MC33269D-012 FAQ
1.How can I place an order for MC33269D-012 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33269D-012 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 MC33269D-012 reliable?
The price and inventory of MC33269D-012 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33269D-012 is usually 5 days.
3.What payment methods are accepted for MC33269D-012?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33269D-012 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33269D-012?
MC33269D-012 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33269D-012 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 MC33269D-012?
For technical support, including MC33269D-012 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33269D-012 requirements.
6.How does Aetrix verify that MC33269D-012 is sourced from the original manufacturer or authorized distributors?
All MC33269D-012 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 MC33269D-012 meets industry standards.
7.What is the process for return or replacement of MC33269D-012?
All MC33269D-012 units undergo pre-shipment inspection (PSI). If there is an issue with MC33269D-012, 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 MC33269D-012 part is unused and in its original packaging.
Return procedure for MC33269D-012:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MC33269D-012 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
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
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…
