My Inquiry
My Account
Microchip Technology MCP1811AT-020/TT
- Part No.:
- MCP1811AT-020/TT
- Manufacturer:
- Microchip Technology
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MCP1811AT-020/TT.pdf
- Description:
- IC REG LINEAR 2V 150MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,854
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MCP1811AT-020/TT from Microchip Technology is a 150 mA ultra-low-quiescent-current LDO regulator with fixed 2.0V output, 250 nA typical IQ, and output discharge functionality (MCP1811A variant). It operates from 1.8V to 5.5V input, supports ceramic output capacitors as low as 1.0 µF, and delivers stable voltage for energy-constrained systems such as wearable medical sensors and smart card interfaces.
For engineers reviewing the MCP1811AT-020/TT datasheet, MCP1811AT-020/TT pinout, MCP1811AT-020/TT application, or MCP1811AT-020/TT equivalent, key selection criteria include its 2.0V fixed output, 150 mA load capability, 400 mV dropout at full load, shutdown current of 10 nA (typ), and compatibility with 3-lead SOT-23 packaging for space-limited PCB layouts.
Technical Context
The MCP1811AT-020/TT implements a PMOS pass transistor architecture enabling ultra-low quiescent current while maintaining tight output regulation across temperature and load. Its integrated discharge transistor actively pulls VOUT to GND during shutdown (SHDN = GND), eliminating residual voltage hold-up in battery-powered sleep modes.
It features internal overcurrent protection with foldback limiting (50 mA at RLOAD = 1 Ω) and achieves ±25 mV load regulation from 1 mA to 150 mA. Stability is guaranteed with 1.0 µF X7R ceramic output capacitance, reducing solution size and noise versus electrolytic alternatives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.0V ±4% - ensures precise biasing for 2.0V logic rails or analog sensor front-ends without external feedback. |
| Max Output Current | 150 mA - sufficient to power microcontrollers, BLE radios, or multi-sensor nodes in compact wearables. |
| Quiescent Current | 250 nA (typ) - enables >10-year battery life in coin-cell–powered devices operating in deep-sleep cycles. |
| Dropout Voltage | 400 mV (typ) at 150 mA - allows operation down to VIN = 2.4V, maximizing usable battery voltage range. |
| Shutdown Current | 10 nA (typ) - minimizes leakage during system hibernation, critical for energy harvesting and zero-power standby. |
| Input Voltage Range | 1.8V to 5.5V - supports single-cell Li-ion, LiFePO₄, alkaline, or USB-supplied systems without pre-regulation. |
| Output Capacitor | 1.0 µF ceramic (X7R) - enables compact, low-ESR, low-noise filtering; eliminates need for bulk electrolytics. |
Pinout & Package
Package: 3-Lead SOT-23 (SC-59), RoHS-compliant, moisture-sensitive level 1.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input voltage supply | Accepts 1.8–5.5V unregulated input; requires local 1 µF ceramic bypass capacitor. |
| 2 (GND) | Ground reference | Low-impedance return path for regulator ground current only; tie directly to output capacitor cathode for optimal PSRR. |
| 3 (VOUT) | Regulated output | Delivers stable 2.0V; connects to load and 1.0 µF ceramic output capacitor; includes active discharge when SHDN asserted. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 250 nA typical - extends battery life in intermittent-sampling applications like environmental monitors. |
| Active output discharge | 100 Ω typical RDCH - discharges VOUT within microseconds after shutdown, preventing back-powering of upstream circuitry. |
| Ceramic-capacitor stability | Stable with ≥1.0 µF X7R - reduces BOM count, board area, and EMI vs. tantalum/electrolytic solutions. |
| Overcurrent foldback | 50 mA short-circuit limit - protects device and source during fault conditions without thermal runaway. |
| Wide temperature range | -40°C to +85°C operating junction - qualified for industrial and medical wearable environments. |
Applications
| Energy Harvesting Node | Smart Card Interface |
|---|---|
|
Use Scenario: Powering a wireless sensor node powered by a thermoelectric generator or RF harvester with microamp-level average output. IC Role / Device Role / Timing Role: Primary voltage regulator converting variable harvested voltage (2.0–4.5V) to stable 2.0V for MCU and radio. Use Value: 250 nA quiescent current ensures >95% of harvested energy reaches the load during idle; 1.0 µF ceramic support simplifies ultra-thin PCB design. |
Use Scenario: Supplying regulated 2.0V to ISO/IEC 7816-compliant contact smart cards in portable readers or payment terminals. IC Role / Device Role / Timing Role: LDO providing clean, fast-turn-on power synchronized with card insertion detection and reset timing. Use Value: 400 mV dropout enables operation from weak 3.0V battery sources; output discharge prevents card latch-up during hot-plug removal. |
| Wearable Health Monitor | Hearing Aid Front-End |
|
Use Scenario: Powering an optical heart-rate sensor and BLE SoC in a wrist-worn device using a CR2032 coin cell. IC Role / Device Role / Timing Role: Main power rail regulator delivering 2.0V to analog front-end and digital subsystem during burst sampling. Use Value: 10 nA shutdown current preserves battery charge during 99%+ sleep time; ±25 mV load regulation maintains ADC accuracy across dynamic current steps. |
Use Scenario: Providing ultra-low-noise 2.0V bias to MEMS microphone preamplifiers and analog signal chains in hearing aids. IC Role / Device Role / Timing Role: Low-noise LDO replacing switching regulators to eliminate switching artifacts in audio band. Use Value: 169.31 µVrms integrated noise (10 Hz–100 kHz) ensures high SNR; ceramic capacitor compatibility avoids piezoelectric microphonics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1811AT-020/OT | Same electrical specs; 3-lead SC70 package (smaller footprint, higher θJA = 300.6°C/W). | Preferred for ultra-dense layouts where 1.25 mm × 0.8 mm SC70 saves board area but thermal margin is less critical. | Select /OT for space-constrained designs with adequate airflow; verify thermal rise under 150 mA continuous load. |
| Torex XC6210B202MR-G | 2.0V fixed, 150 mA, 250 nA IQ, but no output discharge; 3-lead SOT-23 package. | Suitable for non-shutdown-critical applications where residual VOUT hold-up is acceptable. | Choose when discharge function is unnecessary and cross-manufacturer second sourcing is required. |
Compared with MCP1811AT-020/TT, the /OT variant offers identical performance in a smaller package with trade-offs in thermal resistance, while the XC6210B202MR-G provides pin-compatible functionality without discharge-making it viable only where that feature is unused.
Availability
MCP1811AT-020/TT is available at Aetrix Electronics and suitable for energy harvesting nodes, smart card readers, and wearable health monitors requiring stable component supply with long-term lifecycle assurance.
Supply support for MCP1811AT-020/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 Inc. is a leading provider of microcontroller, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets.
The MCP1811A/B series was designed specifically for ultra-low-power, long-life battery and energy-harvesting applications-emphasizing nanoscale quiescent current, ceramic-capacitor compatibility, and integrated discharge control.
FAQ
What is the output voltage tolerance of the MCP1811AT-020/TT?
The MCP1811AT-020/TT has a fixed 2.0V output with a tolerance of ±4% over temperature (-40°C to +85°C) and load (1 mA to 150 mA), as specified in the DS20006088C datasheet. This ensures reliable operation for 2.0V I/O domains without requiring external trimming or calibration.
Does the MCP1811AT-020/TT require an external shutdown control signal?
No-the MCP1811AT-020/TT does not include a SHDN pin. As a 3-lead SOT-23 variant (VIN, GND, VOUT), it lacks enable/disable functionality. The "A" suffix denotes output discharge capability, but shutdown is implemented externally via VIN control. For active shutdown, select 5-lead variants like MCP1811A-020/OT.
Can the MCP1811AT-020/TT be used with a 0.47 µF output capacitor?
No. The MCP1811AT-020/TT requires a minimum 1.0 µF X7R ceramic output capacitor for guaranteed stability per DS20006088C. Using 0.47 µF risks oscillation or poor transient response. Always use ≥1.0 µF rated for the full input voltage range and placed within 2 mm of VOUT/GND pins.
What is the maximum power dissipation of the MCP1811AT-020/TT in SOT-23 package?
With θJA = 211.33°C/W (JEDEC 4-layer board), the MCP1811AT-020/TT's max power dissipation is limited to ~350 mW before exceeding +85°C junction temperature. At 150 mA load and 400 mV dropout, dissipation is 60 mW-well within safe margin. Derate linearly above +25°C ambient.
Is the MCP1811AT-020/TT compatible with lead-free reflow soldering profiles?
Yes. The MCP1811AT-020/TT is RoHS-compliant and qualified for standard lead-free reflow per J-STD-020, with peak temperature up to 260°C. Its SOT-23 package uses matte tin plating and withstands three reflow cycles without degradation to electrical performance or wirebond integrity.
MCP1811AT-020/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):
- 2V
- 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
MCP1811AT-020/TT FAQ
1.How can I place an order for MCP1811AT-020/TT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1811AT-020/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 MCP1811AT-020/TT reliable?
The price and inventory of MCP1811AT-020/TT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1811AT-020/TT is usually 5 days.
3.What payment methods are accepted for MCP1811AT-020/TT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1811AT-020/TT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1811AT-020/TT?
MCP1811AT-020/TT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1811AT-020/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 MCP1811AT-020/TT?
For technical support, including MCP1811AT-020/TT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1811AT-020/TT requirements.
6.How does Aetrix verify that MCP1811AT-020/TT is sourced from the original manufacturer or authorized distributors?
All MCP1811AT-020/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 MCP1811AT-020/TT meets industry standards.
7.What is the process for return or replacement of MCP1811AT-020/TT?
All MCP1811AT-020/TT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1811AT-020/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 MCP1811AT-020/TT part is unused and in its original packaging.
Return procedure for MCP1811AT-020/TT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP1811AT-020/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…
