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onsemi MC33375D-3.3R2G
- Part No.:
- MC33375D-3.3R2G
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC33375D-3.3R2G.pdf
- Description:
- IC REG LINEAR 3.3V 300MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,124
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Product details
Overview
MC33375D-3.3R2G from onsemi is a micropower, low-dropout linear voltage regulator delivering a fixed 3.3 V output at up to 300 mA, housed in an SOIC-8 (Case 751) package with Pb-free finish. It features logic-level ON/OFF control, 260 mV dropout at full load, 125 µA quiescent current in active mode, and internal thermal/current limiting - ideal for battery-powered industrial sensors and portable instrumentation requiring stable low-noise supply.
For engineers reviewing the MC33375D-3.3R2G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout performance at 300 mA, ON/OFF control interface compatibility, thermal derating in SOIC-8 layout, and stability with ≥0.33 µF ceramic output capacitance.
Technical Context
The MC33375D-3.3R2G uses a PNP pass transistor architecture enabling ultra-low dropout (25 mV at 10 mA; 260 mV at 300 mA) and tight line/load regulation (<10 mV). Its ON/OFF control pin accepts TTL/CMOS-compatible logic levels (VCTRL = 0.3 V max for OFF, 2.4 V min for ON), directly disabling the output without external circuitry.
Thermal protection activates at 150 °C with no hysteresis, causing output oscillation until junction cooling occurs. Current limiting caps output at ~450 mA, independent of input voltage, and the device remains stable with minimal 0.33 µF output capacitance for 3.3 V versions - reducing BOM count and PCB area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.30 V ±2% over −40 °C to +125 °C - ensures reliable microcontroller I/O and analog sensor biasing across automotive and industrial temperature ranges. |
| Max Output Current | 300 mA continuous - sufficient to power ARM Cortex-M0+ MCUs, RS-485 transceivers, or multi-sensor nodes without external boost stages. |
| Dropout Voltage | 260 mV at 300 mA - enables operation from 3.56 V input (e.g., single LiFePO₄ cell or regulated 3.6 V rail) while maintaining regulation. |
| Quiescent Current | 125 µA typical in ON mode; 0.3 µA in OFF mode - extends battery life in always-on wake-up circuits and low-duty-cycle IoT endpoints. |
| Line Regulation | 2.0 mV typical (Vin = VO+1 V to 12 V) - minimizes output drift during input ripple or battery discharge, critical for precision ADC references. |
| Ripple Rejection | 65 dB at 120 Hz - suppresses switching converter noise upstream, reducing need for additional LC filtering in mixed-signal systems. |
| Thermal Shutdown | 150 °C junction - protects against sustained overload or poor heatsinking in enclosed enclosures without external thermal monitoring. |
Pinout & Package
MC33375D-3.3R2G is packaged in SOIC-8 (Case 751), with exposed pad not electrically connected. The package supports standard reflow profiles and offers RJA = 160 °C/W (no copper pour) and RJC = 25 °C/W, enabling >300 mA operation with modest PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input (Vin) | Main power input; must be ≥ (3.3 V + dropout) and ≤13 V DC; requires local 0.33 µF bypass capacitor. |
| 2 | GND | Analog ground reference; connects internally to substrate and thermal pad; must tie to low-impedance system ground plane. |
| 3 | GND | Second ground terminal - reduces ground loop impedance and improves PSRR; connect directly to same ground net as Pin 2. |
| 4 | ON/OFF | Active-low enable: <0.5 V = output disabled; >2.4 V = output enabled; must not float - pull high via resistor if unused. |
| 5 | GND | Third ground terminal - further lowers ground path resistance; all GND pins must be shorted on PCB. |
| 6 | GND | Fourth ground terminal - completes low-inductance return path for output current; essential for EMI control. |
| 7 | Output (Vout) | Regulated 3.3 V output; requires ≥0.33 µF ceramic capacitor placed within 5 mm of pin; ESR <1 Ω recommended. |
| 8 | NC | No connect - left unconnected per datasheet; not internally bonded; avoid routing traces or vias to this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Logic-level ON/OFF control | Direct interface to MCU GPIOs without level-shifting; eliminates external MOSFET or buffer in power sequencing designs. |
| Stable with 0.33 µF output cap | Reduces bill-of-materials cost and board space vs. LDOs requiring ≥10 µF tantalum; compatible with low-ESR X7R/X5R ceramics. |
| 2% output tolerance over full temp range | Guarantees consistent logic-level compatibility and ADC reference accuracy without post-production calibration. |
| Internal current limit (450 mA) | Prevents damage during short-circuit events without external foldback circuitry; enables robust field-deployed equipment. |
| Pb-free SOIC-8 package | Meets RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 3 (MSL3), simplifying global manufacturing compliance. |
Applications
| Industrial Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered wireless temperature/humidity node with BLE MCU, analog front-end, and EEPROM. IC Role / Device Role / Timing Role: Primary 3.3 V supply for MCU core, RF transceiver, and precision ADC reference. Use Value: 125 µA quiescent current extends 2×AA battery life to >2 years in sleep mode; 260 mV dropout allows operation down to 3.56 V input. |
Use Scenario: Handheld pulse oximeter using optical sensors, analog signal chain, and LCD display. IC Role / Device Role / Timing Role: Clean, low-noise 3.3 V rail for photodiode amplifier and SAR ADC sampling clock domain. Use Value: 65 dB ripple rejection attenuates switching noise from DC-DC converter powering display backlight, preserving SNR. |
| Automotive Body Control Module | Smart Home Hub Controller |
Use Scenario: Low-power door module with LIN transceiver, window motor driver, and status LEDs. IC Role / Device Role / Timing Role: Secondary regulated supply for LIN PHY and microcontroller I/O banks. Use Value: AEC-Q100 qualified NCV variants available; thermal shutdown prevents latch-up during load dump transients. |
Use Scenario: Wi-Fi/Zigbee gateway with multi-core SoC, USB peripherals, and real-time clock backup. IC Role / Device Role / Timing Role: Standby power rail for RTC and wake-on-LAN circuitry when main SoC is powered down. Use Value: 0.3 µA OFF-mode current eliminates parasitic drain on coin-cell backup; ON/OFF pin synchronizes with host sleep states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV33375D-3.3R2G | Automotive-grade variant with AEC-Q100 qualification, PPAP support, and extended process controls; identical electrical specs and pinout. | Required for under-hood or safety-critical automotive modules where qualification documentation and traceability are mandatory. | Select when automotive qualification, change control, or zero-defect requirements apply - otherwise MC33375D-3.3R2G is functionally identical. |
| MCP1700T-3302E/OT | 250 mA max output, 6 µA quiescent current (ON), SOT-23-5 package; lower current but significantly lower IQ; no ON/OFF pin - always-on. | Suitable for ultra-low-power sensor nodes where 300 mA headroom is unnecessary and ON/OFF control is handled externally. | Choose for sub-1 µA system sleep current targets; avoid if >250 mA load or integrated enable functionality is required. |
Compared with NCV33375D-3.3R2G, the MC33375D-3.3R2G offers identical performance without automotive documentation overhead; versus MCP1700T-3302E/OT, it trades higher quiescent current for 300 mA capability and built-in logic-controlled enable - critical for dynamic power gating.
Availability
MC33375D-3.3R2G is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, and smart home controllers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MC33375D-3.3R2G 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, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The MC33375 series was designed specifically for battery-powered and thermally constrained applications demanding micropower operation, low dropout, and integrated protection - targeting portable instrumentation, automotive body electronics, and industrial IoT edge nodes.
FAQ
What is the maximum input voltage rating for MC33375D-3.3R2G?
The MC33375D-3.3R2G has an absolute maximum input voltage of 13 V DC. Exceeding this may cause permanent damage. For reliable operation, Vin should remain ≤12 V under all conditions including transients. The regulator maintains regulation down to Vin = Vout + dropout (e.g., 3.56 V at 300 mA), making it suitable for single-cell LiFePO₄ or regulated 5 V rails.
Does MC33375D-3.3R2G require an external capacitor on the ON/OFF pin?
No, the MC33375D-3.3R2G does not require an external capacitor on the ON/OFF pin. However, the pin must never be left floating - it must be actively driven high (≥2.4 V) to enable regulation or pulled low (≤0.5 V) to disable output. A 10 kΩ pull-up resistor to Vin is recommended if controlled solely by a microcontroller GPIO.
Can MC33375D-3.3R2G operate with a 0.22 µF output capacitor?
No - the MC33375D-3.3R2G requires a minimum of 0.33 µF ceramic output capacitance for stability with its 3.3 V output version. Only the 5.0 V variants are specified for 0.22 µF. Using 0.22 µF risks oscillation or poor transient response; 1.0 µF X7R ceramic is commonly used for margin and improved load step immunity.
What is the thermal resistance (RJA) of MC33375D-3.3R2G in standard SOIC-8 layout?
In a standard SOIC-8 footprint with no added copper pour, the MC33375D-3.3R2G exhibits RJA = 160 °C/W. With 1-inch² of 2 oz. copper connected to the ground pins, RJA improves to ~60 °C/W. Derating curves in Figure 26 of the datasheet confirm ≥300 mA continuous output is achievable at TA = 50 °C with moderate copper area.
Is MC33375D-3.3R2G pin-compatible with MC33375D-3.0R2G?
Yes - MC33375D-3.3R2G and MC33375D-3.0R2G share identical SOIC-8 (Case 751) packaging, pinout, and footprint. They differ only in output voltage (3.3 V vs. 3.0 V) and output voltage tolerance specification (2% for both across −40 °C to +125 °C), enabling drop-in replacement in designs where the target rail voltage aligns with system requirements.
MC33375D-3.3R2G 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):
- 13V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 200 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (120Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MC33375D-3.3R2G FAQ
1.How can I place an order for MC33375D-3.3R2G through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33375D-3.3R2G 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 MC33375D-3.3R2G reliable?
The price and inventory of MC33375D-3.3R2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33375D-3.3R2G is usually 5 days.
3.What payment methods are accepted for MC33375D-3.3R2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33375D-3.3R2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33375D-3.3R2G?
MC33375D-3.3R2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33375D-3.3R2G 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 MC33375D-3.3R2G?
For technical support, including MC33375D-3.3R2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33375D-3.3R2G requirements.
6.How does Aetrix verify that MC33375D-3.3R2G is sourced from the original manufacturer or authorized distributors?
All MC33375D-3.3R2G 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 MC33375D-3.3R2G meets industry standards.
7.What is the process for return or replacement of MC33375D-3.3R2G?
All MC33375D-3.3R2G units undergo pre-shipment inspection (PSI). If there is an issue with MC33375D-3.3R2G, 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 MC33375D-3.3R2G part is unused and in its original packaging.
Return procedure for MC33375D-3.3R2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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