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onsemi MC33375D-2.5R2
- Part No.:
- MC33375D-2.5R2
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC33375D-2.5R2.pdf
- Description:
- IC REG LINEAR 2.5V 300MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,891
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Product details
Overview
MC33375D-2.5R2 from onsemi is a micropower, low-dropout linear voltage regulator delivering a fixed 2.5 V output at up to 300 mA, featuring logic-level ON/OFF control, 25 mV dropout at 10 mA load, ±2% output tolerance over −40 °C to +125 °C, and internal thermal/current limiting-designed for battery-powered industrial sensors and portable instrumentation.
For engineers reviewing the MC33375D-2.5R2 datasheet, pinout, applications, or equivalent options, key selection criteria include dropout performance at light-to-full load, quiescent current in ON/OFF modes (125 µA / 0.3 µA), stability with minimal 0.33 µF output capacitance, and SOIC-8 package thermal characteristics under constrained PCB copper area.
Technical Context
The MC33375D-2.5R2 employs a PNP pass transistor architecture enabling ultra-low dropout voltage and micropower operation. Its ON/OFF control pin directly enables/disables regulation without external circuitry, with logic "1" threshold ≥2.4 V and logic "0" threshold ≤0.5 V.
Internal protection includes foldback current limiting (typ. 450 mA) and thermal shutdown at 150 °C with no hysteresis. Output stability is guaranteed with ≥0.33 µF ceramic/tantalum capacitor and supports ripple rejection of 65 dB at 120 Hz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.50 V ±2% over −40 °C to +125 °C - ensures stable MCU core or ADC reference supply across automotive/industrial temperature ranges. |
| Dropout Voltage | 25 mV at 10 mA; 260 mV at 300 mA - enables operation from single-cell Li-ion (3.0 V min) or 3.3 V rail with margin. |
| Quiescent Current | 125 µA (ON mode), 0.3 µA (OFF mode) - extends battery life in always-on sensor nodes with periodic wake-up cycles. |
| Load Regulation | 5.0 mV max (0–250 mA) - maintains tight voltage accuracy during dynamic load transients in microcontroller peripherals. |
| Line Regulation | 2.0 mV max (VO+1 V to 12 V input) - rejects input ripple from switching pre-regulators or noisy DC sources. |
| Ripple Rejection | 65 dB at 120 Hz - suppresses AC line-derived ripple in offline-powered industrial controllers. |
| Thermal Shutdown | 150 °C junction - protects against sustained overload or inadequate heatsinking in enclosed enclosures. |
Pinout & Package
MC33375D-2.5R2 is housed in an SOIC-8 (Case 751) Pb-free package with standard 1.27 mm pitch, 5.0 × 4.0 mm body, and exposed thermal pad not connected internally. Pin 1 is bottom-left corner (marking dot adjacent).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input (Vin) | Main power input; must be ≥2.525 V for regulation; requires local 0.33 µF bypass capacitor. |
| 2 | Ground (GND) | Analog ground reference; connect to low-impedance PCB ground plane near output capacitor. |
| 3 | Output (Vout) | Regulated 2.5 V supply; connects directly to load; output capacitor (≥0.33 µF) must be placed adjacent. |
| 4 | ON/OFF Control | Active-high enable: ≥2.4 V = ON, ≤0.5 V = OFF; must not float; pull-down resistor recommended. |
| 5 | Ground (GND) | Second ground terminal; electrically tied to Pin 2 internally; improves thermal conduction and noise immunity. |
| 6 | Ground (GND) | Third ground terminal; enhances thermal dissipation and reduces ground bounce under high di/dt loads. |
| 7 | Ground (GND) | Fourth ground terminal; provides additional low-inductance return path for output current. |
| 8 | Input (Vin) | Secondary input connection; internally tied to Pin 1; used for improved current sharing and thermal spreading. |
Key Features
| Feature | Design Value |
|---|---|
| Logic-level ON/OFF control | Direct interface with 3.3 V or 5 V GPIO without level-shifting; eliminates external MOSFET enable circuitry. |
| Stable with 0.33 µF output cap | Reduces BOM count and board space vs. competitors requiring ≥2.2 µF; compatible with small-case X5R/X7R ceramics. |
| Ultra-low OFF-mode IQ (0.3 µA) | Enables >10-year battery life in coin-cell–powered IoT endpoints with 1-minute wake-up intervals. |
| Internal thermal shutdown | Self-protects during solder reflow, short-circuit events, or ambient temperature excursions without external monitoring. |
| ±2% output tolerance over full temp range | Meets precision analog requirements for 12-bit ADC references and op-amp biasing without post-production trimming. |
Applications
| Portable Medical Sensors | Automotive Body Control Modules |
|---|---|
Use Scenario: Wearable ECG front-end powered by CR2032 coin cell with 10-second measurement bursts every 5 minutes. IC Role / Device Role / Timing Role: Primary 2.5 V LDO supplying analog signal chain (instrumentation amp, filter, ADC) and microcontroller core. Use Value: 0.3 µA OFF current extends battery life beyond 3 years; 25 mV dropout preserves headroom down to 2.525 V input. |
Use Scenario: Interior lighting controller in door module, operating from 9–16 V vehicle battery with transient suppression. IC Role / Device Role / Timing Role: Secondary 2.5 V regulator for CAN transceiver logic and microcontroller I/O bank. Use Value: 65 dB ripple rejection suppresses alternator noise; thermal shutdown prevents latch-up during load dump events. |
| Industrial Wireless Transmitters | Smart Energy Meters |
Use Scenario: LoRaWAN node with RF SoC and MEMS accelerometer, duty-cycled via RTC interrupt. IC Role / Device Role / Timing Role: Always-on 2.5 V rail for real-time clock, backup RAM, and wake-up logic; enables fast system boot. Use Value: 125 µA ON current minimizes standby loss; 0.33 µF stability allows use of 0402-size ceramic caps for compact layout. |
Use Scenario: Revenue-grade meter with isolated metrology IC and secure MCU, operating continuously for 15+ years. IC Role / Device Role / Timing Role: Precision 2.5 V reference for 24-bit sigma-delta ADC measuring voltage/current inputs. Use Value: ±2% output tolerance over −40 °C to +125 °C ensures metrology accuracy without calibration drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP1117ST2.5T3G | Fixed 2.5 V, 1 A output, 1.2 V dropout @ 1 A, SOIC-8, no ON/OFF pin | Higher current capability but lacks enable control; requires external logic for power sequencing | Select when >300 mA load or lower dropout at high current is needed; add discrete MOSFET for enable if required |
| MCP1700T-2502E/MB | 2.5 V, 250 mA, 6 µA IQ (ON), SOT-23-3, no ON/OFF pin, 170 mV dropout @ 250 mA | Ultra-low IQ but no enable; smaller footprint; higher dropout limits low-voltage battery use | Select for space-constrained, ultra-low-power applications where enable functionality is handled externally |
Compared with NCP1117ST2.5T3G and MCP1700T-2502E/MB, MC33375D-2.5R2 uniquely balances micropower operation (0.3 µA OFF), logic-enable capability, and sub-300 mV dropout at full 300 mA load in SOIC-8-making it optimal for battery-gated industrial sensing nodes requiring both low standby and robust active performance.
Availability
MC33375D-2.5R2 is available at Aetrix Electronics and suitable for portable medical sensors, automotive body control modules, industrial wireless transmitters, smart energy meters, and battery-backed data loggers requiring stable component supply with long-term lifecycle support.
Supply support for MC33375D-2.5R2 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 sensor technologies.
The MC33375 series was designed specifically for micropower, low-dropout regulation in battery-critical applications-emphasizing ultra-low quiescent current, wide temperature operation, and simplified external component requirements.
FAQ
What is the maximum input voltage rating for MC33375D-2.5R2?
The absolute maximum input voltage for MC33375D-2.5R2 is 13 V DC. Operation above this risks permanent damage. For reliable long-term use, keep input within 2.525 V to 12 V to maintain regulation and avoid excessive power dissipation in the SOIC-8 package.
Does MC33375D-2.5R2 require an external pull-up resistor on the ON/OFF pin?
Yes - the ON/OFF pin of MC33375D-2.5R2 must not be left floating. A 10–100 kΩ pull-up resistor to Vin is recommended to ensure reliable turn-on during power-up. Leaving it unconnected may cause erratic startup or unintended shutdown due to noise coupling.
Can MC33375D-2.5R2 operate stably with a 0.22 µF output capacitor?
No - MC33375D-2.5R2 requires ≥0.33 µF output capacitance for stability with 2.5 V output. A 0.22 µF capacitor is only specified for 5.0 V versions. Using undersized capacitance risks oscillation, especially under load transients or at temperature extremes.
Is MC33375D-2.5R2 pin-compatible with other devices in the MC33375 family?
Yes - all MC33375 D-suffix (SOIC-8) variants share identical pinout and footprint, including MC33375D-3.0G and MC33375D-3.3R2G. Voltage version changes require no PCB redesign, though output capacitor ESR and layout grounding should be verified per load conditions.
What is the thermal resistance (RJA) of MC33375D-2.5R2 in standard SOIC-8 layout?
In a standard JEDEC 2-layer board (1 oz. copper, 100 mm² pad), MC33375D-2.5R2 exhibits RJA ≈ 160 °C/W. With 2 oz. copper and extended thermal pad connections, RJA can improve to ~80 °C/W - critical for sustaining 300 mA at elevated ambient temperatures without thermal shutdown.
MC33375D-2.5R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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):
- 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:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MC33375D-2.5R2 FAQ
1.How can I place an order for MC33375D-2.5R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33375D-2.5R2 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 MC33375D-2.5R2 reliable?
The price and inventory of MC33375D-2.5R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33375D-2.5R2 is usually 5 days.
3.What payment methods are accepted for MC33375D-2.5R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33375D-2.5R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33375D-2.5R2?
MC33375D-2.5R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33375D-2.5R2 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 MC33375D-2.5R2?
For technical support, including MC33375D-2.5R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33375D-2.5R2 requirements.
6.How does Aetrix verify that MC33375D-2.5R2 is sourced from the original manufacturer or authorized distributors?
All MC33375D-2.5R2 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 MC33375D-2.5R2 meets industry standards.
7.What is the process for return or replacement of MC33375D-2.5R2?
All MC33375D-2.5R2 units undergo pre-shipment inspection (PSI). If there is an issue with MC33375D-2.5R2, 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 MC33375D-2.5R2 part is unused and in its original packaging.
Return procedure for MC33375D-2.5R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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