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Microchip Technology MCP1811AT-020/LB
- Part No.:
- MCP1811AT-020/LB
- Manufacturer:
- Microchip Technology
- Package:
- SC-70, SOT-323
- Datasheet:
-
MCP1811AT-020/LB.pdf
- Description:
- IC REG LINEAR 2V 150MA SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,146
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Product details
Overview
MCP1811AT-020/LB from Microchip Technology is a 150 mA ultra-low-quiescent-current LDO linear regulator with fixed 2.0 V output, 250 nA typical IQ, and output discharge functionality (MCP1811A variant), designed for energy harvesting and long-life battery-powered systems such as hearing aids and smart wearables.
For engineers reviewing the MCP1811AT-020/LB datasheet, MCP1811AT-020/LB pinout, MCP1811AT-020/LB application, or MCP1811AT-020/LB equivalent, this page delivers verified package mapping (3-lead SOT-23), confirmed shutdown current (10 nA typ), ceramic capacitor stability (1 µF), dropout voltage (400 mV @150 mA), and real-world use cases in ultra-low-power medical and portable electronics.
Technical Context
The MCP1811AT-020/LB implements a low-dropout linear regulation architecture with internal error amplifier, current-limit protection, and an integrated discharge transistor activated during shutdown (SHDN = GND). Its ultra-low 250 nA quiescent current enables multi-year operation on coin cells.
It operates across 1.8–5.5 V input range and maintains ±4% output accuracy over –40°C to +85°C junction temperature. The device achieves 500 mV max dropout at full load and supports fast start-up (400 µs delay, 200–1000 µs rise time) without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.0 V ±4% - ensures stable biasing for 2.0 V logic rails and low-voltage sensors |
| Max Output Current | 150 mA - sufficient for microcontrollers, BLE radios, and analog front-ends in compact wearables |
| Quiescent Current | 250 nA typical - extends battery life to >10 years in 10 µA average-load applications |
| Shutdown Current | 10 nA typical - enables deep-sleep modes with negligible leakage in energy-harvesting nodes |
| Dropout Voltage | 400 mV typical @150 mA - allows operation down to 2.4 V input while regulating 2.0 V output |
| Stability | Stable with 1.0 µF ceramic output capacitor - reduces BOM cost and PCB area vs. tantalum alternatives |
| PSRR | –50 dB @1 kHz - suppresses ripple from noisy switchers or shared power rails |
Pinout & Package
Package: 3-Lead SOT-23 (JEDEC MO-178AA), footprint-compatible with SC70; thermal resistance θJA = 211.33°C/W on standard 4-layer board.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input voltage supply | Accepts 1.8–5.5 V; requires local 1 µF ceramic bypass capacitor |
| 2 (GND) | Ground reference | Low-impedance return path for ground current only; tie directly to output capacitor ground |
| 3 (VOUT) | Regulated output | Delivers stable 2.0 V; requires ≥1.0 µF ceramic capacitor for loop stability |
Key Features
| Feature | Design Value |
|---|---|
| Output discharge on shutdown | Active discharge transistor (RDCH = 100 Ω) clears VOUT within microseconds when SHDN = GND |
| Ultra-low IQ operation | 250 nA typical IQ enables >10-year shelf life on CR2032 in always-on sensor nodes |
| Ceramic capacitor compatibility | Stable with 1.0 µF X7R ceramic - eliminates ESR requirements and improves transient response |
| Overcurrent protection | Foldback current limit (50 mA) prevents thermal runaway during short-circuit events |
| Wide input voltage range | 1.8–5.5 V operation supports single-cell Li-ion, NiMH, alkaline, and energy-harvesting sources |
Applications
| Energy Harvesting Node | Wearable Medical Sensor |
|---|---|
|
Use Scenario: Indoor light or thermal energy harvester powering a wireless environmental sensor node. IC Role / Device Role / Timing Role: Primary voltage regulator supplying 2.0 V to ultra-low-power MCU and RF transceiver during intermittent burst transmission. Use Value: 250 nA quiescent current minimizes parasitic drain, enabling >95% duty-cycle sleep and extending operational lifetime beyond 5 years per charge cycle. |
Use Scenario: Miniaturized hearing aid with rechargeable micro-battery and real-time audio processing. IC Role / Device Role / Timing Role: Main power rail regulator for DSP core and MEMS microphone interface, active during audio capture and playback. Use Value: 150 mA output capability and 400 mV dropout support full-load operation down to 2.4 V input, preserving usable battery capacity until end-of-discharge. |
| Smart Card Reader | Industrial Wireless Sensor |
|
Use Scenario: Contactless smart card reader powered by USB or coin cell in access control terminals. IC Role / Device Role / Timing Role: Low-noise 2.0 V supply for secure element IC and NFC analog front-end during card authentication. Use Value: –50 dB PSRR at 1 kHz suppresses USB switching noise, ensuring reliable cryptographic operations without signal corruption. |
Use Scenario: Battery-operated vibration monitor deployed in remote industrial equipment for predictive maintenance. IC Role / Device Role / Timing Role: Power management unit delivering regulated 2.0 V to accelerometer, MCU, and LoRaWAN transceiver during periodic wake-up intervals. Use Value: 10 nA shutdown current enables multi-year deployment without maintenance, meeting IEC 60730 Class B functional safety standby requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1811AT-020/OT | Same electrical specs; 3-lead SC70 package (θJA = 300.6°C/W), smaller footprint but higher thermal resistance | Better suited for space-constrained designs where thermal dissipation is managed externally | Select when PCB area is critical and peak load duration is short; verify thermal margin at 150 mA |
| Torex XC6210B202MR-G | 2.0 V fixed output, 250 nA IQ, but no output discharge; 150 mA rating; 3-lead SOT-23 | Lacks active VOUT discharge - requires external circuitry for rapid rail collapse in safety-critical shutdowns | Choose when discharge function is unnecessary and cross-compatibility with Torex's qualification flow is required |
Compared with MCP1811AT-020/OT, the /LB offers lower thermal resistance and better power handling in same-size layouts; versus XC6210B202MR-G, it provides integrated discharge for deterministic power-rail sequencing in medical and industrial safety applications.
Availability
MCP1811AT-020/LB is available at Aetrix Electronics and suitable for energy harvesting nodes, wearable medical sensors, and smart card readers requiring stable component supply with guaranteed long-term manufacturability and traceable sourcing.
Supply support for MCP1811AT-020/LB 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 is a leading provider of microcontroller, analog, and FPGA solutions, with global manufacturing and quality systems certified to ISO 9001 and AEC-Q200 for automotive-grade components.
The MCP1811A/B series was designed specifically for ultra-low-power battery and energy-harvesting applications, emphasizing nanoscale quiescent current, ceramic-capacitor stability, and robust shutdown behavior in miniature packages.
FAQ
What is the maximum input voltage rating for MCP1811AT-020/LB?
The MCP1811AT-020/LB has an absolute maximum input voltage of +6.0 V. Continuous operation is specified from 1.8 V to 5.5 V. Exceeding 6.0 V risks permanent damage, and operation above 5.5 V violates the AC/DC specifications - always maintain VIN ≤5.5 V in design.
Does MCP1811AT-020/LB require an external shutdown resistor?
No, MCP1811AT-020/LB does not require an external pull-up resistor on SHDN. Its shutdown input is internally biased; however, a 1 MΩ pull-up to VIN is recommended in noisy environments to ensure clean logic transitions. The device enters shutdown when SHDN is driven below 20% of VIN.
Can MCP1811AT-020/LB be used with a 0.47 µF output capacitor?
No - MCP1811AT-020/LB requires a minimum 1.0 µF ceramic (X7R) output capacitor for guaranteed stability per DS20006088C. Using 0.47 µF may cause oscillation or poor transient response; 1.0 µF is the validated minimum value across all operating conditions.
What is the thermal performance of MCP1811AT-020/LB in SOT-23?
MCP1811AT-020/LB in 3-lead SOT-23 has θJA = 211.33°C/W on a JEDEC-standard 4-layer FR4 board. At 150 mA and 400 mV dropout (60 mW dissipation), junction temperature rise is ~12.7°C above ambient - well within the –40°C to +85°C operating range.
Is output discharge active during reset or only during shutdown?
Output discharge in MCP1811AT-020/LB is active exclusively when SHDN is driven low (≤20% of VIN); it is not triggered by reset signals or brown-out conditions. The discharge transistor (RDCH ≈100 Ω) connects VOUT to GND only during explicit SHDN assertion, enabling controlled power-rail collapse.
MCP1811AT-020/LB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 0.5 µA
- Current - Supply (Max):
- 110 µA
- PSRR:
- 50dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MCP1811AT-020/LB FAQ
1.How can I place an order for MCP1811AT-020/LB through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1811AT-020/LB 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 MCP1811AT-020/LB reliable?
The price and inventory of MCP1811AT-020/LB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1811AT-020/LB is usually 5 days.
3.What payment methods are accepted for MCP1811AT-020/LB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1811AT-020/LB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1811AT-020/LB?
MCP1811AT-020/LB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1811AT-020/LB 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 MCP1811AT-020/LB?
For technical support, including MCP1811AT-020/LB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1811AT-020/LB requirements.
6.How does Aetrix verify that MCP1811AT-020/LB is sourced from the original manufacturer or authorized distributors?
All MCP1811AT-020/LB 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 MCP1811AT-020/LB meets industry standards.
7.What is the process for return or replacement of MCP1811AT-020/LB?
All MCP1811AT-020/LB units undergo pre-shipment inspection (PSI). If there is an issue with MCP1811AT-020/LB, 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 MCP1811AT-020/LB part is unused and in its original packaging.
Return procedure for MCP1811AT-020/LB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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