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Microchip Technology MCP1812BT-030/OT
- Part No.:
- MCP1812BT-030/OT
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MCP1812BT-030/OT.pdf
- Description:
- IC REG LINEAR 3V 300MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,796
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Product details
Overview
MCP1812BT-030/OT from Microchip Technology is a 300 mA ultra-low-quiescent-current LDO regulator with fixed 3.0V output, 250 nA typical operating current, and 5 nA shutdown current (MCP1812B variant). It operates from 1.8V to 5.5V input, supports ceramic output capacitors ≥2.2 µF, and delivers stable low-noise power for battery-constrained systems such as hearing aids and smart wearables.
For engineers reviewing the MCP1812BT-030/OT datasheet, MCP1812BT-030/OT pinout, MCP1812BT-030/OT application, or MCP1812BT-030/OT equivalent, key selection criteria include its 300 mA output capability, 400 mV dropout at full load, output discharge functionality (absent in B-variant), and compatibility with 3-lead SOT-23 packaging for space-constrained PCB layouts.
Technical Context
The MCP1812BT-030/OT implements a PMOS pass transistor architecture enabling ultra-low quiescent current while maintaining fast transient response and high PSRR (>50 dB at 1 kHz). Its internal error amplifier and reference are optimized for operation across –40°C to +85°C junction temperature with minimal load/line regulation drift.
As a member of the MCP1812B series, it omits the output discharge transistor (DT) present in MCP1812A variants-confirmed by device designation "B" and absence of discharge function in electrical specs-making it suitable for applications where controlled VOUT decay during shutdown is not required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±4% - ensures stable supply for 3.3V-tolerant logic without external feedback network |
| Max Output Current | 300 mA - sufficient to power microcontrollers, sensors, and RF transceivers in compact portable devices |
| Quiescent Current | 250 nA typical - enables multi-year battery life in energy-harvesting and coin-cell-powered applications |
| Shutdown Current | 5 nA typical - minimizes leakage during deep-sleep modes in wearable electronics |
| Dropout Voltage | 400 mV max at 300 mA - allows operation down to 3.4V input when regulating 3.0V output |
| Stability Capacitor | 2.2 µF ceramic (X7R) - reduces solution size/cost vs. tantalum and lowers output noise |
| PSRR | –50 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters |
Pinout & Package
Package: 3-Lead SOT-23 - surface-mount, low-profile (1.3 mm height), JEDEC-standard footprint compatible with automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input voltage supply | Accepts 1.8V–5.5V; requires local 1 µF ceramic bypass capacitor for stability |
| VOUT | Regulated output | Delivers fixed 3.0V; must connect ≥2.2 µF ceramic capacitor directly to GND |
| GND | Ground reference | Low-impedance return path for regulator core; tie to quiet ground plane near output capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 250 nA typical operating current enables >10-year shelf life on CR2032 batteries in always-on sensors |
| No output discharge | Omits DT transistor (MCP1812B variant), eliminating uncontrolled VOUT collapse during shutdown-critical for systems requiring hold-up time |
| Ceramic capacitor stability | Stable with 2.2 µF X7R MLCC - avoids ESR sensitivity and reduces board area vs. electrolytic solutions |
| Wide input range | 1.8V–5.5V operation supports single-cell Li-ion, two-cell alkaline, or USB-powered designs without pre-regulation |
| Overcurrent protection | Foldback current limit (100 mA at RLOAD = 1 Ω) prevents thermal runaway during short-circuit events |
Applications
| Energy Harvesting Systems | Wearable Medical Devices |
|---|---|
Use Scenario: Powering wireless sensor nodes powered by piezoelectric or solar harvesters with intermittent, low-energy input. IC Role / Device Role / Timing Role: Primary voltage regulator converting variable harvester output to stable 3.0V rail for ultra-low-power MCU and BLE radio. Use Value: 250 nA quiescent current ensures >95% of harvested energy reaches the load-even during long idle periods between transmissions. | Use Scenario: Continuous glucose monitors and digital hearing aids requiring multi-year operation from miniature batteries. IC Role / Device Role / Timing Role: Main power supply for analog front-end, ADC, and DSP core-maintaining precision under varying load conditions. Use Value: 400 mV dropout at 300 mA allows full utilization of battery voltage down to 3.4V, extending usable capacity by ~12% vs. higher-dropout regulators. |
| Smart Card Readers | Industrial IoT Edge Sensors |
Use Scenario: Contactless smart card interfaces in access control terminals powered by 3.3V system rails with tight noise budgets. IC Role / Device Role / Timing Role: Local LDO supplying clean 3.0V to NFC controller IC and secure element-rejecting digital switching noise from host processor. Use Value: –50 dB PSRR at 1 kHz attenuates high-frequency noise from shared 3.3V bus, preventing RF desense and data corruption. | Use Scenario: Battery-operated vibration or temperature sensors deployed in remote industrial locations with 10+ year maintenance cycles. IC Role / Device Role / Timing Role: Power management unit delivering regulated 3.0V to low-power MCU, MEMS sensor, and LoRaWAN transceiver during periodic wake-up bursts. Use Value: 5 nA shutdown current ensures <1 µAh/year standby drain-enabling CR123A battery life exceeding 15 years at 10-second wake intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1812-3002E/OT | Same 300 mA rating and 3.0V output, but in 5-lead SOT-23 with SHDN pin; includes output discharge (A-variant) | Requires active enable control and supports rapid VOUT discharge-suited for systems needing deterministic power-down sequencing | Select when board layout accommodates 5-pin package and discharge behavior is required for system-level safety or reset timing |
| Torex XC6210B302MR-G | 300 mA, 3.0V, 250 nA IQ, but uses N-channel pass device-higher dropout (~600 mV at 300 mA) and no shutdown mode | Lacks enable/shutdown function; less suitable for duty-cycled applications requiring nanoamp sleep states | Choose only if pin count and cost are primary constraints and shutdown functionality is unnecessary |
Compared with MCP1812-3002E/OT, the MCP1812BT-030/OT saves one PCB pad and eliminates discharge-related voltage transients, while versus XC6210B302MR-G it delivers superior dropout performance and guaranteed 5 nA shutdown-critical for multi-year battery life in intermittently active systems.
Availability
MCP1812BT-030/OT is available at Aetrix Electronics and suitable for energy harvesting systems, wearable medical devices, and industrial IoT edge sensors requiring stable component supply with guaranteed long-term availability.
Supply support for MCP1812BT-030/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 is a leading provider of microcontroller, analog, FPGA, and connectivity solutions, serving automotive, industrial, consumer, and communications markets with vertically integrated silicon and software platforms.
The MCP1811/12 family was designed specifically for ultra-low-power, long-life battery applications-emphasizing nanoscale quiescent current, ceramic-capacitor compatibility, and robust operation across extended temperature ranges.
FAQ
What is the maximum input voltage rating for the MCP1812BT-030/OT?
The MCP1812BT-030/OT has an absolute maximum input voltage rating of +6.0V. However, its specified operating input range is 1.8V to 5.5V. Exceeding 5.5V may cause permanent damage or violate reliability specifications-even briefly-so system design must ensure VIN remains within this operational window under all conditions including transients and ripple.
Does the MCP1812BT-030/OT include an enable/shutdown pin?
No, the MCP1812BT-030/OT does not include a shutdown (SHDN) pin. It is a 3-lead SOT-23 device with only VIN, VOUT, and GND terminals. The "B" suffix confirms it belongs to the no-shutdown variant-unlike 5-lead versions such as MCP1812-3002E/OT. Power control must be implemented externally via input rail switching.
What output capacitor value is required for stability with the MCP1812BT-030/OT?
The MCP1812BT-030/OT requires a minimum 2.2 µF X7R ceramic output capacitor placed directly between VOUT and GND. This value is mandatory for stability across the full 300 mA load range and temperature extremes. Using smaller or non-ceramic capacitors risks oscillation, poor transient response, or failure to regulate under dynamic loads.
Is the MCP1812BT-030/OT RoHS compliant and halogen-free?
Yes, the MCP1812BT-030/OT is RoHS compliant and halogen-free per Microchip's standard product definitions. It meets J-STD-609 Category 1 for bromine/chlorine content and adheres to EU Directive 2011/65/EU. Full compliance documentation-including test reports and declarations-is available through Microchip's quality portal using the official part number MCP1812BT-030/OT.
How does the dropout voltage of the MCP1812BT-030/OT vary with load current?
The dropout voltage of the MCP1812BT-030/OT increases with load current: it is typically 400 mV at 300 mA and remains below 600 mV across the full operating range. This relationship is confirmed in Figure 2-9 through 2-11 of the datasheet, showing monotonic rise from ~100 mV at 10 mA to 400–500 mV at 300 mA, enabling predictable minimum input voltage calculation (VIN ≥ 3.0V + VDROPOUT).
MCP1812BT-030/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):
- 3V
- 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-030/OT FAQ
1.How can I place an order for MCP1812BT-030/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1812BT-030/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-030/OT reliable?
The price and inventory of MCP1812BT-030/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-030/OT is usually 5 days.
3.What payment methods are accepted for MCP1812BT-030/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1812BT-030/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1812BT-030/OT?
MCP1812BT-030/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1812BT-030/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-030/OT?
For technical support, including MCP1812BT-030/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1812BT-030/OT requirements.
6.How does Aetrix verify that MCP1812BT-030/OT is sourced from the original manufacturer or authorized distributors?
All MCP1812BT-030/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-030/OT meets industry standards.
7.What is the process for return or replacement of MCP1812BT-030/OT?
All MCP1812BT-030/OT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1812BT-030/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-030/OT part is unused and in its original packaging.
Return procedure for MCP1812BT-030/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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