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Microchip Technology MCP1812AT-010/OT
- Part No.:
- MCP1812AT-010/OT
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MCP1812AT-010/OT.pdf
- Description:
- IC REG LINEAR 1V 300MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,194
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Product details
Overview
MCP1812AT-010/OT from Microchip Technology is a 300 mA ultra-low quiescent current (250 nA typical) fixed-output 1.0 V low-dropout linear regulator in SOT-23-3 package, featuring output discharge during shutdown and stable operation with only 2.2 µF ceramic output capacitance - designed for energy harvesting and long-life battery-powered medical wearables.
For engineers reviewing the MCP1812AT-010/OT datasheet, MCP1812AT-010/OT pinout, MCP1812AT-010/OT application, or MCP1812AT-010/OT equivalent, this page delivers verified electrical specs, thermal performance data, shutdown behavior, dropout voltage at full load, and real-world use cases in ultra-low-power systems where sleep-mode current budget is critical.
Technical Context
The MCP1812AT-010/OT implements a PMOS pass transistor architecture enabling ultra-low IQ (250 nA typ.) while delivering up to 300 mA output current. Its internal reference and error amplifier maintain ±4% output voltage accuracy across -40°C to +85°C junction temperature.
It integrates an active discharge transistor (RDCH = 100 Ω typ.) that pulls VOUT to GND when SHDN = GND, preventing residual voltage hold-up. Input voltage range is 2.4 V to 5.5 V at full 300 mA load, with dropout voltage specified at 400–600 mV under those conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.0 V ±4% - ensures stable core supply for ultra-low-voltage MCUs and sensors without external feedback. |
| Max Output Current | 300 mA - supports higher-current peripherals (e.g., BLE radios, display drivers) in compact wearable designs. |
| Quiescent Current | 250 nA typical - enables multi-year battery life in devices operating >99.9% in sleep mode (e.g., environmental sensors). |
| Shutdown Current | 10 nA typical - reduces system standby power to near-zero when disabled via SHDN pin. |
| Dropout Voltage | 400–600 mV at 300 mA - allows operation from single-cell Li-ion (3.0 V min) or two alkaline cells (2.4 V min) down to end-of-life. |
| Stability Capacitor | 2.2 µF ceramic (X7R) - eliminates need for bulky tantalum capacitors, reducing board area and cost in space-constrained modules. |
| PSRR | -50 dB at 1 kHz - suppresses ripple from noisy switching supplies feeding the LDO input, preserving analog sensor accuracy. |
Pinout & Package
Package: SOT-23-3 (JEDEC MO-178AA), 2.92 mm × 1.3 mm × 1.0 mm, thermally enhanced with exposed pad (not electrically connected in this variant).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Supply | Accepts 2.4–5.5 V DC; requires local 1 µF ceramic bypass capacitor to minimize high-frequency noise coupling. |
| 2 (GND) | Ground Reference | Low-impedance return path for both input and output currents; must connect directly to quiet ground plane near output capacitor. |
| 3 (VOUT) | Regulated Output | Delivers fixed 1.0 V; requires ≥2.2 µF X7R ceramic capacitor placed within 2 mm for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Output Discharge on Shutdown | Active NMOS discharge switch (RDCH = 100 Ω) pulls VOUT to GND within microseconds - prevents back-powering of upstream circuitry. |
| Ultra-Low IQ Architecture | 250 nA typical quiescent current maintained across full input voltage range (2.4–5.5 V) and temperature (-40°C to +85°C). |
| Ceramic-Capacitor Stability | Guaranteed stable with 2.2 µF X7R ceramic output cap - eliminates ESR requirements and simplifies BOM vs. electrolytic/tantalum solutions. |
| Overcurrent Protection | Foldback current limit (100 mA typ. at RLOAD = 1 Ω) prevents thermal runaway during short-circuit events without latch-up. |
| Wide Input Range Support | Operates from 2.4 V (min for 300 mA load) to 5.5 V - compatible with single Li-ion, dual alkaline, or regulated 3.3/5 V rails. |
Applications
| Energy Harvesting Node | Medical Hearing Aid |
|---|---|
|
Use Scenario: Indoor light-harvesting sensor node powered by amorphous silicon PV cell (<50 µW avg. output) with supercapacitor buffer. IC Role / Device Role: Primary voltage regulator supplying 1.0 V to ultra-low-power MCU and RF transceiver during intermittent wake cycles. Use Value: 250 nA IQ enables >3 years runtime on 100 mF supercapacitor charged by 10 µW average harvest - no battery replacement needed. |
Use Scenario: Rechargeable hearing aid using coin-cell battery with 5-year target service life and daily Bluetooth LE streaming. IC Role / Device Role: Core power rail regulator for DSP and MEMS microphone, activated only during audio processing bursts. Use Value: 10 nA shutdown current minimizes self-discharge during 23 hrs/day sleep mode - extends usable battery capacity by 18% vs. 1 µA alternatives. |
| Smart Wearable Watch | Implantable Diagnostic Patch |
|
Use Scenario: Optical heart-rate monitor worn 24/7, sampling PPG every 2 sec with 10 ms active window. IC Role / Device Role: Dedicated 1.0 V supply for analog front-end and ADC, isolated from noisy digital domain. Use Value: -50 dB PSRR at 1 kHz rejects switching noise from nearby buck converter - maintains <1 LSB ADC error in 16-bit measurements. |
Use Scenario: Subcutaneous glucose monitoring patch with 90-day wear requirement and wireless telemetry. IC Role / Device Role: Regulator for ultra-low-noise biosignal amplifier and secure MCU, operating in hermetically sealed enclosure. Use Value: 2.2 µF ceramic stability eliminates capacitor aging and leakage risks associated with tantalum - critical for long-term reliability and biocompatibility. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B102MR-G | 1.0 V fixed, 200 mA max, 250 nA IQ, no output discharge, SOT-23-3 | Lacks active VOUT discharge - unsuitable where back-powering must be prevented during shutdown | Select when discharge function is unnecessary and 200 mA output suffices; lower cost but reduced safety margin. |
| Ricoh RP114K101D-TR-F | 1.0 V fixed, 300 mA max, 300 nA IQ, no output discharge, SOT-23-5 (5-pin) | Requires 5-pin package and external EN pin; no integrated discharge transistor | Choose if board layout accommodates 5-pin footprint and system-level discharge is handled externally. |
Compared with XC6210B102MR-G and RP114K101D-TR-F, the MCP1812AT-010/OT uniquely combines 300 mA capability, 250 nA IQ, and integrated output discharge in a 3-pin SOT-23 - eliminating external components and PCB area while ensuring safe power sequencing in ultra-low-power medical and energy-harvesting systems.
Availability
MCP1812AT-010/OT is available at Aetrix Electronics and suitable for energy harvesting nodes, wearable medical devices, and implantable diagnostic patches requiring stable component supply with guaranteed long-term manufacturability and traceable sourcing.
Supply support for MCP1812AT-010/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 microcontroller, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability semiconductor products.
The MCP181X/12X family was engineered specifically for ultra-low-power battery and energy-harvesting applications - prioritizing nanoscale quiescent current, minimal external components, and robust performance across extreme temperature and load transients.
FAQ
What is the minimum input voltage required for MCP1812AT-010/OT to deliver 300 mA output current?
The MCP1812AT-010/OT requires a minimum input voltage of 2.4 V to sustain 300 mA output current while maintaining regulation. This is derived from the 400–600 mV dropout specification plus the 1.0 V nominal output - ensuring reliable operation down to end-of-life voltage of two alkaline cells or partially discharged Li-ion batteries.
Does MCP1812AT-010/OT require an external shutdown resistor or pull-up network?
No, the MCP1812AT-010/OT does not require an external pull-up on the SHDN pin. The device operates normally when SHDN is left unconnected (floating) or tied directly to VIN. An external resistor is only needed if precise logic-level control or noise immunity is required in high-noise environments.
Can MCP1812AT-010/OT be used with a 1 µF output capacitor instead of the recommended 2.2 µF?
No - the MCP1812AT-010/OT is specified and tested for stability only with ≥2.2 µF ceramic (X7R) output capacitance. Using 1 µF violates the stability condition defined in DS20006088C and may cause oscillation or poor transient response, especially under 300 mA load steps.
How does the output discharge feature of MCP1812AT-010/OT behave during shutdown?
When SHDN is pulled to GND, the MCP1812AT-010/OT activates an internal discharge transistor (RDCH ≈ 100 Ω) between VOUT and GND, discharging a 2.2 µF output capacitor from 1.0 V to <100 mV in <250 µs - preventing unintended biasing of downstream circuitry and enabling clean power sequencing.
Is MCP1812AT-010/OT qualified for medical applications per ISO 13485 or IEC 60601?
The MCP1812AT-010/OT is not individually certified to ISO 13485 or IEC 60601; however, it is manufactured in Microchip's ISO 13485-certified facilities and meets AEC-Q200 stress test requirements for passive components. Final medical qualification depends on system-level testing and design validation per applicable standards.
MCP1812AT-010/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):
- 1V
- 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
MCP1812AT-010/OT FAQ
1.How can I place an order for MCP1812AT-010/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1812AT-010/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 MCP1812AT-010/OT reliable?
The price and inventory of MCP1812AT-010/OT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1812AT-010/OT is usually 5 days.
3.What payment methods are accepted for MCP1812AT-010/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1812AT-010/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1812AT-010/OT?
MCP1812AT-010/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1812AT-010/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 MCP1812AT-010/OT?
For technical support, including MCP1812AT-010/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1812AT-010/OT requirements.
6.How does Aetrix verify that MCP1812AT-010/OT is sourced from the original manufacturer or authorized distributors?
All MCP1812AT-010/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 MCP1812AT-010/OT meets industry standards.
7.What is the process for return or replacement of MCP1812AT-010/OT?
All MCP1812AT-010/OT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1812AT-010/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 MCP1812AT-010/OT part is unused and in its original packaging.
Return procedure for MCP1812AT-010/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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