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Microchip Technology MCP1811BT-020/OT
- Part No.:
- MCP1811BT-020/OT
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MCP1811BT-020/OT.pdf
- Description:
- IC REG LINEAR 2V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,880
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Product details
Overview
MCP1811BT-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, 1.8–5.5 V input range, and shutdown capability (5 nA typical for MCP1811B variant). It features output discharge disable (MCP1811B), stable operation with 1.0 µF ceramic output capacitor, and overcurrent protection - designed for energy harvesting and long-life battery-powered systems such as hearing aids and smart wearables.
For engineers reviewing the MCP1811BT-020/OT datasheet, MCP1811BT-020/OT pinout, MCP1811BT-020/OT application, or MCP1811BT-020/OT equivalent, key selection criteria include its 2.0 V fixed output, 5 nA shutdown current, SOT-23-3 package compatibility, thermal performance on JEDEC 4-layer board (θJA = 211.33°C/W), and absence of output discharge functionality compared to MCP1811A variants.
Technical Context
The MCP1811BT-020/OT belongs to the MCP1811B subfamily, distinguished by its 5 nA typical shutdown supply current and lack of output discharge transistor (unlike MCP1811A). Its LDO architecture delivers regulated 2.0 V output with ±4% tolerance across –40°C to +85°C junction temperature, supporting load currents up to 150 mA while maintaining dropout voltage ≤600 mV at full load.
It operates with minimal external components: only a 1.0 µF X7R ceramic output capacitor is required for stability, and no input capacitor is mandatory. The device uses internal error amplifier and current-limit circuitry to provide foldback overcurrent protection (50 mA at RLOAD = 1 Ω) and maintains PSRR of –50 dB at 1 kHz under full-load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.0 V ±4% - ensures precise rail generation for 2.0 V logic or analog subsystems without external feedback. |
| Quiescent Current | 250 nA typical - enables multi-year battery life in sleep-mode IoT sensors and medical implants. |
| Shutdown Current | 5 nA typical - critical for zero-power standby in energy-harvesting nodes with intermittent wake-up cycles. |
| Max Output Current | 150 mA - sufficient to power microcontrollers (e.g., PIC XLP), RF transceivers, or sensor signal chains. |
| Input Voltage Range | 1.8 V to 5.5 V - supports direct connection to single-cell Li-ion, LiFePO₄, or multi-cell alkaline batteries. |
| Dropout Voltage | 600 mV max at 150 mA - allows regulation down to 2.6 V input when delivering 2.0 V output. |
| Stability Capacitor | 1.0 µF ceramic (X7R) - reduces BOM count and PCB area vs. electrolytic/tantalum alternatives. |
Pinout & Package
Package: 3-Lead SOT-23 (JEDEC MO-178AA), surface-mount, lead-free, RoHS-compliant. Thermal resistance θJA = 211.33°C/W on standard 4-layer FR4 board with 1 oz. copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input voltage supply | Accepts 1.8–5.5 V unregulated input; requires local decoupling if noisy source is used. |
| VOUT | Regulated output | Delivers stable 2.0 V; must connect ≥1.0 µF ceramic capacitor directly between VOUT and GND for stability. |
| GND | Ground reference | Low-impedance return path for load and regulator ground current; tie to quiet ground plane or output capacitor return. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low shutdown current | 5 nA typical enables >10-year shelf life in battery-backed devices with infrequent wake-up. |
| No output discharge | Omits discharge transistor - prevents unintended VOUT collapse during shutdown, preserving state in downstream circuits. |
| Ceramic-capacitor stability | 1.0 µF X7R ceramic suffices for stability - eliminates ESR requirements and simplifies layout. |
| Foldback overcurrent protection | Limits short-circuit current to ~50 mA - protects IC and source during fault without thermal runaway. |
| Wide input voltage range | 1.8–5.5 V accommodates aging batteries and diverse energy harvesters (e.g., solar, thermal, RF). |
Applications
| Energy Harvesting Node | Long-Life Medical Implant |
|---|---|
Use Scenario: Indoor light-powered sensor node harvesting microwatts from ambient light, transmitting temperature data every 5 minutes. IC Role / Device Role: Primary voltage regulator supplying 2.0 V to ultra-low-power MCU and BLE radio during brief active bursts. Use Value: 250 nA quiescent current and 5 nA shutdown minimize energy drain between transmissions, extending operational life beyond 5 years on a single thin-film battery. | Use Scenario: Miniaturized hearing aid with rechargeable micro-LiPo battery requiring continuous 2.0 V bias for audio ADC and DSP core. IC Role / Device Role: Main power rail regulator enabling deep-sleep modes where only real-time clock remains active. Use Value: Absence of output discharge prevents loss of bias on sensitive analog front-end during sleep, eliminating startup re-calibration delays. |
| Smart Wearable Tracker | Secure Smart Card |
Use Scenario: Wrist-worn activity monitor powered by coin-cell battery, sampling accelerometer data hourly and logging locally. IC Role / Device Role: Fixed-output LDO powering 2.0 V I²C sensors and flash memory during logging intervals. Use Value: Stable 2.0 V output with ±4% tolerance ensures consistent sensor accuracy and flash write margins across battery discharge curve. | Use Scenario: Contactless payment card with embedded secure element and NFC interface operating from harvested RF energy. IC Role / Device Role: Regulator providing clean 2.0 V supply to cryptographic processor during secure transaction handshake. Use Value: Low noise and –50 dB PSRR at 1 kHz suppress coupling from NFC carrier frequency, preventing crypto timing side-channel leakage. |
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 | Includes output discharge transistor (RDCH ≈ 100 Ω); shutdown current 10 nA typical. | Required when rapid VOUT discharge on shutdown is needed to reset downstream logic or prevent latch-up. | Select MCP1811AT-020/OT only if system design mandates controlled VOUT ramp-down; otherwise MCP1811BT-020/OT saves power and simplifies bias sequencing. |
| Torex XC6210B202MR-G | 250 nA IQ, 200 mA output, 1.0 µF ceramic stable, but no shutdown pin - always-on operation. | Suitable for always-active monitoring nodes where shutdown control is unnecessary and higher output current is beneficial. | Choose XC6210B202MR-G when shutdown functionality is not required and 200 mA peak load capability is preferred over 5 nA shutdown current. |
Compared with MCP1811AT-020/OT, the MCP1811BT-020/OT trades output discharge for 5× lower shutdown current - critical for intermittent-energy systems. Against XC6210B202MR-G, it adds shutdown control at the cost of 50 mA lower output rating, making it optimal for duty-cycled, battery-constrained designs.
Availability
MCP1811BT-020/OT is available at Aetrix Electronics and suitable for energy harvesting nodes, wearable medical devices, and secure smart cards requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MCP1811BT-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, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.
The MCP1811 family targets ultra-low-power applications where nanowatt-level quiescent current and small footprint are essential - specifically engineered for battery- and energy-harvesting–powered edge devices demanding decade-long operational life.
FAQ
What is the output voltage tolerance of the MCP1811BT-020/OT over temperature and load?
The MCP1811BT-020/OT delivers a nominal 2.0 V output with ±4% tolerance across its full operating junction temperature range (–40°C to +85°C) and load current range (0–150 mA), as specified in the DS20006088C datasheet under AC/DC Characteristics. This tolerance includes line, load, and temperature effects - no additional derating is required for compliant designs.
Does the MCP1811BT-020/OT require an input capacitor?
No, the MCP1811BT-020/OT does not require an input capacitor for stability. The datasheet specifies stable operation with only a 1.0 µF ceramic output capacitor (X7R dielectric). An input capacitor may be added for noise filtering in electrically noisy environments, but it is not necessary for regulation integrity or loop stability.
How does the MCP1811BT-020/OT differ from the MCP1811AT-020/OT?
The MCP1811BT-020/OT is the "B" variant, meaning it lacks the output discharge transistor present in the "A" variant (MCP1811AT-020/OT). As a result, MCP1811BT-020/OT draws only 5 nA typical in shutdown versus 10 nA for the "A" version, and VOUT remains floating (not actively discharged) when SHDN is asserted - preserving bias on downstream circuitry.
What is the minimum input voltage required for the MCP1811BT-020/OT to regulate 2.0 V at 150 mA?
At 150 mA load, the MCP1811BT-020/OT requires a minimum input voltage of 2.6 V, based on its maximum dropout voltage of 600 mV (2.0 V + 0.6 V). This value is validated per Figure 2-11 (Dropout Voltage vs. Load Current, VR = 4.0 V) and Table 1-1 in DS20006088C, extrapolated to 2.0 V output using the same dropout characteristics.
Can the MCP1811BT-020/OT be used with a 1.5 V input supply?
No - the MCP1811BT-020/OT has a minimum input voltage specification of 1.8 V per the Absolute Maximum Ratings and Electrical Characteristics tables. At 1.5 V input, the device will not regulate and enters undervoltage lockout; output will follow input or remain undefined. For sub-1.8 V operation, consider Microchip's MCP1700 series or alternative nanowatt LDOs rated for lower VIN.
MCP1811BT-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
MCP1811BT-020/OT FAQ
1.How can I place an order for MCP1811BT-020/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1811BT-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 MCP1811BT-020/OT reliable?
The price and inventory of MCP1811BT-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 MCP1811BT-020/OT is usually 5 days.
3.What payment methods are accepted for MCP1811BT-020/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1811BT-020/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1811BT-020/OT?
MCP1811BT-020/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1811BT-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 MCP1811BT-020/OT?
For technical support, including MCP1811BT-020/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1811BT-020/OT requirements.
6.How does Aetrix verify that MCP1811BT-020/OT is sourced from the original manufacturer or authorized distributors?
All MCP1811BT-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 MCP1811BT-020/OT meets industry standards.
7.What is the process for return or replacement of MCP1811BT-020/OT?
All MCP1811BT-020/OT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1811BT-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 MCP1811BT-020/OT part is unused and in its original packaging.
Return procedure for MCP1811BT-020/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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