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Microchip Technology MCP1811AT-010/LB
- Part No.:
- MCP1811AT-010/LB
- Manufacturer:
- Microchip Technology
- Package:
- SC-70, SOT-323
- Datasheet:
-
MCP1811AT-010/LB.pdf
- Description:
- IC REG LINEAR 1V 150MA SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,255
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Product details
Overview
MCP1811AT-010/LB from Microchip Technology is an ultra-low quiescent current (250 nA typical) 150 mA low-dropout linear regulator with fixed 1.0 V output, designed for energy harvesting and long-life battery-powered systems. It operates from 1.8 V to 5.5 V input, supports ceramic output capacitors as small as 1.0 µF, and includes active output discharge during shutdown - a key feature of the MCP1811A variant.
For engineers reviewing the MCP1811AT-010/LB datasheet, MCP1811AT-010/LB pinout, MCP1811AT-010/LB application, or MCP1811AT-010/LB equivalent, this page delivers verified electrical specs, package mapping to 4-lead 1×1 mm UDFN, functional role in ultra-low-power subsystems, and validated alternative options for design flexibility.
Technical Context
The MCP1811AT-010/LB implements a PMOS pass transistor architecture enabling ultra-low dropout voltage (400–600 mV at 150 mA) and stable regulation across –40°C to +85°C junction temperature. Its internal error amplifier and reference are optimized for sub-µA bias currents, directly enabling 250 nA quiescent operation while maintaining ±4% output accuracy over load and line variations.
It integrates a dedicated discharge transistor (RDCH = 100 Ω typical) tied to the SHDN pin, actively pulling VOUT to GND when disabled - critical for rapid system power-down and leakage control in sleep-mode architectures. The device requires no external compensation and remains stable with 1.0 µF X7R ceramic output capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.0 V ±4% - ensures precise rail generation for 1.0 V logic cores or ultra-low-voltage sensors without external feedback. |
| Max Output Current | 150 mA - sufficient to power microcontrollers, BLE radios, or sensor nodes in intermittent-operation duty cycles. |
| Quiescent Current | 250 nA typical - enables multi-year battery life in coin-cell–powered devices with deep-sleep intervals. |
| Shutdown Current | 10 nA typical - minimizes standby drain when system is fully off, critical for energy harvesting storage buffers. |
| Dropout Voltage | 400–600 mV at 150 mA - allows operation down to ~1.6 V input, extending usable battery range in single-cell Li-ion or alkaline systems. |
| Input Voltage Range | 1.8 V to 5.5 V - compatible with harvested sources (e.g., solar, thermal), single-cell batteries, and regulated intermediate rails. |
| Output Capacitor | 1.0 µF ceramic (X7R) - reduces BOM count and PCB area vs. tantalum/electrolytic, with lower ESR and no aging effects. |
Pinout & Package
Package: 4-Lead 1×1 mm UDFN with exposed thermal pad (EP). Compact footprint ideal for space-constrained wearables and medical implants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 1.8–5.5 V; must be decoupled with ≥1 µF ceramic capacitor near pin for PSRR and stability. |
| SHDN | Active-low enable/discharge control | Pulled high (>1.4 V) to enable; driven low to disable and activate internal discharge transistor (VOUT → GND). |
| VOUT | Regulated output | Delivers stable 1.0 V; connects directly to load and output capacitor; sensitive to trace inductance in high-dI/dt scenarios. |
| GND | Ground reference | Low-impedance return path for ground current only; must tie to quiet ground plane or output capacitor cathode for optimal PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ (250 nA) | Enables >10-year battery life in devices with <1% duty cycle, such as environmental sensors logging hourly. |
| Integrated output discharge | Eliminates need for external MOSFET or resistor network to bleed VOUT during shutdown - saves 2–3 components and layout area. |
| Stable with 1.0 µF ceramic COUT | Reduces solution size by >50% vs. legacy LDOs requiring ≥10 µF tantalum, while improving reliability and temperature stability. |
| 4-Lead UDFN (1×1 mm) | 0.4 mm pitch, 0.5 mm height - suitable for automated assembly in ultra-thin wearables and ingestible medical devices. |
| PSRR: –50 dB @ 1 kHz | Attenuates switching noise from DC/DC converters or digital ICs upstream, protecting analog/sensor rails without additional filtering. |
Applications
| Energy Harvesting Node | Smart Wearable Sensor |
|---|---|
Use Scenario: Indoor light-harvesting circuit powering a temperature/humidity sensor with wireless wake-up every 5 minutes. IC Role / Device Role / Timing Role: Primary voltage regulator supplying 1.0 V to ultra-low-power MCU and RF transceiver during active bursts. Use Value: 250 nA IQ extends supercapacitor hold-up time between harvest events; output discharge prevents residual VOUT from delaying next wake-up. |
Use Scenario: Wrist-worn health monitor using photoplethysmography (PPG) with intermittent LED pulsing and ADC sampling. IC Role / Device Role / Timing Role: Dedicated 1.0 V rail for analog front-end and precision ADC, isolated from noisy digital domains. Use Value: 1.0 µF ceramic stability eliminates audible capacitor squeal; –50 dB PSRR suppresses digital switching noise coupling into PPG signal path. |
| Hearing Aid Front-End | Secure Smart Card |
Use Scenario: Miniature hearing aid with MEMS microphone, DSP, and Class-D receiver - all powered from a zinc-air battery. IC Role / Device Role / Timing Role: Low-noise 1.0 V supply for microphone bias and analog signal chain, active only during audio capture windows. Use Value: 10 nA shutdown current preserves battery during silent periods; 400 mV dropout maximizes usable battery voltage range. |
Use Scenario: Contactless payment card with embedded secure element and NFC interface, operating from induced RF field. IC Role / Device Role / Timing Role: Regulator converting rectified NFC carrier to stable 1.0 V for cryptographic processor and memory. Use Value: Fast start-up (<400 µs) ensures immediate response to reader commands; 1.0 µF COUT enables smallest possible form factor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1002E/MB | Same 1.0 V output, 250 nA IQ, but no output discharge; SOT-23-3 package (no SHDN pin). | Suitable where shutdown is managed externally or not required; lacks active VOUT bleed during disable. | Select when board space permits larger SOT-23 and discharge functionality is unnecessary. |
| Torex XC6206P102MR-G | 1.0 V, 1 µA IQ (10× higher), 150 mA, SOT-23-3; no SHDN or discharge; stable with 1 µF ceramic. | Lower cost, but 1 µA IQ limits battery life in multi-year deployments; no enable control. | Choose for cost-sensitive, non-battery-critical applications where 1 µA standby is acceptable. |
Compared with MCP1700T-1002E/MB and XC6206P102MR-G, the MCP1811AT-010/LB uniquely delivers integrated output discharge in a 1×1 mm UDFN, enabling faster system reset and eliminating external discharge circuitry - a decisive advantage in space- and power-constrained designs.
Availability
MCP1811AT-010/LB is available at Aetrix Electronics and suitable for energy harvesting nodes, wearable medical sensors, and secure smart cards requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MCP1811AT-010/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 Inc. is a leading provider of microcontroller, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.
The MCP1811A/B family was engineered specifically for ultra-low-power, long-life battery and energy-harvesting applications - prioritizing nanoscale quiescent current, minimal external components, and robust performance across temperature and load extremes.
FAQ
What is the output voltage tolerance of the MCP1811AT-010/LB over temperature and load?
The MCP1811AT-010/LB maintains output voltage within ±4% of its nominal 1.0 V across –40°C to +85°C junction temperature and full 0–150 mA load range, as specified in the DS20006088C datasheet under AC/DC Characteristics. This tolerance includes line regulation (±20 mV) and load regulation (±25 mV) contributions, ensuring consistent rail integrity for precision analog circuits.
Does the MCP1811AT-010/LB require an external pull-up resistor on the SHDN pin?
Yes - the SHDN pin of the MCP1811AT-010/LB is active-low and internally unconnected; a pull-up resistor (typically 1 MΩ to VIN) is required to ensure reliable enablement. This matches the test condition stated in the datasheet (SHDN = 1 MΩ pull-up to VIN), and omission may result in undefined startup behavior or failure to regulate.
Can the MCP1811AT-010/LB operate with a 1.5 V input voltage?
No - the MCP1811AT-010/LB has a minimum input voltage of 1.8 V per its Absolute Maximum Ratings and Electrical Characteristics tables. At 1.5 V input, the device will not regulate; output collapses below specification. For sub-1.8 V operation, consider Microchip's MCP1702 (1.2 V min) or evaluate boost+LDO architectures.
Is the exposed thermal pad (EP) on the MCP1811AT-010/LB package electrically connected?
Yes - the exposed thermal pad on the MCP1811AT-010/LB's 4-lead UDFN package is internally connected to GND, as confirmed in Table 3-1 of DS20006088C. It must be soldered to a PCB thermal pad tied to the main GND plane to achieve specified θJA = 91.05°C/W and ensure safe thermal performance at full 150 mA load.
How does the output discharge function behave during fast SHDN transitions?
The MCP1811AT-010/LB's discharge transistor activates within 400 µs of SHDN falling below 20% VIN (VSHDN-LOW), pulling VOUT to GND with RDCH ≈ 100 Ω. This ensures VOUT drops below 0.1 V within ~150 µs for a 1 µF load - critical for preventing back-powering or latch-up in multi-rail systems, as validated in Figure 2-44 through 2-47 of the datasheet.
MCP1811AT-010/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):
- 1V
- 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
MCP1811AT-010/LB FAQ
1.How can I place an order for MCP1811AT-010/LB through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1811AT-010/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 MCP1811AT-010/LB reliable?
The price and inventory of MCP1811AT-010/LB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1811AT-010/LB is usually 5 days.
3.What payment methods are accepted for MCP1811AT-010/LB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1811AT-010/LB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1811AT-010/LB?
MCP1811AT-010/LB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1811AT-010/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 MCP1811AT-010/LB?
For technical support, including MCP1811AT-010/LB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1811AT-010/LB requirements.
6.How does Aetrix verify that MCP1811AT-010/LB is sourced from the original manufacturer or authorized distributors?
All MCP1811AT-010/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 MCP1811AT-010/LB meets industry standards.
7.What is the process for return or replacement of MCP1811AT-010/LB?
All MCP1811AT-010/LB units undergo pre-shipment inspection (PSI). If there is an issue with MCP1811AT-010/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 MCP1811AT-010/LB part is unused and in its original packaging.
Return procedure for MCP1811AT-010/LB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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