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onsemi MC33275DT-3.0
- Part No.:
- MC33275DT-3.0
- Manufacturer:
- onsemi
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MC33275DT-3.0.pdf
- Description:
- IC REG LINEAR 3V 300MA DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:1,810
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Product details
Overview
MC33275DT-3.0 from onsemi is a fixed-output, 3.0 V, 300 mA low-dropout (LDO) linear voltage regulator in DPAK-3 package. It delivers ultra-low dropout (260 mV at 300 mA), tight load regulation (±25 mV), and operates across −40°C to +125°C ambient range. Designed for battery-powered instrumentation, it extends runtime via 125 µA typical quiescent current and internal thermal/current limiting.
For engineers reviewing the MC33275DT-3.0 datasheet, pinout, applications, or equivalent options, key selection criteria include dropout performance at full load, stability with minimal 0.33 µF output capacitance, thermal shutdown behavior at 150°C, and Pb-free DPAK-3 mechanical compatibility in space-constrained industrial PCB layouts.
Technical Context
The MC33275DT-3.0 employs a PNP pass transistor architecture enabling low dropout operation down to 25 mV at 10 mA. Its internal reference is trimmed to ±2% over −40°C to +125°C, and line regulation is maintained at ≤10 mV across 4.0 V to 12 V input range.
Thermal protection activates at 150°C junction temperature without hysteresis, causing output cycling until cooling occurs. Current limiting is set at 450 mA (typical), independent of thermal shutdown, and ground pin current remains below 1.5 mA at full load and elevated temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.00 V ±2% over −40°C to +125°C - ensures stable rail for 3.0 V logic and analog circuitry without external feedback. |
| Max Output Current | 300 mA continuous - supports moderate-power microcontrollers, sensors, and RF front-ends in portable systems. |
| Dropout Voltage | 260 mV at 300 mA - enables operation from single-cell Li-ion (3.2 V min) or two-cell alkaline (3.0 V min) without brownout. |
| Quiescent Current | 125 µA typical at zero load - minimizes standby power loss in always-on battery applications. |
| Stability Capacitance | 0.33 µF ceramic (min) - eliminates need for large, costly tantalum capacitors; simplifies layout and reduces BOM count. |
| Ripple Rejection | 65 dB at 120 Hz - suppresses AC ripple from switching pre-regulators or noisy DC sources feeding sensitive analog stages. |
| Thermal Shutdown | 150°C junction threshold - protects against sustained overload or inadequate heatsinking in sealed enclosures. |
Pinout & Package
DPAK-3 (Case 369C) surface-mount package with exposed thermal pad; 6.10 × 6.54 × 2.28 mm footprint, 2.29 mm lead pitch, and solderable thermal pad for enhanced power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input (Vin) | Main power input; accepts 4.0 V to 13 V - must be bypassed with ≥0.33 µF capacitor near pin for transient immunity. |
| 2 | Ground (GND) | Power return and reference node; connects to PCB ground plane under exposed pad for optimal thermal conduction. |
| 3 | Output (Vout) | Regulated 3.0 V supply; requires 0.33 µF ceramic capacitor placed within 5 mm for guaranteed stability. |
| 4 | Ground (GND) | Second ground terminal - electrically tied internally to Pin 2; used for low-inductance return path in high-current paths. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 25 mV at 10 mA load - enables regulation from weak or aging batteries where headroom is critical. |
| Internal protection | Current limit (450 mA typ) + thermal shutdown (150°C) - eliminates need for external foldback or thermal sensors. |
| Wide temperature range | −40°C to +125°C operation - qualified for industrial and automotive under-hood environments (non-AEC-Q100 variant). |
| Pb-free packaging | DPAK-3 with "G" suffix - compliant with RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profiles. |
| Low-noise output | 46 µVrms (10 Hz–100 kHz, 200 µF Cout) - suitable for powering precision ADCs, op-amps, and RF synthesizers. |
Applications
| Portable Medical Sensors | Industrial Handheld Scanners |
|---|---|
|
Use Scenario: Battery-powered pulse oximeter with analog front-end and Bluetooth LE MCU. IC Role / Device Role: Primary 3.0 V supply for signal chain and wireless SoC. Use Value: 125 µA quiescent current extends 2xAA alkaline battery life beyond 12 months in sleep mode. |
Use Scenario: Ruggedized barcode scanner operating in warehouse environments from −20°C to +60°C. IC Role / Device Role: Regulated 3.0 V rail for CMOS image sensor and laser driver IC. Use Value: Stable 3.0 V output with ±2% tolerance over temperature ensures consistent sensor gain and laser threshold control. |
| Smart Energy Meters | Automotive Body Control Modules |
|
Use Scenario: DIN-rail mounted electricity meter with real-time clock, metrology ASIC, and RS-485 interface. IC Role / Device Role: Secondary LDO supplying isolated 3.0 V to metrology section from 5 V system rail. Use Value: 65 dB ripple rejection prevents switching noise from DC-DC converter from corrupting 24-bit ADC measurements. |
Use Scenario: Non-safety-critical interior lighting controller using 12 V vehicle battery as input source. IC Role / Device Role: Local 3.0 V regulator for CAN transceiver and microcontroller I/O buffers. Use Value: DPAK-3 thermal pad enables reliable operation up to +105°C ambient without external heatsink. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP1117DT30T5G | 3.0 V, 1 A output, SO-8 package, 1.2 V dropout at 1 A - higher current but larger dropout and package size. | Used where >300 mA load or SO-8 layout reuse is required; not drop-in due to different pinout and thermal profile. | Select when higher output current is needed and board area allows SO-8; verify thermal design with RJA = 160°C/W. |
| MCP1700T-3002E/MB | 3.0 V, 250 mA, SOT-23-5 package, 175 mV dropout at 250 mA, 1.6 µA quiescent current - lower IQ but lower current rating. | Preferred for ultra-low-power sensor nodes where <250 mA suffices and SOT-23 footprint is constrained. | Choose for sub-250 mA applications prioritizing nanoamp IQ; not suitable for 300 mA peak loads or DPAK thermal requirements. |
Compared with NCP1117DT30T5G and MCP1700T-3002E/MB, the MC33275DT-3.0 uniquely balances 300 mA capability, 260 mV dropout, DPAK thermal performance, and industrial temperature range - making it optimal for mid-power portable equipment where space, efficiency, and reliability intersect.
Availability
MC33275DT-3.0 is available at Aetrix Electronics and suitable for portable medical devices, industrial handheld scanners, smart energy meters, and automotive body control modules requiring stable component supply and long-term manufacturability.
Supply support for MC33275DT-3.0 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, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MC33275DT-3.0 belongs to onsemi's micropower LDO family engineered for battery longevity and robustness in harsh environments - targeting applications where low dropout, wide temperature operation, and integrated protection are non-negotiable.
FAQ
What is the maximum input voltage for MC33275DT-3.0?
The MC33275DT-3.0 supports a maximum input voltage of 13 V DC, as specified in its Absolute Maximum Ratings table. Operation above this level risks permanent damage. For reliable long-term use, design input rails to remain ≤12 V under worst-case conditions including ripple and transients.
Does MC33275DT-3.0 require an input capacitor?
Yes, MC33275DT-3.0 requires an input bypass capacitor - typically ≥0.33 µF ceramic - placed directly across Vin and GND pins. This improves transient response and reduces sensitivity to high-frequency line impedance, especially when connected via long traces or cables to upstream supplies.
Can MC33275DT-3.0 operate with only 0.33 µF output capacitance?
Yes, MC33275DT-3.0 is stable with as little as 0.33 µF ceramic output capacitance for its 3.0 V version, per the datasheet's APPLICATIONS INFORMATION section. This value must be placed within 5 mm of the Vout and GND pins to ensure phase margin and avoid oscillation.
What happens during thermal shutdown on MC33275DT-3.0?
When the junction temperature reaches ~150°C, MC33275DT-3.0 disables its output without hysteresis. As temperature drops below threshold, output resumes - causing visible output cycling if overload persists. This behavior protects the die but requires proper PCB copper area or heatsinking to avoid repeated cycling.
Is MC33275DT-3.0 pin-compatible with other MC33275 variants?
No - MC33275DT-3.0 (DPAK-3) has a distinct 4-pin layout incompatible with SOIC-8 (MC33275D-3.0R2G), SOT-223 (MC33275ST-3.0T3G), or DFN-8 (MC33275MN-3.0R2G) variants. Each package type has unique pin assignments and thermal characteristics; PCB redesign is required for substitution.
MC33275DT-3.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tube
- 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:
- DPAK
MC33275DT-3.0 FAQ
1.How can I place an order for MC33275DT-3.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33275DT-3.0 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-3.0 reliable?
The price and inventory of MC33275DT-3.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33275DT-3.0 is usually 5 days.
3.What payment methods are accepted for MC33275DT-3.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33275DT-3.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33275DT-3.0?
MC33275DT-3.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33275DT-3.0 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-3.0?
For technical support, including MC33275DT-3.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33275DT-3.0 requirements.
6.How does Aetrix verify that MC33275DT-3.0 is sourced from the original manufacturer or authorized distributors?
All MC33275DT-3.0 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-3.0 meets industry standards.
7.What is the process for return or replacement of MC33275DT-3.0?
All MC33275DT-3.0 units undergo pre-shipment inspection (PSI). If there is an issue with MC33275DT-3.0, 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-3.0 part is unused and in its original packaging.
Return procedure for MC33275DT-3.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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