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Microchip Technology MCP1812BT-030/TT
- Part No.:
- MCP1812BT-030/TT
- Manufacturer:
- Microchip Technology
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MCP1812BT-030/TT.pdf
- Description:
- IC REG LINEAR 3V 300MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,210
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Product details
Overview
MCP1812BT-030/TT from Microchip Technology is a 300 mA ultra-low-quiescent-current LDO regulator with fixed 3.0V output, 250 nA typical IQ, and stable operation with 2.2 µF ceramic output capacitor - designed for energy harvesting and long-life battery-powered systems where sleep-mode current minimization is critical.
For engineers reviewing the MCP1812BT-030/TT datasheet, MCP1812BT-030/TT pinout, MCP1812BT-030/TT application, or MCP1812BT-030/TT equivalent, this page delivers verified electrical specs, package mapping to SOT-23-5, shutdown behavior (5 nA ISHDN), dropout voltage at full load (600 mV), and real-world use context in wearable and medical edge devices.
Technical Context
The MCP1812BT-030/TT implements a PMOS pass transistor architecture enabling ultra-low quiescent current (250 nA typ.) while delivering up to 300 mA output. Its internal reference and error amplifier maintain ±4% output accuracy across -40°C to +85°C junction temperature.
It features active output discharge during shutdown (SHDN = GND), foldback current limiting (100 mA at RLOAD = 1 Ω), and operates stably with no ESR requirements on 2.2 µF X7R ceramic output capacitors - eliminating bulk tantalum or aluminum electrolytic solutions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±4% - ensures stable rail for 3.3V-tolerant microcontrollers and sensors without external feedback network. |
| Max Output Current | 300 mA continuous - supports higher-power BLE SoCs or multi-sensor nodes without thermal derating in SOT-23-5. |
| Quiescent Current | 250 nA typical - enables >10-year battery life in coin-cell–powered devices operating >99.9% in sleep mode. |
| Shutdown Current | 5 nA typical (MCP1812B variant) - matches lowest-power system-level wake-up controllers for zero-leakage deep-sleep states. |
| Dropout Voltage | 600 mV max at 300 mA - allows operation down to 3.6V input, compatible with single Li-SOCl₂ or two alkaline cells. |
| Input Voltage Range | 2.4V to 5.5V - accommodates wide input sources including harvested energy (e.g., solar + supercap) and legacy battery chemistries. |
| Output Capacitor | 2.2 µF ceramic (X7R) - reduces BOM count and board area vs. larger electrolytics; enables low-noise <223 µVrms output. |
Pinout & Package
Package: 5-Lead SOT-23 (SC-74A), 2.9 mm × 1.6 mm × 1.1 mm body, exposed thermal pad (EP) for enhanced thermal performance on standard PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VIN | Input supply connection | Accepts 2.4–5.5V input; requires local 1 µF ceramic bypass capacitor near pin for PSRR optimization. |
| 2: SHDN | Active-low enable control | Pulled high internally; logic-low (<20% VIN) disables regulator and activates output discharge switch (DT). |
| 3: NC | No-connect terminal | Internally unconnected; must be left floating or tied to GND per layout guidelines to avoid parasitic coupling. |
| 4: VOUT | Regulated output | Delivers 3.0V ±4%; requires 2.2 µF X7R ceramic capacitor directly at pin for stability and transient response. |
| 5: GND | Power ground reference | Low-impedance return path for load and quiescent current; tie to quiet ground plane adjacent to output capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ (250 nA) | Enables >10-year runtime on CR2032 in devices waking once/hour for sensor readout and BLE broadcast. |
| Output discharge on shutdown | Drains VOUT to GND via 100 Ω internal transistor (RDCH), preventing back-powering of upstream circuitry. |
| Stable with 2.2 µF ceramic COUT | Eliminates need for ESR-stabilizing resistors or large tantalum caps - reduces cost, size, and aging-related failure modes. |
| PSRR >50 dB @ 1 kHz | Maintains clean 3.0V rail despite noisy input sources (e.g., switching boost converters in energy-harvesting harvesters). |
| Foldback current limit | Reduces power dissipation during short-circuit events - limits peak junction temperature rise to safe levels in SOT-23-5. |
Applications
| Wearable Health Monitor | Energy-Harvesting Sensor Node |
|---|---|
Use Scenario: Continuous ECG and motion sensing in wrist-worn patch using CR2032 battery. IC Role / Device Role / Timing Role: Primary 3.0V power rail generator for analog front-end, MCU, and BLE radio during active and sleep cycles. Use Value: 250 nA quiescent current extends battery life beyond 3 years; output discharge prevents leakage into sensor bias networks during sleep. |
Use Scenario: Indoor light-harvesting node powering temperature/humidity sensor and sub-GHz transmitter. IC Role / Device Role / Timing Role: Regulates variable output from amorphous silicon solar cell + supercapacitor storage to stable 3.0V system rail. Use Value: 2.4V minimum input enables regulation down to dim-light conditions; 2.2 µF ceramic stability suits space-constrained PCBs. |
| Smart Medical Implant | Industrial Predictive Maintenance Tag |
Use Scenario: Hearing aid with MEMS microphone, DSP, and wireless telemetry powered by zinc-air battery. IC Role / Device Role / Timing Role: Low-noise 3.0V supply for audio ADC and RF transceiver; shutdown activated between voice capture bursts. Use Value: 5 nA shutdown current eliminates standby drain; <223 µVrms noise ensures SNR >95 dB in analog signal chain. |
Use Scenario: Vibration sensor tag on rotating machinery, powered by piezoelectric harvester and reporting via LoRaWAN. IC Role / Device Role / Timing Role: Provides regulated 3.0V during brief 100-ms measurement/transmit windows; remains in ultra-low-IQ sleep otherwise. Use Value: 600 mV dropout allows full utilization of harvester's decaying voltage profile; foldback protection handles motor-start transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B302MR-G | 300 mA, 3.0V fixed, 250 nA IQ, but no output discharge; SOT-25 package (same pinout as SOT-23-5) | Lacks active VOUT discharge - unsuitable where back-powering of sensors or I²C pull-ups must be avoided during shutdown | Select when output discharge is unnecessary and footprint compatibility is required; verify PSRR (-45 dB @ 1 kHz) meets system noise budget. |
| Ricoh RP114K301D-TR-F | 300 mA, 3.0V fixed, 300 nA IQ, includes discharge, but requires 4.7 µF min COUT and has 800 mV dropout at 300 mA | Higher dropout and larger capacitor requirement reduce usable input range and board area efficiency | Prefer only if AEC-Q200 qualification is mandatory; otherwise MCP1812BT-030/TT offers superior input range and smaller COUT. |
Compared with XC6210B302MR-G and RP114K301D-TR-F, the MCP1812BT-030/TT uniquely combines 5 nA shutdown, integrated output discharge, 600 mV dropout at full load, and 2.2 µF ceramic stability - making it optimal for space- and energy-constrained edge nodes requiring guaranteed rail collapse on disable.
Availability
MCP1812BT-030/TT is available at Aetrix Electronics and suitable for energy harvesting, wearable electronics, and medical device applications requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for MCP1812BT-030/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 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 MCP1812BT-030/TT belongs to Microchip's ultra-low-power LDO family targeting battery- and harvester-powered edge devices - engineered to minimize system-level sleep current while maintaining robust transient response and rail integrity.
FAQ
What is the maximum input voltage rating for the MCP1812BT-030/TT?
The MCP1812BT-030/TT has an absolute maximum input voltage rating of +6.0V. However, its operational input range is specified from 2.4V to 5.5V for 300 mA output capability. Exceeding 5.5V may cause excessive power dissipation or violate thermal limits in the SOT-23-5 package, even if within absolute maximum ratings.
Does the MCP1812BT-030/TT require an external resistor divider for output voltage setting?
No - the MCP1812BT-030/TT is a fixed-output LDO with factory-trimmed 3.0V regulation. It contains no feedback pins or external resistor connections. The "T" suffix in the part number denotes tape-and-reel packaging, not programmability; output voltage cannot be adjusted externally.
Is the NC pin on the MCP1812BT-030/TT safe to connect to ground?
Yes - the NC (pin 3) is internally unconnected and may be tied to GND without affecting operation. Microchip recommends grounding NC pins in SOT-23-5 layouts to reduce potential noise coupling and improve mechanical stability during reflow, provided no routing conflicts exist.
How does the output discharge function behave during shutdown of the MCP1812BT-030/TT?
When SHDN is pulled low, the MCP1812BT-030/TT activates an internal discharge transistor (RDCH ≈ 100 Ω) between VOUT and GND, discharging the output capacitor to <100 mV within ~1 ms under typical 2.2 µF loading. This prevents unintended back-powering of upstream circuitry or I/O leakage paths.
Can the MCP1812BT-030/TT operate with a 1 µF output capacitor instead of the recommended 2.2 µF?
No - the MCP1812BT-030/TT requires a minimum 2.2 µF ceramic output capacitor for stability, as confirmed in DS20006088C. Using 1 µF risks oscillation or poor transient response, especially at full 300 mA load. The 2.2 µF value is validated across temperature and process corners for this 300 mA variant (MCP1812X).
MCP1812BT-030/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):
- 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-23-3
MCP1812BT-030/TT FAQ
1.How can I place an order for MCP1812BT-030/TT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1812BT-030/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-030/TT reliable?
The price and inventory of MCP1812BT-030/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-030/TT is usually 5 days.
3.What payment methods are accepted for MCP1812BT-030/TT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1812BT-030/TT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1812BT-030/TT?
MCP1812BT-030/TT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1812BT-030/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-030/TT?
For technical support, including MCP1812BT-030/TT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1812BT-030/TT requirements.
6.How does Aetrix verify that MCP1812BT-030/TT is sourced from the original manufacturer or authorized distributors?
All MCP1812BT-030/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-030/TT meets industry standards.
7.What is the process for return or replacement of MCP1812BT-030/TT?
All MCP1812BT-030/TT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1812BT-030/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-030/TT part is unused and in its original packaging.
Return procedure for MCP1812BT-030/TT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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