My Inquiry
My Account
onsemi MC33275D-2.5
- Part No.:
- MC33275D-2.5
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC33275D-2.5.pdf
- Description:
- IC REG LINEAR 2.5V 300MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,062
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MC33275D-2.5 from onsemi is a fixed-output 2.5 V, 300 mA micropower low dropout (LDO) linear voltage regulator in SOIC-8 package. It delivers ultra-low dropout (25 mV at 10 mA; 260 mV at 300 mA), tight line/load regulation (<10 mV), and stable operation with only 0.33 µF output capacitance - ideal for battery-powered handheld instruments requiring extended runtime and low-noise 2.5 V supply.
For engineers reviewing the MC33275D-2.5 datasheet, pinout, applications, or equivalent options, key selection considerations include dropout performance at full load, thermal shutdown threshold (150°C), quiescent current (125–200 µA), output voltage tolerance (±2% over −40°C to +125°C), and compatibility with low-ESR ceramic capacitors.
Technical Context
The MC33275D-2.5 uses a PNP pass transistor architecture enabling low dropout and high PSRR (65–75 dB at 120 Hz). Its internal reference is trimmed to 1.23 V, and feedback network sets precise 2.5 V output via resistor ratio - no external components required. Thermal shutdown activates at 150°C with no hysteresis, causing output oscillation until junction cools.
It integrates current limiting (450 mA typical), anti-saturation protection, and operates across −40°C to +125°C ambient. Input voltage range is 2.5 V (min) to 13 V, supporting single-cell Li-ion, multi-cell alkaline, or regulated intermediate rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±2% over −40°C to +125°C - ensures reliable logic-level supply for 2.5 V microcontrollers and analog sensors. |
| Max Output Current | 300 mA continuous - sufficient for mid-power MCU cores, RF transceivers, or sensor signal chains. |
| Dropout Voltage | 260 mV at 300 mA - enables operation down to 2.76 V input, extending usable battery life in 3 V systems. |
| Quiescent Current | 125–200 µA - minimizes standby power loss in always-on portable devices. |
| Ripple Rejection | 65–75 dB at 120 Hz - suppresses AC ripple from switching pre-regulators or noisy DC sources. |
| Output Noise | 160 µVRMS (10 Hz–100 kHz) - suitable for noise-sensitive ADCs and precision references. |
| Thermal Shutdown | 150°C junction - protects against sustained overload or inadequate PCB copper area. |
Pinout & Package
MC33275D-2.5 is housed in an 8-pin SOIC-8 (Case 751, D suffix) surface-mount package with exposed pad for thermal enhancement. Pin 1 is marked by notch or dot; pins 4 and 5 are not connected (N/C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Input) | Vin | Main input supply connection; accepts 2.5–13 V; requires local 0.33 µF bypass capacitor. |
| 2 (N/C) | No Connect | Internally unconnected; must be left floating or tied to GND per layout best practice. |
| 3 (N/C) | No Connect | Internally unconnected; no electrical function; avoid routing signals here. |
| 4 (GND) | Ground | Power ground reference; connects to PCB ground plane; critical for stability and thermal conduction. |
| 5 (N/C) | No Connect | Internally unconnected; do not use for signal or thermal relief. |
| 6 (Output) | Vout | Regulated 2.5 V output; requires 0.33 µF ceramic capacitor placed within 2 mm of pin. |
| 7 (GND) | Ground | Secondary ground terminal; ties to same ground plane as Pin 4 for low-impedance return path. |
| 8 (GND) | Ground | Third ground terminal; enhances thermal dissipation and reduces ground bounce under dynamic load. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 25 mV @ 10 mA enables operation with minimal headroom - critical for single-cell Li-ion (2.7–4.2 V) systems. |
| Stable with 0.33 µF output cap | Eliminates need for large tantalum or electrolytic capacitors - reduces BOM cost and board space. |
| Integrated thermal shutdown | 150°C activation without hysteresis provides fail-safe protection during sustained overload or poor heatsinking. |
| Low quiescent current | 125 µA typical in active mode extends battery life in sleep-mode applications like remote sensors. |
| Pb-free SOIC-8 package | RoHS-compliant, lead-free finish (G suffix) meets global environmental compliance requirements. |
Applications
| Hand-Held Instruments | Camcorders and Cameras |
|---|---|
Use Scenario: Portable multimeters, thermal imagers, and handheld spectrum analyzers operating from AA/AAA batteries or Li-ion packs. IC Role / Device Role / Timing Role: Primary 2.5 V LDO supplying MCU, display driver, and precision ADC reference. Use Value: 260 mV dropout preserves usable battery voltage down to 2.76 V, extending measurement time per charge by >15% vs. higher-dropout regulators. | Use Scenario: Consumer camcorders and digital cameras with CMOS image sensors and video processors. IC Role / Device Role / Timing Role: Clean 2.5 V rail for image sensor analog front-end and ISP core logic. Use Value: 160 µVRMS output noise prevents fixed-pattern noise in captured images; 65+ dB PSRR rejects switching noise from DC-DC converters. |
| Battery-Powered Consumer Products | Industrial Data Loggers |
Use Scenario: Wireless headphones, smart remotes, and Bluetooth speakers powered by coin cells or small Li-ion batteries. IC Role / Device Role / Timing Role: Low-noise 2.5 V supply for audio DAC, Bluetooth SoC I/O, and touch controller. Use Value: 125 µA quiescent current enables >1-year shelf life in standby; 0.33 µF stability simplifies compact PCB layout. | Use Scenario: Ruggedized environmental monitors deployed in remote locations with primary battery backup. IC Role / Device Role / Timing Role: Regulated 2.5 V source for low-power MCU, temperature/humidity sensors, and LoRaWAN transceiver. Use Value: −40°C to +125°C operating range ensures reliability in outdoor enclosures; integrated current limit prevents damage during sensor short-circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP1117ST2.5T3G | 800 mA output, 1.2 V dropout @ 800 mA, SOIC-8, but higher IQ (6 mA) and larger min. output cap (10 µF). | Better for higher-current loads; unsuitable for ultra-low-power battery apps due to 48× higher quiescent current. | Select when >300 mA is needed and standby current is not critical. |
| MCP1700T-2502E/MB | 250 mA max, 1.6 µA IQ, SOT-23-3, but only 4% output tolerance and no thermal shutdown. | Superior for micropower sleep modes; lacks fault protection and thermal safety for industrial environments. | Choose for coin-cell applications where size and IQ dominate; avoid in thermally demanding or safety-critical designs. |
Compared with NCP1117ST2.5T3G and MCP1700T-2502E/MB, the MC33275D-2.5 uniquely balances 300 mA capability, 125 µA IQ, ±2% accuracy, and integrated thermal/current protection in SOIC-8 - making it optimal for industrial handhelds needing both runtime and robustness.
Availability
MC33275D-2.5 is available at Aetrix Electronics and suitable for battery-powered consumer products, hand-held instruments, and industrial data loggers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MC33275D-2.5 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 manufacturer specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and IoT markets.
The MC33275 series belongs to onsemi's precision linear regulator product line, designed specifically for battery-operated and thermally constrained applications where low dropout, micropower operation, and integrated protection are essential.
FAQ
What is the minimum input voltage required for MC33275D-2.5 to maintain regulation?
The MC33275D-2.5 requires a minimum input voltage of 2.5 V (equal to its output) plus the dropout voltage. At 300 mA load, dropout is 260 mV, so Vin(min) = 2.76 V. At light loads (10 mA), dropout drops to 25 mV, allowing Vin as low as 2.525 V while maintaining 2.5 V output regulation. This makes MC33275D-2.5 viable for near-dead-battery operation in 3 V systems.
Can MC33275D-2.5 operate with ceramic output capacitors?
Yes, MC33275D-2.5 is explicitly designed for stability with low-ESR ceramic capacitors. The datasheet specifies stable operation with ≥0.33 µF ceramic output capacitance for 2.5 V versions. Multilayer ceramic (MLCC) types are recommended, especially solid tantalum or appropriate MLCCs for sub-25°C operation. No series ESR is required - unlike older LDOs, MC33275D-2.5 does not need added resistance for phase margin.
Does MC33275D-2.5 include thermal shutdown protection?
Yes, MC33275D-2.5 incorporates an internal thermal shutdown circuit that activates at approximately 150°C junction temperature. Unlike protected LDOs with hysteresis, this device disables the output without hysteresis - causing visible oscillation (on/off cycling) during sustained thermal overload. This behavior is intentional and documented in the datasheet as a fail-safe mechanism to prevent permanent damage.
What is the output voltage tolerance of MC33275D-2.5 across temperature and load?
The MC33275D-2.5 has a guaranteed output voltage tolerance of ±2% over the full operating junction temperature range (−40°C to +125°C) and load current range (0–250 mA). At 25°C and nominal load, typical output is 2.50 V with ±25 mV (±1%) variation. This tight tolerance ensures compatibility with 2.5 V logic families and precision analog circuits without external trimming.
Is MC33275D-2.5 pin-compatible with other variants in the MC33275 family?
Yes, all MC33275 variants in the SOIC-8 (D suffix) package - including MC33275D-3.0R2G, MC33275D-3.3R2G, and MC33275D-5.0R2G - share identical pinout and footprint. Only the output voltage and marking differ. This allows design reuse across voltage rails without PCB revision, provided input voltage and load requirements remain compatible with the selected variant's specifications.
MC33275D-2.5 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):
- 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:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MC33275D-2.5 FAQ
1.How can I place an order for MC33275D-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33275D-2.5 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-2.5 reliable?
The price and inventory of MC33275D-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33275D-2.5 is usually 5 days.
3.What payment methods are accepted for MC33275D-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33275D-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33275D-2.5?
MC33275D-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33275D-2.5 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-2.5?
For technical support, including MC33275D-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33275D-2.5 requirements.
6.How does Aetrix verify that MC33275D-2.5 is sourced from the original manufacturer or authorized distributors?
All MC33275D-2.5 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-2.5 meets industry standards.
7.What is the process for return or replacement of MC33275D-2.5?
All MC33275D-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with MC33275D-2.5, 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-2.5 part is unused and in its original packaging.
Return procedure for MC33275D-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MC33275D-2.5 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
