My Inquiry
My Account
Microchip Technology MCP1811BT-030/TT
- Part No.:
- MCP1811BT-030/TT
- Manufacturer:
- Microchip Technology
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MCP1811BT-030/TT.pdf
- Description:
- IC REG LINEAR 3V 150MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,377
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MCP1811BT-030/TT from Microchip Technology is a 150 mA ultra-low-quiescent-current LDO regulator with fixed 3.0 V output, 250 nA typical operating current, and 5 nA typical shutdown current (MCP1811B variant). It operates from 1.8 V to 5.5 V input, supports ceramic output capacitors as low as 1.0 µF, and delivers stable voltage for battery-constrained systems such as hearing aids and smart wearables.
For engineers reviewing the MCP1811BT-030/TT datasheet, MCP1811BT-030/TT pinout, MCP1811BT-030/TT application, or MCP1811BT-030/TT equivalent, key selection criteria include ultra-low IQ performance, 3.0 V fixed output accuracy (±4%), shutdown leakage <125 nA, and compatibility with 3-lead SOT-23 packaging for space-constrained PCB layouts.
Technical Context
The MCP1811BT-030/TT implements a P-channel MOSFET pass element enabling ultra-low dropout voltage (400 mV at 150 mA) and minimal ground current (90–110 µA across load). Its internal error amplifier and reference are optimized for stability with low-ESR ceramic capacitors, eliminating need for tantalum or aluminum electrolytics.
As an MCP1811B-series device, it omits output discharge functionality (unlike MCP1811A), reducing complexity in applications where controlled VOUT ramp-down during shutdown is not required-e.g., systems using external power sequencing or always-on backup rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0 V ±4% - ensures compatible biasing for 3.3 V I/O logic with margin for voltage drop and temperature drift. |
| Quiescent Current | 250 nA typical - enables multi-year operation on coin cells in sleep-mode sensor nodes. |
| Shutdown Current | 5 nA typical - critical for energy harvesting systems requiring near-zero standby drain. |
| Max Output Current | 150 mA - sufficient to power microcontrollers (e.g., PIC XLP), BLE radios, and analog front-ends simultaneously. |
| Input Voltage Range | 1.8 V to 5.5 V - supports single-cell Li-ion, two-cell alkaline, or USB-supplied systems without external pre-regulation. |
| Dropout Voltage | 400 mV at 150 mA - allows regulation down to ~3.4 V input when delivering full load at 3.0 V output. |
| Stability Capacitor | 1.0 µF ceramic (X7R) - reduces BOM cost and board area vs. larger electrolytic solutions; enables compact wearable designs. |
Pinout & Package
Package: 3-Lead SOT-23 - surface-mount, 2.92 mm × 1.3 mm footprint, JEDEC MO-178AA compliant, suitable for automated assembly and high-density layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VOUT | Regulated output terminal | Delivers stable 3.0 V to load; requires 1.0 µF ceramic capacitor to GND for stability and noise suppression. |
| VIN | Input supply terminal | Accepts 1.8–5.5 V unregulated input; must be decoupled with ≥0.1 µF ceramic capacitor close to pin. |
| GND | Ground reference | Low-impedance return path for load and regulator ground current; tie directly to quiet ground plane or output capacitor cathode. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ operation | 250 nA typical quiescent current extends battery life in intermittent-sensing applications beyond 10 years on CR2032. |
| No output discharge | Omits internal discharge transistor (MCP1811B variant), simplifying shutdown behavior and reducing leakage paths in always-on subsystems. |
| Ceramic-capacitor stability | Stable with 1.0 µF X7R ceramic output capacitor - eliminates ESR requirements and enables smaller, more reliable designs. |
| Overcurrent protection | Foldback current limit (50 mA at RLOAD = 1 Ω) prevents thermal runaway during short-circuit events without latch-up. |
| Wide temperature range | Specified from –40°C to +85°C junction - validated for medical wearables and industrial sensor deployments. |
Applications
| Energy Harvesting Nodes | Smart Hearing Aids |
|---|---|
Use Scenario: Powering wireless sensor transmitters powered by piezoelectric or thermoelectric harvesters with µW-level average output. IC Role / Device Role / Timing Role: Primary voltage regulator converting variable harvester output to stable 3.0 V rail for ultra-low-power MCU and RF transceiver. Use Value: 5 nA shutdown current prevents harvester energy loss during idle periods; 250 nA IQ enables usable duty cycles even with sub-µW harvesters. | Use Scenario: Supplying digital signal processor, MEMS microphone, and Class-D receiver in miniaturized in-the-ear hearing instruments. IC Role / Device Role / Timing Role: Main power source for all active circuitry from a single Zn-air button cell (1.4 V nominal). Use Value: 1.8 V minimum input enables regulation down to end-of-life battery voltage; 150 mA output supports burst-mode DSP processing without brownout. |
| Long-Life IoT Sensors | Medical Wearable Monitors |
Use Scenario: Battery-powered environmental sensors deployed in remote locations for >5-year maintenance-free operation. IC Role / Device Role / Timing Role: Regulator for microcontroller, temperature/humidity sensor, and LoRaWAN transceiver in periodic wake-up architecture. Use Value: 250 nA IQ dominates system sleep current, making battery capacity the primary lifetime determinant-not regulator inefficiency. | Use Scenario: Continuous glucose monitor (CGM) patch worn for 7–14 days, requiring precise analog front-end and Bluetooth LE radio operation. IC Role / Device Role / Timing Role: Precision 3.0 V supply for ADC reference, op-amps, and BLE SoC with tight voltage tolerance requirements. Use Value: ±4% output accuracy over temperature and load ensures consistent sensor calibration and RF transmit power without software compensation. |
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/TT | Same 3.0 V output, but 1.6 µA typical IQ (6.4× higher than MCP1811BT-030/TT); no shutdown pin. | Lacks enable/shutdown control; unsuitable for systems requiring deep-sleep current optimization. | Select when cost sensitivity outweighs ultra-low-IQ requirement and shutdown functionality is unnecessary. |
| TNIV03003001000 | 3.0 V, 200 nA IQ (lower), but only 50 mA output current and no shutdown mode. | Insufficient current for BLE+MCU loads; no SHDN pin limits power sequencing flexibility. | Choose only for sub-50 mA applications where absolute lowest IQ is mandatory and enable control is omitted. |
Compared with MCP1700T-3002E/TT and TNIV03003001000, the MCP1811BT-030/TT uniquely balances 150 mA output capability, 5 nA shutdown, and 250 nA operating IQ in a 3-lead SOT-23 package-making it optimal for compact, long-life, and controllably powered systems.
Availability
MCP1811BT-030/TT is available at Aetrix Electronics and suitable for energy harvesting nodes, smart hearing aids, and long-life IoT sensors requiring stable component supply with guaranteed longevity and traceable sourcing.
Supply support for MCP1811BT-030/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 is a leading provider of microcontrollers, analog devices, and timing solutions, with core expertise in low-power semiconductor design and embedded control.
The MCP1811 family was designed specifically for ultra-long-life battery-powered applications demanding nanowatt-level quiescent current, including medical wearables, energy harvesting, and green electronics.
FAQ
What is the maximum output current capability of the MCP1811BT-030/TT?
The MCP1811BT-030/TT delivers up to 150 mA of continuous output current. This rating is validated across the full operating temperature range (–40°C to +85°C) and supports peak loads from microcontrollers, sensors, and low-power radios without dropout or thermal shutdown under typical PCB layout conditions.
Does the MCP1811BT-030/TT include an output discharge function during shutdown?
No, the MCP1811BT-030/TT does not include output discharge. As an MCP1811B-series device, it omits the internal discharge transistor present in MCP1811A variants. When SHDN is pulled low, VOUT floats and discharges only through the load and output capacitor's natural leakage.
What is the minimum input voltage required for the MCP1811BT-030/TT to maintain regulation at full load?
At 150 mA output current, the MCP1811BT-030/TT requires a minimum input voltage of 3.4 V to maintain 3.0 V output within specification, based on its 400 mV typical dropout voltage. Input voltage must remain ≥ VIN(MIN) = VR + VDROPOUT(MAX) = 3.0 V + 0.6 V = 3.6 V for guaranteed performance across temperature and process variation.
Which output capacitor value and type are required for stability with the MCP1811BT-030/TT?
The MCP1811BT-030/TT is stable with a minimum 1.0 µF X7R ceramic capacitor placed between VOUT and GND. This value satisfies phase margin requirements across all operating conditions; larger values improve transient response but are not required for stability.
How does the shutdown input (SHDN) interface electrically with the MCP1811BT-030/TT?
The SHDN pin is CMOS-compatible: logic high (>70% VIN) enables regulation; logic low (<20% VIN) places the device in shutdown mode drawing ≤125 nA. No external pull-up is mandatory, but a 1 MΩ resistor to VIN is recommended per datasheet for robust noise immunity in noisy environments.
MCP1811BT-030/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):
- 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:
- SOT-23-3
MCP1811BT-030/TT FAQ
1.How can I place an order for MCP1811BT-030/TT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1811BT-030/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-030/TT reliable?
The price and inventory of MCP1811BT-030/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-030/TT is usually 5 days.
3.What payment methods are accepted for MCP1811BT-030/TT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1811BT-030/TT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1811BT-030/TT?
MCP1811BT-030/TT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1811BT-030/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-030/TT?
For technical support, including MCP1811BT-030/TT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1811BT-030/TT requirements.
6.How does Aetrix verify that MCP1811BT-030/TT is sourced from the original manufacturer or authorized distributors?
All MCP1811BT-030/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-030/TT meets industry standards.
7.What is the process for return or replacement of MCP1811BT-030/TT?
All MCP1811BT-030/TT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1811BT-030/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-030/TT part is unused and in its original packaging.
Return procedure for MCP1811BT-030/TT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP1811BT-030/TT 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…
