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Microchip Technology MCP1811BT-020/TT
- Part No.:
- MCP1811BT-020/TT
- Manufacturer:
- Microchip Technology
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MCP1811BT-020/TT.pdf
- Description:
- IC REG LINEAR 2V 150MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,405
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Product details
Overview
MCP1811BT-020/TT from Microchip Technology is a 150 mA ultra-low quiescent current (250 nA typical) fixed-output 2.0V LDO linear regulator in a 3-lead SOT-23 package, featuring 5 nA shutdown current (MCP1811B variant), 400 mV dropout at 150 mA, and stability 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 MCP1811BT-020/TT datasheet, MCP1811BT-020/TT pinout, MCP1811BT-020/TT application, or MCP1811BT-020/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 MCP1811BT-020/TT implements a low-dropout linear regulation architecture optimized for sub-1 µA standby operation, with internal reference and error amplifier driving a PMOS pass transistor. Its shutdown input (SHDN) enables true 5 nA supply current in off-state, distinguishing it from MCP1811A variants that include output discharge.
It operates across 1.8V–5.5V input range while maintaining ±4% output voltage accuracy over –40°C to +85°C junction temperature, and supports dynamic load steps up to 150 mA with <100 mV transient deviation-critical for intermittent sensor wake-up cycles in battery-constrained nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.0 V ±4% - ensures stable bias for 2.0V logic rails or analog sensors without external feedback. |
| Max Output Current | 150 mA - sufficient for microcontrollers, BLE radios, or multi-sensor subsystems in compact wearables. |
| Quiescent Current | 250 nA typical - enables >10-year battery life in coin-cell-powered devices operating >99.9% in sleep mode. |
| Shutdown Current | 5 nA typical - reduces system standby drain to negligible levels when host MCU asserts SHDN = GND. |
| Dropout Voltage | 400 mV @ 150 mA - allows regulation down to VIN = 2.4 V, maximizing usable battery voltage range. |
| Stability Capacitor | 1.0 µF ceramic (X7R) - enables small-footprint, low-ESR, low-noise output filtering without tantalum or electrolytic parts. |
| Operating Temp | –40°C to +85°C - qualified for industrial and medical environments including body-worn devices. |
Pinout & Package
Package: 3-Lead SOT-23 (JEDEC MO-178AA), 2.92 mm × 1.6 mm × 1.1 mm, thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT | Regulated output | Delivers fixed 2.0 V to load; requires 1.0 µF ceramic capacitor to GND for stability and noise suppression. |
| VIN | Input supply | Accepts 1.8–5.5 V input; must be decoupled with ≥1.0 µF ceramic capacitor close to pin for PSRR and transient response. |
| GND | Ground reference | Low-impedance return path for regulator ground current only; tie directly to output capacitor ground for optimal noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 250 nA typical operating current enables decade-scale battery life in duty-cycled IoT endpoints. |
| No output discharge | Unlike MCP1811A, MCP1811B (including MCP1811BT-020/TT) omits discharge transistor-prevents unintended load discharge during shutdown. |
| Ceramic capacitor stable | 1.0 µF X7R ceramic suffices for stability-reduces BOM cost, size, and aging drift vs. tantalum alternatives. |
| 5 nA shutdown | True deep-sleep mode with SHDN = GND cuts supply draw to near-zero, essential for energy-harvesting storage management. |
| Wide input range | 1.8–5.5 V operation supports single-cell Li-ion, Li-SOCl₂, alkaline, or harvested ambient sources without pre-regulation. |
Applications
| Energy Harvesting Node | Smart Wearable Sensor |
|---|---|
Use Scenario: Indoor light or thermal energy harvester powers intermittent environmental sensing every 5 minutes. IC Role / Device Role / Timing Role: LDO provides clean, regulated 2.0 V to ultra-low-power MCU and analog front-end during brief active windows. Use Value: 250 nA quiescent current minimizes harvester storage losses; 5 nA shutdown preserves stored charge between cycles. | Use Scenario: Wrist-worn health monitor with optical heart-rate sensor and BLE radio operating on CR2032 coin cell. IC Role / Device Role / Timing Role: Supplies stable 2.0 V to sensor ASIC and BLE SoC during 10-ms measurement bursts. Use Value: 400 mV dropout extends usable battery voltage down to 2.4 V, adding ~15% runtime vs. higher-dropout regulators. |
| Hearing Aid Front-End | RFID-Powered Medical Tag |
Use Scenario: Miniature hearing aid with MEMS microphone and DSP running on disposable zinc-air battery. IC Role / Device Role / Timing Role: Delivers ripple-free 2.0 V to audio ADC and low-noise amplifier during voice capture. Use Value: Ceramic-capacitor stability and 169 µVrms output noise ensure high-fidelity signal integrity without added filtering. | Use Scenario: Passive UHF RFID tag with integrated temperature sensor activated by reader field. IC Role / Device Role / Timing Role: Regulates harvested RF energy to 2.0 V for sensor readout and backscatter modulation. Use Value: 1.8 V minimum input enables operation under weak or distant reader fields where rectified voltage dips below 2.0 V. |
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/TT | Includes output discharge transistor (RDCH ≈ 100 Ω); 10 nA shutdown current vs. 5 nA. | Required where rapid VOUT discharge after shutdown prevents latch-up or leakage in downstream circuitry. | Select only if output discharge is explicitly needed; otherwise MCP1811BT-020/TT offers lower shutdown IQ. |
| Torex XC6210B202MR-G | 200 nA IQ, 250 mA output, 300 mV dropout @ 200 mA; SOT-23-5 package with EN and CL pins. | Higher current and lower dropout suit more demanding loads, but adds enable control complexity and footprint. | Choose when >150 mA or <400 mV dropout is required; verify PCB layout compatibility with 5-pin SOT-23. |
Compared with MCP1811AT-020/TT, the MCP1811BT-020/TT trades output discharge capability for 2× lower shutdown current-ideal for energy-limited systems where residual VOUT hold-up is acceptable. Against XC6210B202MR-G, it offers simpler 3-pin integration and proven Microchip reliability at the cost of 50 mA less output capacity.
Availability
MCP1811BT-020/TT is available at Aetrix Electronics and suitable for energy harvesting nodes, wearable health monitors, and hearing aid front-ends requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MCP1811BT-020/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 is a leading provider of microcontroller, analog, and FPGA solutions, with broad expertise in ultra-low-power design and mixed-signal integration.
The MCP1811X/12X family was engineered specifically for multi-year battery operation in space- and power-constrained edge devices-emphasizing nanoscale IQ, ceramic-capacitor compatibility, and robust thermal performance in miniature packages.
FAQ
What is the output voltage tolerance of the MCP1811BT-020/TT over temperature and load?
The MCP1811BT-020/TT maintains output voltage within ±4% of nominal 2.0 V across –40°C to +85°C junction temperature and 0–150 mA load, per DS20006088C electrical specifications. This tolerance includes line regulation (±20 mV), load regulation (±25 mV), and initial accuracy-ensuring reliable operation for 2.0 V logic and precision analog circuits without external trimming.
Does the MCP1811BT-020/TT require an input capacitor, and if so, what value is recommended?
Yes, the MCP1811BT-020/TT requires a minimum 1.0 µF ceramic (X7R) input capacitor placed as close as possible to the VIN and GND pins. This capacitor stabilizes the input rail during load transients and improves PSRR-especially critical when powered from high-impedance sources like energy harvesters or aging batteries.
How does the shutdown functionality work on the MCP1811BT-020/TT, and what voltage level activates it?
The MCP1811BT-020/TT enters shutdown when the SHDN pin is pulled to GND (logic low ≤20% VIN). In this state, it draws only 5 nA typical supply current and disables the pass transistor-halting output regulation. The SHDN pin has leakage <0.5 nA at GND, enabling direct connection to MCU GPIO without pull-down resistors.
Can the MCP1811BT-020/TT be used with a 1.0 µF output capacitor, and is it stable with all ceramic dielectrics?
Yes-the MCP1811BT-020/TT is explicitly characterized and guaranteed stable with 1.0 µF X7R ceramic capacitors. While other dielectrics (e.g., X5R) may function, X7R is recommended for its stable capacitance over temperature and DC bias-ensuring consistent loop stability and transient response across the full operating range of the MCP1811BT-020/TT.
What is the maximum power dissipation limit for the MCP1811BT-020/TT in SOT-23 package at +85°C ambient?
With θJA = 211.33°C/W (JEDEC 4-layer board), the MCP1811BT-020/TT's maximum continuous power dissipation at TA = +85°C is ~189 mW before reaching TJ = +125°C. At 150 mA load and 2.4 V input (0.4 V dropout), power dissipation is 60 mW-well within safe limits, allowing full-rated output current even in thermally constrained layouts.
MCP1811BT-020/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):
- 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-23-3
MCP1811BT-020/TT FAQ
1.How can I place an order for MCP1811BT-020/TT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1811BT-020/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 MCP1811BT-020/TT reliable?
The price and inventory of MCP1811BT-020/TT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1811BT-020/TT is usually 5 days.
3.What payment methods are accepted for MCP1811BT-020/TT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1811BT-020/TT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1811BT-020/TT?
MCP1811BT-020/TT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1811BT-020/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 MCP1811BT-020/TT?
For technical support, including MCP1811BT-020/TT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1811BT-020/TT requirements.
6.How does Aetrix verify that MCP1811BT-020/TT is sourced from the original manufacturer or authorized distributors?
All MCP1811BT-020/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 MCP1811BT-020/TT meets industry standards.
7.What is the process for return or replacement of MCP1811BT-020/TT?
All MCP1811BT-020/TT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1811BT-020/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 MCP1811BT-020/TT part is unused and in its original packaging.
Return procedure for MCP1811BT-020/TT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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