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Microchip Technology MCP1812BT-020/OT
- Part No.:
- MCP1812BT-020/OT
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MCP1812BT-020/OT.pdf
- Description:
- IC REG LINEAR 2V 300MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,114
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Product details
Overview
MCP1812BT-020/OT 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 (5 nA typical ISHDN). It operates from 1.8V to 5.5V input and is stable with only 2.2 µF ceramic output capacitance. Designed for energy harvesting and wearable electronics where battery life exceeds years.
For engineers reviewing the MCP1812BT-020/OT datasheet, MCP1812BT-020/OT pinout, MCP1812BT-020/OT application, or MCP1812BT-020/OT equivalent, this page delivers verified electrical specs, package mapping, functional role in low-power systems, and real-world substitution guidance - all grounded in Microchip's DS20006088C.
Technical Context
The MCP1812BT-020/OT belongs to the MCP1812B variant group: no output discharge, 300 mA output current, and 5 nA typical shutdown current. Its internal error amplifier and PMOS pass device enable ultra-low dropout (400 mV at 300 mA) while maintaining ±25 mV load regulation across 1–300 mA.
It uses a voltage-reference-based feedback loop with overcurrent foldback protection (100 mA at RLOAD = 1 Ω) and integrates a dedicated SHDN pin with 70% VIN logic-high threshold. Thermal performance is specified for SOT-23 (θJA = 211.33°C/W) and UDFN (θJA = 91.05°C/W) packages under JEDEC 4-layer board conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.0 V ±4% - ensures stable rail for 2.0 V logic or analog sensors without external resistors. |
| Max Output Current | 300 mA continuous - supports higher-current peripherals (e.g., BLE radios, display drivers) in compact wearables. |
| Quiescent Current | 250 nA typical - enables >10-year battery life in coin-cell-powered devices operating mostly in sleep mode. |
| Shutdown Current | 5 nA typical - reduces system standby power to near-zero when host MCU asserts SHDN = GND. |
| Dropout Voltage | 400 mV at 300 mA - allows operation down to VIN = 2.4 V, maximizing usable battery voltage range. |
| Stability Capacitance | 2.2 µF ceramic (X7R) - eliminates need for bulky tantalum capacitors, reducing BOM cost and PCB area. |
| 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 (TO-236), RoHS-compliant, moisture sensitivity level 1 (MSL1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input supply voltage | Accepts 1.8–5.5 V; must be decoupled with ≥1 µF ceramic capacitor close to pin. |
| 2 (GND) | Ground reference | Low-impedance return path for regulator ground current only; tie directly to output capacitor ground pad. |
| 3 (VOUT) | Regulated output | Delivers 2.0 V ±4%; requires 2.2 µF X7R ceramic capacitor for stability and low noise. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 250 nA typical enables multi-year operation on CR2032 (225 mAh) at 1 µA average system load. |
| No output discharge | Omits internal discharge transistor - preserves VOUT during shutdown for fast wake-up in always-on sensor nodes. |
| Wide input range | 1.8–5.5 V supports single-cell Li-ion, Li-SOCl₂, alkaline, and energy-harvesting sources without pre-regulation. |
| High PSRR at low frequency | -50 dB at 1 kHz rejects ripple from switching regulators, improving ADC/Sensor accuracy. |
| Thermal protection | Internal thermal shutdown activates above +125°C junction temperature, preventing damage during overload or poor layout. |
Applications
| Energy Harvesting Node | Smart Wearable Sensor |
|---|---|
Use Scenario: Indoor light-harvesting system powering a temperature/humidity sensor node with intermittent BLE transmission. IC Role / Device Role / Timing Role: Primary power regulator converting variable 2.2–4.5 V harvester output to stable 2.0 V for MCU and RF IC. Use Value: 250 nA quiescent current minimizes leakage loss during 99.9% idle time; 300 mA peak supports 20 ms BLE burst without brownout. |
Use Scenario: Compact wrist-worn health monitor with optical heart-rate sensor and accelerometer. IC Role / Device Role / Timing Role: Main 2.0 V supply for analog front-end and low-power MCU, enabled via SHDN by system controller. Use Value: 5 nA shutdown current extends shelf life and storage duration; SOT-23 footprint fits constrained 8 mm × 8 mm PCB area. |
| Hearing Aid Power Management | Long-Life Smart Card |
Use Scenario: Rechargeable hearing aid using microbattery (30–50 mAh) with aggressive duty cycling. IC Role / Device Role / Timing Role: Low-noise 2.0 V regulator for audio codec and MEMS microphone biasing. Use Value: 2.2 µF ceramic stability eliminates ESR-related oscillation risk; -50 dB PSRR prevents audible switching noise coupling into audio path. |
Use Scenario: Contactless smart card with embedded secure element and NFC interface, powered by harvested RF energy. IC Role / Device Role / Timing Role: Ultra-low-power LDO delivering regulated 2.0 V from rectified NFC field (1.8–3.3 V). Use Value: 400 mV dropout allows full utilization of weak RF fields; 250 nA IQ maximizes charge accumulation per RF burst. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1812-2002E/MB | Same 2.0 V output, 300 mA, 5 nA ISHDN, but in 4-lead 1×1 mm UDFN package (exposed thermal pad). | Better thermal performance (θJA = 91°C/W vs. 211°C/W) - preferred for high ambient or sustained 300 mA loads. | Select when PCB space permits smaller footprint and thermal management is critical. |
| Torex XC6210B202MR-G | 2.0 V, 300 mA, 250 nA IQ, but 250 nA ISHDN (not 5 nA); SOT-23-5 with EN and CL discharge pins. | Includes active output discharge (CL pin) - useful for systems requiring rapid VOUT ramp-down between modes. | Select if controlled discharge is required; accept higher shutdown current and extra pin routing. |
Compared with MCP1812BT-020/OT, the UDFN alternative offers superior thermal dissipation in space-constrained designs, while the Torex part trades ultra-low shutdown current for integrated discharge functionality - neither is pin-compatible, but both serve overlapping ultra-low-power LDO use cases.
Availability
MCP1812BT-020/OT is available at Aetrix Electronics and suitable for energy harvesting nodes, wearable medical sensors, and long-life smart cards requiring stable component supply with guaranteed longevity and traceable sourcing.
Supply support for MCP1812BT-020/OT 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 microcontrollers, analog, and Flash-IP solutions, serving automotive, industrial, and consumer markets with high-reliability silicon and design tools.
The MCP1811/12 family was engineered specifically for ultra-low-power battery and energy-harvesting applications - prioritizing nanoscale quiescent current, minimal external components, and robust operation across wide temperature and load ranges.
FAQ
What is the maximum input voltage rating for the MCP1812BT-020/OT?
The MCP1812BT-020/OT has an absolute maximum input voltage of +6.0 V. However, its operational input range is 1.8 V to 5.5 V per datasheet DS20006088C. Exceeding 5.5 V may cause permanent damage or violate safe operating area limits, even briefly.
Does the MCP1812BT-020/OT include output discharge functionality during shutdown?
No, the MCP1812BT-020/OT is a member of the MCP1812B variant group, which omits the internal discharge transistor. This means VOUT remains floating or holds residual charge after SHDN assertion - unlike MCP1812A variants that actively pull VOUT to GND.
Can the MCP1812BT-020/OT operate stably with a 1.0 µF output capacitor?
No. The MCP1812BT-020/OT requires a minimum 2.2 µF ceramic (X7R) output capacitor for guaranteed stability, as confirmed in Table 1-1 and Section 4.2 of DS20006088C. Using 1.0 µF - sufficient for MCP1811X - risks oscillation or poor transient response.
What is the dropout voltage of the MCP1812BT-020/OT at 300 mA load?
The dropout voltage of the MCP1812BT-020/OT is 400 mV typical at 300 mA load and +25°C, defined as the VIN–VOUT differential where VOUT drops 2% below nominal (1.92 V). This value increases slightly at temperature extremes and higher loads.
Is the MCP1812BT-020/OT compatible with lead-free reflow soldering profiles?
Yes, the MCP1812BT-020/OT in SOT-23 packaging is rated for standard lead-free reflow (JEDEC J-STD-020), with peak temperature up to 260°C for 30 seconds. Its MSL1 rating confirms unlimited floor life at ≤30°C/60% RH, eliminating bake requirements before assembly.
MCP1812BT-020/OT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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-23-5
MCP1812BT-020/OT FAQ
1.How can I place an order for MCP1812BT-020/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1812BT-020/OT 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/OT reliable?
The price and inventory of MCP1812BT-020/OT 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/OT is usually 5 days.
3.What payment methods are accepted for MCP1812BT-020/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1812BT-020/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1812BT-020/OT?
MCP1812BT-020/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1812BT-020/OT 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/OT?
For technical support, including MCP1812BT-020/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1812BT-020/OT requirements.
6.How does Aetrix verify that MCP1812BT-020/OT is sourced from the original manufacturer or authorized distributors?
All MCP1812BT-020/OT 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/OT meets industry standards.
7.What is the process for return or replacement of MCP1812BT-020/OT?
All MCP1812BT-020/OT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1812BT-020/OT, 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/OT part is unused and in its original packaging.
Return procedure for MCP1812BT-020/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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