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Microchip Technology MCP1811AT-010/TT
- Part No.:
- MCP1811AT-010/TT
- Manufacturer:
- Microchip Technology
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MCP1811AT-010/TT.pdf
- Description:
- IC REG LINEAR 1V 150MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,591
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Product details
Overview
MCP1811AT-010/TT from Microchip Technology is a 150 mA ultra-low quiescent current (250 nA typical) fixed-output 1.0 V low-dropout linear regulator in 3-lead SOT-23 package, featuring output discharge during shutdown and stable operation with 1.0 µF ceramic output capacitor. It targets energy harvesting and long-life battery-powered systems where sleep-mode power budget is critical.
For engineers reviewing the MCP1811AT-010/TT datasheet, MCP1811AT-010/TT pinout, MCP1811AT-010/TT application, or MCP1811AT-010/TT equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases in wearable and medical electronics, and validated alternative options for ultra-low-power LDO selection.
Technical Context
The MCP1811AT-010/TT 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 internal error amplifier and reference circuit maintain ±4% output voltage accuracy over -40°C to +85°C junction temperature.
It integrates an active discharge transistor (RDCH = 100 Ω typical) tied to the SHDN pin, enabling rapid VOUT collapse when disabled - a key requirement for systems needing controlled power sequencing and zero standby leakage. Shutdown current is 10 nA typical, confirmed for MCP1811A variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.0 V ±4% - ensures stable core supply for ultra-low-voltage MCUs and sensors without external feedback. |
| Max Output Current | 150 mA - sufficient to power BLE SoCs, NFC controllers, or sensor hubs in compact wearables. |
| Quiescent Current | 250 nA typical - enables multi-year battery life in coin-cell-powered devices operating >99.9% in sleep mode. |
| Shutdown Current | 10 nA typical - eliminates parasitic drain during system hibernation, critical for energy-harvesting storage buffers. |
| Dropout Voltage | 400 mV typical at 150 mA - allows regulation down to VIN = 1.4 V, maximizing usable battery voltage range. |
| Stability Capacitor | 1.0 µF ceramic (X7R) - reduces BOM count and PCB area vs. tantalum; enables low-noise (<170 µVrms) analog supply rails. |
| Operating Input Range | 1.8 V to 5.5 V - supports single-cell Li-ion, LiFePO₄, alkaline, or supercapacitor inputs without pre-regulation. |
Pinout & Package
Package: 3-Lead SOT-23 (JEDEC MO-178AA), 2.92 mm × 1.3 mm × 1.0 mm body, gull-wing leads, thermal pad not present.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input voltage supply | Accepts 1.8–5.5 V input; requires local 1 µF ceramic bypass capacitor to minimize PSRR degradation. |
| 2 (GND) | Ground reference | Low-impedance return path for regulator ground current only; must connect directly to output capacitor cathode for optimal noise rejection. |
| 3 (VOUT) | Regulated output | Delivers fixed 1.0 V; requires ≥1.0 µF X7R ceramic capacitor for stability and transient response; no external feedback needed. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 250 nA typical operation enables >10-year shelf life on CR2032 in intermittent-sensing applications. |
| Output discharge | Active discharge transistor (100 Ω) pulls VOUT to GND within microseconds of SHDN assertion - prevents back-powering of upstream circuits. |
| Ceramic capacitor stability | Guaranteed stable with 1.0 µF X7R ceramic - eliminates ESR requirements and simplifies layout for space-constrained wearables. |
| Wide input range | 1.8–5.5 V operation supports direct connection to harvested energy sources (e.g., solar, RF, thermal) without boost converter. |
| High PSRR | -50 dB at 1 kHz (no CIN) - suppresses ripple from noisy switching supplies feeding mixed-signal SoCs. |
Applications
| Energy Harvesting Node | Smart Wearable Sensor Hub |
|---|---|
Use Scenario: Indoor light-harvesting system powering a temperature/humidity sensor node with intermittent BLE transmission. IC Role / Device Role / Timing Role: Primary 1.0 V supply for ultra-low-power MCU and sensor interface; regulates variable output of amorphous silicon PV cell. Use Value: 250 nA IQ extends usable energy window by >3× vs. conventional LDOs, enabling reliable operation under low-light conditions. |
Use Scenario: Compact wrist-worn health monitor with optical heart-rate sensor and motion processor. IC Role / Device Role / Timing Role: Clean 1.0 V rail for analog front-end and low-voltage digital logic; discharge function prevents residual charge from interfering with sensor calibration cycles. Use Value: 1.0 µF ceramic stability reduces board area by 40% vs. tantalum-based solutions while maintaining <170 µVrms noise floor. |
| Hearing Aid Power Management | Secure Smart Card Interface |
Use Scenario: Rechargeable hearing aid using zinc-air or Li-ion micro-battery with aggressive duty cycling. IC Role / Device Role / Timing Role: Main regulator for DSP and audio codec; shutdown mode activated between voice detection windows. Use Value: 10 nA shutdown current prevents >1% monthly self-discharge - critical for devices requiring 6+ month shelf life. |
Use Scenario: Contactless payment card with embedded secure element and RF transceiver. IC Role / Device Role / Timing Role: Regulated 1.0 V supply for cryptographic IC; fast VOUT discharge ensures secure reset after RF field removal. Use Value: Sub-1 µs discharge time meets EMVCo timing requirements for tamper-resistant power-down sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1002E/TT | Same 1.0 V output, 250 nA IQ, but no output discharge; 150 mA rating; SOT-23-3 package. | Lacks active VOUT discharge - unsuitable where rapid rail collapse is required for security or sequencing. | Select when lowest possible cost and footprint are prioritized and discharge is not needed. |
| TPL7407LDR | 1.0 V, 200 nA IQ, 150 mA, no discharge; 6-pin SOT-23 with integrated logic-level drivers. | Includes 7-channel high-side drivers - adds functionality but increases size and complexity for pure regulation needs. | Choose only if driver integration offsets added BOM and layout overhead in multi-load systems. |
Compared with MCP1700T-1002E/TT, the MCP1811AT-010/TT provides essential output discharge for secure power-down; versus TPL7407LDR, it offers smaller footprint and lower system-level noise, making it preferable for dedicated ultra-low-power analog/digital rails.
Availability
MCP1811AT-010/TT is available at Aetrix Electronics and suitable for energy harvesting nodes, wearable sensor hubs, and hearing aid power management requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MCP1811AT-010/TT 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, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The MCP1811A/B family was designed specifically for ultra-low-power battery and energy-harvesting applications, emphasizing nanoscale quiescent current, ceramic-capacitor compatibility, and robust shutdown behavior in miniature packages.
FAQ
What is the maximum input voltage rating for the MCP1811AT-010/TT?
The MCP1811AT-010/TT 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 1.8 V to 5.5 V continuous input operation. Exceeding 6.0 V risks permanent damage per DS20006088C-page 4 Absolute Maximum Ratings.
Does the MCP1811AT-010/TT require an external shutdown control signal?
No - the MCP1811AT-010/TT does not include a dedicated SHDN pin. As a 3-lead SOT-23 variant (VIN, GND, VOUT), it lacks enable/disable functionality. The "A" suffix in MCP1811A denotes output discharge capability, but that feature is internal and always active upon power removal; no external control is provided for this part number.
Can the MCP1811AT-010/TT be used with a 0.47 µF output capacitor?
No - the MCP1811AT-010/TT requires a minimum of 1.0 µF ceramic (X7R) output capacitance for guaranteed stability, as specified in DS20006088C-page 1 and Table 1-1. Using 0.47 µF may cause oscillation or poor transient response, especially under load steps up to 150 mA.
What is the thermal resistance (θJA) of the MCP1811AT-010/TT in its SOT-23 package?
The MCP1811AT-010/TT in 3-lead SOT-23 has a thermal resistance θJA of 211.33°C/W on a JEDEC standard 4-layer FR4 board with 1 oz. copper, per DS20006088C-page 6. This value assumes no thermal vias; adding vias beneath the pad can reduce effective θJA by ~30–40%.
Is the output voltage tolerance of the MCP1811AT-010/TT affected by load current?
Yes - load regulation for the MCP1811AT-010/TT is ±25 mV over 1 mA to 150 mA (DS20006088C-page 5), meaning output voltage may shift up to ±25 mV from nominal 1.0 V under full load. This is independent of the ±4% initial accuracy and must be included in system margining for precision analog circuits.
MCP1811AT-010/TT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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-23-3
MCP1811AT-010/TT FAQ
1.How can I place an order for MCP1811AT-010/TT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1811AT-010/TT 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/TT reliable?
The price and inventory of MCP1811AT-010/TT 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/TT is usually 5 days.
3.What payment methods are accepted for MCP1811AT-010/TT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1811AT-010/TT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1811AT-010/TT?
MCP1811AT-010/TT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1811AT-010/TT 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/TT?
For technical support, including MCP1811AT-010/TT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1811AT-010/TT requirements.
6.How does Aetrix verify that MCP1811AT-010/TT is sourced from the original manufacturer or authorized distributors?
All MCP1811AT-010/TT 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/TT meets industry standards.
7.What is the process for return or replacement of MCP1811AT-010/TT?
All MCP1811AT-010/TT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1811AT-010/TT, 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/TT part is unused and in its original packaging.
Return procedure for MCP1811AT-010/TT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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