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onsemi MC33275D-3.0R2
- Part No.:
- MC33275D-3.0R2
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC33275D-3.0R2.pdf
- Description:
- IC REG LINEAR 3V 300MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,162
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Product details
Overview
MC33275D-3.0R2 from onsemi is a fixed-output 3.0 V, 300 mA low-dropout (LDO) linear voltage regulator in SOIC-8 package. It delivers ultra-low dropout (25 mV at 10 mA; 260 mV at 300 mA), tight line/load regulation (<10 mV), and operates over −40°C to +125°C. Designed for battery-powered instrumentation requiring extended runtime and stable low-noise supply.
For engineers reviewing the MC33275D-3.0R2 datasheet, pinout, applications, or equivalent options, key selection criteria include dropout performance at full load, thermal shutdown threshold (150°C), quiescent current (125 µA typ), and stability with minimal 0.33 µF output capacitance.
Technical Context
This LDO uses a PNP pass transistor architecture enabling sub-100 mV dropout at light loads and robust operation down to 2.5 V input. Internal protection includes foldback current limiting (450 mA typ) and thermal shutdown without hysteresis-causing output toggling above 150°C junction temperature.
It achieves high ripple rejection (65 dB min at 120 Hz) and low output noise (46 µVrms with 200 µF capacitor), supporting noise-sensitive analog and mixed-signal circuits. Stability is guaranteed with ≥0.33 µF ceramic or tantalum output capacitors across all 3.0 V operating conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.00 V ±2% over −40°C to +125°C - ensures reliable logic-level supply for 3.3 V I/O systems with margin. |
| Max Output Current | 300 mA - sufficient to power microcontrollers, sensors, and RF front-ends in portable devices. |
| Dropout Voltage | 260 mV at 300 mA - enables operation from single-cell Li-ion (3.0 V min) or two-cell alkaline (3.0 V fresh) sources. |
| Quiescent Current | 125 µA typical - extends battery life in always-on monitoring applications like handheld meters. |
| Ripple Rejection | 65 dB minimum at 120 Hz - suppresses switching noise from upstream DC/DC converters feeding the LDO. |
| Thermal Shutdown | 150°C junction - protects against sustained overload or poor PCB heatsinking without permanent damage. |
| Stability Capacitance | 0.33 µF min (ceramic/tantalum) - reduces BOM count and board space vs. legacy LDOs requiring >10 µF. |
Pinout & Package
MC33275D-3.0R2 is housed in SOIC-8 (Case 751, D suffix), 4.9 mm × 3.9 mm × 1.5 mm body, Pb-free, with exposed pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Vin) | Input Supply | Accepts 3.3–13 V DC; must be bypassed with ≥0.33 µF capacitor near pin for transient immunity. |
| 2 (GND) | Ground Reference | Primary ground return for regulator core; connects to system ground plane for thermal and noise control. |
| 3 (GND) | Ground Reference | Second ground pin improves thermal conduction and reduces ground impedance in high-current paths. |
| 4 (GND) | Ground Reference | Third ground pin further lowers thermal resistance and stabilizes feedback loop under dynamic load. |
| 5 (N/C) | No Connect | Internally unconnected; must remain floating-no external tie or pull-up/down required. |
| 6 (N/C) | No Connect | Internally unconnected; PCB layout must isolate this pad from traces and planes. |
| 7 (Vout) | Regulated Output | Delivers stable 3.0 V; requires ≥0.33 µF output capacitor placed within 5 mm for stability. |
| 8 (GND) | Ground Reference | Fourth ground terminal enhances thermal dissipation and minimizes output voltage error due to ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-Low Dropout | 25 mV at 10 mA enables use in deep-discharge battery scenarios where input falls near output voltage. |
| Tight Load Regulation | ≤25 mV variation from 0–250 mA load ensures consistent voltage for ADC references and precision analog stages. |
| Low-Noise Operation | 46 µVrms (10 Hz–100 kHz) supports sensitive RF receivers and audio codecs without additional filtering. |
| Integrated Protection | Current limit (450 mA) + thermal shutdown (150°C) eliminate need for external fault-handling circuitry. |
| Wide Temp Range | −40°C to +125°C operation qualifies for industrial automation, automotive cabin modules, and outdoor IoT nodes. |
Applications
| Handheld Test Equipment | Portable Medical Sensors |
|---|---|
Use Scenario: Battery-powered multimeter with LCD display, microcontroller, and analog front-end. IC Role / Device Role / Timing Role: Primary 3.0 V supply rail for MCU core, ADC reference, and display driver ICs. Use Value: 260 mV dropout allows operation until battery reaches 3.26 V, extending usable runtime by >18% vs. standard LDOs. | Use Scenario: Wearable pulse oximeter using optical sensing and Bluetooth LE transmission. IC Role / Device Role / Timing Role: Clean 3.0 V bias for photodiode amplifier and BLE SoC I/O domain. Use Value: 46 µVrms output noise prevents signal corruption in sub-mV physiological measurements. |
| Industrial Data Loggers | Smart Home Controllers |
Use Scenario: Ruggedized environmental logger with temperature/humidity sensors and LoRaWAN radio. IC Role / Device Role / Timing Role: Main power regulator for MCU, sensor interface, and RF transceiver during burst transmission. Use Value: −40°C to +125°C rating ensures reliability in unheated enclosures deployed in extreme climates. | Use Scenario: Battery-backed HVAC controller with touch interface and Zigbee connectivity. IC Role / Device Role / Timing Role: Standby and active-mode 3.0 V supply for capacitive touch controller and wireless SoC. Use Value: 125 µA quiescent current enables >5-year battery life in always-listening mode with coin-cell backup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP1117ST30T3G | 800 mA rated, higher IQ (6 mA), TO-220/SOT-223 only - no SOIC-8 option. | Better for high-current, non-space-constrained designs; unsuitable for dense SOIC layouts. | Select when >300 mA load or thermal mass from TO-220 is acceptable; avoid for compact PCBs. |
| MCP1700T-3002E/MB | 250 mA max, 1.6 µA IQ, SOT-23-3 - smaller footprint but lower current and no thermal shutdown. | Ideal for ultra-low-power wake-on-event sensors; lacks overtemperature protection for continuous operation. | Choose for micropower sleep-mode applications; reject if thermal fault coverage or 300 mA peak is required. |
Compared with NCP1117ST30T3G and MCP1700T-3002E/MB, MC33275D-3.0R2 uniquely balances SOIC-8 manufacturability, 300 mA capability, 125 µA quiescent current, and full thermal/current protection-making it optimal for mid-power industrial and portable designs where layout density and reliability coexist.
Availability
MC33275D-3.0R2 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, industrial data loggers, and smart home controllers requiring stable component supply and long-term production continuity.
Supply support for MC33275D-3.0R2 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, with leadership in power management, analog, and sensor technologies.
The MC33275 series belongs to onsemi's precision linear regulator product line, engineered for high-reliability, low-noise, and wide-temperature operation in battery-critical and industrial environments.
FAQ
What is the maximum input voltage for MC33275D-3.0R2?
The absolute maximum input voltage for MC33275D-3.0R2 is 13 V DC, as specified in the Maximum Ratings table. Operation above this level risks permanent damage. For reliable 3.0 V output, input should be maintained between 3.3 V (to ensure dropout margin) and 12 V under normal conditions. The device includes internal protection but is not rated for transient overvoltage beyond 13 V.
Does MC33275D-3.0R2 require an input capacitor?
Yes, MC33275D-3.0R2 requires an input bypass capacitor-recommended minimum 0.33 µF-to improve transient response and reduce sensitivity to input line impedance, especially when connected via long traces (>4 inches) to upstream filters or DC/DC converters. Ceramic or low-ESR tantalum types are preferred, mounted directly across pins 1 (Vin) and 2 (GND).
Can MC33275D-3.0R2 be used with ceramic output capacitors?
Yes, MC33275D-3.0R2 is stable with ceramic output capacitors of ≥0.33 µF, as confirmed in the Applications Information section. Unlike older LDOs, it does not require ESR-based damping; multilayer ceramic capacitors (MLCCs) are explicitly recommended for operation below 25°C and provide superior high-frequency noise filtering compared to tantalum alternatives.
What happens when MC33275D-3.0R2 exceeds its thermal limit?
When MC33275D-3.0R2 junction temperature reaches ~150°C, its thermal shutdown circuit disables the output. Because there is no hysteresis, the output toggles on/off as temperature cycles across the threshold-appearing as oscillation. This protects the die but indicates inadequate PCB copper area or airflow; proper heatsinking or derating is required for continuous operation near thermal limits.
Is MC33275D-3.0R2 pin-compatible with other regulators in the MC33275 family?
Yes, all MC33275 variants-including MC33275D-3.0R2, MC33275D-3.3R2G, and MC33275D-5.0R2G-share identical SOIC-8 pinout and package dimensions (Case 751). Output voltage is set internally; no external resistors are needed. This allows direct voltage-option substitution on the same PCB layout without redesign.
MC33275D-3.0R2 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):
- 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:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MC33275D-3.0R2 FAQ
1.How can I place an order for MC33275D-3.0R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33275D-3.0R2 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 MC33275D-3.0R2 reliable?
The price and inventory of MC33275D-3.0R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33275D-3.0R2 is usually 5 days.
3.What payment methods are accepted for MC33275D-3.0R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33275D-3.0R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33275D-3.0R2?
MC33275D-3.0R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33275D-3.0R2 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 MC33275D-3.0R2?
For technical support, including MC33275D-3.0R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33275D-3.0R2 requirements.
6.How does Aetrix verify that MC33275D-3.0R2 is sourced from the original manufacturer or authorized distributors?
All MC33275D-3.0R2 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 MC33275D-3.0R2 meets industry standards.
7.What is the process for return or replacement of MC33275D-3.0R2?
All MC33275D-3.0R2 units undergo pre-shipment inspection (PSI). If there is an issue with MC33275D-3.0R2, 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 MC33275D-3.0R2 part is unused and in its original packaging.
Return procedure for MC33275D-3.0R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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