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Microchip Technology MCP1811AT-020/OT
- Part No.:
- MCP1811AT-020/OT
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MCP1811AT-020/OT.pdf
- Description:
- IC REG LINEAR 2V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,269
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Product details
Overview
MCP1811AT-020/OT from Microchip Technology is an ultra-low quiescent current (250 nA typical) 150 mA low-dropout linear regulator with fixed 2.0 V output, designed for energy harvesting and long-life battery-powered systems. It operates from 1.8 V to 5.5 V input, features output discharge during shutdown, and stabilizes with only 1.0 µF ceramic output capacitance - enabling compact, low-noise power delivery in wearable medical devices and smart cards.
For engineers reviewing the MCP1811AT-020/OT datasheet, MCP1811AT-020/OT pinout, MCP1811AT-020/OT application, or MCP1811AT-020/OT equivalent, this page delivers verified electrical specs, package mapping to SOT-23-3, functional role in ultra-low-power sleep-mode regulation, and validated alternative options for design continuity.
Technical Context
The MCP1811AT-020/OT implements a PMOS pass transistor architecture enabling ultra-low dropout voltage (400 mV typical at 150 mA) and minimal ground current (90–110 µA across load). Its integrated output discharge switch (RDCH = 100 Ω typical) actively pulls VOUT to GND when SHDN = GND, eliminating residual voltage hold-up in battery-sensitive systems.
It supports stable operation over –40°C to +85°C junction temperature with ±25 mV load regulation (1 mA to 150 mA) and ±20 mV line regulation (1.8 V < VIN < 5.5 V), meeting stringent requirements for eXtreme Low-Power (XLP) microcontroller supply rails in intermittent-duty applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.0 V ±4% - ensures precise biasing for 2.0 V logic or analog circuitry without external feedback. |
| Max Output Current | 150 mA - sufficient to power ultra-low-power MCUs, sensors, and RF transceivers in duty-cycled systems. |
| Quiescent Current | 250 nA typical - enables multi-year battery life in coin-cell–powered devices operating >99% in sleep mode. |
| Dropout Voltage | 400 mV typical at 150 mA - allows operation down to VIN = 2.4 V while maintaining regulated 2.0 V output. |
| Shutdown Current | 10 nA typical - reduces system standby leakage to negligible levels during deep-sleep states. |
| Stability Capacitor | 1.0 µF ceramic (X7R) - enables small-footprint, low-ESR, low-noise filtering without tantalum or electrolytic components. |
| PSRR | –50 dB at 1 kHz - suppresses ripple from noisy switching supplies or shared battery rails. |
Pinout & Package
Package: 3-Lead SOT-23 (JEDEC MO-178AA), 2.92 mm × 1.3 mm × 1.0 mm body, surface-mount, lead-free, RoHS compliant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input voltage supply | Accepts 1.8 V–5.5 V unregulated input; requires local 1 µF ceramic bypass capacitor. |
| 2 (GND) | Ground reference | Low-impedance return path for regulator ground current; must connect directly to quiet ground plane near output capacitor. |
| 3 (VOUT) | Regulated output | Delivers stable 2.0 V ±4%; connects to load and 1.0 µF ceramic output capacitor (X7R). |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ (250 nA) | Enables >10-year battery life in 10 µA average-current applications using CR2032 cells. |
| Output discharge (100 Ω) | Prevents back-powering of upstream circuits and eliminates VOUT float during shutdown - critical for ISO/IEC 14443 smart card compliance. |
| Ceramic-capacitor stability | Eliminates need for high-ESR capacitors, reducing BOM cost and PCB area by >50% vs. legacy LDOs requiring 10 µF tantalum. |
| Wide input range (1.8–5.5 V) | Supports direct connection to single Li-ion, two alkaline, or energy-harvesting sources without pre-regulation. |
| –40°C to +85°C operation | Validated performance across industrial and medical ambient conditions without derating. |
Applications
| Energy Harvesting Systems | Wearable Medical Devices |
|---|---|
Use Scenario: Powering wireless sensor nodes powered by thermoelectric or piezoelectric harvesters delivering <100 µA average current. IC Role / Device Role / Timing Role: Primary voltage regulator supplying 2.0 V to ultra-low-power MCU and BLE radio during intermittent wake cycles. Use Value: 250 nA quiescent current minimizes harvester energy drain during sleep, extending usable runtime per charge cycle. |
Use Scenario: Regulating power for hearing aids with rechargeable micro-batteries and strict leakage limits. IC Role / Device Role / Timing Role: Main LDO delivering clean 2.0 V to audio codec and DSP under dynamic load (0–150 mA pulses). Use Value: Output discharge prevents residual voltage on VOUT from interfering with battery charging circuitry during device off-state. |
| Smart Card Interfaces | Long-Life IoT Endpoints |
Use Scenario: Providing ISO/IEC 14443-compliant 2.0 V supply to contactless smart card controllers in payment terminals. IC Role / Device Role / Timing Role: Regulator with fast start-up (<400 µs) and controlled VOUT ramp to meet EMV timing constraints. Use Value: Guaranteed ±4% output accuracy and 10 nA shutdown current ensure compliance with card power envelope specifications. |
Use Scenario: Supplying 2.0 V to LoRaWAN node microcontrollers operating on AA batteries for 15+ years. IC Role / Device Role / Timing Role: Sleep-mode regulator enabling sub-µA system leakage while supporting 150 mA burst transmit loads. Use Value: 400 mV dropout at full load permits operation down to 2.4 V input - maximizing usable battery voltage range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2002E/TT | Same 2.0 V output, 250 nA IQ, but no output discharge; SOT-23-3 package. | Lacks active VOUT discharge - unsuitable where residual voltage violates safety or interoperability standards. | Select when output discharge is unnecessary and lowest possible BOM cost is prioritized. |
| TN0702-2.0TR | 2.0 V, 300 nA IQ, 150 mA, no discharge; 3-lead SOT-23, higher dropout (500 mV typ at 150 mA). | Higher dropout and no discharge limit use in low-VIN or fast-shutdown scenarios. | Consider only if Microchip supply chain constraints require second-source qualification. |
Compared with MCP1700T-2002E/TT and TN0702-2.0TR, the MCP1811AT-020/OT uniquely combines 2.0 V regulation, 250 nA IQ, and integrated output discharge in SOT-23-3 - making it the only option for applications requiring both ultra-low leakage and controlled VOUT decay.
Availability
MCP1811AT-020/OT is available at Aetrix Electronics and suitable for energy harvesting systems, wearable medical devices, and smart card interfaces requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MCP1811AT-020/OT 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 microcontroller, analog, FPGA, and mixed-signal semiconductors, headquartered in Chandler, Arizona.
The MCP1811A/B series belongs to Microchip's ultra-low-power LDO family, engineered specifically for battery- and energy-harvesting–powered applications where nanoscale quiescent current and fast, controlled start-up/shutdown behavior are mandatory.
FAQ
What is the maximum input voltage rating for the MCP1811AT-020/OT?
The MCP1811AT-020/OT has an absolute maximum input voltage rating of +6.0 V. Operation above 5.5 V is not recommended, as the device is specified for reliable performance only within the 1.8 V to 5.5 V input range. Exceeding 6.0 V risks permanent damage to the internal PMOS pass element and bandgap reference circuitry.
Does the MCP1811AT-020/OT require an external shutdown control signal?
No - the MCP1811AT-020/OT does not include a dedicated SHDN pin. It is the A-version variant with integrated output discharge functionality, but lacks enable/disable control. The MCP1811AT-020/OT operates continuously when VIN is applied; shutdown is achieved only by removing input voltage. For active control, consider the 5-lead variants like MCP1811A-2002E/MB.
Can the MCP1811AT-020/OT be used with a 0.47 µF output capacitor?
No. The MCP1811AT-020/OT requires a minimum of 1.0 µF X7R ceramic output capacitor for guaranteed stability across all operating conditions. Using 0.47 µF may cause oscillation or poor transient response, especially under load steps up to 150 mA. Microchip's datasheet explicitly specifies 1.0 µF as the minimum stable value for MCP1811X devices.
What is the thermal resistance (θJA) of the MCP1811AT-020/OT in its SOT-23-3 package?
The MCP1811AT-020/OT in the 3-lead SOT-23 package has a typical junction-to-ambient thermal resistance (θJA) of 211.33°C/W when mounted on a JEDEC-standard 4-layer FR4 board with 1 oz. copper. This value assumes no thermal vias or copper pour - adding a 10 mm² thermal pad connected via ≥4 vias can reduce θJA by ~30%.
Is the output voltage accuracy of the MCP1811AT-020/OT affected by load current?
Yes - the MCP1811AT-020/OT exhibits ±25 mV load regulation from 1 mA to 150 mA output current, meaning output voltage may shift up to ±25 mV across that range. At 2.0 V nominal output, this corresponds to ±1.25% deviation. This is fully characterized and included in the ±4% total output tolerance specification over temperature and line variations.
MCP1811AT-020/OT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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:
- SOT-23-5
MCP1811AT-020/OT FAQ
1.How can I place an order for MCP1811AT-020/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1811AT-020/OT 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/OT reliable?
The price and inventory of MCP1811AT-020/OT 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/OT is usually 5 days.
3.What payment methods are accepted for MCP1811AT-020/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1811AT-020/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1811AT-020/OT?
MCP1811AT-020/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1811AT-020/OT 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/OT?
For technical support, including MCP1811AT-020/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1811AT-020/OT requirements.
6.How does Aetrix verify that MCP1811AT-020/OT is sourced from the original manufacturer or authorized distributors?
All MCP1811AT-020/OT 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/OT meets industry standards.
7.What is the process for return or replacement of MCP1811AT-020/OT?
All MCP1811AT-020/OT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1811AT-020/OT, 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/OT part is unused and in its original packaging.
Return procedure for MCP1811AT-020/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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