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Microchip Technology MCP1811BT-018/TT
- Part No.:
- MCP1811BT-018/TT
- Manufacturer:
- Microchip Technology
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MCP1811BT-018/TT.pdf
- Description:
- IC REG LINEAR 1.8V 150MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,134
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Product details
Overview
MCP1811BT-018/TT from Microchip Technology is a 150 mA ultra-low quiescent current (250 nA typical) fixed-output 1.8 V low-dropout linear regulator in 3-lead SOT-23 package, designed for energy harvesting and long-life battery-powered systems requiring stable voltage under microampere load conditions and shutdown current as low as 5 nA.
For engineers reviewing the MCP1811BT-018/TT datasheet, MCP1811BT-018/TT pinout, MCP1811BT-018/TT application, or MCP1811BT-018/TT equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases in wearable and medical electronics, and validated alternative parts with documented functional and application-level differences.
Technical Context
The MCP1811BT-018/TT implements a PMOS pass transistor architecture enabling ultra-low dropout voltage (400 mV typical at 150 mA) and stable operation with only 1.0 µF ceramic output capacitance. Its internal reference and error amplifier maintain ±4% output voltage accuracy across -40°C to +85°C junction temperature.
It features active shutdown control via SHDN pin, delivering 5 nA typical supply current in shutdown mode (MCP1811B variant), and includes overcurrent protection plus output discharge functionality exclusive to MCP1811A variants - which the "B" suffix confirms is omitted here.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±4% - ensures compatibility with 1.8 V logic rails and low-power microcontrollers without external feedback. |
| Max Output Current | 150 mA - supports moderate-current peripherals (e.g., BLE radios, sensors) while maintaining ultra-low IQ. |
| Quiescent Current | 250 nA typical - enables multi-year battery life in sleep-dominated applications like smart wearables. |
| Shutdown Current | 5 nA typical - critical for energy harvesting systems where leakage must be minimized during idle periods. |
| Input Voltage Range | 1.8 V to 5.5 V - allows direct operation from single-cell Li-ion, LiFePO₄, or multi-cell alkaline sources. |
| Dropout Voltage | 400 mV typical at 150 mA - enables regulation down to ~2.2 V input when sourcing full load, maximizing usable battery capacity. |
| Stability | Stable with ≥1.0 µF X7R ceramic capacitor - reduces BOM cost and PCB area vs. tantalum or electrolytic alternatives. |
Pinout & Package
Package: 3-Lead SOT-23 (JEDEC MO-178AA), surface-mount, 2.92 mm × 1.3 mm × 1.0 mm body height, thermal pad not included.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input voltage supply | Accepts 1.8–5.5 V input; connects to bulk decoupling capacitor; must be routed with low-impedance path to minimize noise coupling. |
| VOUT | Regulated output | Delivers fixed 1.8 V; requires ≥1.0 µF ceramic capacitor placed adjacent to pin for stability and transient response. |
| GND | Ground reference | Return path for load and internal circuitry; must connect directly to quiet ground plane or output capacitor cathode to optimize PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ operation | 250 nA typical enables >10-year battery life in devices drawing <1 µA average current (e.g., environmental sensors). |
| Sub-10 nA shutdown | 5 nA typical shutdown current eliminates parasitic drain in energy-harvesting storage circuits between charge cycles. |
| Ceramic-capacitor stability | Guaranteed stable with 1.0 µF X7R ceramic output cap - avoids ESR sensitivity and simplifies layout vs. older LDOs. |
| Overcurrent protection | Current-limit threshold of 250 mA (typical) prevents damage during short-circuit or inrush events without external components. |
| Wide temperature range | Specified for -40°C to +85°C operating junction temperature - suitable for industrial and medical environments. |
Applications
| Energy Harvesting Systems | Wearable Electronics |
|---|---|
Use Scenario: Powering wireless sensor nodes powered by solar, thermal, or RF harvesters with intermittent, low-energy input. IC Role / Device Role / Timing Role: Primary voltage regulator converting harvested microwatt-to-milliwatt energy into stable 1.8 V for MCU and radio operation. Use Value: 5 nA shutdown current preserves stored energy during dark/low-gradient periods; 250 nA IQ extends operational duty cycle per harvest event. |
Use Scenario: Supplying power to compact fitness trackers and smart earbuds with coin-cell or thin-film batteries. IC Role / Device Role / Timing Role: Main system regulator for 1.8 V I/O and core logic of ultra-low-power MCUs (e.g., PIC16LF155x, SAM L21). Use Value: Enables >2-year battery life in sleep-dominated usage profiles; SOT-23 footprint minimizes board space in constrained form factors. |
| Medical Hearing Aids | Smart Cards & NFC Tags |
Use Scenario: Providing regulated power to miniature digital signal processors and MEMS microphones in Class I hearing aids. IC Role / Device Role / Timing Role: Single-output LDO powering analog front-end and DSP core with minimal thermal rise in sealed enclosures. Use Value: Low 250 nA IQ reduces self-heating and extends battery runtime between recharges; ±4% output tolerance meets audio ADC reference requirements. |
Use Scenario: Regulating power for contactless payment ICs and secure elements in ISO/IEC 14443-compliant smart cards. IC Role / Device Role / Timing Role: On-card voltage regulator converting field-induced RF energy or battery input to clean 1.8 V for secure crypto operations. Use Value: Stable 1.8 V output ensures reliable AES engine timing; 1.0 µF ceramic stability eliminates need for bulky capacitors in laminated card construction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B182MR-G | 150 mA, 1.8 V fixed, 250 nA IQ, but no shutdown pin - always-on operation. | Lacks enable/shutdown control; unsuitable for duty-cycled or energy-harvesting systems requiring deep sleep. | Select when system-level enable is handled externally or continuous operation is required; verify thermal performance at full load. |
| Ricoh RP111N181D-TR-F | 150 mA, 1.8 V fixed, 300 nA IQ, 100 nA shutdown - higher shutdown current than MCP1811BT-018/TT's 5 nA. | Higher shutdown leakage may reduce usable energy in multi-month energy harvesting intervals. | Prefer when cost is primary constraint and shutdown current >50 nA is acceptable; confirm PSRR meets RF-sensitive design needs. |
Compared with Torex XC6210B182MR-G and Ricoh RP111N181D-TR-F, the MCP1811BT-018/TT uniquely combines 5 nA shutdown current, integrated overcurrent protection, and guaranteed ceramic-capacitor stability - making it optimal for battery-constrained, intermittently powered systems where every nanoampere matters.
Availability
MCP1811BT-018/TT is available at Aetrix Electronics and suitable for energy harvesting systems, wearable electronics, and medical hearing aids requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for MCP1811BT-018/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 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 was designed specifically for ultra-low-power, long-life battery and energy-harvesting applications - prioritizing nanowatt quiescent operation, minimal external components, and robust performance across wide temperature and load ranges.
FAQ
What is the maximum input voltage rating for the MCP1811BT-018/TT?
The MCP1811BT-018/TT has an absolute maximum input voltage rating of +6.0 V. However, its specified operating input range is 1.8 V to 5.5 V. Exceeding 5.5 V may cause permanent damage or violate reliability specifications, even if below the absolute maximum limit.
Does the MCP1811BT-018/TT include output discharge functionality during shutdown?
No, the MCP1811BT-018/TT does not include output discharge. The "B" suffix in the part number identifies it as the MCP1811B variant, which omits the discharge transistor (DT) present in the "A" variant. When SHDN is pulled low, VOUT floats and retains charge until discharged through external load or leakage paths.
Can the MCP1811BT-018/TT operate with a 1.0 µF ceramic output capacitor?
Yes - the MCP1811BT-018/TT is explicitly characterized and guaranteed stable with a minimum 1.0 µF X7R ceramic output capacitor. This eliminates the need for larger, higher-ESR capacitors and simplifies layout in space-constrained designs.
What is the dropout voltage of the MCP1811BT-018/TT at full 150 mA load?
The typical dropout voltage of the MCP1811BT-018/TT is 400 mV at 150 mA load and +25°C. At maximum rated load and +85°C, dropout may reach up to 600 mV. This defines the minimum headroom required between VIN and VOUT to maintain regulation.
Is the MCP1811BT-018/TT compatible with lead-free reflow soldering processes?
Yes - the MCP1811BT-018/TT in SOT-23 package is RoHS-compliant and qualified for standard lead-free reflow profiles per JEDEC J-STD-020, including peak temperatures up to 260°C for 30 seconds.
MCP1811BT-018/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):
- 1.8V
- 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-018/TT FAQ
1.How can I place an order for MCP1811BT-018/TT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1811BT-018/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-018/TT reliable?
The price and inventory of MCP1811BT-018/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-018/TT is usually 5 days.
3.What payment methods are accepted for MCP1811BT-018/TT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1811BT-018/TT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1811BT-018/TT?
MCP1811BT-018/TT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1811BT-018/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-018/TT?
For technical support, including MCP1811BT-018/TT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1811BT-018/TT requirements.
6.How does Aetrix verify that MCP1811BT-018/TT is sourced from the original manufacturer or authorized distributors?
All MCP1811BT-018/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-018/TT meets industry standards.
7.What is the process for return or replacement of MCP1811BT-018/TT?
All MCP1811BT-018/TT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1811BT-018/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-018/TT part is unused and in its original packaging.
Return procedure for MCP1811BT-018/TT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP1811BT-018/TT Tags
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MIC5504-1.8YM5-TR
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MIC5365-3.3YD5-TR
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MIC5317-3.3YM5-TR
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TLV1117LV33DCYR
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