My Inquiry
My Account
Microchip Technology MCP1811AT-030/OT
- Part No.:
- MCP1811AT-030/OT
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MCP1811AT-030/OT.pdf
- Description:
- IC REG LINEAR 3V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,804
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MCP1811AT-030/OT from Microchip Technology is an ultra-low quiescent current (250 nA typical) 150 mA low-dropout linear regulator with fixed 3.0 V output, 1.8–5.5 V input range, and output discharge functionality - designed for energy harvesting and long-life battery-powered systems such as hearing aids and smart wearables.
For engineers reviewing the MCP1811AT-030/OT datasheet, MCP1811AT-030/OT pinout, MCP1811AT-030/OT application, or MCP1811AT-030/OT equivalent, key selection criteria include shutdown current (10 nA typical), dropout voltage (400 mV at 150 mA), ceramic capacitor stability (1.0 µF min), and SOT-23-3 package compatibility in ultra-low-power sensor nodes and medical microsystems.
Technical Context
The MCP1811AT-030/OT implements a PMOS pass transistor architecture enabling ultra-low IQ operation while maintaining tight output regulation (±4% over load/temperature). Its integrated discharge transistor actively pulls VOUT to GND during shutdown (SHDN = GND), eliminating residual voltage hold-up in power-gated subsystems.
It operates across –40°C to +85°C junction temperature, supports dynamic load steps up to 150 mA with <100 mV transient deviation, and achieves –50 dB PSRR at 1 kHz without input capacitance - making it suitable for noise-sensitive analog front-ends powered from harvested or coin-cell sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0 V ±4% - ensures stable supply for 3.3 V-tolerant MCUs and sensors without external feedback network |
| Quiescent Current | 250 nA typical - enables multi-year operation on 100 mAh coin cells in sleep-dominated duty cycles |
| Shutdown Current | 10 nA typical - reduces system standby loss to sub-nW levels when paired with ultra-low-leakage controllers |
| Max Output Current | 150 mA - sufficient for intermittent RF transmission bursts or sensor acquisition in wearable edge nodes |
| Dropout Voltage | 400 mV at 150 mA - allows regulation down to 3.4 V input, extending usable battery voltage range |
| Stability | 1.0 µF ceramic output capacitor - eliminates bulk tantalum, reduces board area and cost vs. traditional LDOs |
| PSRR | –50 dB @ 1 kHz (no CIN) - suppresses switching noise from adjacent DC/DC converters without input filtering |
Pinout & Package
Package: 3-Lead SOT-23 (JEDEC MO-178AA), 2.92 mm × 1.3 mm × 1.0 mm, thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input voltage supply | Accepts 1.8–5.5 V; must be decoupled locally to minimize PSRR degradation and startup overshoot |
| VOUT | Regulated output | Delivers fixed 3.0 V; requires ≥1.0 µF X7R ceramic capacitor directly at pin for stability and low-noise operation |
| GND | Ground reference | Low-impedance return path for ground current only; tie to quiet ground plane or output capacitor cathode |
Key Features
| Feature | Design Value |
|---|---|
| Output discharge on shutdown | Active pull-down via internal transistor (RDCH = 100 Ω typical) clears VOUT within microseconds - prevents back-powering of upstream circuitry |
| Ultra-low IQ operation | 250 nA typical quiescent current enables >10-year battery life in 1% duty-cycle IoT endpoints |
| Ceramic capacitor stability | Stable with 1.0 µF X7R ceramic output cap - eliminates ESR requirements and simplifies layout vs. electrolytic/tantalum solutions |
| Wide input voltage range | 1.8–5.5 V operation supports single-cell Li-ion, NiMH, alkaline, and energy-harvested sources without pre-regulation |
| Overcurrent protection | Foldback current limit (50 mA at RLOAD = 1 Ω) prevents thermal runaway during sustained short-circuit events |
Applications
| Energy Harvesting Node | Medical Hearing Aid |
|---|---|
Use Scenario: Powering wireless sensor transmitters from thermoelectric or piezoelectric harvesters delivering <100 µW average power. IC Role / Device Role / Timing Role: Primary voltage regulator converting variable harvester output to stable 3.0 V for ultra-low-power MCU and BLE radio. Use Value: 250 nA IQ minimizes no-load loss, enabling reliable startup even at 2.0 V input - critical for intermittent energy sources. | Use Scenario: Supplying ASIC and MEMS microphone in disposable hearing aids powered by zinc-air batteries. IC Role / Device Role / Timing Role: Main power rail regulator with fast load transient response to support real-time audio processing bursts. Use Value: 400 mV dropout at 150 mA extends usable battery life by >20% compared to standard LDOs, delaying replacement intervals. |
| Smart Wearable Watch | Industrial Wireless Sensor |
Use Scenario: Regulating power for motion-sensing subsystem (accelerometer + MCU) in wrist-worn fitness trackers. IC Role / Device Role / Timing Role: Always-on LDO supplying 3.0 V to wake-on-motion circuitry during deep-sleep mode. Use Value: 10 nA shutdown current ensures negligible drain during multi-week storage or transport, preserving factory charge. | Use Scenario: Powering LoRaWAN node in remote condition-monitoring deployments with 10-year battery target. IC Role / Device Role / Timing Role: Primary regulator for microcontroller, LoRa transceiver, and temperature/humidity sensor ICs. Use Value: Output discharge prevents leakage paths through sensor bias networks during sleep, eliminating false wake-ups and extending field lifetime. |
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 no output discharge; SOT-23-3 package | Lacks active VOUT discharge - unsuitable where back-powering or residual voltage must be avoided | Select when lowest possible BOM cost is prioritized and discharge is not required |
| TNIV0300300X | 3.0 V, 150 mA, 300 nA IQ, no discharge; 3-pin SOT-23, RoHS-compliant | Higher IQ and no discharge; slightly larger dropout (500 mV @ 150 mA) | Consider for legacy designs requiring second-source availability with relaxed IQ tolerance |
Compared with MCP1700T-3002E/MB and TNIV0300300X, the MCP1811AT-030/OT uniquely delivers output discharge capability alongside 250 nA IQ and 400 mV dropout - making it the only choice for battery-powered systems requiring both ultra-low standby loss and controlled power-rail collapse during shutdown.
Availability
MCP1811AT-030/OT is available at Aetrix Electronics and suitable for energy harvesting nodes, medical hearing aids, and smart wearable watches requiring stable component supply with guaranteed long-term manufacturability and traceable sourcing.
Supply support for MCP1811AT-030/OT 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 components, and timing solutions, with core expertise in low-power semiconductor design for embedded and industrial applications.
The MCP1811A/B series was developed specifically for ultra-long-life battery and energy-harvesting systems - emphasizing 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 MCP1811AT-030/OT?
The MCP1811AT-030/OT has an absolute maximum input voltage rating of +6.0 V. Operation beyond this voltage risks permanent damage. For reliable continuous use, the recommended input range is 1.8 V to 5.5 V, with minimum VIN dependent on load current and dropout - e.g., ≥3.4 V required to sustain 150 mA at 3.0 V output.
Does the MCP1811AT-030/OT require an input capacitor?
The MCP1811AT-030/OT does not require an input capacitor for stability, as confirmed in the datasheet AC/DC specifications. However, a 1 µF ceramic capacitor placed close to VIN improves PSRR and reduces high-frequency noise coupling - especially beneficial when powered from noisy switchers or long PCB traces.
How does the output discharge function work in the MCP1811AT-030/OT?
The MCP1811AT-030/OT integrates an NMOS discharge transistor between VOUT and GND, activated when SHDN is pulled low. With RDCH ≈ 100 Ω, it discharges a 1 µF output capacitor from 3.0 V to <100 mV in under 500 µs - preventing back-powering of upstream circuitry and ensuring clean power sequencing in multi-rail systems.
Can the MCP1811AT-030/OT operate with a 1.0 µF X5R ceramic capacitor?
Yes - the MCP1811AT-030/OT is explicitly characterized and guaranteed stable with 1.0 µF X7R ceramic output capacitors, and X5R types meeting same ESR (<10 mΩ) and capacitance retention specs perform equivalently. Avoid Z5U or Y5V due to excessive capacitance drift with voltage/temperature.
What is the thermal resistance (θJA) of the MCP1811AT-030/OT in its SOT-23-3 package?
The MCP1811AT-030/OT in the 3-Lead SOT-23 package has a thermal resistance θJA of 211.33°C/W on a JEDEC-standard 4-layer FR4 board with 1 oz. copper. This value assumes standard layout; adding thermal vias under the pad (if present) or increasing copper area significantly lowers effective θJA in real designs.
MCP1811AT-030/OT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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-23-5
MCP1811AT-030/OT FAQ
1.How can I place an order for MCP1811AT-030/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1811AT-030/OT 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 MCP1811AT-030/OT reliable?
The price and inventory of MCP1811AT-030/OT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1811AT-030/OT is usually 5 days.
3.What payment methods are accepted for MCP1811AT-030/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1811AT-030/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1811AT-030/OT?
MCP1811AT-030/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1811AT-030/OT 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 MCP1811AT-030/OT?
For technical support, including MCP1811AT-030/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1811AT-030/OT requirements.
6.How does Aetrix verify that MCP1811AT-030/OT is sourced from the original manufacturer or authorized distributors?
All MCP1811AT-030/OT 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 MCP1811AT-030/OT meets industry standards.
7.What is the process for return or replacement of MCP1811AT-030/OT?
All MCP1811AT-030/OT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1811AT-030/OT, 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 MCP1811AT-030/OT part is unused and in its original packaging.
Return procedure for MCP1811AT-030/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP1811AT-030/OT 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…
