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Microchip Technology MCP1703T-2502E/MC
- Part No.:
- MCP1703T-2502E/MC
- Manufacturer:
- Microchip Technology
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
MCP1703T-2502E/MC.pdf
- Description:
- IC REG LINEAR 2.5V 250MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,230
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Product details
Overview
MCP1703T-2502E/MC from Microchip Technology is a 2.5V fixed-output, 250 mA CMOS low-dropout (LDO) linear voltage regulator in SOT-23A package, delivering ±0.4% output voltage tolerance at +25°C, 625 mV typical dropout at 250 mA (VOUT = 2.8V), and only 2.0 µA typical quiescent current - optimized for microcontroller power in battery-powered smoke detectors and CO2 sensors.
For engineers reviewing the MCP1703T-2502E/MC datasheet, MCP1703T-2502E/MC pinout, MCP1703T-2502E/MC application, or MCP1703T-2502E/MC equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options, and supply-chain support for industrial and portable electronics design.
Technical Context
The MCP1703T-2502E/MC uses a P-channel PMOS pass transistor architecture with internal bandgap reference and error amplifier feedback loop to maintain regulation across input voltages from 2.7V to 16.0V. Its low 2.0 µA quiescent current enables multi-year operation in ultra-low-power sensor nodes.
It integrates overcurrent limiting that cycles into hiccup mode during short-circuit events and thermal shutdown triggered at +150°C junction temperature, with automatic recovery at +130°C. Output stability is guaranteed with 1.0–22 µF ceramic capacitors, supporting compact, high-reliability layouts without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±0.4% at +25°C; ±3% over –40°C to +125°C - ensures stable ADC reference and MCU core voltage under thermal stress. |
| Max Output Current | 250 mA for VOUT ≥ 2.5V - sufficient to power 32-bit microcontrollers (e.g., PIC32MM) with peripherals active. |
| Dropout Voltage | 625 mV typical @ 250 mA (VOUT = 2.8V); ≤975 mV max @ 250 mA (VOUT = 2.5V) - enables operation down to 3.45V input from two alkaline cells. |
| Quiescent Current | 2.0 µA typical, ≤5 µA max - extends battery life in always-on smoke detectors beyond 10 years on CR2032. |
| Input Voltage Range | 2.7V to 16.0V - supports 2–6 alkaline cells, 1–2 Li-ion cells, or 9V alkaline batteries without external pre-regulation. |
| PSRR | 44 dB @ 100 Hz - suppresses ripple from switching converters or noisy battery sources feeding sensitive analog circuitry. |
| Thermal Shutdown | Activates at +150°C junction temperature with hysteresis; recovers at +130°C - prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
SOT-23A 3-pin surface-mount package (3.0 mm × 1.4 mm × 1.1 mm), thermally enhanced with exposed pad connected internally to GND - requires soldering the tab to a copper pour for optimal thermal performance (θJA = 336°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 3) | Unregulated input supply | Connects to source of P-MOS pass transistor; must be decoupled with ≥1 µF ceramic capacitor near pin to ensure stability and low-impedance path. |
| GND (Pin 1) | Regulator ground reference | Reference node for output regulation; carries only 2.0 µA bias current - minimize trace impedance to load return path to avoid regulation error. |
| VOUT (Pin 2) | Regulated output voltage | Delivers up to 250 mA; connect output capacitor (1–22 µF ceramic) directly between this pin and GND for transient response and noise filtering. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 2.0 µA typical enables >10-year battery life in maintenance-free CO2 detectors using CR123A cells. |
| Stable with minimal capacitance | Guaranteed stability with 1.0 µF ceramic output capacitor - eliminates need for larger, higher-ESR tantalum parts and reduces BOM count. |
| Robust protection suite | Integrated short-circuit hiccup mode and thermal shutdown prevent field failures in sealed enclosures with limited airflow. |
| Precision output tolerance | ±0.4% initial accuracy at +25°C allows direct use as voltage reference for 10-bit ADCs without calibration in cost-sensitive designs. |
| Wide input range | 2.7–16.0V operation supports legacy 9V battery systems and modern multi-cell Li-ion packs without redesign. |
Applications
| Smoke Detector Power | CO₂ Sensor Bias Supply |
|---|---|
|
Use Scenario: Standalone photoelectric smoke alarm powered by two AA alkaline cells, operating continuously for 10+ years with periodic self-test pulses. IC Role / Device Role / Timing Role: Primary 2.5V LDO supplying MCU, optical chamber driver, and buzzer logic - maintains regulation as battery voltage drops from 3.2V to 2.7V. Use Value: 2.0 µA quiescent current and 625 mV dropout at 250 mA enable full functionality down to end-of-life battery voltage without brownout resets. |
Use Scenario: NDIR-based CO₂ sensor module in HVAC ducts, requiring stable 2.5V rail for infrared detector and signal chain across –25°C to +60°C ambient. IC Role / Device Role / Timing Role: Precision bias supply for photodiode transimpedance amplifier and 12-bit SAR ADC reference - referenced to same GND as analog front-end. Use Value: ±0.4% output tolerance and 50 ppm/°C tempco ensure <0.5% full-scale error drift over temperature, eliminating recalibration cycles. |
| Smart Battery Pack Monitor | Industrial Data Logger |
|
Use Scenario: Lithium-ion smart battery pack with fuel gauge IC and protection circuitry, powered from cell stack (3.0–4.2V per cell) and requiring low-IQ auxiliary rail. IC Role / Device Role / Timing Role: Auxiliary 2.5V supply for coulomb counter and SMBus interface - operates from single-cell (3.0–4.2V) or two-cell (6.0–8.4V) inputs. Use Value: 250 mA output capability supports simultaneous SMBus communication and EEPROM writes; 44 dB PSRR rejects switching noise from adjacent DC-DC converters. |
Use Scenario: Solar-powered environmental data logger deployed outdoors, sampling temperature/humidity every 5 minutes and transmitting via LoRaWAN once daily. IC Role / Device Role / Timing Role: Main system regulator powering 32-bit ARM Cortex-M0+ MCU, flash memory, and RF transceiver - activated only during wake-up intervals. Use Value: 2.0 µA IQ minimizes dark-current drain from supercapacitor backup; stable 1 µF ceramic output cap withstands wide temperature swings and vibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1702T-2502E/MB | SOT-23A package, identical 2.5V output and 250 mA rating, but 3.5 µA typical IQ (vs. 2.0 µA) and ±1.0% output tolerance (vs. ±0.4%). | Higher quiescent current reduces battery life in decade-long deployments; wider tolerance may require ADC calibration in precision sensing. | Select when cost sensitivity outweighs ultra-low-IQ or tight tolerance requirements. |
| Torex XC6206P252MR-G | SOT-23-3 package, 2.5V output, 250 mA, 1.0 µA IQ, but only 12V max input (vs. 16V) and no thermal shutdown - relies on external current limit. | Lacks integrated thermal protection; unsuitable for high-ambient industrial enclosures or high-power pulsed loads without derating. | Choose only for space-constrained, low-temperature consumer devices where 12V input ceiling is acceptable. |
Compared with MCP1702T-2502E/MB, the MCP1703T-2502E/MC delivers tighter output accuracy and lower quiescent current critical for long-life battery systems; versus XC6206P252MR-G, it adds robust thermal and short-circuit protection essential for unattended industrial deployments - making it the preferred choice for safety-critical and thermally demanding applications.
Availability
MCP1703T-2502E/MC is available at Aetrix Electronics and suitable for battery-powered smoke detectors, CO2 sensors, and industrial data loggers requiring stable component supply with long-term lifecycle assurance.
Supply support for MCP1703T-2502E/MC 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
Microchip Technology Inc. is a leading provider of microcontrollers, analog components, and Flash-IP solutions, serving automotive, industrial, and consumer markets with vertically integrated silicon and software tools.
The MCP1703 product line delivers micropower LDO regulators designed specifically for ultra-low-power, battery-operated applications where longevity, precision, and reliability are non-negotiable - such as life-safety sensors and remote monitoring systems.
FAQ
What is the maximum input voltage for the MCP1703T-2502E/MC?
The MCP1703T-2502E/MC supports an absolute maximum input voltage of +18V, but its specified operating input range is 2.7V to 16.0V. Exceeding 16.0V risks violating the device's safe operating area, especially under load, and may trigger overvoltage stress not covered by warranty. Always maintain VIN ≤ 16.0V in normal operation.
Does the MCP1703T-2502E/MC require an external capacitor for stability?
Yes - the MCP1703T-2502E/MC requires a minimum 1.0 µF ceramic output capacitor (X7R or better) placed directly between VOUT and GND for small-signal stability. Input capacitance of ≥1.0 µF is also recommended. Larger values up to 22 µF are supported, but stability must be verified with load-step testing if exceeding 22 µF.
Can the MCP1703T-2502E/MC be used as a precision voltage reference?
Yes - the MCP1703T-2502E/MC is routinely used as a low-quiescent-current voltage reference due to its ±0.4% initial tolerance at +25°C, 50 ppm/°C temperature coefficient, and 8 µV/√Hz output noise. When calibrated at production test, it achieves sub-0.5% total error over –40°C to +125°C - ideal for ratio-metric ADC applications.
What thermal considerations apply to the MCP1703T-2502E/MC in SOT-23A package?
The SOT-23A package has θJA = 336°C/W. At 250 mA and 3.45V input (0.95V dropout), power dissipation is ~239 mW - resulting in ~80°C junction rise above ambient. To stay within the +125°C continuous rating, ambient must remain ≤45°C unless the exposed pad is soldered to ≥1 cm² copper pour. Thermal shutdown activates at +150°C.
Is the MCP1703T-2502E/MC pin-compatible with other regulators in the MCP170x family?
Yes - the MCP1703T-2502E/MC shares identical SOT-23A pinout (VIN=Pin3, GND=Pin1, VOUT=Pin2) with all MCP1700/1702/1703 variants. However, output voltage, quiescent current, and tolerance differ across models; substituting without verifying electrical compatibility may cause regulation failure or excessive power loss.
MCP1703T-2502E/MC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.1V @ 250mA
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- 5 µA
- Current - Supply (Max):
- -
- PSRR:
- 44dB (100Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x3)
MCP1703T-2502E/MC FAQ
1.How can I place an order for MCP1703T-2502E/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1703T-2502E/MC 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 MCP1703T-2502E/MC reliable?
The price and inventory of MCP1703T-2502E/MC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1703T-2502E/MC is usually 5 days.
3.What payment methods are accepted for MCP1703T-2502E/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1703T-2502E/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1703T-2502E/MC?
MCP1703T-2502E/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1703T-2502E/MC 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 MCP1703T-2502E/MC?
For technical support, including MCP1703T-2502E/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1703T-2502E/MC requirements.
6.How does Aetrix verify that MCP1703T-2502E/MC is sourced from the original manufacturer or authorized distributors?
All MCP1703T-2502E/MC 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 MCP1703T-2502E/MC meets industry standards.
7.What is the process for return or replacement of MCP1703T-2502E/MC?
All MCP1703T-2502E/MC units undergo pre-shipment inspection (PSI). If there is an issue with MCP1703T-2502E/MC, 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 MCP1703T-2502E/MC part is unused and in its original packaging.
Return procedure for MCP1703T-2502E/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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