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onsemi MC33275DT-5.0
- Part No.:
- MC33275DT-5.0
- Manufacturer:
- onsemi
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MC33275DT-5.0.pdf
- Description:
- IC REG LINEAR 5V 300MA DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:3,455
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Product details
Overview
MC33275DT-5.0 from onsemi is a fixed-output 5.0 V, 300 mA micropower low dropout (LDO) linear voltage regulator in DPAK-3 package. It delivers ultra-low dropout of 260 mV at full load, features internal current and thermal limiting, and operates across −40°C to +125°C for battery-powered industrial and consumer equipment.
For engineers reviewing the MC33275DT-5.0 datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 300 mA, quiescent current under 200 µA, output stability with ≥0.22 µF ceramic capacitor, and thermal shutdown at 150°C.
Technical Context
The MC33275DT-5.0 uses a PNP pass transistor architecture enabling low dropout operation down to 25 mV at 10 mA. Its internal reference is trimmed to ±1% at 25°C and ±2% over −40°C to +125°C, supporting stable regulation even with input voltage as low as 5.26 V at full load.
It integrates anti-saturation thermal protection and foldback current limiting (typ. 450 mA), with ground pin current rising only to 1.5 mA at 300 mA load. 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 | 5.0 V ±2% over −40°C to +125°C - ensures reliable logic-level supply for microcontrollers and sensors in wide-temperature environments. |
| Max Output Current | 300 mA - sufficient to power multiple ICs (e.g., MCU + peripheral ICs) from a single LDO stage. |
| Dropout Voltage | 260 mV at 300 mA - enables operation from 5.26 V input, extending usable battery life in 2-cell Li-ion or 4-cell alkaline systems. |
| Quiescent Current | 125–200 µA - minimizes standby power loss, critical for always-on IoT edge nodes and portable instrumentation. |
| Stability Capacitor | ≥0.22 µF ceramic - allows compact, low-ESR output filtering without tantalum; no external compensation required. |
| Ripple Rejection | 65 dB min at 120 Hz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Thermal Shutdown | 150°C - protects against sustained overload or poor PCB heatsinking; auto-recovery upon cooldown. |
Pinout & Package
DPAK-3 (Case 369C) surface-mount package with exposed thermal pad (pin 2 = GND, pin 3 = VOUT, pin 1 = VIN). Pin 4 is not connected (N/C). Thermal resistance RJA = 92°C/W (standard layout), RJC = 6.0°C/W - requires minimum 10 mm² copper pour under exposed pad for rated 300 mA operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input supply connection; must be bypassed with ≥0.33 µF capacitor near pin to suppress high-frequency noise. |
| 2 | GND | Power ground and thermal pad attachment point; must be soldered to ≥10 mm² internal/external copper for thermal performance. |
| 3 | VOUT | Regulated 5.0 V output; connects directly to load; output capacitor must be placed within 2 cm for stability. |
| 4 | N/C | No internal connection - electrically isolated; may be left unconnected or tied to GND for mechanical reinforcement only. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 25 mV at 10 mA load - enables regulation from near-output voltage, ideal for energy harvesting and low-voltage battery systems. |
| Tight line/load regulation | ≤10 mV line change, ≤25 mV load change - maintains stable 5.0 V despite input ripple or dynamic load steps in embedded control loops. |
| Internal protection | Current limit (450 mA typ.) + thermal shutdown (150°C) - eliminates need for external fuses or thermal sensors in space-constrained designs. |
| Pb-free & AEC-Q100 capable | NCV33275 variant qualified for automotive; MC33275DT-5.0 shares same die and DPAK package - supports industrial-grade reliability with traceable sourcing. |
| Low-noise operation | 46 µVRMS noise (10 Hz–100 kHz) with 200 µF cap - suitable for analog front-ends, ADC references, and RF subsystem biasing. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Powering low-power ECG front-end ASICs and BLE transceivers in handheld diagnostic devices. IC Role / Device Role: Primary 5.0 V rail generator from 2S Li-ion (6.0–8.4 V) or coin cell + boost converter. Use Value: 260 mV dropout extends usable battery range by >15% vs. legacy 350 mV LDOs; 125 µA IQ enables multi-week standby. |
Use Scenario: Supplying isolated 5.0 V logic for digital input conditioning circuits in DIN-rail mounted controllers. IC Role / Device Role: Local post-regulator after wide-input DC/DC, rejecting switching noise before FPGA or microcontroller rails. Use Value: 65 dB ripple rejection prevents false triggering in 24 V DC fieldbus interfaces; −40°C to +125°C rating ensures outdoor cabinet operation. |
| Handheld Test Instruments | Smart Home Hub Controllers |
Use Scenario: Providing clean 5.0 V to precision op-amps and 16-bit SAR ADCs in battery-operated multimeters. IC Role / Device Role: Low-noise analog supply rail decoupled from noisy digital domains. Use Value: 46 µVRMS output noise avoids SNR degradation; 0.22 µF ceramic stability simplifies BOM and layout. |
Use Scenario: Regulating 5.0 V for Wi-Fi SoC, USB peripherals, and LED drivers in always-connected residential gateways. IC Role / Device Role: High-current local LDO handling peak loads (e.g., Wi-Fi transmit bursts up to 300 mA). Use Value: Foldback current limiting prevents thermal runaway during simultaneous USB + RF activity; DPAK thermal pad enables convection-only cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-5002E/MB | 250 mA max, 600 mV dropout at 250 mA, SOIC-8 package, 4 µA IQ | Lower current, higher dropout, ultra-low IQ - better for <100 mA always-on sensors, worse for burst-load apps | Select when standby current dominates design; avoid if >250 mA peak load or input <5.6 V is expected. |
| NCP1117ST50T3G | 1 A max, 1.2 V dropout at 800 mA, SOT-223, 6 mA IQ, no thermal foldback | Higher current, much higher dropout and IQ - suited for non-battery, high-power industrial use | Select for cost-sensitive 1 A applications where thermal margin is ample; avoid in battery or low-noise designs. |
Compared with MCP1703T-5002E/MB, MC33275DT-5.0 delivers 20% higher current and 2.3× lower dropout at full load, enabling smaller batteries. Versus NCP1117ST50T3G, it cuts quiescent current by 30× and improves noise by 15 dB - critical for portable and precision analog systems.
Availability
MC33275DT-5.0 is available at Aetrix Electronics and suitable for battery-powered consumer products, handheld instruments, and industrial control modules requiring stable component supply with long-term lifecycle support.
Supply support for MC33275DT-5.0 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 focused on energy-efficient electronics, with leadership in power management, analog, and sensing technologies.
The MC33275 series belongs to onsemi's precision linear regulator product line, designed specifically for micropower, low-dropout operation in battery-critical and thermally constrained applications across automotive, industrial, and portable markets.
FAQ
What is the minimum input voltage required for MC33275DT-5.0 to maintain regulation at 300 mA?
The MC33275DT-5.0 requires a minimum input voltage of 5.26 V to maintain 5.0 V output regulation at 300 mA load, based on its maximum dropout voltage of 260 mV. This allows operation from partially discharged 2-cell Li-ion (6.0–8.4 V nominal) or 4-cell alkaline (6.0 V fresh) sources while preserving headroom for line transient suppression.
Can MC33275DT-5.0 be used with ceramic output capacitors, and what is the minimum value?
Yes, MC33275DT-5.0 is stable with ceramic output capacitors as low as 0.22 µF for the 5.0 V version. The datasheet explicitly specifies this value and confirms compatibility with multilayer ceramic, tantalum, and aluminum electrolytic types - no ESR requirements or external compensation needed.
Does MC33275DT-5.0 include reverse polarity or reverse current protection?
No, MC33275DT-5.0 does not integrate reverse polarity or reverse current protection. It lacks internal blocking diodes or MOSFETs for backfeed prevention. External protection (e.g., series Schottky diode or ideal diode controller) is required if the output may exceed input voltage during fault conditions or hot-swap events.
How does thermal shutdown behave in MC33275DT-5.0 during sustained overload?
MC33275DT-5.0 thermal shutdown activates at ~150°C with no hysteresis. During sustained overload, the device cycles on/off as junction temperature crosses the threshold - output appears to oscillate. This is intentional behavior per datasheet; proper PCB copper area and airflow are required to avoid continuous cycling and ensure safe operation.
Is MC33275DT-5.0 pin-compatible with other variants in the MC33275 family?
Yes, all MC33275 variants (e.g., MC33275DT-2.5, MC33275DT-3.3, MC33275DT-5.0) share identical DPAK-3 pinout (VIN, GND, VOUT, N/C) and thermal pad layout. Output voltage is laser-trimmed during test; no external components differ - enabling drop-in replacement across voltage options in same footprint.
MC33275DT-5.0 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):
- 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-5.0 FAQ
1.How can I place an order for MC33275DT-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33275DT-5.0 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-5.0 reliable?
The price and inventory of MC33275DT-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33275DT-5.0 is usually 5 days.
3.What payment methods are accepted for MC33275DT-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33275DT-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33275DT-5.0?
MC33275DT-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33275DT-5.0 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-5.0?
For technical support, including MC33275DT-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33275DT-5.0 requirements.
6.How does Aetrix verify that MC33275DT-5.0 is sourced from the original manufacturer or authorized distributors?
All MC33275DT-5.0 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-5.0 meets industry standards.
7.What is the process for return or replacement of MC33275DT-5.0?
All MC33275DT-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with MC33275DT-5.0, 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-5.0 part is unused and in its original packaging.
Return procedure for MC33275DT-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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