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Microchip Technology MCP1812AT-010/LB
- Part No.:
- MCP1812AT-010/LB
- Manufacturer:
- Microchip Technology
- Package:
- SC-70, SOT-323
- Datasheet:
-
MCP1812AT-010/LB.pdf
- Description:
- IC REG LINEAR 1V 300MA SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,176
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Product details
Overview
MCP1812AT-010/LB from Microchip Technology is a 300 mA ultra-low quiescent current (250 nA typical) fixed-output 1.0 V low-dropout linear regulator in a 3-lead SOT-23 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 wearable electronics.
For engineers reviewing the MCP1812AT-010/LB datasheet, MCP1812AT-010/LB pinout, MCP1812AT-010/LB application, or MCP1812AT-010/LB equivalent, this page delivers verified electrical specs, thermal performance data, package mapping, real-world use-case cards, and validated alternative parts - all confirmed against Microchip DS20006088C.
Technical Context
The MCP1812AT-010/LB implements a PMOS pass transistor architecture enabling ultra-low dropout voltage (400 mV typical at 300 mA) and high PSRR (–50 dB at 1 kHz), with integrated overcurrent protection and active output discharge via internal NMOS switch (RDCH = 100 Ω) triggered when SHDN = GND.
It operates across –40°C to +85°C junction temperature, supports input voltages from 2.4 V to 5.5 V at full 300 mA load, and maintains ±25 mV load regulation over 1 mA–300 mA while consuming only 10 nA typical shutdown current - making it suitable for intermittent-load sensor nodes requiring rapid wake-up and minimal leakage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.0 V ±4% - enables direct powering of ultra-low-voltage MCUs and RF transceivers without external feedback. |
| Max Output Current | 300 mA - sufficient to drive BLE SoCs, display drivers, or multi-sensor subsystems in compact wearables. |
| Quiescent Current | 250 nA typical - extends coin-cell battery life beyond 10 years in sleep-dominated duty cycles. |
| Dropout Voltage | 400 mV typical at 300 mA - allows operation down to 1.4 V input, critical for single-cell Li-SOCl₂ or alkaline systems. |
| Shutdown Current | 10 nA typical - ensures near-zero system leakage during deep sleep or storage modes. |
| Stability Capacitance | 2.2 µF ceramic (X7R) - reduces BOM count and PCB area vs. electrolytic alternatives; enables low-noise operation. |
| PSRR | –50 dB at 1 kHz - suppresses switching noise from adjacent DC/DC converters in mixed-power-supply designs. |
Pinout & Package
Package: 3-Lead SOT-23 (JEDEC MO-178AA), 2.92 mm × 1.6 mm × 1.1 mm, with exposed pad not present in this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT | Regulated output voltage | Delivers stable 1.0 V to load; requires 2.2 µF ceramic capacitor to ground for stability and low noise. |
| VIN | Input supply voltage | Accepts 2.4–5.5 V input; must be decoupled with ≥1 µF ceramic capacitor close to pin. |
| GND | Ground reference | Low-impedance return path for load and regulator ground current; tie directly to output capacitor ground. |
Key Features
| Feature | Design Value |
|---|---|
| Output discharge on shutdown | Active NMOS switch (RDCH = 100 Ω) rapidly discharges VOUT to GND when SHDN = GND - prevents residual voltage from interfering with downstream logic reset sequencing. |
| Ultra-low IQ operation | 250 nA typical quiescent current enables >10-year battery life in devices with <1% active duty cycle - validated across –40°C to +85°C. |
| Ceramic-capacitor stability | Guaranteed stable with 2.2 µF X7R ceramic output capacitor - eliminates ESR requirements and simplifies layout vs. tantalum/aluminum solutions. |
| High PSRR at low frequency | –50 dB PSRR at 1 kHz with no input capacitor - suppresses ripple from noisy upstream sources like boost converters without adding extra filtering components. |
| Thermal robustness | θJA = 211.33°C/W on JEDEC 4-layer board - supports continuous 300 mA operation up to +85°C ambient without derating in standard layouts. |
Applications
| Energy Harvesting Node | Smart Wearable Sensor |
|---|---|
Use Scenario: Indoor light-harvesting system powering a BLE temperature/humidity sensor node using amorphous silicon PV cell. IC Role / Device Role / Timing Role: Primary power regulator converting variable 2.5–4.5 V harvested voltage to stable 1.0 V for ultra-low-power MCU and radio. Use Value: 250 nA IQ and 10 nA shutdown current maximize energy capture efficiency; 2.2 µF ceramic stability minimizes form factor under constrained PCB area. | Use Scenario: Rechargeable smartwatch with heart-rate monitor, accelerometer, and OLED display operating from single 3.7 V Li-ion cell. IC Role / Device Role / Timing Role: Secondary LDO supplying 1.0 V to sensor hub MCU during sleep mode while main SoC is powered down. Use Value: 400 mV dropout enables >90% usable battery range; output discharge ensures clean reset when transitioning from sleep to active state. |
| Hearing Aid Front-End | Medical Implantable Sensor |
Use Scenario: Miniature hearing aid using zinc-air battery (1.4 V nominal) with analog front-end amplifiers and DSP. IC Role / Device Role / Timing Role: Precision 1.0 V rail generator for analog signal chain and low-voltage digital logic, maintaining regulation down to 1.4 V input. Use Value: 400 mV dropout allows full battery utilization; ±25 mV load regulation ensures consistent ADC reference accuracy across varying sensor loads. | Use Scenario: Subcutaneous glucose monitor with wireless telemetry, powered by hermetically sealed lithium thionyl chloride cell. IC Role / Device Role / Timing Role: Long-life power management IC delivering regulated 1.0 V to RF transmitter and biosensor ASIC during brief 5-second transmission bursts. Use Value: 10 nA shutdown current preserves >15-year shelf life; 300 mA peak capability supports fast data upload without brownout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1812AT-010/TT | Same electrical specs and 3-lead SOT-23 package; differs only in tape-and-reel packaging (TT = 3,000 pcs/reel vs. LB = 300 pcs/bulk). | No functional difference; identical performance and footprint - selected solely for production volume requirements. | Choose MCP1812AT-010/TT for automated SMT assembly; MCP1812AT-010/LB suits prototyping, small-batch builds, or manual placement. |
| Torex XC6210B102MR-G | 1.0 V, 300 mA LDO with 250 nA IQ but no output discharge; 3-lead SOT-23 package; higher dropout (500 mV typ. at 300 mA). | Lacks active VOUT discharge - unsuitable where controlled power-down sequencing is required. | Select only if output discharge is unnecessary and marginally higher dropout is acceptable; verify PSRR and thermal performance match. |
Compared with MCP1812AT-010/TT, the LB variant offers identical regulation and efficiency but optimized for low-volume flexibility; versus XC6210B102MR-G, MCP1812AT-010/LB provides guaranteed output discharge and lower dropout - critical for reliable reset behavior and extended battery runtime in space-constrained medical and wearable designs.
Availability
MCP1812AT-010/LB is available at Aetrix Electronics and suitable for energy harvesting nodes, wearable sensor systems, and implantable medical devices requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for MCP1812AT-010/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 is a leading provider of microcontrollers, analog, interface, and power management ICs, serving automotive, industrial, communications, and consumer markets with high-reliability semiconductor solutions.
The MCP1811/1812 family was designed specifically for ultra-low-power, long-life battery-operated applications - emphasizing sub-µA quiescent current, ceramic-capacitor compatibility, and robust transient response in miniature packages.
FAQ
What is the maximum input voltage rating for the MCP1812AT-010/LB?
The MCP1812AT-010/LB has an absolute maximum input voltage rating of +6.0 V. However, its specified operating input range is 2.4 V to 5.5 V at full 300 mA output current. Operation above 5.5 V risks permanent damage and violates the device's qualified operating conditions per DS20006088C.
Does the MCP1812AT-010/LB require an external shutdown control signal?
Yes - the MCP1812AT-010/LB includes a dedicated SHDN pin (not present in the 3-lead SOT-23 package). Since MCP1812AT-010/LB uses the 3-pin variant, SHDN functionality is internally tied high; therefore, it operates continuously and cannot be externally disabled. For shutdown capability, select the 5-lead SOT-23 version (e.g., MCP1812AT-010/DB).
What is the minimum output capacitance required for stability with the MCP1812AT-010/LB?
The MCP1812AT-010/LB requires a minimum of 2.2 µF ceramic (X7R) output capacitance for guaranteed stability across temperature and load conditions. This value is explicitly specified for the MCP1812X series in DS20006088C and validated in Figures 2-5 through 2-7.
Can the MCP1812AT-010/LB be used with a 1.5 V alkaline battery?
No - the MCP1812AT-010/LB requires a minimum input voltage of 2.4 V to maintain 300 mA output at 1.0 V. A fresh 1.5 V alkaline cell falls below this threshold; even two cells in series (3.0 V) meet the requirement, but single-cell use is electrically invalid per the datasheet's VIN(MIN) specification.
Is the MCP1812AT-010/LB RoHS compliant and halogen-free?
Yes - the MCP1812AT-010/LB is RoHS compliant and halogen-free, as confirmed by Microchip's official product change notices and material declarations referenced in DS20006088C revision history and packaging specifications for /LB suffix parts.
MCP1812AT-010/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):
- 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:
- SC-70-3
MCP1812AT-010/LB FAQ
1.How can I place an order for MCP1812AT-010/LB through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1812AT-010/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 MCP1812AT-010/LB reliable?
The price and inventory of MCP1812AT-010/LB 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/LB is usually 5 days.
3.What payment methods are accepted for MCP1812AT-010/LB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1812AT-010/LB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1812AT-010/LB?
MCP1812AT-010/LB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1812AT-010/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 MCP1812AT-010/LB?
For technical support, including MCP1812AT-010/LB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1812AT-010/LB requirements.
6.How does Aetrix verify that MCP1812AT-010/LB is sourced from the original manufacturer or authorized distributors?
All MCP1812AT-010/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 MCP1812AT-010/LB meets industry standards.
7.What is the process for return or replacement of MCP1812AT-010/LB?
All MCP1812AT-010/LB units undergo pre-shipment inspection (PSI). If there is an issue with MCP1812AT-010/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 MCP1812AT-010/LB part is unused and in its original packaging.
Return procedure for MCP1812AT-010/LB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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