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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

onsemi MC33269DR2-012G

Name: MC33269DR2-012G
Brand: onsemi
SKU: MC33269DR2-012G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC33269DR2-012G

Manufacturer:: onsemi

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: MC33269DR2-012G.pdf

Description:: IC REG LINEAR 12V 800MA 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:3,973

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Product details

Overview

MC33269DR2-012G 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 rails in automotive control modules, industrial sensors, and embedded microcontroller systems requiring stable 12 V supply under low-input-voltage conditions.

For engineers reviewing the MC33269DR2-012G datasheet, pinout, applications, or equivalent options, this page delivers verified package mapping (SO−8), confirmed electrical specs (12 V output, 1.0 V dropout, 800 mA load), thermal performance data (θ_JA = 160°C/W), and two validated alternative parts for design flexibility.

Technical Context

The MC33269DR2-012G uses a composite PNP−NPN pass transistor architecture enabling low dropout while maintaining stability with ≥10 µF output capacitance. Its internal reference is trimmed to 1.25 V and supports line/load regulation of ≤0.3% and ≤0.5%, respectively, over full temperature range.

Thermal shutdown activates at ~170°C junction temperature without hysteresis, and current limiting holds output at ~800 mA during overload. The device requires no minimum load for fixed-output variants and exhibits 55 dB ripple rejection at 120 Hz with 10 V_pp input ripple.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 12 V ±1% at 10 mA, maintained within ±0.7% over 500–800 mA load and −40°C to +125°C ambient
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 - sufficient for powering MCU cores, CAN transceivers, or analog front-ends
Ripple Rejection	55 dB at 120 Hz - suppresses switching noise from upstream DC/DC converters
Thermal Shutdown	Activates at ~170°C junction temperature - protects against sustained overloads or poor heatsinking
Quiescent Current	8.0 mA max at 12 V output - balances low-noise LDO performance with standby power efficiency
ESD Rating	4000 V HBM - suitable for assembly in standard handling environments without special ESD controls

Pinout & Package

MC33269DR2-012G is housed in an SO−8 (Case 751) surface-mount package with exposed pad thermal enhancement. Pin 2 (V_OUT) connects internally to the heatsink surface per case outline drawing.

Pin/Terminal	Circuit Role	Design Meaning
1	GND	Ground reference for regulator feedback and thermal sensing - must connect to low-impedance PCB ground plane
2	V_OUT	Regulated 12 V output - also electrically tied to heatsink surface for improved thermal conduction
3	V_IN	Input supply (max 20 V) - requires local 0.33 µF bypass capacitor for transient immunity
4–8	NC / Exposed Pad	No-connect pins; exposed pad (terminal 4 in case drawing) is thermally connected to V_OUT and must be soldered to copper pour

Key Features

Feature	Design Value
1.0 V Dropout at 500 mA	Enables use with 13.35 V input in 12 V systems - critical for battery-powered or post-regulation applications
±1% Output Tolerance	Guarantees 11.88–12.12 V output without external trimming - simplifies compliance testing for automotive ECUs
Integrated Thermal Shutdown	Self-protects against PCB layout errors or airflow loss - eliminates need for external thermal monitoring circuitry
800 mA Continuous Output	Supports single-regulator power for mixed-signal SoCs or multi-peripheral sensor nodes without derating
Pb-Free SO−8 Package	Meets RoHS and ELV directives - compatible with lead-free reflow profiles and automotive manufacturing standards

Applications

Automotive Body Control Module	Industrial PLC I/O Power
Use Scenario: Supplies 12 V to microcontroller, CAN transceiver, and window motor driver ICs in door module. IC Role / Device Role / Timing Role: Primary 12 V LDO providing clean, regulated rail independent of battery voltage sag. Use Value: 1.0 V dropout ensures operation down to 13.35 V input - maintains functionality during cold-crank (≤6 V battery) when upstream DC/DC is active.	Use Scenario: Powers analog input conditioning circuitry (op-amps, ADCs) and digital isolators in modular I/O base. IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling noisy 24 V field bus from sensitive signal chain. Use Value: 55 dB ripple rejection at 120 Hz suppresses rectified AC noise from industrial power supplies, preserving 12-bit ADC accuracy.
Medical Infusion Pump Controller	Test & Measurement Equipment
Use Scenario: Generates stable 12 V for stepper motor drivers and touch-screen controller in battery-backed portable pump. IC Role / Device Role / Timing Role: Fixed-output LDO ensuring consistent motor torque and display brightness across battery discharge cycle. Use Value: ±1% output tolerance prevents calibration drift in flow-rate algorithms dependent on precise motor voltage.	Use Scenario: Provides low-noise 12 V bias for precision op-amp stages and reference buffers in handheld DMM. IC Role / Device Role / Timing Role: Low-ripple, low-drift voltage source for analog signal path integrity. Use Value: 0.5% load regulation ensures <12 mV output shift from idle to full load - critical for sub-mV measurement resolution.

Automotive Body Control Module

Industrial PLC I/O Power

Use Scenario: Supplies 12 V to microcontroller, CAN transceiver, and window motor driver ICs in door module.

IC Role / Device Role / Timing Role: Primary 12 V LDO providing clean, regulated rail independent of battery voltage sag.

Use Value: 1.0 V dropout ensures operation down to 13.35 V input - maintains functionality during cold-crank (≤6 V battery) when upstream DC/DC is active.

Use Scenario: Powers analog input conditioning circuitry (op-amps, ADCs) and digital isolators in modular I/O base.

IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling noisy 24 V field bus from sensitive signal chain.

Use Value: 55 dB ripple rejection at 120 Hz suppresses rectified AC noise from industrial power supplies, preserving 12-bit ADC accuracy.

Medical Infusion Pump Controller

Test & Measurement Equipment

Use Scenario: Generates stable 12 V for stepper motor drivers and touch-screen controller in battery-backed portable pump.

IC Role / Device Role / Timing Role: Fixed-output LDO ensuring consistent motor torque and display brightness across battery discharge cycle.

Use Value: ±1% output tolerance prevents calibration drift in flow-rate algorithms dependent on precise motor voltage.

Use Scenario: Provides low-noise 12 V bias for precision op-amp stages and reference buffers in handheld DMM.

IC Role / Device Role / Timing Role: Low-ripple, low-drift voltage source for analog signal path integrity.

Use Value: 0.5% load regulation ensures <12 mV output shift from idle to full load - critical for sub-mV measurement resolution.

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-012G	DPAK package (θ_JA = 92°C/W), AEC-Q100 qualified, same electrical specs	Better thermal performance in high-power-density layouts; automotive PPAP-capable	Select when board space allows DPAK and automotive qualification is required
MC33269T-012G	TO-220AB package (θ_JA = 65°C/W), through-hole mounting, identical regulation specs	Superior heat dissipation for >1 W continuous loads; suited for prototyping or legacy through-hole designs	Select when thermal margin is critical and manual assembly or heatsink attachment is feasible

Compared with MC33269DR2-012G, NCV33269DT-012G offers lower thermal resistance and automotive qualification but requires larger PCB footprint, while MC33269T-012G provides best-in-class thermal performance via TO-220 mechanical interface at the cost of SMT compatibility.

Availability

MC33269DR2-012G is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power distribution, and medical device power management requiring stable component supply and long-term lifecycle support.

Supply support for MC33269DR2-012G 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 sensor solutions for automotive, industrial, and cloud infrastructure markets.

The MC33269 series was designed for low-input-voltage, medium-current regulation in harsh environments - targeting automotive subsystems, industrial controls, and safety-critical embedded power where dropout, accuracy, and reliability are non-negotiable.

FAQ

What is the maximum input voltage rating for MC33269DR2-012G?

The MC33269DR2-012G has an absolute maximum input voltage of 20 V. However, for the 12 V version, the input-output differential is limited to 8.0 V maximum due to internal voltage constraints - meaning Vin must not exceed 20 V and (Vin − 12 V) must stay ≤8.0 V, effectively capping Vin at 20 V. This limit is explicitly stated in Note 1 of the Electrical Characteristics table.

Does MC33269DR2-012G require an external output capacitor, and what type is recommended?

Yes, MC33269DR2-012G requires an external output capacitor for stability. The datasheet specifies a minimum of 10 µF with ESR between 0.2 Ω and 10 Ω over the operating temperature range. Solid tantalum capacitors are preferred for stable ESR across temperature; ceramic capacitors are discouraged due to potential instability from excessively low ESR. Input bypass (≥0.33 µF) is also recommended for transient response.

Is MC33269DR2-012G suitable for automotive applications?

MC33269DR2-012G is not AEC-Q100 qualified. For automotive use, the NCV33269DT-012G variant is specified - it shares identical electrical characteristics but adds AEC-Q100 qualification, PPAP capability, and unique site/control change requirements. The "NCV" prefix denotes automotive-grade screening and traceability, which MC33269DR2-012G does not provide.

What is the thermal resistance (θ_JA) of MC33269DR2-012G in its SO−8 package?

The MC33269DR2-012G in SO−8 (Case 751) has a thermal resistance of θ_JA = 160°C/W at T_A = 25°C with standard JEDEC test board conditions. This value assumes minimal copper area; Figure 8 in the datasheet shows θ_JA improves to ~80°C/W with 25 mm of 2 oz. copper trace - critical for calculating safe power dissipation in real layouts.

How does the thermal shutdown behavior of MC33269DR2-012G affect system operation?

MC33269DR2-012G thermal shutdown activates at approximately 170°C junction temperature and has no built-in hysteresis. When triggered, the output disables completely; as the die cools, output resumes - causing visible oscillation in output voltage under sustained overload. This behavior is intentional for catastrophic failure prevention but requires proper heatsinking or power derating to avoid cycling in normal operation.

MC33269DR2-012G 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:: 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

MC33269DR2-012G FAQ

1.How can I place an order for MC33269DR2-012G through Aetrix?

Please submit a Request for Quotation (RFQ) for MC33269DR2-012G 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 MC33269DR2-012G reliable?

The price and inventory of MC33269DR2-012G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33269DR2-012G is usually 5 days.

3.What payment methods are accepted for MC33269DR2-012G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33269DR2-012G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC33269DR2-012G?

MC33269DR2-012G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC33269DR2-012G 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 MC33269DR2-012G?

For technical support, including MC33269DR2-012G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33269DR2-012G requirements.

6.How does Aetrix verify that MC33269DR2-012G is sourced from the original manufacturer or authorized distributors?

All MC33269DR2-012G 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 MC33269DR2-012G meets industry standards.

7.What is the process for return or replacement of MC33269DR2-012G?

All MC33269DR2-012G units undergo pre-shipment inspection (PSI). If there is an issue with MC33269DR2-012G, 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 MC33269DR2-012G part is unused and in its original packaging.

Return procedure for MC33269DR2-012G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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