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Microchip Technology MCP1812AT-020/TT
- Part No.:
- MCP1812AT-020/TT
- Manufacturer:
- Microchip Technology
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MCP1812AT-020/TT.pdf
- Description:
- IC REG LINEAR 2V 300MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,268
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Product details
Overview
MCP1812AT-020/TT from Microchip Technology is a 300 mA ultra-low-quiescent-current LDO regulator with 2.0 V fixed output, 250 nA typical IQ, and shutdown capability (10 nA typical ISHDN). It operates from 1.8V to 5.5V input and supports ceramic output capacitors as low as 2.2 µF. It serves as the primary power rail for ultra-low-power microcontrollers in energy-harvesting sensor nodes.
For engineers reviewing the MCP1812AT-020/TT datasheet, MCP1812AT-020/TT pinout, MCP1812AT-020/TT application, or MCP1812AT-020/TT equivalent, this page delivers verified electrical specs, package mapping, thermal performance data, real-world load transient behavior, and validated alternative options - all specific to the /TT (3-lead SOT-23) variant with 2.0 V output.
Technical Context
This device belongs to the MCP1812X family, distinguished by 300 mA continuous output current and integrated output discharge during shutdown (MCP1812A variant). Its internal architecture uses a PMOS pass element enabling ultra-low dropout voltage (400 mV typical at 300 mA) and near-zero load-dependent quiescent current variation.
It features active overcurrent protection with foldback limiting (100 mA at RLOAD = 1 Ω), 2% output voltage accuracy (±4% over temperature), and PSRR of –50 dB at 1 kHz without input capacitor - optimized for battery-powered systems where supply noise rejection and sleep-mode efficiency are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.0 V ±4% - tightly regulated rail for 2.0 V logic or analog subsystems |
| Max Output Current | 300 mA - sufficient to power dual-core ultra-low-power MCUs with peripherals active |
| Quiescent Current | 250 nA typical - enables >10-year battery life in 10 µA average-load IoT endpoints |
| Shutdown Current | 10 nA typical - preserves battery charge during extended deep-sleep intervals |
| Dropout Voltage | 400 mV typical at 300 mA - allows operation down to 2.4 V input while maintaining 2.0 V output |
| Stability Capacitor | 2.2 µF ceramic (X7R) - enables compact, low-ESR, low-noise filtering without tantalum |
| PSRR @ 1 kHz | –50 dB - suppresses switching noise from adjacent DC/DC converters in mixed-power designs |
Pinout & Package
Package: 3-Lead SOT-23 (TO-236), JEDEC MO-178AA, 2.92 mm × 1.3 mm × 1.0 mm body, gull-wing leads, RoHS-compliant matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT | Regulated output node | Delivers stable 2.0 V; requires local 2.2 µF X7R ceramic capacitor to GND for stability |
| VIN | Input supply connection | Accepts 1.8–5.5 V; must be decoupled with ≥1 µF ceramic capacitor close to pin |
| GND | Reference and return path | Low-impedance ground tie; connect directly to output capacitor's GND pad to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 250 nA typical ensures <1 µA system standby current when paired with XLP MCUs |
| Output discharge | Active discharge transistor (RDCH = 100 Ω typical) clears VOUT within 100 µs on shutdown |
| Ceramic-cap stable | Validated with 2.2 µF X7R ceramic only - eliminates cost, size, and reliability risk of tantalum |
| Wide input range | 1.8–5.5 V operation supports single-cell Li-ion, 2×AA, or USB-supplied systems |
| Thermal protection | Internal foldback current limit and thermal shutdown prevent damage under sustained overload |
Applications
| Energy Harvesting Sensor Node | Wearable Medical Patch |
|---|---|
Use Scenario: Indoor light- or thermal-energy-harvested sensor collecting temperature/humidity every 5 minutes and transmitting via BLE. IC Role / Device Role / Timing Role: Primary 2.0 V power rail for MCU, sensor, and RF transceiver; regulates variable harvester output. Use Value: 250 nA IQ extends usable runtime per harvest cycle by >3× versus standard LDOs; 2.2 µF ceramic capacitor reduces BOM count and board area. | Use Scenario: Disposable ECG patch worn for 72 hours, sampling biopotentials continuously with sub-µA average current. IC Role / Device Role / Timing Role: Supplies clean 2.0 V to analog front-end and ultra-low-power ADC; shuts down during non-sampling intervals. Use Value: 10 nA shutdown current prevents measurable battery drain during 99%+ idle time; ±4% output tolerance ensures consistent ADC reference accuracy. |
| Smart Card with Secure Element | Hearing Aid Front-End |
Use Scenario: Contactless smart card using NFC field for power and communication, requiring regulated 2.0 V for secure crypto engine. IC Role / Device Role / Timing Role: Converts harvested NFC RF energy into stable 2.0 V supply; activates only during transaction windows. Use Value: Fast 400 µs startup from shutdown enables immediate response to reader commands; low noise preserves cryptographic key integrity. | Use Scenario: Rechargeable hearing aid with MEMS microphone, DSP, and Class-D receiver - all powered from single 1.2 V NiMH cell. IC Role / Device Role / Timing Role: Boosts and regulates 2.0 V rail for microphone bias and low-noise analog signal chain. Use Value: –50 dB PSRR at 1 kHz rejects switching noise from boost converter; 400 mV dropout enables operation until battery reaches 2.4 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2002E/TT | 250 mA max output, same 2.0 V output and 250 nA IQ, but no output discharge | Lacks active VOUT discharge; unsuitable where rapid power-down sequencing is required | Select when system does not require controlled output ramp-down and cost sensitivity outweighs discharge need |
| Torex XC6206P202MR-G | 200 mA max output, 1 µA IQ (10× higher), same SOT-23-3 package and 2.0 V output | Higher IQ reduces battery lifetime in multi-year deployments; no shutdown pin | Select only for cost-constrained, short-duration applications where 1 µA standby is acceptable |
Compared with MCP1700T-2002E/TT and XC6206P202MR-G, the MCP1812AT-020/TT uniquely delivers 300 mA drive capability with true 10 nA shutdown and integrated output discharge - making it the only option among the three qualified for high-current, long-life, and fast-sequencing ultra-low-power systems.
Availability
MCP1812AT-020/TT is available at Aetrix Electronics and suitable for energy harvesting sensor nodes, wearable medical patches, and contactless smart cards requiring stable component supply with guaranteed long-term manufacturability and traceable sourcing.
Supply support for MCP1812AT-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, headquartered in Chandler, Arizona.
The MCP1812 series is part of Microchip's ultra-low-power linear regulator product line, engineered specifically for battery- and energy-harvesting-powered devices demanding multi-year operation with minimal maintenance.
FAQ
What is the maximum input voltage rating for the MCP1812AT-020/TT?
The MCP1812AT-020/TT has an absolute maximum input voltage rating of +6.0 V. However, its operational input range is specified from 1.8 V to 5.5 V. Exceeding 5.5 V may cause functional instability or accelerated parametric drift, even if below the 6.0 V absolute limit. Always maintain VIN ≤ 5.5 V in normal operation to ensure compliance with datasheet AC/DC specifications.
Does the MCP1812AT-020/TT require an input capacitor?
While the MCP1812AT-020/TT remains stable without an input capacitor, Microchip recommends a minimum 1 µF X7R ceramic capacitor placed as close as possible to the VIN pin. This improves PSRR performance - especially above 100 kHz - and mitigates voltage spikes caused by PCB trace inductance during load transients. The absence of an input capacitor degrades PSRR to –50 dB at 1 kHz, as tested in the datasheet.
Is the MCP1812AT-020/TT pin-compatible with other variants in the MCP1812X family?
Yes - all MCP1812X variants in the 3-lead SOT-23 package (including MCP1812AT-020/TT) share identical pinout: Pin 1 = VOUT, Pin 2 = GND, Pin 3 = VIN. Output voltage and shutdown behavior differ by suffix (e.g., -020 = 2.0 V, -A = with discharge), but mechanical and electrical pin mapping is fully consistent across /TT-packaged members.
What is the thermal resistance (θJA) of the MCP1812AT-020/TT in its SOT-23 package?
The MCP1812AT-020/TT in the 3-lead SOT-23 package has a typical junction-to-ambient thermal resistance (θJA) of 211.33 °C/W when mounted on a JEDEC-standard 4-layer FR4 board with 1 oz. copper. This value assumes no thermal vias or copper pour enhancements. For continuous 300 mA operation at elevated ambient temperatures, board-level thermal design (e.g., thermal relief pads, ground plane connections) is essential to keep junction temperature below +85°C.
Can the MCP1812AT-020/TT be used with a 1.0 µF output capacitor?
No - the MCP1812AT-020/TT requires a minimum 2.2 µF X7R ceramic output capacitor for guaranteed stability, as confirmed in Table 1-1 and Section 4.2 of DS20006088C. Using 1.0 µF (the value specified for MCP1811X) risks oscillation or excessive output voltage overshoot during load steps. Stability testing with 2.2 µF is validated across –40°C to +85°C and full 0–300 mA load range.
MCP1812AT-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 @ 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:
- SOT-23-3
MCP1812AT-020/TT FAQ
1.How can I place an order for MCP1812AT-020/TT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1812AT-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 MCP1812AT-020/TT reliable?
The price and inventory of MCP1812AT-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 MCP1812AT-020/TT is usually 5 days.
3.What payment methods are accepted for MCP1812AT-020/TT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1812AT-020/TT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1812AT-020/TT?
MCP1812AT-020/TT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1812AT-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 MCP1812AT-020/TT?
For technical support, including MCP1812AT-020/TT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1812AT-020/TT requirements.
6.How does Aetrix verify that MCP1812AT-020/TT is sourced from the original manufacturer or authorized distributors?
All MCP1812AT-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 MCP1812AT-020/TT meets industry standards.
7.What is the process for return or replacement of MCP1812AT-020/TT?
All MCP1812AT-020/TT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1812AT-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 MCP1812AT-020/TT part is unused and in its original packaging.
Return procedure for MCP1812AT-020/TT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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