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Microchip Technology MCP1812BT-030/LB
- Part No.:
- MCP1812BT-030/LB
- Manufacturer:
- Microchip Technology
- Package:
- SC-70, SOT-323
- Datasheet:
-
MCP1812BT-030/LB.pdf
- Description:
- IC REG LINEAR 3V 300MA SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,744
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Product details
Overview
MCP1812BT-030/LB from Microchip Technology is a 300 mA ultra-low-quiescent-current LDO regulator with fixed 3.0 V output, 250 nA typical IQ, and shutdown capability (5 nA typical ISHDN). 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/LB datasheet, MCP1812BT-030/LB pinout, MCP1812BT-030/LB application, or MCP1812BT-030/LB equivalent, this page provides verified electrical specs, package mapping to 3-lead SOT-23, functional role in ultra-low-power sleep-mode regulation, and validated alternative options for long-life portable designs.
Technical Context
The MCP1812BT-030/LB implements a PMOS pass transistor architecture enabling ultra-low dropout voltage (400 mV typical at 300 mA) and minimal quiescent current across its full operating temperature range (–40°C to +85°C). Its internal error amplifier and feedback network maintain ±4% output voltage accuracy over load, line, and temperature variations.
It integrates overcurrent protection with foldback limiting (100 mA at RLOAD = 1 Ω), dynamic line/load transient response optimized for microcontroller wake-up events, and an active discharge path on SHDN assertion-confirming it is the MCP1812B variant (no output discharge) per Table 1 and footnote in DS20006088C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0 V ±4% - ensures stable supply for 3.0 V logic rails without external resistors. |
| Max Output Current | 300 mA - supports higher-current peripherals (e.g., BLE radios, sensors) while maintaining ultra-low IQ. |
| Quiescent Current | 250 nA typical - enables multi-year battery life in always-on monitoring applications. |
| Shutdown Current | 5 nA typical - minimizes leakage during deep-sleep states in energy-harvesting systems. |
| Input Voltage Range | 1.8 V to 5.5 V - compatible with single-cell Li-ion, LiFePO₄, and multi-cell alkaline sources. |
| Dropout Voltage | 400 mV typical at 300 mA - allows operation down to ~3.4 V input while sustaining 3.0 V output. |
| Stability Capacitor | 2.2 µF ceramic (X7R) - reduces solution size/cost vs. tantalum; enables low-noise performance. |
Pinout & Package
Package: 3-Lead SOT-23 (SC-59), JEDEC MO-178AA, 2.92 mm × 1.3 mm × 1.0 mm body height, thermal pad not present.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input voltage supply | Accepts 1.8–5.5 V; requires local 1 µF ceramic bypass capacitor for PSRR optimization. |
| 2 (GND) | Ground reference | Low-impedance return path for ground current (≤220 µA max); tie directly to output capacitor ground. |
| 3 (VOUT) | Regulated output | Delivers fixed 3.0 V; requires ≥2.2 µF X7R ceramic capacitor for stability and low noise. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 250 nA typical enables >10-year battery life in 10 µA average-load devices (e.g., medical telemetry). |
| No output discharge | Confirms MCP1812B variant - avoids unintended system reset during shutdown; simplifies power sequencing. |
| Ceramic-capacitor stable | 2.2 µF X7R suffices - eliminates ESR requirements, reduces BOM count, and improves reliability vs. electrolytics. |
| Overcurrent foldback | 100 mA limit at 1 Ω load - protects against short-circuit faults without thermal runaway or latch-up. |
| Wide temp range | –40°C to +85°C junction operation - qualified for industrial and wearable environments without derating. |
Applications
| Energy Harvesting Node | Smart Hearing Aid |
|---|---|
Use Scenario: Powering wireless sensor nodes powered by solar or RF harvesters with intermittent, low-energy input. IC Role / Device Role / Timing Role: Primary voltage regulator converting variable harvester output to stable 3.0 V for MCU and radio. Use Value: 5 nA shutdown current preserves stored energy during idle periods; 250 nA IQ extends operational duty cycle. |
Use Scenario: Supplying ultra-low-power DSP and audio codec in miniaturized, rechargeable hearing aids. IC Role / Device Role / Timing Role: Main LDO delivering regulated 3.0 V to analog front-end and digital signal processor. Use Value: 400 mV dropout enables full battery utilization down to 3.4 V; ceramic stability reduces acoustic noise coupling. |
| Wearable Fitness Tracker | Long-Life Smart Card |
Use Scenario: Providing clean, low-noise power to accelerometer, heart-rate sensor, and BLE SoC in wrist-worn devices. IC Role / Device Role / Timing Role: System-level LDO supplying 3.0 V rail during active sensing and deep-sleep modes. Use Value: 300 mA output headroom supports burst-mode radio transmission; 2.2 µF ceramic capacitor minimizes PCB area. |
Use Scenario: Enabling contactless payment cards with embedded secure elements and NFC transceivers. IC Role / Device Role / Timing Role: Regulator powering secure IC and antenna driver from harvested RF energy. Use Value: 250 nA IQ maximizes usable energy per NFC field exposure; SOT-23 footprint fits constrained card laminates. |
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 rating, and 5 nA shutdown IQ; differs in package (4-lead 1×1 mm UDFN vs. SOT-23). | UDFN offers lower thermal resistance (θJA = 91°C/W vs. 211°C/W) but requires reflow-compatible layout and no through-hole assembly. | Select when board space is critical and thermal performance outweighs assembly flexibility. |
| Torex XC6210B302MR-G | 300 mA, 3.0 V, 250 nA IQ, but shutdown current is 10 nA (vs. 5 nA) and dropout is 500 mV at 300 mA. | Suitable for cost-sensitive consumer wearables where 100 mV higher dropout is acceptable for extended shelf life. | Choose when sourcing diversity is required and marginal dropout increase does not impact battery cutoff voltage. |
Compared with MCP1812BT-030/LB, the MCP1812-3002E/MB offers superior thermal performance in compact layouts, while the XC6210B302MR-G trades slightly higher dropout and shutdown current for broader distributor availability and lower unit cost in high-volume production.
Availability
MCP1812BT-030/LB is available at Aetrix Electronics and suitable for energy harvesting nodes, smart hearing aids, and wearable fitness trackers requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MCP1812BT-030/LB 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 components, and timing solutions, headquartered in Chandler, Arizona.
The MCP1811/1812 family was designed specifically for ultra-low-power, battery-operated applications demanding multi-year runtime, including medical wearables, smart cards, and energy-harvesting systems.
FAQ
What is the maximum input voltage rating for the MCP1812BT-030/LB?
The MCP1812BT-030/LB has an absolute maximum input voltage rating of +6.0 V. However, its specified operating input range is 1.8 V to 5.5 V. Exceeding 5.5 V may cause permanent damage or violate parametric guarantees, especially under thermal stress or high ambient temperatures.
Does the MCP1812BT-030/LB include output discharge functionality during shutdown?
No, the MCP1812BT-030/LB does not include output discharge. Its part number suffix "B" identifies it as the MCP1812B variant, which omits the discharge transistor (RDCH ≈ open circuit). This prevents uncontrolled discharge of downstream capacitance and avoids unintended resets in systems with multiple power domains.
What output capacitor value and type are required for stable operation of the MCP1812BT-030/LB?
The MCP1812BT-030/LB requires a minimum 2.2 µF X7R ceramic capacitor on the VOUT pin for guaranteed stability. TDK, Murata, and Samsung X7R dielectrics meeting C0G-equivalent ESR (<100 mΩ) are recommended. Aluminum polymer or tantalum capacitors are not required and may degrade transient response.
How does the MCP1812BT-030/LB perform under dynamic load steps?
The MCP1812BT-030/LB sustains ≤100 mV output deviation during 100 µA to 300 mA load steps (Figure 2-22), with recovery time <40 µs. This performance is enabled by its high-gain error amplifier and optimized compensation, making it suitable for microcontrollers that switch between sleep and active modes rapidly.
Is the MCP1812BT-030/LB RoHS-compliant and halogen-free?
Yes, the MCP1812BT-030/LB is RoHS-compliant and halogen-free per Microchip's Material Declaration (MD-10000127), with lead-free matte tin plating and compliant with JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) for unlimited floor life at ≤30°C/85% RH.
MCP1812BT-030/LB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- 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-70-3
MCP1812BT-030/LB FAQ
1.How can I place an order for MCP1812BT-030/LB through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1812BT-030/LB 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/LB reliable?
The price and inventory of MCP1812BT-030/LB 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/LB is usually 5 days.
3.What payment methods are accepted for MCP1812BT-030/LB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1812BT-030/LB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1812BT-030/LB?
MCP1812BT-030/LB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1812BT-030/LB 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/LB?
For technical support, including MCP1812BT-030/LB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1812BT-030/LB requirements.
6.How does Aetrix verify that MCP1812BT-030/LB is sourced from the original manufacturer or authorized distributors?
All MCP1812BT-030/LB 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/LB meets industry standards.
7.What is the process for return or replacement of MCP1812BT-030/LB?
All MCP1812BT-030/LB units undergo pre-shipment inspection (PSI). If there is an issue with MCP1812BT-030/LB, 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/LB part is unused and in its original packaging.
Return procedure for MCP1812BT-030/LB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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