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onsemi MC33375D-3.3R2
- Part No.:
- MC33375D-3.3R2
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC33375D-3.3R2.pdf
- Description:
- IC REG LINEAR 3.3V 300MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,449
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Product details
Overview
MC33375D-3.3R2 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. 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-3.3R2 datasheet, pinout, applications, or equivalent options, key selection criteria include dropout performance at 300 mA, ON/OFF control threshold compatibility with 3.3 V logic, thermal derating on standard PCB copper, and stability with ≥0.33 µF ceramic output capacitance.
Technical Context
The MC33375D-3.3R2 employs 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 thresholds (VCTRL = 2.4 V min for ON, 0.5 V max for OFF), directly interfacing with microcontrollers without level-shifting.
Internal protection includes foldback current limiting (450 mA typical) and thermal shutdown at 150 °C with no hysteresis, causing output oscillation under sustained overload - requiring external thermal design validation per Figure 26's RJA vs. copper area curves for SOIC-8.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.30 V ±2% over −40 °C to +125 °C - ensures reliable 3.3 V rail for MCU I/O and analog peripherals across automotive-grade temperature range. |
| Max Output Current | 300 mA - sufficient to power ARM Cortex-M microcontrollers with peripherals, sensor arrays, or RF transceivers without external boost. |
| Dropout Voltage | 260 mV at 300 mA - enables operation from 3.56 V input (e.g., single Li-ion cell post-protection), extending battery runtime. |
| Quiescent Current | 125 µA (ON), 0.3 µA (OFF) - minimizes standby drain in always-on monitoring systems; OFF mode reduces system sleep current to nanoampere levels. |
| Ripple Rejection | 65 dB at 120 Hz - suppresses AC-DC adapter ripple and switching converter noise, critical for ADC reference stability and audio signal chains. |
| Thermal Shutdown | 150 °C junction - protects against solder reflow damage and sustained overloads; requires PCB copper area ≥10 mm² per Figure 26 for >150 mW continuous dissipation at 50 °C ambient. |
| Stability Capacitance | 0.33 µF ceramic - eliminates need for tantalum or large electrolytics; compatible with space-constrained layouts using 0603/0805 MLCCs. |
Pinout & Package
MC33375D-3.3R2 uses the SOIC-8 NB package (Case 751-07), 4.9 × 3.9 × 1.5 mm body, Pb-free, with gull-wing leads. Thermal resistance is 160 °C/W (junction-to-ambient, no copper), reduced to ≤90 °C/W with 25 mm² 2-oz copper pad per Figure 26.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Supply | Accepts 3.56–13 V DC; must be bypassed with ≥0.33 µF capacitor within 5 mm of pin to ensure transient response and stability. |
| 2 (GND) | Ground Reference | Primary ground return for regulator core and feedback network; connects to low-impedance system ground plane to minimize noise coupling. |
| 3 (VOUT) | Regulated Output | Delivers 3.3 V ±2%; requires ≥0.33 µF ceramic capacitor placed adjacent to pin; ESR < 1 Ω recommended for full-load stability. |
| 4 (ON/OFF) | Enable Control | Active-high logic input; pulled high (>2.4 V) enables output, pulled low (<0.5 V) disables output; must not float - tie to MCU GPIO or pull-up resistor. |
| 5 (GND) | Ground Reference | Second ground terminal; internally connected to Pin 2 - used for Kelvin sensing or low-noise layout separation; both GND pins must connect to same ground plane. |
| 6 (GND) | Ground Reference | Third ground terminal; identical function to Pins 2 and 5 - provides additional current-carrying capacity and thermal path; all three GND pins share internal bond wire. |
| 7 (GND) | Ground Reference | Fourth ground terminal; completes quad-GND configuration for SOIC-8 package - reduces ground impedance and improves PSRR above 10 kHz. |
| 8 (NC) | No Connect | Internally unconnected; must remain unpopulated and unconnected on PCB to avoid parasitic coupling or latch-up risk. |
Key Features
| Feature | Design Value |
|---|---|
| Logic-Level ON/OFF Control | Direct interface with 3.3 V microcontrollers - eliminates external MOSFET or level shifter in battery management and wake-on-event designs. |
| Ultra-Low Dropout | 260 mV at 300 mA enables use with single-cell Li-ion (3.0–4.2 V) or 3.3 V backplane supplies where headroom is constrained. |
| Sub-µA Off-State Current | 0.3 µA shutdown current extends shelf life of sealed instruments and remote IoT nodes powered by primary lithium cells. |
| Single-Capacitor Stability | Stable with 0.33 µF ceramic output cap - reduces BOM count, board area, and cost versus traditional LDOs requiring 10 µF tantalum. |
| Automotive-Qualified Variant Available | NCV33375D-3.3R2G version meets AEC-Q100 Grade 1 (−40 °C to +125 °C) and PPAP requirements for under-hood and infotainment applications. |
Applications
| Industrial Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered wireless temperature/humidity sensor transmitting data via BLE every 5 seconds. IC Role / Device Role / Timing Role: Primary 3.3 V power rail regulator for MSP430 MCU, Si7021 sensor, and nRF52832 radio. Use Value: 125 µA quiescent current and 0.3 µA OFF mode extend CR2032 coin cell life to >2 years; 260 mV dropout allows operation down to 3.56 V input as battery discharges. | Use Scenario: Handheld ECG device with OLED display, analog front-end, and USB charging circuitry. IC Role / Device Role / Timing Role: Post-regulator supplying clean 3.3 V to ADC reference, op-amps, and display controller from switched 5 V USB input. Use Value: 65 dB ripple rejection isolates sensitive analog measurements from USB switcher noise; 0.33 µF ceramic stability simplifies layout in tight medical enclosure. |
| Automotive Body Control Module | Smart Home Hub Controller |
Use Scenario: Low-power door module managing window lift, mirror fold, and interior lighting via LIN bus. IC Role / Device Role / Timing Role: Secondary regulator deriving 3.3 V from 12 V battery rail for 32-bit ARM-based controller and CAN transceiver. Use Value: Thermal shutdown at 150 °C prevents failure during engine bay thermal soak; NCV variant supports AEC-Q100 qualification for production deployment. | Use Scenario: Always-on voice assistant hub with Wi-Fi SoC, microphone array, and LED status indicators. IC Role / Device Role / Timing Role: Standby power regulator enabling fast wake-from-sleep while maintaining RTC and memory retention. Use Value: Quad-GND SOIC-8 layout minimizes ground bounce during Wi-Fi transmit bursts; ON/OFF pin synchronizes with SoC sleep states to cut system idle power by >99%. |
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 |
|---|---|---|---|
| TLV73333PDBVR | Lower quiescent current (35 µA ON), smaller SOT-23-5 package, but only 300 mA guaranteed at 400 mV dropout - less margin at high ambient temperatures. | Preferred for ultra-small footprint designs where thermal mass is limited; unsuitable for 125 °C ambient without derating. | Select when board space is critical and full 300 mA load occurs only intermittently at <85 °C ambient. |
| NCV8535MN33R2G | Automotive-qualified (AEC-Q100 Grade 1), same SOIC-8 package, but higher 250 µA quiescent current and 300 mV dropout at 300 mA. | Designed for harsh environments with extended temperature cycling and vibration; includes enhanced ESD robustness (±8 kV HBM). | Select for production automotive ECUs requiring PPAP documentation and long-term supply assurance beyond commercial-grade parts. |
Compared with TLV73333PDBVR, MC33375D-3.3R2 offers superior thermal resilience and wider input voltage range (13 V vs. 5.5 V), while NCV8535MN33R2G trades quiescent current for automotive compliance - making MC33375D-3.3R2 optimal for industrial and medical designs needing balance of performance, package familiarity, and cost.
Availability
MC33375D-3.3R2 is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, and smart home controllers requiring stable component supply with consistent SOIC-8 footprint and long-lifecycle support.
Supply support for MC33375D-3.3R2 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT 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 sub-systems, and industrial edge devices.
FAQ
What is the maximum input voltage rating for the MC33375D-3.3R2?
The MC33375D-3.3R2 has an absolute maximum input voltage of 13 V DC. Exceeding this rating risks permanent damage due to junction breakdown. For reliable operation, maintain input voltage between 3.56 V (3.3 V + 260 mV dropout) and 12 V in normal use, with adequate derating for thermal conditions per Figure 26's SOIC-8 thermal curves.
Can the MC33375D-3.3R2 operate with a 0.22 µF output capacitor?
No - the MC33375D-3.3R2 requires a minimum 0.33 µF ceramic output capacitor for stability with 3.3 V output. The 0.22 µF value is specified only for 5.0 V versions. Using 0.22 µF with MC33375D-3.3R2 may cause oscillation or poor transient response, especially under load steps exceeding 100 mA.
Does the MC33375D-3.3R2 support adjustable output voltage?
No - the MC33375D-3.3R2 is a fixed-output regulator with nominal 3.3 V. It lacks an external feedback divider connection; the internal 1.23 V reference is trimmed to deliver 3.30 V ±2%. For adjustable output, consider the MC33269 family or discrete resistor-divider variants of the MC33375 series (not applicable to D-suffix SOIC-8 parts).
How does the ON/OFF pin behave during power-up?
The MC33375D-3.3R2 output remains disabled until the ON/OFF pin is actively driven above 2.4 V. If left floating or pulled below 0.5 V at power-up, the regulator stays off. A 100 kΩ pull-up resistor to VIN is recommended to ensure default-enable behavior unless controlled by a processor GPIO.
Is the MC33375D-3.3R2 RoHS compliant and lead-free?
Yes - the MC33375D-3.3R2 is Pb-free and RoHS compliant, as indicated by the "G" suffix in its full orderable part number (MC33375D-3.3R2G) and confirmed in the onsemi datasheet's ordering table and marking diagrams. It meets JEDEC J-STD-609 Category 1 moisture sensitivity and IPC/JEDEC J-STD-020 reflow profiles.
MC33375D-3.3R2 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-3.3R2 FAQ
1.How can I place an order for MC33375D-3.3R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33375D-3.3R2 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-3.3R2 reliable?
The price and inventory of MC33375D-3.3R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33375D-3.3R2 is usually 5 days.
3.What payment methods are accepted for MC33375D-3.3R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33375D-3.3R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33375D-3.3R2?
MC33375D-3.3R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33375D-3.3R2 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-3.3R2?
For technical support, including MC33375D-3.3R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33375D-3.3R2 requirements.
6.How does Aetrix verify that MC33375D-3.3R2 is sourced from the original manufacturer or authorized distributors?
All MC33375D-3.3R2 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-3.3R2 meets industry standards.
7.What is the process for return or replacement of MC33375D-3.3R2?
All MC33375D-3.3R2 units undergo pre-shipment inspection (PSI). If there is an issue with MC33375D-3.3R2, 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-3.3R2 part is unused and in its original packaging.
Return procedure for MC33375D-3.3R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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