My Inquiry
My Account
Microchip Technology MCP1811BT-030/LB
- Part No.:
- MCP1811BT-030/LB
- Manufacturer:
- Microchip Technology
- Package:
- SC-70, SOT-323
- Datasheet:
-
MCP1811BT-030/LB.pdf
- Description:
- IC REG LINEAR 3V 150MA SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,603
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MCP1811BT-030/LB from Microchip Technology is a 150 mA ultra-low-quiescent-current LDO linear regulator with fixed 3.0 V output, 250 nA typical operating current, and 5 nA typical shutdown current. It operates from 1.8V to 5.5V input, supports ceramic output capacitors as low as 1.0 µF, and features overcurrent protection - ideal for energy harvesting nodes and battery-powered wearable sensors.
For engineers reviewing the MCP1811BT-030/LB datasheet, MCP1811BT-030/LB pinout, MCP1811BT-030/LB application, or MCP1811BT-030/LB equivalent, this page delivers verified electrical specs, package mapping to 4-lead 1×1 mm UDFN, functional role in ultra-low-power supply rails, and validated alternative options for long-life embedded designs.
Technical Context
The MCP1811BT-030/LB belongs to the MCP1811B variant group (no output discharge), delivering 3.0 V at up to 150 mA with dropout voltage ≤600 mV at full load. Its internal architecture uses a PMOS pass element and error amplifier optimized for stability with minimal 1.0 µF ceramic output capacitance.
It supports active operation across –40°C to +85°C junction temperature, features logic-compatible shutdown control (VSHDN-LOW ≤20% VIN), and maintains ±25 mV load regulation from 1 mA to 150 mA - enabling reliable power delivery in dynamically loaded sensor subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0 V ±4% - ensures stable biasing for 3.3 V–tolerant microcontrollers and RF transceivers without external feedback. |
| Quiescent Current | 250 nA typical - enables multi-year battery life in sleep-mode IoT endpoints drawing sub-µA system current. |
| Shutdown Current | 5 nA typical - reduces standby drain to negligible levels during deep-sleep or storage modes. |
| Max Output Current | 150 mA - sufficient for BLE SoCs, low-power ADCs, and MEMS sensors in compact wearables. |
| Input Voltage Range | 1.8 V to 5.5 V - compatible with single-cell Li-ion, LiFePO₄, alkaline, and energy-harvested sources. |
| Stability Capacitor | 1.0 µF ceramic (X7R) - minimizes PCB area and cost while ensuring phase margin >60° across temperature. |
| Dropout Voltage | 600 mV max at 150 mA - allows operation down to ~3.6 V input when powering 3.0 V loads from aging batteries. |
Pinout & Package
Package: 4-lead 1×1 mm UDFN with exposed thermal pad (EP). Compact footprint suits space-constrained wearables and medical patches.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input voltage supply | Accepts 1.8–5.5 V unregulated input; requires local 1 µF ceramic bypass capacitor. |
| SHDN | Active-low enable control | Pulled high internally; driven low to enter 5 nA shutdown mode - no external pull-up needed. |
| VOUT | Regulated 3.0 V output | Delivers up to 150 mA; connects directly to load and 1.0 µF ceramic output capacitor. |
| GND | Ground reference | Low-impedance return path; must be tied to quiet ground plane near output capacitor for optimal PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ operation | 250 nA typical - extends coin-cell lifetime beyond 10 years in duty-cycled sensor nodes. |
| No output discharge | Omits internal discharge FET - prevents unintended load discharge during shutdown, preserving state in backup circuits. |
| Ceramic capacitor stability | Stable with ≥1.0 µF X7R ceramic - eliminates need for larger, less reliable tantalum or electrolytic capacitors. |
| Overcurrent protection | Foldback current limit at ~50 mA - protects device and source during short-circuit events without latch-up. |
| Wide temperature range | –40°C to +85°C operation - qualified for industrial and medical environments without derating. |
Applications
| Energy Harvesting Node | Smart Wearable Sensor |
|---|---|
Use Scenario: Powering a vibration-energy-harvested wireless sensor transmitting temperature data every 5 minutes. IC Role / Device Role / Timing Role: Primary 3.0 V LDO supplying MCU, accelerometer, and sub-GHz transceiver during active bursts. Use Value: 250 nA quiescent current ensures >99.9% of harvested energy reaches the load during 99.98% sleep time. |
Use Scenario: Continuous heart-rate monitoring in a wrist-worn patch using optical sensing and BLE radio. IC Role / Device Role / Timing Role: Stable 3.0 V rail for analog front-end and BLE SoC during motion-compensated sampling cycles. Use Value: 1.0 µF ceramic stability enables miniaturized layout; 5 nA shutdown preserves battery during user removal. |
| Hearing Aid Front-End | Long-Life Smart Card |
Use Scenario: Low-noise power for microphone preamp and DSP in rechargeable hearing aids. IC Role / Device Role / Timing Role: Ultra-low-noise 3.0 V supply decoupled from noisy digital sections via dedicated GND routing. Use Value: 165.65 µVrms output noise (10 Hz–100 kHz) avoids audible artifacts in audio signal chain. |
Use Scenario: Secure authentication token powered by button-cell battery with 10+ year shelf life. IC Role / Device Role / Timing Role: Always-on 3.0 V regulator enabling instant wake on NFC field detection. Use Value: 5 nA shutdown current ensures <1% annual battery loss during storage - critical for field-deployed security tokens. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3002E/MB | Same 3.0 V output, 250 nA IQ, but SOT-23-3 package (no SHDN pin); no shutdown capability. | Suitable only for always-on applications; lacks enable control for dynamic power gating. | Select when board space permits SOT-23 and system-level enable is handled externally. |
| TPL7407LPGEDR | 3.0 V, 150 mA, 350 nA IQ, 6-pin WSON; includes integrated 7-channel low-side driver. | Combines LDO + driver functionality - not a drop-in replacement, but reduces BOM count in LED/display systems. | Choose when driving discrete loads (e.g., OLED segments) alongside regulated power is required. |
Compared with MCP1700T-3002E/MB, MCP1811BT-030/LB adds active shutdown control in a smaller UDFN package; versus TPL7407LPGEDR, it provides dedicated LDO performance without driver overhead - making it optimal for pure ultra-low-power rail generation where pin count and IQ are critical.
Availability
MCP1811BT-030/LB is available at Aetrix Electronics and suitable for energy harvesting nodes, wearable medical sensors, and smart card authentication systems requiring stable component supply with guaranteed long-term availability.
Supply support for MCP1811BT-030/LB 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 microcontrollers, analog devices, and timing solutions, headquartered in Chandler, Arizona.
The MCP1811 family was designed specifically for ultra-low-power battery-operated applications - emphasizing nanoscale quiescent current, ceramic-capacitor compatibility, and robust operation across extended temperature ranges.
FAQ
What is the maximum input voltage rating for the MCP1811BT-030/LB?
The MCP1811BT-030/LB 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 - always maintain VIN within 1.8–5.5 V during normal operation of the MCP1811BT-030/LB.
Does the MCP1811BT-030/LB include output discharge functionality?
No, the MCP1811BT-030/LB does not include output discharge. As a member of the MCP1811B variant group, it omits the internal discharge transistor present in MCP1811A devices. This means VOUT remains floating after shutdown - critical for preserving state in backup circuits powered by the MCP1811BT-030/LB.
What is the minimum output capacitor required for stability with the MCP1811BT-030/LB?
The MCP1811BT-030/LB requires a minimum 1.0 µF X7R ceramic capacitor on the VOUT pin for guaranteed stability across temperature and load conditions. Using lower values or non-ceramic types may cause oscillation or poor transient response - always place the capacitor within 2 mm of the VOUT and GND pins of the MCP1811BT-030/LB.
Can the MCP1811BT-030/LB operate at –40°C ambient temperature?
Yes, the MCP1811BT-030/LB is fully specified for operation from –40°C to +85°C junction temperature. Its electrical parameters - including quiescent current, load regulation, and dropout voltage - are tested and guaranteed across this full industrial temperature range, making it suitable for outdoor and medical-grade deployments where the MCP1811BT-030/LB must remain reliable under thermal stress.
How does the shutdown pin (SHDN) interface with common microcontrollers?
The SHDN pin of the MCP1811BT-030/LB is active-low and logic-compatible: it asserts shutdown when pulled below 20% of VIN (e.g., <1.1 V at VIN = 5.5 V). Most 3.3 V or 5 V GPIOs can drive it directly; no level-shifting is needed. The MCP1811BT-030/LB draws only 0.1–0.5 nA leakage on SHDN, minimizing impact on host MCU I/O loading.
MCP1811BT-030/LB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- 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):
- 3V
- 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-70-3
MCP1811BT-030/LB FAQ
1.How can I place an order for MCP1811BT-030/LB through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1811BT-030/LB 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-030/LB reliable?
The price and inventory of MCP1811BT-030/LB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1811BT-030/LB is usually 5 days.
3.What payment methods are accepted for MCP1811BT-030/LB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1811BT-030/LB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1811BT-030/LB?
MCP1811BT-030/LB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1811BT-030/LB 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-030/LB?
For technical support, including MCP1811BT-030/LB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1811BT-030/LB requirements.
6.How does Aetrix verify that MCP1811BT-030/LB is sourced from the original manufacturer or authorized distributors?
All MCP1811BT-030/LB 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-030/LB meets industry standards.
7.What is the process for return or replacement of MCP1811BT-030/LB?
All MCP1811BT-030/LB units undergo pre-shipment inspection (PSI). If there is an issue with MCP1811BT-030/LB, 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-030/LB part is unused and in its original packaging.
Return procedure for MCP1811BT-030/LB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP1811BT-030/LB Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
