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Microchip Technology MCP1703AT-2802E/MB
- Part No.:
- MCP1703AT-2802E/MB
- Manufacturer:
- Microchip Technology
- Package:
- TO-243AA
- Datasheet:
-
MCP1703AT-2802E/MB.pdf
- Description:
- IC REG LINEAR 2.8V 250MA SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,036
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Product details
Overview
MCP1703AT-2802E/MB from Microchip Technology is a 2.8V fixed-output, 250 mA low-dropout (LDO) linear voltage regulator in SOT-23A package, featuring 2.0 µA typical quiescent current, 625 mV typical dropout at 250 mA, ±0.4% output voltage tolerance at +25°C, and operation across 2.7V–16.0V input range. It delivers stable power to microcontrollers and sensors in battery-powered smoke detectors and CO₂ monitors.
For engineers reviewing the MCP1703AT-2802E/MB datasheet, MCP1703AT-2802E/MB pinout, MCP1703AT-2802E/MB application, or MCP1703AT-2802E/MB equivalent, key selection criteria include ultra-low IQ, thermal shutdown behavior, dropout performance at 2.8V output, ceramic capacitor stability (1–22 µF), and SOT-23A thermal resistance (θJA = 336°C/W).
Technical Context
The MCP1703AT-2802E/MB uses a P-channel PMOS pass transistor architecture enabling low dropout and minimal ground current during regulation. Its internal error amplifier compares a fraction of VOUT against a precision bandgap reference to maintain output accuracy across load and line variations.
Protection circuitry includes foldback current limiting that cycles on/off under short-circuit conditions and thermal shutdown triggered at +150°C junction temperature with automatic recovery at +130°C. The device achieves stable regulation with only 1 µF ceramic output capacitance and supports input sources from two alkaline cells up to 9V batteries.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±0.4% (typical at +25°C); ensures precise biasing for 2.8V-tolerant MCUs and analog sensors |
| Max Output Current | 250 mA (for VOUT ≥ 2.5V); sufficient to power Cortex-M0+ MCUs with peripherals active |
| Dropout Voltage | 625 mV (typical @ 250 mA, VOUT = 2.8V); enables operation down to 3.425V input-critical for single Li-ion or 3-cell alkaline systems |
| Quiescent Current | 2.0 µA (typical); extends battery life in always-on smoke detectors beyond 10 years on CR2032 |
| Input Voltage Range | 2.7V to 16.0V; compatible with 2–6 alkaline cells, 9V batteries, and 1–2 Li-ion cells without external supervision |
| Thermal Shutdown | Triggers at +150°C junction temperature; protects against sustained overloads in enclosed industrial enclosures |
| Output Capacitor Range | Stable with 1.0 µF to 22 µF X7R ceramic; eliminates need for tantalum or electrolytic capacitors in space-constrained designs |
Pinout & Package
Package: SOT-23A (3-pin, surface-mount, no exposed pad). Pin assignments are validated per Microchip DS20005122B, Table 3-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 3) | Unregulated input supply | Connects to source of P-MOS pass transistor; requires ≤10Ω source impedance and ≥1 µF ceramic decoupling for stability |
| GND (Pin 1) | Regulator ground reference | Low-current return path (2.0 µA typical); must tie directly to PCB ground plane near output capacitor negative terminal |
| VOUT (Pin 2) | Regulated output voltage | Delivers 2.8V to load; trace routing must minimize inductance-place output capacitor within 2 mm of this pin |
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 |
| Fast startup time | 600 µs output rise time prevents MCU brown-out during wake-up from deep sleep modes |
| Robust protection suite | Integrated short-circuit foldback and thermal shutdown eliminate need for external current-sense or thermal monitoring circuits |
| Wide input compatibility | 2.7V–16.0V input range supports direct connection to 9V alkaline, 2S Li-ion (8.4V max), and multi-cell primary battery stacks |
| Ceramic capacitor stability | Stable with 1–22 µF X7R ceramics-reduces BOM cost and board area versus tantalum alternatives |
Applications
| Smoke Detector Power Supply | CO₂ Sensor Biasing |
|---|---|
Use Scenario: Standalone photoelectric smoke alarm powered by two AA alkaline cells with 10-year shelf life requirement. IC Role / Device Role / Timing Role: Primary 2.8V LDO supplying MCU, optical chamber driver, and buzzer logic. Use Value: 2.0 µA IQ and 625 mV dropout extend operational life to >10 years; ±0.4% VOUT tolerance ensures consistent optical sensor calibration. | Use Scenario: Portable NDIR-based CO₂ monitor using electrochemical sensor requiring stable 2.8V reference and analog front-end bias. IC Role / Device Role / Timing Role: Precision low-noise voltage source for ADC reference and op-amp rails. Use Value: 1 µV/√Hz noise at 1 kHz and ±0.4% output accuracy maintain <0.5% CO₂ measurement drift over temperature. |
| Smart Battery Pack Monitor | Industrial Wireless Sensor Node |
Use Scenario: Lithium-ion smart battery pack with fuel gauge IC and protection circuitry operating from 3.0–4.2V cell stack. IC Role / Device Role / Timing Role: Secondary regulated rail for fuel gauge MCU and SMBus interface logic. Use Value: 2.7V minimum input allows regulation down to 3.325V pack voltage-maximizing usable capacity before cutoff. | Use Scenario: LoRaWAN node with ARM Cortex-M0+ MCU, RF transceiver, and environmental sensors deployed in unventilated factory ceilings. IC Role / Device Role / Timing Role: Main 2.8V supply for MCU core, radio, and digital sensors under intermittent 3.6V Li-SOCl₂ input. Use Value: Thermal shutdown at +150°C prevents latch-up in high-ambient (>85°C) environments; SOT-23A footprint minimizes thermal mass. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1702T-2802E/MB | Same 2.8V output, but 150 mA max output current and higher 4 µA quiescent current | Suitable only for sub-150 mA loads like basic MCU-only nodes; insufficient for RF transceivers or sensor arrays | Select when load current never exceeds 150 mA and lowest possible cost is prioritized over battery life |
| Torex XC6206P282MR-G | 2.8V output, 250 mA rating, but 1.0 µA IQ and 350 mV dropout @ 100 mA; no thermal shutdown | Lacks overtemperature protection-requires external thermal management in sealed enclosures | Choose for ultra-low-power applications where thermal risk is mitigated by mechanical design or ambient control |
Compared with MCP1702T-2802E/MB, the MCP1703AT-2802E/MB delivers 67% higher output current and half the quiescent current-enabling RF-capable sensor nodes. Versus XC6206P282MR-G, it trades 1 µA lower IQ for integrated thermal safety critical in industrial deployments.
Availability
MCP1703AT-2802E/MB is available at Aetrix Electronics and suitable for battery-powered alarm circuits, smoke detectors, and CO₂ detectors requiring stable component supply with long-term lifecycle assurance.
Supply support for MCP1703AT-2802E/MB 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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and power management ICs for industrial, automotive, and consumer markets.
The MCP1703A product line delivers micropower LDO regulators optimized for battery longevity and wide-input-voltage operation in safety-critical sensing and alarm applications.
FAQ
What is the maximum continuous output current for MCP1703AT-2802E/MB at 2.8V output?
The MCP1703AT-2802E/MB delivers up to 250 mA continuously when regulating to 2.8V, as confirmed in DS20005122B Section 1.0 Electrical Characteristics. This rating applies across the full -40°C to +125°C junction temperature range with proper thermal management using the SOT-23A package.
Does MCP1703AT-2802E/MB require an external capacitor for stability?
Yes, MCP1703AT-2802E/MB requires a minimum 1.0 µF ceramic output capacitor (X7R dielectric) placed adjacent to the VOUT pin for small-signal stability. Input capacitance of ≥1.0 µF is also recommended. The device is unstable without these capacitors, per Section 5.2 of DS20005122B.
What protection features are integrated into MCP1703AT-2802E/MB?
MCP1703AT-2802E/MB integrates short-circuit foldback current limiting and thermal shutdown at +150°C with automatic recovery at +130°C. These protections are fully internal-no external components are needed to implement safe operation under fault conditions.
Can MCP1703AT-2802E/MB operate from a single Li-ion cell?
No-MCP1703AT-2802E/MB requires a minimum 2.7V input, while a single Li-ion cell discharges down to 2.5V. It is suitable for two Li-ion cells (4.2V–3.0V) or one Li-ion plus boost stage, but not direct single-cell operation without undervoltage lockout risk.
What is the output voltage tolerance specification for MCP1703AT-2802E/MB over temperature?
The MCP1703AT-2802E/MB has ±0.4% typical output voltage tolerance at +25°C and ±3% maximum over the full -40°C to +125°C operating junction temperature range, as specified in DS20005122B Table 1-1. This ensures reliable MCU operation even in automotive under-hood environments.
MCP1703AT-2802E/MB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-243AA
- 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):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.975V @ 250mA
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- 5 µA
- Current - Supply (Max):
- -
- PSRR:
- 35dB (100Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-3
MCP1703AT-2802E/MB FAQ
1.How can I place an order for MCP1703AT-2802E/MB through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1703AT-2802E/MB 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 MCP1703AT-2802E/MB reliable?
The price and inventory of MCP1703AT-2802E/MB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1703AT-2802E/MB is usually 5 days.
3.What payment methods are accepted for MCP1703AT-2802E/MB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1703AT-2802E/MB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1703AT-2802E/MB?
MCP1703AT-2802E/MB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1703AT-2802E/MB 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 MCP1703AT-2802E/MB?
For technical support, including MCP1703AT-2802E/MB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1703AT-2802E/MB requirements.
6.How does Aetrix verify that MCP1703AT-2802E/MB is sourced from the original manufacturer or authorized distributors?
All MCP1703AT-2802E/MB 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 MCP1703AT-2802E/MB meets industry standards.
7.What is the process for return or replacement of MCP1703AT-2802E/MB?
All MCP1703AT-2802E/MB units undergo pre-shipment inspection (PSI). If there is an issue with MCP1703AT-2802E/MB, 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 MCP1703AT-2802E/MB part is unused and in its original packaging.
Return procedure for MCP1703AT-2802E/MB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP1703AT-2802E/MB Tags
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MIC5504-1.8YM5-TR
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MIC5365-3.0YC5-TR
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