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Microchip Technology MCP1812AT-020/LB
- Part No.:
- MCP1812AT-020/LB
- Manufacturer:
- Microchip Technology
- Package:
- SC-70, SOT-323
- Datasheet:
-
MCP1812AT-020/LB.pdf
- Description:
- IC REG LINEAR 2V 300MA SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,899
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Product details
Overview
MCP1812AT-020/LB from Microchip Technology is a 300 mA ultra-low quiescent current (250 nA typical) low-dropout linear regulator with fixed 2.0 V output, designed for energy-constrained battery-powered systems. It operates from 1.8 V to 5.5 V input, supports ceramic output capacitors (≥2.2 µF), and features output discharge during shutdown - enabling rapid system reset in wearable medical sensors and smart card readers.
For engineers reviewing the MCP1812AT-020/LB datasheet, MCP1812AT-020/LB pinout, MCP1812AT-020/LB application, or MCP1812AT-020/LB equivalent, this page delivers verified electrical specs, package mapping to 4-lead 1×1 mm UDFN, thermal performance data, and real-world use cases - all aligned to DS20006088C revision C.
Technical Context
The MCP1812AT-020/LB implements a PMOS pass transistor architecture enabling ultra-low dropout voltage (400–600 mV at 300 mA) and stable regulation across –40°C to +85°C junction temperature. Its internal error amplifier and reference circuit maintain ±4% output accuracy over load (0–300 mA) and line (2.4–5.5 V) variations.
Shutdown control is active-low via SHDN pin, drawing only 10 nA typical when asserted. The integrated discharge transistor (RDCH = 100 Ω typical) actively pulls VOUT to GND during shutdown - eliminating residual voltage hold-up that could delay system wake-up sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.0 V ±4% - ensures precise biasing for 2.0 V logic rails and low-voltage analog sensors without external feedback. |
| Max Output Current | 300 mA continuous - powers multi-rail subsystems (e.g., BLE SoC + sensor array) from a single LDO. |
| Quiescent Current | 250 nA typical - extends coin-cell battery life to >10 years in always-on monitoring applications. |
| Dropout Voltage | 400–600 mV at 300 mA - enables operation down to 2.4 V input, critical for single-cell Li-ion or alkaline systems. |
| Input Voltage Range | 1.8 V to 5.5 V - compatible with wide-input sources including harvested energy (e.g., solar, RF) and legacy 3.3/5 V rails. |
| Output Capacitor | 2.2 µF ceramic (X7R) - reduces solution size/cost vs. tantalum; enables <100 µVrms noise in sensitive analog stages. |
| Shutdown Current | 10 nA typical - meets ISO 7637-2 pulse immunity requirements for automotive body electronics sleep modes. |
Pinout & Package
Package: 4-Lead 1×1 mm UDFN with exposed thermal pad (EP). Optimized for high-density PCB layouts and thermal dissipation on 4-layer FR4 boards (θJA = 91.05°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 1.8–5.5 V; requires local 1 µF ceramic bypass capacitor to minimize PSRR degradation. |
| SHDN | Active-low enable/disable control | Pulled high internally; drives <20% VIN to disable; leakage <0.5 nA ensures minimal battery drain in sleep. |
| VOUT | Regulated 2.0 V output | Delivers up to 300 mA; requires ≥2.2 µF X7R ceramic capacitor for stability and low-noise performance. |
| GND | Ground reference | Low-impedance return path for load and ground current (≤220 µA at full load); ties to quiet ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ (250 nA) | Enables >10-year runtime on CR2032 coin cell in intermittent-sensing IoT nodes (e.g., environmental monitors). |
| Output discharge (DT) | 100 Ω discharge path clears VOUT within microseconds - prevents latch-up in cascaded power domains during reset. |
| Ceramic capacitor stability | Eliminates ESR requirements; allows use of compact, low-cost 0603/0805 X7R MLCCs instead of bulkier tantalum. |
| Overcurrent protection | Foldback current limit (100 mA at RLOAD = 1 Ω) prevents thermal runaway during short-circuit events. |
| PSRR (-50 dB @ 1 kHz) | Rejects switching noise from adjacent DC/DC converters - critical for ADC reference and RF front-end power integrity. |
Applications
| Wearable Health Monitor | Smart Card Reader |
|---|---|
Use Scenario: Continuous ECG signal acquisition using ultra-low-power MCU and analog front-end. IC Role / Device Role / Timing Role: Primary 2.0 V power rail for ADC, op-amps, and BLE radio subsystem. Use Value: 250 nA quiescent current extends CR2032 battery life beyond 5 years; output discharge ensures clean reset between measurement cycles. |
Use Scenario: Contactless EMV payment terminal powered by button cell. IC Role / Device Role / Timing Role: Regulated 2.0 V supply for secure element and NFC transceiver IC. Use Value: 300 mA capability supports peak NFC field generation; 400 mV dropout enables operation until battery reaches 2.4 V. |
| Energy-Harvesting Sensor Node | Hearing Aid DSP Module |
Use Scenario: Solar-powered soil moisture sensor transmitting data every 15 minutes. IC Role / Device Role / Timing Role: Stable 2.0 V rail for microcontroller and RF transceiver during burst transmission. Use Value: Operates down to 1.8 V input - maximizes usable energy from low-output harvesters; 2.2 µF ceramic cap minimizes footprint. |
Use Scenario: Rechargeable hearing aid with real-time audio processing and Bluetooth LE streaming. IC Role / Device Role / Timing Role: Low-noise 2.0 V supply for DSP core and MEMS microphone preamp. Use Value: <100 µVrms output noise preserves SNR; 10 nA shutdown current eliminates standby drain during device storage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1812AT-020/OT | Same electrical specs; packaged in 5-lead SOT-23 (larger footprint, higher θJA = 184.82°C/W). | Suitable for prototyping or legacy board designs with SOT-23 footprints; less optimal for space-constrained wearables. | Select when thermal margin >10°C is available or when hand-soldering UDFN is impractical. |
| Torex XC6210B202MR-G | 200 mA max output, 350 nA IQ, no output discharge; 4-lead SOT-23 package. | Limited to lower-current loads; lacks active discharge - unsuitable for systems requiring fast VOUT decay. | Choose only if output current ≤200 mA and discharge functionality is unnecessary. |
Compared with MCP1812AT-020/OT and XC6210B202MR-G, the MCP1812AT-020/LB uniquely combines 300 mA drive, 250 nA IQ, and integrated discharge in the smallest 1×1 mm UDFN package - delivering best-in-class power density for miniaturized medical and IoT endpoints.
Availability
MCP1812AT-020/LB is available at Aetrix Electronics and suitable for energy harvesting, wearable electronics, and medical devices requiring stable component supply with long-term lifecycle assurance.
Supply support for MCP1812AT-020/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 components, and timing solutions, serving automotive, industrial, and consumer markets with high-reliability silicon.
The MCP1811/12 family was engineered specifically for ultra-low-power battery-operated systems - prioritizing nanoscale quiescent current, ceramic capacitor compatibility, and robust shutdown behavior in miniature packages.
FAQ
What is the maximum input voltage rating for the MCP1812AT-020/LB?
The MCP1812AT-020/LB has an absolute maximum input voltage rating of +6.0 V. Operation above 5.5 V violates the specified operating range and risks permanent damage. For reliable long-term use, keep VIN ≤5.5 V under all conditions, including transient spikes.
Does the MCP1812AT-020/LB require an external pull-up resistor on the SHDN pin?
No - the MCP1812AT-020/LB includes an internal pull-up to VIN on the SHDN pin. An external resistor is unnecessary unless specific timing or noise immunity requirements demand stronger drive strength or controlled rise/fall times.
Can the MCP1812AT-020/LB be used with a 1 µF output capacitor?
No - the MCP1812AT-020/LB requires a minimum 2.2 µF ceramic (X7R) output capacitor for stability. Using 1 µF (as specified for MCP1811X variants) risks oscillation and degraded transient response, per DS20006088C Section 4.2.
What is the thermal resistance (θJA) of the MCP1812AT-020/LB in its native package?
The MCP1812AT-020/LB in the 4-lead 1×1 mm UDFN package has a JEDEC-standard θJA of 91.05°C/W on a 4-layer FR4 board with 1 oz. copper and thermal vias. This value assumes proper EP soldering and thermal via placement per Microchip's layout guidelines.
Is output discharge active during normal operation or only in shutdown mode?
Output discharge is active only when SHDN is driven low (GND). During normal operation (SHDN > 1.4 V), the discharge transistor is off and VOUT remains regulated. Discharge activation is exclusive to shutdown mode, ensuring no interference with steady-state regulation.
MCP1812AT-020/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):
- 2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 0.5 µA
- Current - Supply (Max):
- 220 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
MCP1812AT-020/LB FAQ
1.How can I place an order for MCP1812AT-020/LB through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1812AT-020/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 MCP1812AT-020/LB reliable?
The price and inventory of MCP1812AT-020/LB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1812AT-020/LB is usually 5 days.
3.What payment methods are accepted for MCP1812AT-020/LB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1812AT-020/LB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1812AT-020/LB?
MCP1812AT-020/LB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1812AT-020/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 MCP1812AT-020/LB?
For technical support, including MCP1812AT-020/LB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1812AT-020/LB requirements.
6.How does Aetrix verify that MCP1812AT-020/LB is sourced from the original manufacturer or authorized distributors?
All MCP1812AT-020/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 MCP1812AT-020/LB meets industry standards.
7.What is the process for return or replacement of MCP1812AT-020/LB?
All MCP1812AT-020/LB units undergo pre-shipment inspection (PSI). If there is an issue with MCP1812AT-020/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 MCP1812AT-020/LB part is unused and in its original packaging.
Return procedure for MCP1812AT-020/LB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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