My Inquiry
My Account
onsemi MC33275DT-2.5
- Part No.:
- MC33275DT-2.5
- Manufacturer:
- onsemi
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MC33275DT-2.5.pdf
- Description:
- IC REG LINEAR 2.5V 300MA DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:4,643
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MC33275DT-2.5 from onsemi is a fixed-output, 2.5 V, 300 mA micropower low dropout (LDO) linear voltage regulator in DPAK-3 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 rail.
For engineers reviewing the MC33275DT-2.5 datasheet, pinout, applications, or equivalent options, key selection criteria include dropout performance at full load, thermal shutdown behavior at 150°C, quiescent current (125 µA typical), and compatibility with minimal ceramic output capacitance in space-constrained portable designs.
Technical Context
The MC33275DT-2.5 employs a PNP pass transistor architecture enabling sub-100 mV dropout at light loads and robust 260 mV dropout at 300 mA across −40°C to +125°C. Its internal thermal shutdown activates at 150°C without hysteresis, causing output oscillation until junction cooling occurs.
It features internal current limiting (450 mA typical), no external compensation required, and operates stably with 0.33 µF ceramic output capacitors - eliminating need for tantalum or electrolytic types. Ripple rejection exceeds 65 dB at 120 Hz, and output noise is 160 µVRMS (10 Hz–100 kHz) with 1 µF capacitor.
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 sensors. |
| Max Output Current | 300 mA continuous - supports moderate-power peripherals like ADCs, RF front-ends, or small displays. |
| Dropout Voltage | 260 mV at 300 mA - enables operation down to 2.76 V input, critical for single-cell Li-ion or two-cell alkaline systems. |
| Quiescent Current | 125 µA typical at 0 mA load - minimizes standby power loss in always-on battery applications. |
| Line Regulation | ≤10 mV over 3.5 V to 12 V input - maintains stable output despite battery voltage sag or supply ripple. |
| Load Regulation | ≤25 mV from 0 to 250 mA - prevents voltage droop during dynamic load transients in portable electronics. |
| Ripple Rejection | ≥65 dB at 120 Hz - suppresses switching noise from upstream DC/DC converters feeding the LDO. |
Pinout & Package
DPAK-3 (Case 369A) surface-mount package with exposed thermal pad; 6.10 × 6.54 × 2.28 mm footprint, 2.29 mm pitch; designed for high thermal conductivity via PCB copper pour under exposed pad.
| 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 | Output (Vout) | Regulated 2.5 V output; connects directly to load; requires 0.33 µF ceramic capacitor to ground. |
| 4 | Exposed Pad | Thermal and electrical ground; soldered to PCB copper area for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 25 mV at 10 mA load - enables operation with minimal headroom, extending usable battery range. |
| Stable with minimal capacitance | 0.33 µF ceramic output cap - reduces BOM cost and board area vs. traditional tantalum solutions. |
| Integrated protection | Current limit (450 mA) and thermal shutdown (150°C) - eliminates need for external fault management circuitry. |
| Low-noise regulation | 160 µVRMS output noise (10 Hz–100 kHz) - suitable for noise-sensitive analog circuits and precision ADCs. |
| Pb-free & automotive-ready | AEC-Q100 capable variant (NCV33275) available - supports industrial and automotive temperature-grade requirements. |
Applications
| Hand-Held Instruments | Camcorders & Digital Cameras |
|---|---|
Use Scenario: Portable multimeters, thermal imagers, and handheld spectrum analyzers powered by 2×AA/AAA or single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Primary 2.5 V supply for microcontroller, analog front-end, and display driver ICs. Use Value: 260 mV dropout allows >90% battery utilization; 125 µA quiescent current extends shelf life in sleep mode. |
Use Scenario: Image sensor biasing and digital signal processor core supply in compact camcorders and DSLR accessories. IC Role / Device Role / Timing Role: Clean, low-noise 2.5 V rail for CMOS image sensor analog blocks and FPGA I/O banks. Use Value: 160 µVRMS output noise prevents image banding; 0.33 µF stability enables ultra-thin camera module PCBs. |
| Battery-Powered Consumer Products | Industrial Data Loggers |
Use Scenario: Wireless remote controls, smart thermostats, and Bluetooth audio transmitters operating from coin cells or alkaline packs. IC Role / Device Role / Timing Role: Main system regulator delivering regulated 2.5 V to BLE SoC, EEPROM, and sensor interface. Use Value: 25 mV dropout at light load preserves battery capacity during long idle periods; Pb-free DPAK simplifies RoHS compliance. |
Use Scenario: Ruggedized environmental monitors deployed in remote locations with wide ambient temperature swings (−40°C to +85°C). IC Role / Device Role / Timing Role: Stable 2.5 V reference and supply for precision ADCs, RTDs, and isolated UART transceivers. Use Value: ±2% output tolerance over full temperature range ensures measurement accuracy; thermal shutdown prevents field failure in sealed enclosures. |
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 | Higher dropout (1.1 V typical at 800 mA), SO-8 package, 1.1 A rating - less efficient at low input voltage. | Preferred where higher current or legacy SO-8 layout exists; unsuitable for <3.6 V input systems. | Select when >300 mA load or existing SO-8 footprint is mandatory; avoid if minimizing input headroom is critical. |
| MCP1700T-2502E/MB | Lower IQ (1.6 µA), SOT-23-3, 250 mA max - optimized for ultra-low-power but lower current capability. | Better for coin-cell devices with intermittent wake-up; insufficient for sustained 300 mA loads. | Choose for sub-µA standby applications; reject if peak load exceeds 250 mA or thermal performance at 300 mA is required. |
Compared with NCP1117ST2.5T3G and MCP1700T-2502E/MB, the MC33275DT-2.5 uniquely balances 300 mA capability, 260 mV dropout, and 125 µA quiescent current in DPAK - making it optimal for mid-power portable equipment where efficiency, size, and thermal margin are jointly constrained.
Availability
MC33275DT-2.5 is available at Aetrix Electronics and suitable for battery-powered consumer products, handheld instruments, camcorders and cameras, and industrial data loggers requiring stable component supply with guaranteed long-term sourcing.
Supply support for MC33275DT-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 supplier specializing in energy-efficient power management, analog, and sensing technologies for automotive, industrial, and consumer markets.
The MC33275DT-2.5 belongs to onsemi's micropower LDO regulator family, engineered for battery longevity and reliability in portable and harsh-environment electronics - emphasizing low dropout, minimal external components, and integrated protection.
FAQ
What is the minimum input voltage required for MC33275DT-2.5 to maintain regulation at 300 mA?
The MC33275DT-2.5 requires a minimum input voltage of 2.76 V to sustain 2.5 V output at 300 mA load, based on its maximum dropout voltage of 260 mV. Below this, output voltage drops linearly with input; operation below 2.5 V input is not functional. The absolute maximum input is 13 V.
Can MC33275DT-2.5 operate with a 0.22 µF output capacitor?
No - the MC33275DT-2.5 requires ≥0.33 µF output capacitance for stability with 2.5 V output. While 5.0 V versions accept 0.22 µF, the 2.5 V variant's internal compensation mandates 0.33 µF minimum. Using smaller values risks oscillation and output instability under load transients.
Does MC33275DT-2.5 have reverse polarity or reverse current protection?
No - the MC33275DT-2.5 lacks built-in reverse polarity or reverse current protection. If input voltage can fall below output (e.g., during battery swap), an external Schottky diode between input and output is recommended to prevent backfeed and potential damage to upstream circuitry.
How does thermal shutdown behave in MC33275DT-2.5 during sustained overload?
When junction temperature reaches 150°C, MC33275DT-2.5 disables output with no hysteresis. As temperature drops below threshold, output re-enables - causing visible oscillation in output voltage. This cycling continues until thermal equilibrium is achieved, indicating inadequate heatsinking or excessive power dissipation.
Is MC33275DT-2.5 compatible with ceramic capacitors having ESR <10 mΩ?
Yes - the MC33275DT-2.5 is explicitly designed for low-ESR ceramic capacitors. Its stability is verified with 0.33 µF X7R/X5R ceramics (typical ESR <10 mΩ). Unlike older LDOs, it does not require added ESR for phase margin; low-ESR caps improve transient response and reduce output ripple.
MC33275DT-2.5 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):
- 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:
- DPAK
MC33275DT-2.5 FAQ
1.How can I place an order for MC33275DT-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33275DT-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 MC33275DT-2.5 reliable?
The price and inventory of MC33275DT-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 MC33275DT-2.5 is usually 5 days.
3.What payment methods are accepted for MC33275DT-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33275DT-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33275DT-2.5?
MC33275DT-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33275DT-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 MC33275DT-2.5?
For technical support, including MC33275DT-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33275DT-2.5 requirements.
6.How does Aetrix verify that MC33275DT-2.5 is sourced from the original manufacturer or authorized distributors?
All MC33275DT-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 MC33275DT-2.5 meets industry standards.
7.What is the process for return or replacement of MC33275DT-2.5?
All MC33275DT-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with MC33275DT-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 MC33275DT-2.5 part is unused and in its original packaging.
Return procedure for MC33275DT-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MC33275DT-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…
