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Microchip Technology MCP1812BT-030/LT
- Part No.:
- MCP1812BT-030/LT
- Manufacturer:
- Microchip Technology
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MCP1812BT-030/LT.pdf
- Description:
- IC REG LINEAR 3V 300MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,555
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Product details
Overview
MCP1812BT-030/LT from Microchip Technology is a 300 mA ultra-low quiescent current (250 nA typical) fixed 3.0 V output LDO linear regulator in a 3-lead SOT-23 package, designed for energy harvesting and long-life battery-powered systems requiring stable low-noise voltage regulation with ceramic capacitor support (2.2 µF).
For engineers reviewing the MCP1812BT-030/LT datasheet, MCP1812BT-030/LT pinout, MCP1812BT-030/LT application, or MCP1812BT-030/LT 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 differences.
Technical Context
The MCP1812BT-030/LT implements a CMOS-based LDO architecture with integrated output discharge transistor (MCP1812A variant), enabling rapid VOUT collapse during shutdown (SHDN = GND). Its ultra-low 250 nA operating IQ and 10 nA typical shutdown current are achieved via optimized biasing and gate-controlled pass device control.
It operates across 1.8V–5.5V input range with 400 mV typical dropout at 300 mA load, supports stable regulation with only 2.2 µF ceramic output capacitance, and includes overcurrent protection plus ±25 mV load regulation over full 1–300 mA range at 3.0 V output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0 V ±4% - ensures compatibility with 3.0 V logic rails and sensors without external feedback network. |
| Max Output Current | 300 mA - sufficient to power microcontrollers, RF transceivers, or sensor arrays in compact wearable or medical devices. |
| Quiescent Current | 250 nA typical - enables multi-year operation on coin-cell batteries in sleep-dominated duty cycles. |
| Shutdown Current | 10 nA typical - minimizes leakage drain during extended system hibernation, critical for energy harvesting storage buffers. |
| Dropout Voltage | 400 mV typical at 300 mA - allows regulation down to VIN = 3.4 V, maximizing usable battery voltage range. |
| Output Capacitor | 2.2 µF ceramic (X7R) - enables small footprint, low ESR, low noise performance without tantalum or electrolytic alternatives. |
| 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 (SC-59), JEDEC MO-178AA, 2.92 mm × 1.3 mm × 1.0 mm body, exposed pad not present.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 1.8–5.5 V input; requires local 1 µF ceramic bypass capacitor to minimize high-frequency noise coupling. |
| VOUT | Regulated output | Delivers fixed 3.0 V; must be decoupled with ≥2.2 µF X7R ceramic capacitor placed adjacent to pin for stability and transient response. |
| GND | Ground reference | Low-impedance return path for load and internal circuitry; connects directly to output capacitor ground terminal to reduce PSRR degradation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ operation | 250 nA typical enables >10-year shelf life on CR2032 when powering sub-µA sleep-mode loads. |
| Integrated output discharge | Active discharge path (RDCH ≈ 100 Ω) collapses VOUT within microseconds upon SHDN assertion, preventing back-powering of upstream circuits. |
| Ceramic capacitor stability | Stable with 2.2 µF X7R ceramic only - eliminates need for larger, less reliable, higher-ESR tantalum capacitors and reduces BOM count. |
| Overcurrent protection | Foldback current limit (100 mA at RLOAD = 1 Ω) prevents thermal runaway during short-circuit events without latch-up. |
| Wide temperature range | -40°C to +85°C operating junction range supports deployment in outdoor wearables and industrial edge sensors. |
Applications
| Energy Harvesting Node | Smart Wearable Sensor Hub |
|---|---|
Use Scenario: Powering BLE SoC and analog front-end from thermoelectric or piezoelectric harvester with intermittent microwatt-level output. IC Role / Device Role / Timing Role: Primary voltage regulator providing clean, low-noise 3.0 V rail during burst-mode operation and deep-sleep intervals. Use Value: 250 nA IQ extends usable harvest time per cycle; 2.2 µF ceramic support simplifies PCB layout in space-constrained modules. |
Use Scenario: Supplying accelerometer, optical heart-rate sensor, and NFC interface in wrist-worn health monitor. IC Role / Device Role / Timing Role: System LDO delivering regulated 3.0 V to mixed-signal peripherals while maintaining tight load regulation (<±50 mV) across dynamic current steps. Use Value: 300 mA capability handles peak transmit currents; output discharge prevents sensor bias leakage during standby. |
| Hearing Aid Audio Subsystem | Long-Life IoT Edge Node |
Use Scenario: Powering ultra-low-noise op-amps and ADCs in miniature hearing aid amplifiers powered by zinc-air battery. IC Role / Device Role / Timing Role: Low-noise LDO supplying analog signal chain with <223 µVrms integrated noise (10 Hz–100 kHz) at 2.5 V output variant. Use Value: -50 dB PSRR at 1 kHz rejects switching noise from companion DC/DC; 400 mV dropout preserves battery runtime down to 3.4 V. |
Use Scenario: Regulating power for LoRaWAN node deployed in remote infrastructure with 10+ year maintenance-free requirement. IC Role / Device Role / Timing Role: Primary regulator enabling years of operation on primary lithium thionyl chloride cell via 10 nA shutdown current. Use Value: Confirmed 125°C max junction rating supports high-temperature deployments; JEDEC-compliant thermal resistance (θJA = 211.33°C/W) ensures reliability on standard FR4. |
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/MB | Same 3.0 V output, 300 mA, 250 nA IQ, but in 4-lead 1×1 mm UDFN with exposed thermal pad; no output discharge. | Higher power density and better thermal performance (θJA = 91.05°C/W), but requires rework for solder paste stencil and no discharge function. | Select when board space is constrained and thermal dissipation >150 mW is expected; avoid if fast VOUT discharge is required. |
| Torex XC6210B302MR-G | 3.0 V, 300 mA, 250 nA IQ, SOT-25 package; includes enable pin but no output discharge; ±2% output tolerance vs. ±4%. | Superior initial accuracy and tighter load regulation (±15 mV), but lacks integrated discharge and has higher minimum input voltage (2.0 V). | Select when precision output voltage and minimal load variation are prioritized over discharge functionality and lowest possible VIN. |
Compared with MCP1812BT-030/LT, the UDFN-packaged MCP1812-3002E/MB offers superior thermal management but sacrifices output discharge, while the Torex XC6210B302MR-G provides tighter output accuracy and regulation at the cost of higher minimum input voltage and no discharge path-making MCP1812BT-030/LT optimal for space-constrained, discharge-critical, ultra-low-VIN battery systems.
Availability
MCP1812BT-030/LT is available at Aetrix Electronics and suitable for energy harvesting nodes, smart wearable sensor hubs, and long-life IoT edge nodes requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for MCP1812BT-030/LT 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, analog, FPGA, and timing solutions, serving automotive, industrial, communications, and consumer markets with high-reliability silicon and development tools.
The MCP1811/12 family was designed specifically for ultra-low-power, long-life battery and energy harvesting applications-emphasizing nanowatt IQ, ceramic capacitor compatibility, and robust shutdown behavior in miniature packages.
FAQ
What is the maximum input voltage rating for the MCP1812BT-030/LT?
The MCP1812BT-030/LT has an absolute maximum input voltage rating of +6.0 V. Operation above 5.5 V is not recommended, as the specified input operating range is 1.8 V to 5.5 V. Exceeding 6.0 V may cause permanent damage to the device, per DS20006088C-page 4 Absolute Maximum Ratings.
Does the MCP1812BT-030/LT include output discharge functionality?
Yes, the MCP1812BT-030/LT is an MCP1812A variant and includes an integrated discharge transistor (RDCH ≈ 100 Ω) that actively pulls VOUT to GND when SHDN is driven low. This feature is confirmed in Table 1 and Figure 1-1 of DS20006088C, distinguishing it from MCP1812B variants.
What is the minimum output capacitance required for stability with the MCP1812BT-030/LT?
The MCP1812BT-030/LT requires a minimum of 2.2 µF ceramic (X7R) output capacitance for guaranteed stability, as specified in the Features section and Electrical Characteristics table (DS20006088C-page 1 and page 4). Using less than 2.2 µF risks oscillation or poor transient response.
Can the MCP1812BT-030/LT operate from a 1.8 V input while delivering 3.0 V output?
No. The MCP1812BT-030/LT cannot regulate 3.0 V output from a 1.8 V input due to dropout voltage requirements. At 300 mA load, typical dropout is 400 mV, so minimum valid VIN is 3.4 V. The 1.8 V minimum input applies only to lower-output-voltage variants (e.g., 1.0 V or 1.2 V parts) in the same family.
Is the MCP1812BT-030/LT RoHS compliant and lead-free?
Yes, the MCP1812BT-030/LT is RoHS compliant and lead-free, as confirmed by Microchip's official packaging and compliance documentation (e.g., "/LT" suffix denotes lead-free, halogen-free, and RoHS-compliant SOT-23 packaging per Microchip packaging standards).
MCP1812BT-030/LT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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:
- SC-70-5
MCP1812BT-030/LT FAQ
1.How can I place an order for MCP1812BT-030/LT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1812BT-030/LT 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/LT reliable?
The price and inventory of MCP1812BT-030/LT 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/LT is usually 5 days.
3.What payment methods are accepted for MCP1812BT-030/LT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1812BT-030/LT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1812BT-030/LT?
MCP1812BT-030/LT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1812BT-030/LT 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/LT?
For technical support, including MCP1812BT-030/LT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1812BT-030/LT requirements.
6.How does Aetrix verify that MCP1812BT-030/LT is sourced from the original manufacturer or authorized distributors?
All MCP1812BT-030/LT 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/LT meets industry standards.
7.What is the process for return or replacement of MCP1812BT-030/LT?
All MCP1812BT-030/LT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1812BT-030/LT, 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/LT part is unused and in its original packaging.
Return procedure for MCP1812BT-030/LT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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