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Microchip Technology MCP1811AT-010/OT
- Part No.:
- MCP1811AT-010/OT
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MCP1811AT-010/OT.pdf
- Description:
- IC REG LINEAR 1V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,400
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Product details
Overview
MCP1811AT-010/OT from Microchip Technology is an ultra-low quiescent current (250 nA typical) 150 mA low-dropout linear regulator with fixed 1.0 V output, 1.8–5.5 V input range, and output discharge functionality during shutdown - designed for energy harvesting, wearable electronics, and medical hearing aids where multi-year battery life is critical.
For engineers reviewing the MCP1811AT-010/OT datasheet, MCP1811AT-010/OT pinout, MCP1811AT-010/OT application, or MCP1811AT-010/OT equivalent, this page delivers verified package mapping (SOT-23), confirmed shutdown current (10 nA typical), ceramic capacitor stability (1.0 µF), dropout voltage (400 mV @ 150 mA), and real-world use cases in ultra-low-power sensor nodes and implantable-grade devices.
Technical Context
The MCP1811AT-010/OT implements a PMOS pass transistor architecture enabling ultra-low IQ operation and fast start-up (400 µs delay from SHDN). Its integrated discharge transistor (100 Ω typical) actively pulls VOUT to GND during shutdown, eliminating residual voltage hold-up in battery-sensitive systems.
It operates across –40°C to +85°C junction temperature, supports stable regulation with only 1.0 µF X7R ceramic output capacitance, and maintains ±25 mV load regulation from 1 mA to 150 mA - making it suitable for dynamically varying loads in sleep-wake cycling applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.0 V ±4% - enables direct powering of 1.0 V logic cores and ultra-low-voltage microcontrollers. |
| Quiescent Current | 250 nA typical - reduces battery drain to <1 µAh/year, extending shelf life in sealed medical devices. |
| Shutdown Current | 10 nA typical - ensures near-zero standby leakage when paired with external wake-up controllers. |
| Max Output Current | 150 mA - sufficient for BLE SoCs, optical sensors, and low-power ADCs without thermal derating at ambient. |
| Dropout Voltage | 400 mV @ 150 mA - allows operation down to 1.4 V input, compatible with single-cell Li-SOCl₂ or two-cell alkaline sources. |
| Input Voltage Range | 1.8 V to 5.5 V - accommodates wide battery chemistries including Li-MnO₂, Li-FeS₂, and regulated 3.3 V rails. |
| Output Capacitor | 1.0 µF ceramic (X7R) - minimizes board area and cost while ensuring stability and low noise (<170 µVrms). |
Pinout & Package
Package: 3-Lead SOT-23 (JEDEC MO-178AA), footprint-compatible with SC70 but with higher thermal resistance (θJA = 211.33°C/W on 4-layer FR4).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 1.8–5.5 V; requires local 1 µF ceramic bypass; internal overcurrent protection limits fault current to 250 mA. |
| VOUT | Regulated output | Delivers stable 1.0 V; must be decoupled with ≥1.0 µF X7R ceramic; discharge path active when SHDN = GND. |
| GND | Ground reference | Low-impedance return for regulator core and discharge switch; tie directly to output capacitor ground pad for optimal PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ operation | 250 nA typical enables >10-year battery life in 10 µA average-load IoT endpoints. |
| Active output discharge | 100 Ω discharge transistor eliminates VOUT hold-up, preventing unintended wake-up or data corruption during power cycling. |
| Ceramic capacitor stability | Stable with 1.0 µF X7R - avoids costly tantalum or electrolytic capacitors and reduces EMI susceptibility. |
| Wide input voltage range | 1.8–5.5 V supports direct connection to primary batteries, harvested energy buffers, and legacy 3.3 V/5 V rails. |
| High PSRR at 1 kHz | –50 dB (no CIN) suppresses ripple from noisy switching supplies feeding the LDO input. |
Applications
| Energy Harvesting Node | Wearable Health Monitor |
|---|---|
Use Scenario: Indoor light-harvesting system powering a temperature/humidity sensor with BLE transmission every 5 minutes. IC Role / Device Role / Timing Role: Primary voltage regulator converting variable 2.0–4.2 V harvester output to stable 1.0 V for MCU and RF transceiver. Use Value: 250 nA IQ prevents self-discharge of supercapacitor storage, enabling >6 months operation per 100 µJ/cycle harvest. | Use Scenario: Disposable smart patch monitoring skin temperature and ECG for 7-day clinical trials. IC Role / Device Role / Timing Role: Single-output LDO supplying 1.0 V to ultra-low-power ARM Cortex-M0+ MCU and analog front-end. Use Value: Output discharge ensures rapid VOUT collapse upon removal, meeting IEC 62366 usability and safety requirements. |
| Hearing Aid Power Management | Smart Card Secure Element |
Use Scenario: Rechargeable zinc-air battery-powered hearing aid with adaptive gain control and Bluetooth LE streaming. IC Role / Device Role / Timing Role: Main regulator delivering clean 1.0 V to DSP and audio codec during burst-mode processing. Use Value: 400 mV dropout allows full utilization of declining 1.2 V battery voltage, extending usable runtime by 18% vs. higher-dropout alternatives. | Use Scenario: Contactless EMV-compliant payment card with embedded secure microcontroller and RF interface. IC Role / Device Role / Timing Role: Low-noise 1.0 V supply for cryptographic engine and EEPROM during RF field coupling. Use Value: 169 µVrms output noise (10 Hz–100 kHz) prevents bit errors in sensitive crypto operations under RF interference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1002E/MB | Same 1.0 V output, 250 nA IQ, but no output discharge; 6 V max input; SOT-23-3 package. | Lacks active VOUT discharge - unsuitable where rapid power-down sequencing is required. | Select when discharge is unnecessary and higher input voltage margin (6 V) is needed. |
| TN0120N100B | 1.0 V, 200 nA IQ, 150 mA, no discharge; 5.5 V max input; same SOT-23-3 footprint. | Lower IQ but no discharge path; slightly tighter output tolerance (±2% vs. ±4%). | Prefer for longest possible battery life where discharge is handled externally or not required. |
Compared with MCP1700T-1002E/MB and TN0120N100B, the MCP1811AT-010/OT uniquely combines 10 nA shutdown current, integrated output discharge, and guaranteed 150 mA delivery at 1.0 V - making it the only choice for space-constrained, battery-sealed systems requiring deterministic power-down behavior.
Availability
MCP1811AT-010/OT is available at Aetrix Electronics and suitable for energy harvesting nodes, wearable health monitors, and hearing aid power management requiring stable component supply with long-term lifecycle assurance.
Supply support for MCP1811AT-010/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 is a leading provider of microcontrollers, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.
The MCP1811A/B series belongs to Microchip's ultra-low-power LDO family, engineered specifically for battery-operated edge devices where nanowatt-level standby consumption and rapid wake-up response are mandatory design constraints.
FAQ
What is the maximum continuous output current of the MCP1811AT-010/OT?
The MCP1811AT-010/OT delivers up to 150 mA continuously under specified thermal conditions (TA ≤ +85°C, θJA = 211.33°C/W on JEDEC 4-layer board). At 150 mA load and 1.8 V input, dropout is 400 mV typical, ensuring regulation remains stable without thermal shutdown.
Does the MCP1811AT-010/OT require an input capacitor?
The MCP1811AT-010/OT does not require an input capacitor for stability, though a 1 µF ceramic capacitor is recommended at VIN to suppress high-frequency noise and improve PSRR. The device is fully stable with only the 1.0 µF output capacitor, reducing BOM count and PCB area.
How does the output discharge function work in the MCP1811AT-010/OT?
When SHDN is pulled low, the MCP1811AT-010/OT activates an internal 100 Ω discharge transistor between VOUT and GND, discharging the output capacitor within microseconds. This prevents residual voltage from powering downstream circuitry or causing latch-up during hot-swap or battery replacement scenarios.
Can the MCP1811AT-010/OT operate with a 1.5 V input supply?
No - the MCP1811AT-010/OT has a minimum input voltage of 1.8 V per datasheet specifications. At 1.0 V output and 400 mV typical dropout, the absolute minimum functional input is 1.4 V, but the device will not enable or regulate below 1.8 V due to internal bandgap and bias circuit requirements.
Is the MCP1811AT-010/OT RoHS compliant and halogen-free?
Yes - the MCP1811AT-010/OT is RoHS compliant and halogen-free per Microchip's standard product definitions (documented in packaging specification 80000597C). It meets JEDEC J-STD-020 moisture sensitivity level 1 and is qualified for industrial temperature operation (–40°C to +85°C).
MCP1811AT-010/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):
- 1V
- 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-010/OT FAQ
1.How can I place an order for MCP1811AT-010/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1811AT-010/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-010/OT reliable?
The price and inventory of MCP1811AT-010/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-010/OT is usually 5 days.
3.What payment methods are accepted for MCP1811AT-010/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1811AT-010/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1811AT-010/OT?
MCP1811AT-010/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1811AT-010/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-010/OT?
For technical support, including MCP1811AT-010/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1811AT-010/OT requirements.
6.How does Aetrix verify that MCP1811AT-010/OT is sourced from the original manufacturer or authorized distributors?
All MCP1811AT-010/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-010/OT meets industry standards.
7.What is the process for return or replacement of MCP1811AT-010/OT?
All MCP1811AT-010/OT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1811AT-010/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-010/OT part is unused and in its original packaging.
Return procedure for MCP1811AT-010/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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