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Microchip Technology MCP1812BT-020/TT
- Part No.:
- MCP1812BT-020/TT
- Manufacturer:
- Microchip Technology
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MCP1812BT-020/TT.pdf
- Description:
- IC REG LINEAR 2V 300MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,520
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Product details
Overview
MCP1812BT-020/TT from Microchip Technology is a 300 mA ultra-low quiescent current (250 nA typical) fixed-output 2.0 V low-dropout linear regulator in a 3-lead SOT-23 package, featuring output discharge during shutdown and stable operation with only 2.2 µF ceramic output capacitance - ideal for energy harvesting and long-life battery-powered wearable electronics.
For engineers reviewing the MCP1812BT-020/TT datasheet, MCP1812BT-020/TT pinout, MCP1812BT-020/TT application, or MCP1812BT-020/TT equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation guidance, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The MCP1812BT-020/TT implements a PMOS pass transistor architecture enabling ultra-low dropout voltage (400 mV typical at 300 mA) and inherent reverse-current blocking. Its internal reference and error amplifier maintain ±4% output voltage accuracy across -40°C to +85°C junction temperature and load currents up to 300 mA.
It integrates a dedicated discharge transistor (RDCH = 100 Ω typical) activated when SHDN = GND, ensuring rapid VOUT collapse to GND during shutdown - critical for system-level power sequencing and leakage control in multi-rail battery systems.
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 microcontrollers without external feedback. |
| Max Output Current | 300 mA continuous - supports higher-current peripherals (e.g., BLE radios, sensors) while maintaining ultra-low IQ. |
| Quiescent Current | 250 nA typical - enables >10-year battery life in coin-cell–powered devices operating mostly in sleep mode. |
| Shutdown Current | 10 nA typical (MCP1812A variant) - reduces standby drain to negligible levels during deep-sleep or storage modes. |
| Dropout Voltage | 400 mV typical at 300 mA - allows regulation down to VIN = 2.4 V, maximizing usable battery voltage range. |
| Stability Capacitor | 2.2 µF ceramic (X7R) - enables compact, low-ESR, low-noise filtering with no tantalum or electrolytic required. |
| PSRR | -50 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
Pinout & Package
Package: 3-Lead SOT-23 (JEDEC MO-178AA), 2.92 mm × 1.3 mm × 1.0 mm body, surface-mount, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 1.8 V to 5.5 V input; must be decoupled with ≥1 µF ceramic capacitor near the pin for stability and transient response. |
| VOUT | Regulated output | Delivers fixed 2.0 V; requires 2.2 µF X7R ceramic capacitor to ground for guaranteed stability and low noise. |
| GND | Ground reference | Low-impedance return path for load and ground current; tie directly to output capacitor ground for optimal PSRR and noise rejection. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ (250 nA) | Enables >10-year runtime on CR2032 coin cell in applications with <1% duty cycle active time. |
| Output discharge (SHDN = GND) | Forces VOUT to GND within microseconds, preventing back-powering of upstream circuitry or floating nodes. |
| 2.2 µF ceramic stability | Eliminates need for large, costly, or aging-prone electrolytic/tantalum capacitors - reduces BOM count and board area. |
| Overcurrent protection | Current limit of 500 mA (typical) prevents thermal runaway during short-circuit or overload events. |
| Wide input range (1.8–5.5 V) | Supports direct regulation from single Li-ion, LiPo, or multi-cell alkaline/NiMH sources without pre-regulation. |
Applications
| Energy Harvesting Systems | Wearable Medical Sensors |
|---|---|
Use Scenario: Powering ultra-low-power environmental sensor nodes powered by thermoelectric or piezoelectric harvesters delivering intermittent µW–mW energy. IC Role / Device Role / Timing Role: Primary voltage regulator converting harvested, unregulated, low-current source into stable 2.0 V rail for MCU and analog front-end. Use Value: 250 nA quiescent current minimizes idle loss, while 2.2 µF ceramic stability accommodates space-constrained harvester PCB layouts. |
Use Scenario: Continuous glucose monitors or hearable-based biometric patches requiring multi-year battery life and sub-µA sleep current. IC Role / Device Role / Timing Role: Main power regulator for ASIC or ARM Cortex-M0+ MCU operating at 2.0 V, with fast wake-up from shutdown via SHDN control. Use Value: 10 nA shutdown current and output discharge prevent parasitic drain and ensure clean power-down sequencing during sensor sampling intervals. |
| Smart Card Interfaces | Long-Life IoT Endpoints |
Use Scenario: Contactless smart cards or secure authentication tokens powered solely by RF field coupling or miniature batteries. IC Role / Device Role / Timing Role: Low-noise, fixed 2.0 V LDO supplying cryptographic IC and EEPROM, rejecting RF-induced ripple on VIN. Use Value: -50 dB PSRR at 1 kHz suppresses carrier-frequency interference; ±4% output tolerance meets ISO/IEC 7816-3 voltage compliance. |
Use Scenario: Wireless soil moisture or structural health monitoring nodes deployed in remote locations with 10+ year maintenance cycles. IC Role / Device Role / Timing Role: Primary regulator for LoRaWAN or NB-IoT transceiver + microcontroller, enabling deep-sleep current <1 µA system-wide. Use Value: 300 mA output headroom supports brief high-current TX bursts; 400 mV dropout extends usable battery voltage down to 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 |
|---|---|---|---|
| MCP1812-020/TT | No output discharge function; SHDN pin present but RDCH transistor omitted. | Suitable where fast VOUT collapse is unnecessary (e.g., non-sequenced single-rail systems). | Select MCP1812BT-020/TT when output discharge is required; choose MCP1812-020/TT for cost-sensitive designs without sequencing needs. |
| TN0202B-2.0TR | 200 mA max output, 350 nA IQ, no SHDN pin, 1 µF min COUT, different pinout (VIN-GND-VOUT). | Limited to lower-current applications; lacks shutdown control and discharge capability. | Use TN0202B-2.0TR only if 300 mA output and active discharge are not required - verify pin compatibility before PCB reuse. |
Compared with MCP1812-020/TT, the MCP1812BT-020/TT adds essential output discharge for safe power sequencing; versus TN0202B-2.0TR, it delivers 50% higher current, 30% lower IQ, and integrated SHDN control - making it the only choice for demanding, long-life, multi-rail embedded systems.
Availability
MCP1812BT-020/TT is available at Aetrix Electronics and suitable for energy harvesting systems, wearable medical sensors, and long-life IoT endpoints requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for MCP1812BT-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 with high-reliability silicon and development tools.
The MCP1811/12 family was designed specifically for ultra-low-power, battery-constrained applications - prioritizing nanoscale quiescent current, minimal external components, and robust performance across wide temperature and load ranges.
FAQ
What is the maximum input voltage rating for the MCP1812BT-020/TT?
The MCP1812BT-020/TT has an absolute maximum input voltage rating of +6.0 V. Operation above 5.5 V is not recommended, as the device is specified for reliable performance only within its 1.8 V to 5.5 V input operating range. Exceeding 6.0 V risks permanent damage per the Absolute Maximum Ratings table in DS20006088C.
Does the MCP1812BT-020/TT require an input capacitor?
While the MCP1812BT-020/TT does not mandate an input capacitor for basic stability, Microchip recommends ≥1 µF ceramic (X7R) at the VIN pin to improve transient response and suppress high-frequency noise from upstream sources. The datasheet confirms stability with only COUT, but CIN enhances PSRR and line regulation performance.
How does the output discharge feature operate in the MCP1812BT-020/TT?
In the MCP1812BT-020/TT, the output discharge transistor activates automatically when the SHDN pin is pulled to GND. It provides a 100 Ω (typical) path from VOUT to GND, collapsing the output voltage rapidly - typically within microseconds - to prevent back-powering, floating nodes, or unintended wake-up in downstream circuitry.
Can the MCP1812BT-020/TT be used with a 1.0 µF output capacitor?
No - the MCP1812BT-020/TT requires a minimum 2.2 µF ceramic (X7R) output capacitor for guaranteed stability, as confirmed in Table 1 and Section 4.2 of DS20006088C. Using only 1.0 µF (suitable for MCP1811X) risks oscillation or poor transient response due to insufficient phase margin.
What is the thermal resistance (θJA) of the MCP1812BT-020/TT in its SOT-23 package?
The MCP1812BT-020/TT in the 3-lead SOT-23 package has a 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 standard layout practices; actual thermal performance depends on PCB copper area, vias, and ambient conditions.
MCP1812BT-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
MCP1812BT-020/TT FAQ
1.How can I place an order for MCP1812BT-020/TT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1812BT-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 MCP1812BT-020/TT reliable?
The price and inventory of MCP1812BT-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 MCP1812BT-020/TT is usually 5 days.
3.What payment methods are accepted for MCP1812BT-020/TT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1812BT-020/TT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1812BT-020/TT?
MCP1812BT-020/TT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1812BT-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 MCP1812BT-020/TT?
For technical support, including MCP1812BT-020/TT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1812BT-020/TT requirements.
6.How does Aetrix verify that MCP1812BT-020/TT is sourced from the original manufacturer or authorized distributors?
All MCP1812BT-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 MCP1812BT-020/TT meets industry standards.
7.What is the process for return or replacement of MCP1812BT-020/TT?
All MCP1812BT-020/TT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1812BT-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 MCP1812BT-020/TT part is unused and in its original packaging.
Return procedure for MCP1812BT-020/TT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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