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onsemi MC33275DT-2.5G
- Part No.:
- MC33275DT-2.5G
- Manufacturer:
- onsemi
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MC33275DT-2.5G.pdf
- Description:
- IC REG LINEAR 2.5V 300MA DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:3,065
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Product details
Overview
MC33275DT-2.5G from onsemi is a fixed-output 2.5 V, 300 mA micropower low dropout (LDO) voltage regulator in DPAK-3 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 MC33275DT-2.5G 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 compatibility with minimal ceramic output capacitance in space-constrained portable designs.
Technical Context
The MC33275DT-2.5G uses a PNP pass transistor architecture enabling low dropout across its operating range. Its internal thermal shutdown circuit activates at 150°C without hysteresis, causing output oscillation until junction temperature falls below threshold.
It features internal current limiting (450 mA typ), stable operation with 0.33 µF ceramic output capacitor, and ripple rejection of 65 dB at 120 Hz. Quiescent current remains at 125 µA typical under no-load conditions with input ≥ VO + 1 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±2% over −40°C to +125°C - ensures stable logic supply for 2.5 V I/O domains across automotive/industrial temperature ranges. |
| Max Output Current | 300 mA - sufficient to power microcontrollers, sensors, and RF front-ends in portable instrumentation. |
| Dropout Voltage | 260 mV at 300 mA - enables regulation from 2.76 V input, critical for single-cell Li-ion or two-cell alkaline systems. |
| Quiescent Current | 125 µA typical - minimizes standby power loss, extending battery life in always-on monitoring devices. |
| Ripple Rejection | 65 dB at 120 Hz - suppresses switching noise from upstream DC/DC converters feeding sensitive analog circuits. |
| Thermal Shutdown | 150°C activation - protects against sustained overload or poor PCB heatsinking in enclosed enclosures. |
| Stability Capacitance | 0.33 µF ceramic - eliminates need for tantalum or electrolytic capacitors, reducing BOM cost and board area. |
Pinout & Package
DPAK-3 (Case 369A) surface-mount package with exposed thermal pad; 6.10 × 6.54 × 2.28 mm footprint, 2.29 mm pitch; designed for high-power dissipation in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input (Vin) | Main power input; accepts up to 13 V DC; requires local 0.33 µF bypass capacitor. |
| 2 | Ground (GND) | Power ground reference; must be connected to low-impedance PCB ground plane for stability and thermal performance. |
| 3 | Output (Vout) | Regulated 2.5 V output; connects directly to load; output capacitor must be placed within 2 cm for guaranteed stability. |
| 4 | Ground (GND) | Second ground terminal; electrically tied to Pin 2 internally; improves thermal conduction via exposed pad soldering. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 25 mV at 10 mA load - enables operation with minimal headroom, preserving battery energy in deep-discharge states. |
| Tight regulation | Line regulation ≤10 mV, load regulation ≤25 mV - maintains consistent voltage under varying source/load conditions for precision analog stages. |
| Low-noise operation | 46 µVrms output noise (10 Hz–100 kHz) - suitable for ADC references and RF bias rails without external filtering. |
| Integrated protection | Current limit (450 mA) and thermal shutdown (150°C) - eliminates need for external fault management circuitry. |
| Pb-free packaging | RoHS-compliant DPAK-3 (G suffix) - meets global environmental compliance requirements for industrial and automotive applications. |
Applications
| Hand-Held Instruments | Camcorders and Cameras |
|---|---|
Use Scenario: Portable multimeters and data loggers powered by two AA cells (2.4–3.2 V). IC Role / Device Role / Timing Role: Primary 2.5 V LDO supplying microcontroller core, ADC, and sensor interface. Use Value: 260 mV dropout allows regulation down to 2.76 V input, maximizing usable battery capacity before cutoff. |
Use Scenario: Image sensor bias and digital signal processor I/O supply in compact camcorders. IC Role / Device Role / Timing Role: Low-noise 2.5 V rail for CMOS image sensor analog front-end and memory I/O. Use Value: 46 µVrms output noise prevents quantization errors in 12-bit+ imaging pipelines. |
| Battery-Powered Consumer Products | Industrial Portable Test Equipment |
Use Scenario: Wireless remote controls and smart home sensors using coin-cell or AAA batteries. IC Role / Device Role / Timing Role: Micropower 2.5 V regulator enabling <1 µA sleep current and fast wake-up response. Use Value: 125 µA quiescent current extends shelf life and operational runtime beyond 12 months on single CR2032 cell. |
Use Scenario: Handheld oscilloscope modules and field calibration tools with wide ambient temperature exposure. IC Role / Device Role / Timing Role: Temperature-stable 2.5 V reference for precision DACs and analog measurement subsystems. Use Value: ±2% output tolerance over −40°C to +125°C ensures measurement accuracy without recalibration in outdoor environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP1117DT25RKG | Higher dropout (1.1 V at 800 mA), higher IQ (6 mA), SO-8 package - less efficient at light loads and smaller max current. | Designed for higher-current, non-battery applications; lacks micropower optimization. | Choose when cost is primary and >300 mA output is required; avoid for battery life-critical designs. |
| MCP1700T-2502E/MB | Lower IQ (1.6 µA), but only 250 mA output and 600 mV dropout at full load - insufficient for 300 mA continuous use. | Targeted at ultra-low-power IoT endpoints; not rated for sustained 300 mA operation. | Prefer for sub-100 µA standby systems; reject if peak load exceeds 250 mA or dropout budget <300 mV. |
Compared with NCP1117DT25RKG and MCP1700T-2502E/MB, the MC33275DT-2.5G uniquely balances 300 mA capability, 260 mV dropout, and 125 µA quiescent current - making it the only option among the three qualified for high-efficiency, medium-current, wide-temperature portable instrumentation.
Availability
MC33275DT-2.5G is available at Aetrix Electronics and suitable for battery-powered consumer products, handheld instruments, and industrial portable test equipment requiring stable component supply with long-term lifecycle support.
Supply support for MC33275DT-2.5G 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 sensing solutions for automotive, industrial, and consumer markets.
The MC33275DT-2.5G belongs to the MC33275 series of micropower LDO regulators engineered specifically for battery-operated portable electronics where extended runtime, small solution size, and robust thermal protection are mandatory.
FAQ
What is the maximum input voltage rating for MC33275DT-2.5G?
The MC33275DT-2.5G has an absolute maximum input voltage of 13 V DC. Exceeding this rating may cause permanent damage. For reliable operation, input should remain within 2.76 V to 13 V to maintain regulation and avoid thermal stress - especially important when delivering 300 mA continuously.
Can MC33275DT-2.5G operate stably with a 0.22 µF output capacitor?
No - the MC33275DT-2.5G requires a minimum of 0.33 µF ceramic output capacitance for guaranteed stability at 2.5 V output. While 5.0 V versions accept 0.22 µF, the 2.5 V variant's internal compensation is optimized for ≥0.33 µF; using smaller values risks oscillation or poor transient response.
Does MC33275DT-2.5G include reverse polarity protection?
No - the MC33275DT-2.5G does not integrate reverse polarity protection. Applying reversed input voltage will damage the device. External protection (e.g., series Schottky diode or MOSFET-based ideal diode) must be added if system-level reverse-voltage risk exists.
How does thermal shutdown behave on MC33275DT-2.5G during sustained overload?
When junction temperature reaches 150°C, MC33275DT-2.5G disables output without hysteresis. As temperature drops below threshold, output re-enables - causing visible output oscillation under constant overload. This behavior signals inadequate heatsinking or excessive power dissipation, not a fault condition.
Is MC33275DT-2.5G qualified for automotive applications?
No - MC33275DT-2.5G is not AEC-Q100 qualified. For automotive use, select the NCV33275ST-2.5T3G (SOT-223) or NCV33275DT-2.5RKG (DPAK), which carry NCV prefix, PPAP capability, and full AEC-Q100 qualification including temperature cycling and HTOL testing.
MC33275DT-2.5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Bulk
- 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:
- DPAK
MC33275DT-2.5G FAQ
1.How can I place an order for MC33275DT-2.5G through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33275DT-2.5G 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 MC33275DT-2.5G reliable?
The price and inventory of MC33275DT-2.5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33275DT-2.5G is usually 5 days.
3.What payment methods are accepted for MC33275DT-2.5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33275DT-2.5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33275DT-2.5G?
MC33275DT-2.5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33275DT-2.5G 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 MC33275DT-2.5G?
For technical support, including MC33275DT-2.5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33275DT-2.5G requirements.
6.How does Aetrix verify that MC33275DT-2.5G is sourced from the original manufacturer or authorized distributors?
All MC33275DT-2.5G 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 MC33275DT-2.5G meets industry standards.
7.What is the process for return or replacement of MC33275DT-2.5G?
All MC33275DT-2.5G units undergo pre-shipment inspection (PSI). If there is an issue with MC33275DT-2.5G, 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 MC33275DT-2.5G part is unused and in its original packaging.
Return procedure for MC33275DT-2.5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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