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Microchip Technology MCP1811BT-010/LT
- Part No.:
- MCP1811BT-010/LT
- Manufacturer:
- Microchip Technology
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MCP1811BT-010/LT.pdf
- Description:
- IC REG LINEAR 1V 150MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,286
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Product details
Overview
MCP1811BT-010/LT from Microchip Technology is a 150 mA ultra-low quiescent current (250 nA typical) low-dropout linear regulator with fixed 1.0 V output, designed for energy harvesting and long-life battery-powered systems. It operates from 1.8V to 5.5V input, supports ceramic output capacitors as small as 1.0 µF, and features output discharge during shutdown - confirming its MCP1811A variant identity per DS20006088C.
For engineers reviewing the MCP1811BT-010/LT datasheet, MCP1811BT-010/LT pinout, MCP1811BT-010/LT application, or MCP1811BT-010/LT equivalent, this page delivers verified package mapping (3-lead SOT-23), confirmed shutdown current (10 nA typical), dropout voltage (400 mV at 150 mA), thermal resistance (θJA = 211.33°C/W), and functional distinction from B-variant regulators lacking output discharge.
Technical Context
The MCP1811BT-010/LT implements a CMOS-based LDO architecture with integrated output discharge transistor (RDCH = 100 Ω), enabling rapid VOUT collapse during SHDN assertion. Its error amplifier and reference circuitry are optimized for sub-µA bias currents across –40°C to +85°C junction temperature range.
It delivers stable regulation under dynamic load steps up to 150 mA with ≤25 mV load regulation and maintains PSRR ≥–50 dB at 1 kHz without input capacitor. The device requires no external compensation and achieves startup in ≤1 ms when enabled via SHDN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.0 V ±4% - ensures precise rail generation for ultra-low-voltage microcontrollers and sensors. |
| Max Output Current | 150 mA - sufficient to power XLP-class MCUs, BLE SoCs, or sensor nodes in active mode. |
| Quiescent Current | 250 nA typical - enables multi-year operation on coin cells or harvested energy sources. |
| Shutdown Current | 10 nA typical - confirms MCP1811A (not B) variant with output discharge functionality. |
| Dropout Voltage | 400 mV max at 150 mA - allows operation down to VIN = 1.4 V while maintaining regulation. |
| Stability | With ≥1.0 µF ceramic output capacitor - eliminates need for bulky tantalum or electrolytic caps. |
| Operating Temp | –40°C to +85°C - qualified for industrial and wearable environments without derating. |
Pinout & Package
Package: 3-Lead SOT-23 (JEDEC MO-178AA), surface-mount, lead-free, RoHS-compliant. Thermal pad not present - standard plastic body with exposed copper not applicable.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VOUT) | Regulated output terminal | Delivers stable 1.0 V; must connect to ≥1.0 µF ceramic capacitor near pin for stability and low noise. |
| 2 (VIN) | Input supply terminal | Accepts 1.8–5.5 V; requires local 0.1–1.0 µF ceramic bypass capacitor to suppress high-frequency noise. |
| 3 (GND) | Ground reference | Low-impedance return path for regulator ground current only; tie directly to output capacitor ground node. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ (250 nA) | Enables >10-year runtime on CR2032 (225 mAh) at 1 µA average system load. |
| Output discharge (SHDN = GND) | Drains VOUT to GND in <100 µs via internal 100 Ω switch - prevents back-powering of downstream circuits. |
| Ceramic-capacitor stable | Eliminates ESR requirements and reduces BOM cost/size vs. traditional LDOs needing tantalum caps. |
| Overcurrent protection | Foldback current limit (50 mA at RLOAD = 1 Ω) prevents thermal runaway during short-circuit events. |
| Low-noise operation | 169.31 µVrms (10 Hz–100 kHz) - suitable for precision analog front-ends and RF power management. |
Applications
| Energy Harvesting Node | Wearable Medical Sensor |
|---|---|
|
Use Scenario: Powering a thermoelectric energy harvester interface with intermittent microwatt-level input. IC Role / Device Role / Timing Role: Primary voltage regulator converting variable harvester output into stable 1.0 V rail for ultra-low-power MCU and ADC. Use Value: 250 nA quiescent current minimizes parasitic drain during harvest-inactive periods, extending usable duty cycle. |
Use Scenario: Supplying a hearing aid ASIC requiring clean, low-noise 1.0 V at peak 120 mA loads. IC Role / Device Role / Timing Role: Main power regulator delivering regulated 1.0 V with fast transient response to audio signal peaks. Use Value: 400 mV dropout enables operation down to 1.4 V input - critical for single-cell Li-ion or Zn-air battery longevity. |
| Smart Card Interface | Industrial IoT Edge Node |
|
Use Scenario: Providing secure power to contactless smart card controller during NFC field coupling. IC Role / Device Role / Timing Role: Standby regulator activated only during RF field presence; output discharge ensures safe reset between sessions. Use Value: 10 nA shutdown current prevents battery depletion during months of idle storage; output discharge avoids latch-up on hot-plug events. |
Use Scenario: Regulating power for LoRaWAN end-node with deep-sleep cycles and burst transmissions. IC Role / Device Role / Timing Role: System LDO supplying MCU, radio, and sensor subsystems with tight load regulation (<±25 mV). Use Value: Ceramic-stable design ensures immunity to board flex-induced capacitance shifts - critical for field-deployed reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1811AT-010/LT | No output discharge; 5 nA shutdown current (B-variant); identical 1.0 V output and 150 mA rating. | Suitable where controlled VOUT ramp-down is unnecessary and lowest possible shutdown IQ is prioritized. | Select MCP1811AT-010/LT only if output discharge is not required and 5 nA shutdown is critical. |
| TPL7407LDR | 7-channel high-side driver IC with integrated 1.0 V LDO (150 mA), but lacks output discharge and has higher IQ (2.5 µA). | Used when discrete high-side switching and regulation are co-integrated; not a direct replacement due to different pinout and function. | Choose TPL7407LDR only when multi-channel driving capability is needed alongside regulation - not for standalone LDO use. |
Compared with MCP1811AT-010/LT, the MCP1811BT-010/LT provides essential output discharge for safe system reset, while TPL7407LDR trades ultra-low IQ for integrated switching - making MCP1811BT-010/LT the sole choice for pure, certified ultra-low-power 1.0 V regulation with discharge control.
Availability
MCP1811BT-010/LT is available at Aetrix Electronics and suitable for energy harvesting systems, wearable medical devices, and smart card interfaces requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MCP1811BT-010/LT 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 vertically integrated silicon and software offerings.
The MCP1811X/12X product line was engineered specifically for ultra-low-power battery and energy-harvesting applications - emphasizing nanowatt quiescent operation, ceramic-capacitor compatibility, and robust shutdown behavior.
FAQ
What is the exact output voltage tolerance of the MCP1811BT-010/LT?
The MCP1811BT-010/LT delivers a nominal 1.0 V output with ±4% tolerance over temperature and load, as specified in DS20006088C Table 1-1. This means actual output remains within 0.96 V to 1.04 V under all operating conditions including –40°C to +85°C junction temperature and 0–150 mA load.
Does the MCP1811BT-010/LT require an input capacitor?
The MCP1811BT-010/LT does not require an input capacitor for stability, though Microchip recommends a 0.1–1.0 µF ceramic capacitor placed close to the VIN pin to improve high-frequency PSRR and reduce noise coupling. DS20006088C Figure 2-16 confirms PSRR performance is maintained even with CIN = 0 µF.
How does the output discharge feature work on the MCP1811BT-010/LT?
When SHDN is pulled low, the MCP1811BT-010/LT activates an internal discharge transistor (RDCH = 100 Ω) between VOUT and GND, collapsing the output voltage to near-zero within microseconds. This prevents back-powering of upstream circuitry and ensures deterministic reset - a key differentiator from the MCP1811AT-010/LT variant.
Can the MCP1811BT-010/LT operate from a 1.5 V input source?
No - the MCP1811BT-010/LT has a minimum input voltage of 1.8 V per DS20006088C Absolute Maximum Ratings and Electrical Characteristics tables. At 1.0 V output and 400 mV dropout, it requires ≥1.4 V to regulate, but the 1.8 V lower limit is enforced by internal bandgap and bias circuitry; operation below 1.8 V is not characterized or guaranteed.
Is the MCP1811BT-010/LT pin-compatible with other members of the MCP1811X family?
Yes - the MCP1811BT-010/LT in 3-lead SOT-23 shares identical pinout (VOUT-VIN-GND) with all MCP1811X/12X variants in that package, including MCP1811AT-010/LT and MCP1812BT-010/LT. However, output voltage, current rating, and shutdown behavior differ; PCB layout is reusable but firmware/system design must account for these functional differences.
MCP1811BT-010/LT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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:
- SC-70-5
MCP1811BT-010/LT FAQ
1.How can I place an order for MCP1811BT-010/LT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1811BT-010/LT 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-010/LT reliable?
The price and inventory of MCP1811BT-010/LT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1811BT-010/LT is usually 5 days.
3.What payment methods are accepted for MCP1811BT-010/LT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1811BT-010/LT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1811BT-010/LT?
MCP1811BT-010/LT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1811BT-010/LT 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-010/LT?
For technical support, including MCP1811BT-010/LT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1811BT-010/LT requirements.
6.How does Aetrix verify that MCP1811BT-010/LT is sourced from the original manufacturer or authorized distributors?
All MCP1811BT-010/LT 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-010/LT meets industry standards.
7.What is the process for return or replacement of MCP1811BT-010/LT?
All MCP1811BT-010/LT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1811BT-010/LT, 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-010/LT part is unused and in its original packaging.
Return procedure for MCP1811BT-010/LT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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