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Microchip Technology MCP1703T-1202E/MC
- Part No.:
- MCP1703T-1202E/MC
- Manufacturer:
- Microchip Technology
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
MCP1703T-1202E/MC.pdf
- Description:
- IC REG LINEAR 1.2V 200MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,059
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Product details
Overview
MCP1703T-1202E/MC from Microchip Technology is a CMOS low-dropout (LDO) voltage regulator delivering 250 mA output current at 1.2 V with 2.0 µA typical quiescent current, 625 mV typical dropout voltage @ 250 mA (VOUT = 2.8 V), ±0.4% output voltage tolerance at +25°C, and stable operation with 1.0–22 µF ceramic output capacitance. It serves as a primary power supply for ultra-low-power microcontrollers in battery-powered smoke detectors.
For engineers reviewing the MCP1703T-1202E/MC datasheet, MCP1703T-1202E/MC pinout, MCP1703T-1202E/MC application, or MCP1703T-1202E/MC equivalent, key selection criteria include its 1.2 V fixed output, SOT-23A package thermal resistance (θJA = 336°C/W), -40°C to +125°C operating junction temperature range, and compatibility with single-cell Li-ion or two-cell alkaline inputs.
Technical Context
The MCP1703T-1202E/MC employs a P-channel PMOS pass transistor architecture with internal bandgap reference and error amplifier feedback loop, enabling precise regulation under varying load and line conditions. Its overcurrent protection operates via cycle-by-cycle shutdown and restart, while overtemperature protection triggers at 150°C junction temperature with 130°C hysteresis.
Designed for micropower operation, it maintains stability with minimal 1 µF ceramic output capacitance and supports input voltages from 2.7 V to 16.0 V - sufficient for two-to-six alkaline cells or one-to-two Li-ion cells. Output voltage accuracy is maintained across -40°C to +125°C with ±3% max tolerance and 50 ppm/°C temperature coefficient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V - enables direct powering of low-voltage logic cores and sensor interfaces without external resistive feedback. |
| Max Output Current | 250 mA @ VOUT ≥ 2.5 V; 200 mA @ VOUT < 2.5 V - supports moderate digital loads while preserving low-quiescent operation. |
| Quiescent Current | 2.0 µA typical - extends battery life in always-on applications such as CO2 detectors and smart battery packs. |
| Dropout Voltage | 625 mV typical @ 250 mA (VOUT = 2.8 V) - allows operation down to ~1.82 V input for 1.2 V output, critical for end-of-life battery use. |
| Output Tolerance | ±0.4% typical at +25°C, ±3% max over -40°C to +125°C - ensures reliable ADC reference and I/O voltage compliance in industrial environments. |
| Stability Range | Stable with 1.0–22 µF ceramic output capacitance - eliminates need for tantalum or electrolytic capacitors, reducing BOM cost and board space. |
| Thermal Shutdown | 150°C trip, 130°C recovery - provides robust fault protection without external circuitry in compact SOT-23A layouts. |
Pinout & Package
Package: SOT-23A (3-pin, surface-mount). Thermal resistance θJA = 336°C/W on FR-4 4-layer board per JESD51-7. Exposed pad not present in SOT-23A variant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Unregulated input supply - must be decoupled with ≥1 µF ceramic capacitor close to pin; supports 2.7–16.0 V range. |
| 2 | GND | Regulator ground reference - carries only 2.0 µA bias current; must connect directly to low-impedance ground plane near load return path. |
| 3 | VOUT | Regulated 1.2 V output - supplies load current up to 200 mA; requires ≥1 µF ceramic capacitor placed adjacent to pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 2.0 µA typical - enables >10-year battery life in coin-cell–powered data loggers with periodic wake-up cycles. |
| Low dropout performance | 625 mV @ 250 mA (VOUT = 2.8 V) - sustains regulation through deep battery discharge in 2-cell alkaline systems. |
| High output accuracy | ±0.4% typical tolerance at +25°C - reduces calibration overhead in precision analog front-ends and sensor signal chains. |
| Robust protection suite | Integrated short-circuit and overtemperature shutdown - eliminates need for external current-limiting or thermal sensors in space-constrained designs. |
| Ceramic capacitor compatibility | Stable with 1–22 µF X7R ceramic output caps - avoids ESR sensitivity issues and simplifies layout versus tantalum-based LDOs. |
Applications
| Smoke Detector Power Supply | Battery-Powered Data Logger |
|---|---|
|
Use Scenario: Standby and alarm-mode operation in residential smoke detectors powered by 9 V alkaline batteries. IC Role / Device Role / Timing Role: Primary 1.2 V power rail for MCU, sensor interface, and audible alarm driver. Use Value: 2.0 µA quiescent current extends battery life beyond 10 years in standby; 200 mA peak capability drives piezo alarm without brownout. |
Use Scenario: Intermittent environmental monitoring using microcontroller, temperature/humidity sensor, and flash memory. IC Role / Device Role / Timing Role: Main system regulator during active measurement and logging phases. Use Value: 1.2 V output matches low-voltage MCU core requirements; 625 mV dropout enables full utilization of 2-cell Li-ion (3.0–4.2 V) capacity. |
| CO₂ Detector Reference | Smart Battery Pack Monitor |
|
Use Scenario: Precision gas sensing in portable CO₂ monitors using NDIR optical detection with analog front-end. IC Role / Device Role / Timing Role: Low-noise 1.2 V reference for ADC and op-amp biasing in ratiometric measurement circuits. Use Value: ±0.4% output tolerance and 50 ppm/°C tempco minimize gain drift; 8 µV/√Hz noise preserves SNR in low-level sensor signals. |
Use Scenario: Embedded fuel gauge and protection circuitry inside rechargeable Li-ion battery packs. IC Role / Device Role / Timing Role: Power source for coulomb counter IC and safety controller during pack sleep mode. Use Value: 2.0 µA IQ prevents parasitic drain that would reduce shelf life; 2.7–16.0 V input range accommodates pack voltage from 2.5 V (deep discharge) to 12.6 V (4S). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1702T-1202E/MB | SOT-23A package, same 1.2 V output, but 150 mA max output current and higher 4 µA quiescent current. | Lower current capability limits use in pulsed-load applications like alarm drivers; suitable only for sub-100 mA MCU-only systems. | Select when lower cost is prioritized over headroom and ultra-low IQ; verify thermal margin at 150 mA in SOT-23A. |
| Torex XC6206P122MR-G | 1.2 V fixed output, SOT-23-3, 250 mA rating, but 1.0 µA quiescent current and 350 mV dropout @ 100 mA - no overtemperature protection. | Lacks thermal shutdown; requires external thermal design oversight; better for ultra-long-life applications where fault coverage is handled elsewhere. | Choose for lowest possible IQ in non-safety-critical, thermally managed designs; avoid in sealed enclosures or high ambient temps. |
Compared with MCP1702T-1202E/MB, the MCP1703T-1202E/MC delivers 67% higher output current and half the quiescent current, enabling more complex peripherals; versus XC6206P122MR-G, it trades 1 µA lower IQ for integrated thermal and short-circuit protection - critical for unattended battery systems.
Availability
MCP1703T-1202E/MC is available at Aetrix Electronics and suitable for battery-powered smoke detectors, CO₂ sensors, and smart battery pack monitors requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MCP1703T-1202E/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, consumer, and communications markets with vertically integrated silicon and software offerings.
The MCP1703 family was designed specifically for micropower, wide-input-voltage LDO regulation in battery-critical applications - emphasizing ultra-low quiescent current, robust protection, and ceramic-capacitor stability without sacrificing output accuracy.
FAQ
What is the maximum input voltage rating for the MCP1703T-1202E/MC?
The MCP1703T-1202E/MC has an absolute maximum input voltage rating of +18 V, but its specified operating input range is 2.7 V to 16.0 V. Operation above 16.0 V risks exceeding safe power dissipation limits and may trigger overvoltage stress not covered by warranty. Always maintain VIN ≤ 16.0 V in normal operation.
Does the MCP1703T-1202E/MC require an input capacitor?
Yes, the MCP1703T-1202E/MC requires a minimum 1 µF ceramic input capacitor placed close to the VIN and GND pins to ensure stability and low source impedance. The datasheet confirms stable operation with this value for loads up to 100 mA; larger values improve PSRR and transient response but are not mandatory for basic functionality.
Can the MCP1703T-1202E/MC be used as a precision voltage reference?
Yes, the MCP1703T-1202E/MC is explicitly qualified for voltage reference use due to its ±0.4% output tolerance at +25°C, 50 ppm/°C temperature coefficient, and low 8 µV/√Hz noise. When calibrated in production, its thermal and line regulation errors become the dominant inaccuracies - making it suitable for ratiometric ADC references in sensor systems.
What is the thermal shutdown behavior of the MCP1703T-1202E/MC?
The MCP1703T-1202E/MC shuts down at +150°C junction temperature and resumes operation once the die cools to approximately +130°C. This hysteresis prevents thermal oscillation. During shutdown, VOUT drops to near 0 V, and the device draws only leakage current - providing fail-safe protection without external intervention.
Is the MCP1703T-1202E/MC compatible with 1 µF ceramic output capacitors?
Yes, the MCP1703T-1202E/MC is fully stable with 1.0 µF ceramic (X7R) output capacitance, as validated in DS22049F. This minimum value satisfies small-signal stability requirements for loads up to 250 mA. Larger ceramic values (up to 22 µF) are also supported and improve transient response without compromising stability.
MCP1703T-1202E/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):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 200mA
- 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-1202E/MC FAQ
1.How can I place an order for MCP1703T-1202E/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1703T-1202E/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-1202E/MC reliable?
The price and inventory of MCP1703T-1202E/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-1202E/MC is usually 5 days.
3.What payment methods are accepted for MCP1703T-1202E/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1703T-1202E/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1703T-1202E/MC?
MCP1703T-1202E/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1703T-1202E/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-1202E/MC?
For technical support, including MCP1703T-1202E/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1703T-1202E/MC requirements.
6.How does Aetrix verify that MCP1703T-1202E/MC is sourced from the original manufacturer or authorized distributors?
All MCP1703T-1202E/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-1202E/MC meets industry standards.
7.What is the process for return or replacement of MCP1703T-1202E/MC?
All MCP1703T-1202E/MC units undergo pre-shipment inspection (PSI). If there is an issue with MCP1703T-1202E/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-1202E/MC part is unused and in its original packaging.
Return procedure for MCP1703T-1202E/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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