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onsemi MC33275D-3.0
- Part No.:
- MC33275D-3.0
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC33275D-3.0.pdf
- Description:
- IC REG LINEAR 3V 300MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,515
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Product details
Overview
MC33275D-3.0 from onsemi is a fixed-output 3.0 V, 300 mA low-dropout (LDO) linear voltage regulator in SOIC-8 package. It delivers ultra-low dropout voltage (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 MC33275D-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 compatibility with Pb-free PCB assembly per AEC-Q100 requirements for industrial-grade reliability.
Technical Context
The MC33275D-3.0 uses a PNP pass transistor architecture enabling low dropout operation down to 25 mV at 10 mA load. Its internal reference is trimmed to ±2% over −40°C to +125°C, and line regulation holds within ±10 mV across input voltages from (VOUT + 1) V to 12 V.
Stability is guaranteed with ≥0.33 µF ceramic or tantalum output capacitance and ESR ≤1 Ω at 300 mA load. The device integrates thermal shutdown (no hysteresis, cycles at ~150°C) and foldback current limiting (typ. 450 mA), eliminating need for external protection circuitry in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.00 V ±2% over −40°C to +125°C - ensures stable MCU core or sensor bias under wide temperature swings |
| Max Output Current | 300 mA continuous - sufficient for powering microcontrollers, RF modules, or small displays without external boost |
| Dropout Voltage | 260 mV at 300 mA - enables regulation from 3.26 V input, critical for single-cell Li-ion or 3.3 V rail margining |
| Quiescent Current | 125 µA typical at 0 mA load - minimizes standby power loss in battery-operated devices with long sleep cycles |
| Ripple Rejection | 65 dB at 120 Hz - suppresses AC ripple from switching supply inputs, preserving analog signal integrity |
| Thermal Shutdown | 150°C junction activation - protects against sustained overload or poor heatsinking without latch-up |
| Output Capacitance | 0.33 µF minimum - allows use of tiny, low-profile MLCCs, reducing board area and BOM count |
Pinout & Package
MC33275D-3.0 is housed in SOIC-8 (Case 751, D suffix), 4.9 mm × 3.9 mm × 1.5 mm body, Pb-free, RoHS-compliant surface-mount package with exposed pad not connected internally.
| 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 low-impedance connection to minimize noise coupling |
| 3 | Ground (GND) | Dual GND pin improves thermal conduction and reduces ground bounce in high-transient loads |
| 4 | Ground (GND) | Third GND terminal enhances PCB heat spreading and stabilizes regulation under dynamic load steps |
| 5 | No Connect (N/C) | Internally unconnected; must remain floating - no routing or stitching to avoid parasitic coupling |
| 6 | Output (Vout) | Regulated 3.0 V output; connects directly to load; output capacitor must be placed <2 cm away |
| 7 | No Connect (N/C) | Unused pin; leave unconnected per datasheet - not a test point or thermal pad |
| 8 | No Connect (N/C) | Non-functional terminal; no electrical or mechanical role - omit from layout netlist |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 25 mV at 10 mA enables operation from near-dead batteries or tightly regulated intermediate rails |
| Micro-power quiescent current | 125 µA typical supports >1-year battery life in always-on IoT sensors with 200 mAh coin cells |
| Minimal external components | Stable with only 0.33 µF output cap - eliminates need for expensive low-ESR tantalums or complex compensation |
| Integrated protection | Current limit (450 mA) + thermal shutdown (150°C) prevent field failures without discrete FETs or sense resistors |
| Automotive-ready variant path | NCV33275ST-3.0T3G is AEC-Q100 qualified - same electrical specs with PPAP-capable manufacturing control |
Applications
| Portable Medical Sensors | Industrial Handheld Scanners |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) using low-power ADC and BLE SoC powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Primary 3.0 V LDO supplying analog front-end and digital logic; maintains regulation during BLE transmit bursts. Use Value: 260 mV dropout allows >30% longer runtime vs. legacy 3.3 V regulators when battery drops below 3.3 V. |
Use Scenario: Rugged barcode scanner with motor-driven trigger, OLED display, and 2D imager ASIC. IC Role / Device Role / Timing Role: Local 3.0 V rail for imager sensor and display controller; handles 200 mA pulsed loads during scan initiation. Use Value: Dual-GND pins reduce ground shift during motor commutation, preventing image corruption or reset glitches. |
| Wireless Sensor Nodes | Automotive Body Control Modules |
Use Scenario: LoRaWAN node monitoring temperature/humidity with ultra-low-duty-cycle sleep mode. IC Role / Device Role / Timing Role: Always-on 3.0 V supply for RTC and wake-up circuitry; quiescent current dominates total system leakage. Use Value: 125 µA IQ cuts annual self-discharge by 40% compared to 200 µA alternatives, extending 10-year deployment target. |
Use Scenario: Door module controlling LED status indicators, window lift motor drivers, and LIN transceiver. IC Role / Device Role / Timing Role: Secondary 3.0 V rail for LIN PHY and indicator LEDs; survives load-dump transients up to 13 V. Use Value: 13 V absolute max input rating and thermal cycling robustness meet ISO 7637-2 Pulse 5a requirements without clamping diodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV70030DDCR | 200 mA max output, 170 mV dropout at 200 mA, 35 µA IQ - lower current, lower IQ, smaller SOT-23-5 package | Suitable for sub-100 mA logic rails; insufficient for 300 mA camera modules or motor drivers | Select TLV70030DDCR only if load current ≤200 mA and board space is constrained; verify thermal derating at 125°C ambient |
| NCP1117ST30T3G | 1 A output, 1.2 V dropout at 800 mA, 6 mA IQ - higher current, higher dropout, TO-220/SOT-223 package | Better for high-current analog supplies but consumes 48× more quiescent current - unsuitable for battery longevity | Choose NCP1117ST30T3G only for mains-powered systems where efficiency > battery life; avoid in portable designs |
Compared with TLV70030DDCR and NCP1117ST30T3G, MC33275D-3.0 uniquely balances 300 mA capability, ultra-low dropout (260 mV), and micropower IQ (125 µA) in a compact SOIC-8 - making it optimal for mid-power portable electronics where both runtime and peak load support matter.
Availability
MC33275D-3.0 is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld scanners, and wireless sensor nodes requiring stable component supply with automotive-grade traceability and extended temperature support.
Supply support for MC33275D-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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The MC33275 series belongs to onsemi's precision analog LDO portfolio, engineered specifically for battery-powered equipment demanding micropower operation, wide temperature resilience, and robust integrated protection - not general-purpose regulation.
FAQ
What is the maximum input voltage for MC33275D-3.0?
The MC33275D-3.0 supports a maximum input voltage of 13 V DC, as specified in its Absolute Maximum Ratings table. This rating allows safe operation with common 12 V supply rails and transient-tolerant designs. Exceeding 13 V risks permanent damage, even briefly, due to internal junction breakdown limits. Always maintain ≥0.5 V headroom above VOUT for regulation, and ensure input filtering prevents overshoot beyond 13 V.
Can MC33275D-3.0 operate with a 0.22 µF output capacitor?
No - MC33275D-3.0 requires a minimum of 0.33 µF output capacitance for stability with 3.0 V output, per the Applications Information section. While 5.0 V versions accept 0.22 µF, the 3.0 V variant mandates ≥0.33 µF ceramic or tantalum capacitor with ESR ≤1 Ω. Using 0.22 µF may cause oscillation or load-step instability, especially above 100 mA load current.
Does MC33275D-3.0 have built-in reverse polarity protection?
No, MC33275D-3.0 does not include reverse polarity protection. The device will be damaged if Vin is connected to ground and GND to a positive voltage. External protection - such as a series Schottky diode or PMOS FET - must be added in systems where incorrect battery insertion or wiring reversal is possible. The internal protection covers only overcurrent and overtemperature, not reverse bias.
How does thermal shutdown behave on MC33275D-3.0 during sustained overload?
MC33275D-3.0 thermal shutdown activates at ~150°C junction temperature with no hysteresis. During sustained overload, the output toggles on/off as temperature crosses the threshold - appearing as output oscillation. This cycling continues until ambient cooling or reduced load lowers junction temperature below 150°C. It is not a latch-off feature; proper PCB copper area and airflow are required to avoid repeated cycling.
Is MC33275D-3.0 pin-compatible with other MC33275 variants like MC33275ST-3.0?
No - MC33275D-3.0 (SOIC-8) is not pin-compatible with MC33275ST-3.0 (SOT-223) or MC33275DT-3.0 (DPAK). Each package has distinct pin counts, layouts, and terminal functions. For example, SOIC-8 has three GND pins and two N/C terminals, while SOT-223 has only three pins (Vin, Vout, GND). PCB redesign is required when changing packages; only electrical specs are shared across the family.
MC33275D-3.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 8-SOIC
MC33275D-3.0 FAQ
1.How can I place an order for MC33275D-3.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33275D-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 MC33275D-3.0 reliable?
The price and inventory of MC33275D-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 MC33275D-3.0 is usually 5 days.
3.What payment methods are accepted for MC33275D-3.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33275D-3.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33275D-3.0?
MC33275D-3.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33275D-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 MC33275D-3.0?
For technical support, including MC33275D-3.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33275D-3.0 requirements.
6.How does Aetrix verify that MC33275D-3.0 is sourced from the original manufacturer or authorized distributors?
All MC33275D-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 MC33275D-3.0 meets industry standards.
7.What is the process for return or replacement of MC33275D-3.0?
All MC33275D-3.0 units undergo pre-shipment inspection (PSI). If there is an issue with MC33275D-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 MC33275D-3.0 part is unused and in its original packaging.
Return procedure for MC33275D-3.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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