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onsemi MC33275D-2.5R2G
- Part No.:
- MC33275D-2.5R2G
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC33275D-2.5R2G.pdf
- Description:
- IC REG LINEAR 2.5V 300MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,138
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Product details
Overview
MC33275D-2.5R2G from onsemi is a fixed-output 2.5 V, 300 mA low-dropout (LDO) linear voltage regulator in SOIC-8 package. It delivers ultra-low dropout voltage (25 mV at 10 mA; 260 mV at 300 mA), tight line/load regulation (<10 mV), and stable operation with only 0.33 µF output capacitance - ideal for battery-powered handheld instruments requiring extended runtime and low-noise supply.
For engineers reviewing the MC33275D-2.5R2G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout performance at full load, thermal shutdown behavior at 150°C, quiescent current (125 µA typ), output voltage tolerance (±2% over −40°C to +125°C), and compatibility with low-ESR ceramic capacitors.
Technical Context
The MC33275D-2.5R2G employs a PNP pass transistor architecture enabling low dropout operation without external bias rails. Its internal current limit (450 mA typ) and thermal shutdown circuit activate independently to protect against overload and junction overheating.
It operates across −40°C to +125°C ambient temperature with input voltage up to 13 V, and maintains regulation down to VIN = VOUT + 260 mV at 300 mA. Ripple rejection exceeds 65 dB at 120 Hz, and output noise is 46 µVrms (10 Hz–100 kHz) with 200 µF capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±2% over −40°C to +125°C - ensures stable logic-level supply for 2.5 V microcontrollers and sensors. |
| Max Output Current | 300 mA continuous - sufficient to power multiple low-power ICs (e.g., MCU + ADC + interface) from single LDO. |
| Dropout Voltage | 260 mV at 300 mA - enables operation from single-cell Li-ion (3.0 V min) or two-cell alkaline (3.2 V min) with margin. |
| Quiescent Current | 125 µA typical - minimizes standby power loss in battery-critical applications like portable medical devices. |
| Line Regulation | ≤10 mV over VIN = (VOUT + 1) V to 12 V - maintains tight output stability despite battery voltage sag or input ripple. |
| Load Regulation | ≤25 mV over 0–250 mA load - prevents output droop during dynamic processor wake/sleep transitions. |
| Ripple Rejection | ≥65 dB at 120 Hz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Thermal Shutdown | 150°C activation - protects die during sustained overload or poor PCB heatsinking without latch-off. |
Pinout & Package
MC33275D-2.5R2G uses SOIC-8 (Case 751) package with exposed pad for thermal enhancement. Pin 1 is Input (VIN), Pin 2 is Ground (GND), Pin 3 is Output (VOUT), and Pins 4–8 are internally connected to GND per datasheet Figure 2 (MC33275D pinout).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Input (VIN) | Primary DC input connection; must be bypassed with ≥0.33 µF capacitor near pin for stability. |
| Pin 2 | Ground (GND) | Main reference and return path; connects to PCB ground plane for thermal and noise control. |
| Pin 3 | Output (VOUT) | Regulated 2.5 V supply; requires low-ESR output capacitor placed adjacent to pin. |
| Pins 4–8 | Ground (GND) | Multiple GND terminals reduce impedance and improve thermal conduction to PCB copper area. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 25 mV at 10 mA enables use in deep-battery-discharge scenarios where input may dip close to output. |
| Stable with minimal capacitance | 0.33 µF ceramic output cap suffices - reduces BOM count and board space vs. traditional LDOs needing >10 µF. |
| Integrated protection | Current limit (450 mA) and thermal shutdown (150°C) eliminate need for external fault-handling circuitry. |
| Low-noise operation | 46 µVrms output noise (with 200 µF cap) supports precision analog circuits like 12-bit ADCs and op-amps. |
| Pb-free & AEC-Q100 capable | RoHS-compliant packaging; NCV variant available for automotive - confirms robustness for industrial environments. |
Applications
| Hand-Held Medical Instruments | Industrial Sensor Nodes |
|---|---|
Use Scenario: Portable blood glucose meter powered by two AA alkaline cells (3.2 V fresh, ~2.6 V end-of-life). IC Role / Device Role / Timing Role: Primary 2.5 V supply for microcontroller, LCD driver, and analog front-end. Use Value: 260 mV dropout ensures regulation until battery reaches 2.76 V, extending usable runtime by >18% vs. standard LDOs. |
Use Scenario: Wireless temperature/humidity sensor node with LoRaWAN radio and 16-bit ADC. IC Role / Device Role / Timing Role: Clean, low-noise 2.5 V reference and core supply for precision measurement subsystem. Use Value: 46 µVrms noise and <25 mV load regulation prevent ADC quantization errors under RF transmit bursts. |
| Camcorder Image Signal Chain | Smart Home Hub Controller |
Use Scenario: Compact camcorder using CMOS image sensor and ISP requiring stable 2.5 V analog supply. IC Role / Device Role / Timing Role: Dedicated LDO for sensor analog rail, isolated from noisy digital domains. Use Value: 65 dB ripple rejection suppresses switching noise from main PMIC, preserving SNR in video capture. |
Use Scenario: Battery-backed smart home hub with Zigbee/Thread co-processor and real-time clock. IC Role / Device Role / Timing Role: Always-on 2.5 V supply for RTC, backup SRAM, and wake-up controller. Use Value: 125 µA quiescent current limits annual battery drain to <1.1 Ah - enabling 5+ years on CR2032. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP1117ST25T3G | Higher dropout (1.1 V @ 800 mA), TO-220/SOT-223 only, no SOIC-8 option. | Requires larger PCB footprint and heatsink; unsuitable for space-constrained SOIC designs. | Select when higher current (>500 mA) is needed and thermal design allows TO-220 mounting. |
| MCP1700T-2502E/MB | Lower IQ (1.6 µA), but max current only 250 mA; SOT-23-3 package, no multi-GND pins. | Lacks thermal robustness and current headroom for burst-load applications like sensor sampling. | Prefer for ultra-low-power, low-current nodes where SOIC-8 footprint and 300 mA headroom are unnecessary. |
Compared with NCP1117ST25T3G and MCP1700T-2502E/MB, MC33275D-2.5R2G uniquely balances SOIC-8 compactness, 300 mA capability, sub-300 mV dropout, and integrated multi-GND thermal path - making it optimal for space-limited industrial and portable designs demanding both efficiency and reliability.
Availability
MC33275D-2.5R2G is available at Aetrix Electronics and suitable for battery-powered consumer products, handheld instruments, and industrial sensor nodes requiring stable component supply with long-term manufacturability and RoHS compliance.
Supply support for MC33275D-2.5R2G 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 MC33275 series belongs to onsemi's precision analog LDO portfolio, designed specifically for battery-operated equipment where extended runtime, low noise, and thermal resilience are critical system requirements.
FAQ
What is the minimum input voltage required for MC33275D-2.5R2G to maintain regulation at 300 mA?
The MC33275D-2.5R2G requires VIN ≥ VOUT + 260 mV to maintain regulation at 300 mA, meaning minimum input is 2.76 V. This value is confirmed in the Electrical Characteristics table (Dropout Voltage row, IO = 300 mA) and validated across −40°C to +125°C junction temperature range.
Can MC33275D-2.5R2G operate with a 0.22 µF ceramic output capacitor?
No - MC33275D-2.5R2G requires ≥0.33 µF output capacitance for stability at 2.5 V output, as explicitly stated in the Applications Information section. While 5.0 V versions accept 0.22 µF, using undersized capacitance risks oscillation and output instability.
Does MC33275D-2.5R2G have built-in reverse polarity protection?
No - the MC33275D-2.5R2G does not include reverse polarity protection. The Absolute Maximum Ratings specify input voltage range as 0 to 13 V (no negative rating), and the block diagram shows no series diode or protection circuitry. External input protection must be added if reverse voltage exposure is possible.
Is the thermal shutdown of MC33275D-2.5R2G latched or self-resetting?
The thermal shutdown in MC33275D-2.5R2G is self-resetting with no hysteresis. As described in the Applications Information section, output disables at ~150°C and re-enables once junction temperature falls below threshold - causing observable oscillation under sustained overload conditions.
What is the maximum allowable power dissipation for MC33275D-2.5R2G in SOIC-8 package at 25°C ambient?
At TA = 25°C, the SOIC-8 (D suffix) package has RJA = 160°C/W. With TJ(max) = 150°C, maximum power dissipation is PD = (150 − 25)/160 = 0.78 W. This assumes no PCB copper extension; actual dissipation increases with added copper area per Figure 19.
MC33275D-2.5R2G 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):
- 2.5V
- 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-2.5R2G FAQ
1.How can I place an order for MC33275D-2.5R2G through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33275D-2.5R2G 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-2.5R2G reliable?
The price and inventory of MC33275D-2.5R2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33275D-2.5R2G is usually 5 days.
3.What payment methods are accepted for MC33275D-2.5R2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33275D-2.5R2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33275D-2.5R2G?
MC33275D-2.5R2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33275D-2.5R2G 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-2.5R2G?
For technical support, including MC33275D-2.5R2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33275D-2.5R2G requirements.
6.How does Aetrix verify that MC33275D-2.5R2G is sourced from the original manufacturer or authorized distributors?
All MC33275D-2.5R2G 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-2.5R2G meets industry standards.
7.What is the process for return or replacement of MC33275D-2.5R2G?
All MC33275D-2.5R2G units undergo pre-shipment inspection (PSI). If there is an issue with MC33275D-2.5R2G, 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-2.5R2G part is unused and in its original packaging.
Return procedure for MC33275D-2.5R2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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