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Microchip Technology MCP1811BT-040/LT
- Part No.:
- MCP1811BT-040/LT
- Manufacturer:
- Microchip Technology
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MCP1811BT-040/LT.pdf
- Description:
- IC REG LINEAR 4V 150MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,690
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Product details
Overview
MCP1811BT-040/LT from Microchip Technology is a 150 mA ultra-low-quiescent-current LDO regulator with fixed 4.0 V output, 250 nA typical IQ, and shutdown capability (5 nA typical ISHDN). It operates from 1.8V to 5.5V input and is stable with a 1.0 µF ceramic output capacitor. Designed for energy harvesting and long-life battery-powered systems such as hearing aids and smart wearables.
For engineers reviewing the MCP1811BT-040/LT datasheet, MCP1811BT-040/LT pinout, MCP1811BT-040/LT application, or MCP1811BT-040/LT equivalent, key selection criteria include ultra-low shutdown current, 4.0 V fixed output accuracy (±4%), dropout voltage at full load (≤600 mV), thermal performance in UDFN package, and compatibility with micro-power MCU subsystems.
Technical Context
The MCP1811BT-040/LT belongs to the MCP1811B variant-no output discharge function, optimized for lowest shutdown current (5 nA typ). Its internal error amplifier and PMOS pass device enable stable regulation across –40°C to +85°C junction temperature with minimal line/load regulation drift.
It uses a low-noise bandgap reference and supports dynamic load steps up to 150 mA with <100 µs recovery. The device requires no external compensation and achieves >50 dB PSRR at 1 kHz with zero input capacitor, making it suitable for noise-sensitive analog and RF supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.0 V ±4% - ensures precise biasing for 3.3 V/4.0 V logic interfaces and analog sensors without external feedback. |
| Quiescent Current | 250 nA typical - enables multi-year operation on coin cells in sleep-mode IoT endpoints. |
| Shutdown Current | 5 nA typical - minimizes leakage during deep-sleep states in wearable medical devices. |
| Max Output Current | 150 mA - sufficient to power ultra-low-power MCUs (e.g., PIC XLP), BLE radios, and sensor signal chains simultaneously. |
| Dropout Voltage | 600 mV max at 150 mA - allows operation down to 4.6 V input while maintaining regulated 4.0 V output. |
| Stability | Stable with 1.0 µF X7R ceramic COUT - reduces BOM count, PCB area, and cost vs. tantalum or aluminum electrolytic solutions. |
| Operating Temp | –40°C to +85°C junction - qualified for industrial and medical-grade portable equipment environments. |
Pinout & Package
Package: 4-Lead 1 × 1 mm UDFN with exposed thermal pad (EP) - provides low θJA = 91.05°C/W on JEDEC 4-layer board, enabling high power efficiency in space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input voltage supply | Accepts 1.8–5.5 V; must be decoupled locally to suppress noise coupling into regulated output. |
| SHDN | Active-high enable control | Pulled high (>70% VIN) to enable; driven low to enter 5 nA shutdown mode; 0.1 nA leakage preserves battery life. |
| VOUT | Regulated output | Delivers stable 4.0 V ±4%; requires ≥1.0 µF ceramic capacitor placed adjacent to pin for stability and transient response. |
| GND | Ground reference | Low-impedance return path for load and quiescent current; tie directly to output capacitor ground for optimal PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ (250 nA) | Extends shelf life and operational runtime of primary-cell-powered devices beyond 10 years in duty-cycled applications. |
| No output discharge (MCP1811B) | Prevents unintended discharge of downstream capacitors during shutdown-critical for preserving state in backup power domains. |
| 1.0 µF ceramic stability | Eliminates need for large, aging-prone electrolytics; enables miniaturized, high-reliability power stages in wearables. |
| Overcurrent protection | Current-limit foldback (50 mA typical) protects against short circuits without latch-up, supporting robust field deployment. |
| High PSRR (–50 dB @ 1 kHz) | Rejects switching noise from DC-DC converters or digital ICs, enabling clean analog supply rails without additional filtering. |
Applications
| Energy Harvesting Systems | Long-Life Medical Devices |
|---|---|
|
Use Scenario: Powering wireless sensor nodes powered by thermoelectric or piezoelectric harvesters delivering µW–mW average power. IC Role / Device Role / Timing Role: Primary voltage regulator converting variable harvester output to stable 4.0 V rail for MCU and radio. Use Value: 250 nA IQ enables startup from sub-10 µA sources; 1.0 µF ceramic support simplifies integration with ultra-small form-factor harvesters. |
Use Scenario: Hearing aids requiring multi-year battery life from zinc-air cells under intermittent audio processing loads. IC Role / Device Role / Timing Role: Main supply regulator for DSP, MEMS microphone, and Class-D receiver amplifier. Use Value: 5 nA shutdown current prevents battery drain during storage; ±4% output tolerance ensures consistent audio gain calibration. |
| Smart Wearable Electronics | Ultra-Low-Power Industrial Sensors |
|
Use Scenario: Smart wristbands monitoring heart rate and motion using optical PPG and inertial sensors. IC Role / Device Role / Timing Role: Regulated 4.0 V source for analog front-end and low-voltage MCU core. Use Value: Low dropout (≤600 mV) sustains regulation as battery discharges from 4.2 V to 3.0 V; small UDFN footprint saves PCB area. |
Use Scenario: Wireless temperature/humidity nodes deployed in remote infrastructure with 10+ year maintenance cycles. IC Role / Device Role / Timing Role: Power management IC supplying precision ADC, EEPROM, and LoRa transceiver. Use Value: –40°C to +85°C operation ensures reliability in uncontrolled environments; high PSRR prevents measurement errors from RF interference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B402MR-G | 4.0 V fixed output, 250 nA IQ, SOT-25 package (5-pin), includes output discharge. | Output discharge may conflict with systems requiring hold-up voltage retention during shutdown. | Select when fast VOUT ramp-down is required; verify GND routing compatibility with 5-pin layout. |
| Ricoh RP114K401D-TR-F | 4.0 V fixed output, 300 nA IQ, DFN1006-4 package, no output discharge, 150 mA rating. | Slightly higher IQ and different thermal resistance (θJA = 120°C/W); lower max input voltage (5.0 V). | Choose for cost-sensitive volume production where 5.0 V max VIN suffices and thermal margin permits. |
Compared with MCP1811BT-040/LT, the XC6210B402MR-G adds output discharge but requires PCB redesign for 5-pin SOT-25, while the RP114K401D-TR-F trades 50 nA higher IQ and reduced input range for broader distributor availability and lower unit cost in high-volume deployments.
Availability
MCP1811BT-040/LT is available at Aetrix Electronics and suitable for energy harvesting systems, long-life medical devices, and smart wearable electronics requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MCP1811BT-040/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 is a leading provider of microcontroller, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets since 1989.
The MCP1811 family targets ultra-low-power system design-specifically engineered to extend battery life in always-on, intermittently active edge devices where every nanoamp counts.
FAQ
What is the maximum input voltage rating for the MCP1811BT-040/LT?
The MCP1811BT-040/LT has an absolute maximum input voltage 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 parametric guarantees per DS20006088C-page 4 Absolute Maximum Ratings table.
Does the MCP1811BT-040/LT include output discharge functionality?
No, the MCP1811BT-040/LT is part of the MCP1811B variant, which omits the output discharge transistor. This means VOUT remains floating after shutdown-critical for preserving charge in backup capacitors or retaining state in downstream circuitry.
What output capacitor value is required for stability with the MCP1811BT-040/LT?
A minimum 1.0 µF X7R ceramic capacitor is required at VOUT for stability. Microchip validates this value across temperature and load conditions; smaller values risk oscillation, while larger values improve transient response without compromising stability.
Can the MCP1811BT-040/LT operate from a single alkaline cell?
Yes-the MCP1811BT-040/LT supports input voltages as low as 1.8 V. When paired with a fresh alkaline cell (~1.6 V nominal), it cannot regulate 4.0 V; however, it functions reliably with two series alkaline cells (3.2 V initial), delivering full 150 mA output down to ~4.6 V input (i.e., 2.3 V/cell).
What is the thermal resistance (θJA) of the MCP1811BT-040/LT in its UDFN package?
The MCP1811BT-040/LT in the 4-lead 1 × 1 mm UDFN package has a measured θJA of 91.05°C/W on a JEDEC-standard 4-layer FR4 board with 1 oz. copper and thermal vias. This enables continuous 150 mA operation at ambient temperatures up to +70°C without derating.
MCP1811BT-040/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):
- 4V
- 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-040/LT FAQ
1.How can I place an order for MCP1811BT-040/LT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1811BT-040/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-040/LT reliable?
The price and inventory of MCP1811BT-040/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-040/LT is usually 5 days.
3.What payment methods are accepted for MCP1811BT-040/LT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1811BT-040/LT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1811BT-040/LT?
MCP1811BT-040/LT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1811BT-040/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-040/LT?
For technical support, including MCP1811BT-040/LT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1811BT-040/LT requirements.
6.How does Aetrix verify that MCP1811BT-040/LT is sourced from the original manufacturer or authorized distributors?
All MCP1811BT-040/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-040/LT meets industry standards.
7.What is the process for return or replacement of MCP1811BT-040/LT?
All MCP1811BT-040/LT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1811BT-040/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-040/LT part is unused and in its original packaging.
Return procedure for MCP1811BT-040/LT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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