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onsemi MC33275DT-3.0RK
- Part No.:
- MC33275DT-3.0RK
- Manufacturer:
- onsemi
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MC33275DT-3.0RK.pdf
- Description:
- IC REG LINEAR 3V 300MA DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:3,147
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Product details
Overview
MC33275DT-3.0RK 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 stable operation with only 0.33 µF output capacitance - ideal for battery-powered handheld instruments requiring extended runtime and low quiescent current (125 µA typical).
For engineers reviewing the MC33275DT-3.0RK datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at full load, thermal shutdown threshold (150°C), input voltage range (up to 13 V), output tolerance (±2% over −40°C to +125°C), and compatibility with low-ESR ceramic capacitors.
Technical Context
The MC33275DT-3.0RK uses a PNP pass transistor architecture enabling low dropout performance without external compensation. Its internal bandgap reference (1.23 V) and feedback network set the precise 3.0 V output, with line regulation of ≤10 mV across 4.0–12 V input range.
Thermal protection activates at 150°C junction temperature with no hysteresis, causing output oscillation until cooling occurs. Current limiting is fixed at 450 mA and operates independently of thermal shutdown - both features are fully integrated and require no external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V ±2% over −40°C to +125°C - ensures stable MCU core or sensor supply under wide ambient and load variation. |
| Max Output Current | 300 mA continuous - supports moderate-power peripherals like LCD drivers or RF front-ends without derating. |
| Dropout Voltage | 260 mV at 300 mA - enables operation down to Vin = 3.26 V, critical for single-cell Li-ion or 3×AA systems near end-of-discharge. |
| Quiescent Current | 125 µA typical at zero load - minimizes standby power loss in always-on battery applications. |
| Ripple Rejection | 65 dB at 120 Hz - suppresses AC ripple from switching pre-regulators or noisy DC sources feeding the LDO. |
| Thermal Shutdown | 150°C junction - protects against sustained overload or poor PCB heatsinking without external thermal sensors. |
| Input Voltage Range | 2.5 V to 13 V - accommodates wide-input industrial supplies while maintaining regulation during brownouts. |
Pinout & Package
DPAK-3 (Case 369C) surface-mount package with exposed thermal pad; 6.10 × 6.54 × 2.28 mm footprint, 2.29 mm pitch, Pb-free (RoHS compliant). Thermal resistance: RJA = 92°C/W (with 1.0 oz Cu), RJC = 6.0°C/W.
| 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 conduction. |
| 3 | Output (Vout) | Regulated 3.0 V output; drives load directly; requires 0.33 µF minimum ceramic capacitor placed adjacent to pin. |
| 4 | Exposed Pad | Thermal and electrical ground; soldered to large copper pour for heat dissipation and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 25 mV at 10 mA load - preserves regulation even when input drops below 3.025 V, extending usable battery life. |
| Stable with minimal capacitance | 0.33 µF ceramic output cap - eliminates need for bulky tantalum or electrolytic capacitors, reducing BOM cost and board area. |
| Integrated protection | Current limit (450 mA) + thermal shutdown (150°C) - prevents damage during short-circuit or overheating without external circuitry. |
| Tight regulation | Line regulation ≤10 mV, load regulation ≤25 mV - maintains consistent voltage across varying input and load conditions for precision analog circuits. |
| Pb-free & automotive-ready | AEC-Q100 qualified variant available (NCV33275); this part meets RoHS and JESD22-A114 reliability standards. |
Applications
| Portable Medical Sensors | Industrial Handheld Scanners |
|---|---|
Use Scenario: Battery-powered pulse oximeter with analog front-end and Bluetooth LE radio. IC Role / Device Role / Timing Role: Primary 3.0 V supply for ADC, op-amps, and BLE SoC; replaces switching regulator to eliminate EMI-sensitive noise. Use Value: 125 µA quiescent current extends 2xAA alkaline battery life to >12 months in sleep mode; 260 mV dropout enables operation until battery reaches 3.26 V. | Use Scenario: Rugged barcode scanner used in warehouse logistics with intermittent high-current motor and display loads. IC Role / Device Role / Timing Role: Post-regulator delivering clean 3.0 V to microcontroller and CMOS image sensor after buck converter. Use Value: 65 dB ripple rejection attenuates switching noise from upstream DC/DC, preventing image artifacts; thermal shutdown prevents latch-up during motor stall events. |
| Smart Home Remote Controls | Automotive Body Control Modules |
Use Scenario: IR/RF remote with multi-sensor fusion (accelerometer, temp, humidity) and coin-cell battery. IC Role / Device Role / Timing Role: Single-point 3.0 V regulator powering mixed-signal SoC and sensors; operates from 2.5–3.6 V input range. Use Value: Stable 3.0 V output with ±2% tolerance ensures accurate ADC readings across temperature; 0.33 µF cap allows ultra-thin PCB design. | Use Scenario: Low-power door module controlling window lift, mirror fold, and interior lighting in 12 V automotive system. IC Role / Device Role / Timing Role: Secondary LDO supplying 3.0 V to CAN transceiver and microcontroller I/O banks from main 5 V rail. Use Value: AEC-Q100-compliant NCV variant available; 150°C thermal shutdown withstands under-hood temperature excursions without failure. |
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 output, higher dropout (1.2 V at full load), SO-8 package, no thermal oscillation behavior. | Better for higher-current loads but unsuitable for ultra-low-Vin battery systems due to 1.2 V dropout. | Select when >300 mA load current is required and input headroom exceeds 1.5 V. |
| MCP1700T-3002E/MB | 250 mA max, 1.6 µA quiescent current, SOT-23 package, no current limit or thermal shutdown. | Superior for ultra-low-power wake-on-event designs but lacks protection for fault-prone environments. | Select only for sub-250 mA, always-off applications where protection is handled externally. |
Compared with NCP1117ST30T3G and MCP1700T-3002E/MB, the MC33275DT-3.0RK uniquely balances 300 mA capability, 260 mV dropout, integrated protection, and DPAK thermal performance - making it optimal for mid-power battery systems needing robustness and efficiency.
Availability
MC33275DT-3.0RK is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld scanners, smart home remotes, and automotive body control modules requiring stable component supply and long-term manufacturability.
Supply support for MC33275DT-3.0RK 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 MC33275 series belongs to onsemi's micropower LDO portfolio, designed specifically for battery-operated equipment where extended runtime, low-noise regulation, and robust fault protection are essential.
FAQ
What is the maximum input voltage rating for MC33275DT-3.0RK?
The MC33275DT-3.0RK has an absolute maximum input voltage of 13 V DC. Exceeding this value risks permanent damage. For reliable operation, maintain Vin ≤13 V and ensure transient spikes are clamped by external TVS diodes if the source exhibits surge events.
Does MC33275DT-3.0RK require an external capacitor for stability?
Yes - MC33275DT-3.0RK requires a minimum 0.33 µF ceramic output capacitor placed adjacent to the Vout and GND pins. Input bypass (≥0.33 µF) is also recommended when trace length exceeds 4 inches or when fed from a high-impedance source.
What happens when MC33275DT-3.0RK enters thermal shutdown?
When the junction temperature reaches 150°C, MC33275DT-3.0RK disables its output with no hysteresis. The output toggles on/off as temperature cycles above/below threshold - appearing as oscillation. This behavior protects the die but requires adequate PCB copper area or airflow to sustain continuous operation.
Is MC33275DT-3.0RK pin-compatible with other MC33275 variants?
No - MC33275DT-3.0RK (DPAK-3) is not pin-compatible with SOIC-8 (MC33275D-3.0R2G) or SOT-223 (MC33275ST-3.0T3G) variants. Pin count, layout, and thermal pad configuration differ; PCB redesign is required for package substitution.
What is the output voltage tolerance of MC33275DT-3.0RK over temperature?
MC33275DT-3.0RK guarantees ±2% output voltage tolerance over the full operating junction temperature range of −40°C to +125°C. At 25°C, typical tolerance is tighter (±1%), but system-level design must budget for the worst-case ±2% variation.
MC33275DT-3.0RK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- 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:
- DPAK
MC33275DT-3.0RK FAQ
1.How can I place an order for MC33275DT-3.0RK through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33275DT-3.0RK 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-3.0RK reliable?
The price and inventory of MC33275DT-3.0RK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33275DT-3.0RK is usually 5 days.
3.What payment methods are accepted for MC33275DT-3.0RK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33275DT-3.0RK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33275DT-3.0RK?
MC33275DT-3.0RK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33275DT-3.0RK 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-3.0RK?
For technical support, including MC33275DT-3.0RK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33275DT-3.0RK requirements.
6.How does Aetrix verify that MC33275DT-3.0RK is sourced from the original manufacturer or authorized distributors?
All MC33275DT-3.0RK 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-3.0RK meets industry standards.
7.What is the process for return or replacement of MC33275DT-3.0RK?
All MC33275DT-3.0RK units undergo pre-shipment inspection (PSI). If there is an issue with MC33275DT-3.0RK, 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-3.0RK part is unused and in its original packaging.
Return procedure for MC33275DT-3.0RK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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