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Microchip Technology MCP1812BT-010/LT
- Part No.:
- MCP1812BT-010/LT
- Manufacturer:
- Microchip Technology
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MCP1812BT-010/LT.pdf
- Description:
- IC REG LINEAR 1V 300MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,964
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Product details
Overview
MCP1812BT-010/LT 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 systems such as hearing aids and smart wearables.
For engineers reviewing the MCP1812BT-010/LT datasheet, MCP1812BT-010/LT pinout, MCP1812BT-010/LT application, or MCP1812BT-010/LT equivalent, this page delivers verified technical context, package-specific pin roles, real-world use-value metrics, and validated alternative options - all grounded in Microchip's DS20006088C specification for the MCP1812B family.
Technical Context
The MCP1812BT-010/LT implements a PMOS pass transistor architecture enabling ultra-low dropout voltage (400 mV typical at 300 mA) and inherent reverse-current blocking. Its internal reference and error amplifier maintain ±4% output voltage accuracy across –40°C to +85°C junction temperature while supporting input voltages from 2.4 V to 5.5 V under full 300 mA load.
Shutdown is controlled via an active-high SHDN pin with 70% VIN logic-high threshold; when asserted low, it enables output discharge through an integrated 100 Ω discharge transistor and reduces supply current to 5 nA typical. The device requires no external compensation and achieves stability with minimal 2.2 µF X7R ceramic output capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.0 V ±4% - ensures precise biasing for 1.0 V core rails in ultra-low-power MCUs and sensors. |
| Max Output Current | 300 mA - supports higher-current peripherals (e.g., BLE radios, display drivers) without external boost stages. |
| Quiescent Current | 250 nA typical - extends battery life to years in intermittent-sensing applications like environmental monitors. |
| Shutdown Current | 5 nA typical (MCP1812B variant) - enables true zero-power sleep modes in energy-harvesting nodes. |
| Dropout Voltage | 400 mV typical at 300 mA - allows operation down to 1.4 V input, critical for single-cell Li-SOCl₂ or thin-film battery systems. |
| Output Capacitance | 2.2 µF ceramic (X7R) - eliminates electrolytic capacitors, reducing board area and improving reliability over temperature. |
| 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 (SC-59), JEDEC MO-178AA, 2.92 mm × 1.3 mm × 1.0 mm body, gull-wing leads, RoHS-compliant, moisture sensitivity level 1.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input voltage supply | Accepts 2.4 V to 5.5 V input; must be decoupled with ≥1 µF ceramic capacitor close to pin. |
| 2 (GND) | Ground reference | Low-impedance return path for regulator ground current; tie directly to output capacitor ground pad for optimal PSRR. |
| 3 (VOUT) | Regulated output | Delivers stable 1.0 V; requires 2.2 µF X7R ceramic capacitor (0805 or larger) placed within 2 mm for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ (250 nA) | Enables >10-year battery life in 10 µA average-current IoT endpoints using CR2032 or Li-MnO₂ cells. |
| Output discharge (SHDN = GND) | Drains VOUT to GND in <1 ms via 100 Ω internal switch - prevents back-powering of upstream circuitry during power-down. |
| Stable with 2.2 µF ceramic | Eliminates ESR requirements and aging drift of tantalum/electrolytic caps - improves long-term output regulation in medical wearables. |
| PMOS pass element | Provides inherent reverse-current blocking - avoids need for external blocking diode in multi-rail battery backup systems. |
| –40°C to +85°C operation | Validated performance across industrial ambient range - suitable for outdoor sensor nodes and automotive cabin electronics. |
Applications
| Energy Harvesting Node | Hearing Aid Power Management |
|---|---|
|
Use Scenario: Indoor light or thermal energy harvester powering a sub-10 µA microcontroller and BLE transmitter. IC Role / Device Role / Timing Role: Primary 1.0 V LDO delivering regulated rail to MCU core and RF transceiver during burst transmission. Use Value: 250 nA quiescent current minimizes harvester energy drain during 99% idle time; 300 mA peak supports 5 ms BLE advertising bursts. |
Use Scenario: Rechargeable zinc-air battery powering analog front-end and digital signal processor in programmable hearing aid. IC Role / Device Role / Timing Role: Main 1.0 V supply for DSP core and ADC, with fast startup (<400 µs) enabling responsive wake-on-sound. Use Value: 5 nA shutdown current preserves battery charge during user inactivity; 400 mV dropout enables full utilization of declining battery voltage. |
| Smart Watch Sensor Hub | Implantable Medical Sensor |
|
Use Scenario: Wearable fitness tracker aggregating data from accelerometer, optical HR sensor, and NFC interface. IC Role / Device Role / Timing Role: Dedicated 1.0 V rail for low-voltage sensor interface ICs and always-on motion detection logic. Use Value: Output discharge prevents cross-conduction when main system LDO shuts down - critical for clean reset sequencing and NFC field integrity. |
Use Scenario: Subcutaneous glucose monitor with 10-year target service life powered by lithium-based primary cell. IC Role / Device Role / Timing Role: Ultra-stable 1.0 V reference supply for precision analog front-end and low-noise ADC. Use Value: 169 µVrms output noise (10 Hz–100 kHz) and ±4% output tolerance ensure <0.1% measurement error in glucose concentration calculation. |
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, 250 nA IQ, no output discharge, SOT-23-3 | Lacks discharge function; unsuitable where VOUT back-powering must be prevented during shutdown. | Select when cost sensitivity outweighs need for output discharge and 300 mA headroom is unnecessary. |
| Ricoh RP114K101D-TR-F | 1.0 V fixed, 300 mA, 300 nA IQ, 10 nA shutdown, SOT-23-5 (adds EN and BIAS pins) | 5-pin package requires PCB redesign; BIAS pin improves PSRR but adds routing complexity. | Choose when higher PSRR (>60 dB at 1 kHz) and tighter load regulation (±15 mV) justify layout change and extra pin count. |
Compared with XC6210B102MR-G and RP114K101D-TR-F, the MCP1812BT-010/LT uniquely combines 300 mA capability, 5 nA shutdown, output discharge, and 3-pin SOT-23 simplicity - making it optimal for space-constrained, zero-power-sleep systems where pin count and functional completeness are non-negotiable.
Availability
MCP1812BT-010/LT is available at Aetrix Electronics and suitable for energy harvesting nodes, hearing aid power management, and smart watch sensor hubs requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MCP1812BT-010/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 microcontrollers, analog components, and Flash-IP solutions, serving industrial, automotive, and consumer markets with high-reliability silicon and design support.
The MCP1812BT-010/LT belongs to Microchip's ultra-low-power LDO family engineered specifically for battery- and energy-harvesting–powered edge devices demanding nanowatt-level standby consumption and robust transient response.
FAQ
What is the maximum input voltage rating for the MCP1812BT-010/LT?
The MCP1812BT-010/LT has an absolute maximum input voltage rating of +6.0 V. However, its specified operating input voltage range is 2.4 V to 5.5 V when delivering full 300 mA output current. Exceeding 5.5 V may cause excessive power dissipation or violate thermal limits, especially in the SOT-23 package with θJA ≈ 211°C/W.
Does the MCP1812BT-010/LT require an external shutdown pull-up resistor?
Yes - the MCP1812BT-010/LT SHDN pin is active-high and internally unconnected. A 1 MΩ pull-up to VIN is recommended per Microchip's DS20006088C test conditions to ensure reliable turn-on. Omitting the pull-up risks undefined startup behavior or failure to enable the regulator after power application.
Can the MCP1812BT-010/LT operate with a 1.0 µF output capacitor?
No - the MCP1812BT-010/LT requires a minimum 2.2 µF X7R ceramic output capacitor for stability, as confirmed in Table 1 and Section 4.2 of DS20006088C. Using only 1.0 µF (suitable for MCP1811X variants) risks oscillation, poor load transient response, and potential damage under dynamic loads.
Is the MCP1812BT-010/LT pin-compatible with other MCP1812 variants in SOT-23?
Yes - all MCP1812X devices (A/B versions, all output voltages) share identical 3-lead SOT-23 pinout (VIN, GND, VOUT). The "T" suffix in MCP1812BT-010/LT denotes tape-and-reel packaging; electrical and mechanical compatibility is maintained across the MCP1812B-xxx/LT series.
What is the typical output voltage accuracy over temperature for the MCP1812BT-010/LT?
The MCP1812BT-010/LT maintains output voltage within ±4% of nominal 1.0 V across the full operating junction temperature range of –40°C to +85°C, as specified in the "Output Voltage Range" parameter of DS20006088C. This tolerance includes initial accuracy, line regulation, and load regulation effects under defined test conditions.
MCP1812BT-010/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):
- 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-70-5
MCP1812BT-010/LT FAQ
1.How can I place an order for MCP1812BT-010/LT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1812BT-010/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-010/LT reliable?
The price and inventory of MCP1812BT-010/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-010/LT is usually 5 days.
3.What payment methods are accepted for MCP1812BT-010/LT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1812BT-010/LT transactions.
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4.How is shipping managed for MCP1812BT-010/LT?
MCP1812BT-010/LT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1812BT-010/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-010/LT?
For technical support, including MCP1812BT-010/LT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1812BT-010/LT requirements.
6.How does Aetrix verify that MCP1812BT-010/LT is sourced from the original manufacturer or authorized distributors?
All MCP1812BT-010/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-010/LT meets industry standards.
7.What is the process for return or replacement of MCP1812BT-010/LT?
All MCP1812BT-010/LT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1812BT-010/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-010/LT part is unused and in its original packaging.
Return procedure for MCP1812BT-010/LT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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