My Inquiry
My Account
Microchip Technology MCP1812BT-025/TT
- Part No.:
- MCP1812BT-025/TT
- Manufacturer:
- Microchip Technology
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MCP1812BT-025/TT.pdf
- Description:
- IC REG LINEAR 2.5V 300MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,483
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MCP1812BT-025/TT from Microchip Technology is a 300 mA ultra-low quiescent current (250 nA typical) fixed-output 2.5 V low-dropout linear regulator in a 3-lead SOT-23 package, designed for energy harvesting and long-life battery-powered systems where sleep-mode power budget is critical.
For engineers reviewing the MCP1812BT-025/TT datasheet, MCP1812BT-025/TT pinout, MCP1812BT-025/TT application, or MCP1812BT-025/TT equivalent, key selection criteria include shutdown current (5 nA typical), ceramic capacitor stability (2.2 µF min), dropout voltage (400 mV at 300 mA), and compatibility with ultra-low-power microcontrollers in wearable and medical edge devices.
Technical Context
The MCP1812BT-025/TT implements a PMOS pass transistor architecture enabling ultra-low IQ operation and fast start-up (400 µs typical from shutdown). Its internal error amplifier and reference maintain ±4% output accuracy over -40°C to +85°C junction temperature.
It features integrated overcurrent protection with foldback limiting (100 mA at 1 Ω load) and an active discharge transistor on VOUT during shutdown (MCP1812A variant), ensuring rapid rail collapse in power-gated subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±4% - ensures stable bias for ADC references and low-voltage logic without external feedback. |
| 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 coin-cell–powered devices operating >99.9% in sleep mode. |
| Shutdown Current | 5 nA typical - minimizes leakage when system is fully powered down, critical for energy harvesting storage management. |
| Dropout Voltage | 400 mV at 300 mA - allows regulation from 2.9 V input, extending usable range of partially discharged Li-ion or alkaline cells. |
| Stability | With ≥2.2 µF ceramic output capacitor - eliminates need for costly tantalum or electrolytic capacitors, reducing BOM cost and footprint. |
| PSRR | -50 dB at 1 kHz - suppresses switching noise from DC-DC converters feeding the LDO input rail. |
Pinout & Package
Package: 3-Lead SOT-23 (SC-59), JEDEC MO-178AA, 2.92 mm × 1.6 mm × 1.1 mm body height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 1.8 V to 5.5 V; must be decoupled with ≥1 µF ceramic capacitor near pin for PSRR and transient response. |
| VOUT | Regulated output | Delivers fixed 2.5 V; requires ≥2.2 µF X7R ceramic capacitor to ground for loop stability and low noise. |
| GND | Ground reference | Low-impedance return path for load and internal circuitry; tie directly to output capacitor ground pad to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ operation | 250 nA typical enables >10-year runtime on CR2032 in devices waking once per hour for sensor readout. |
| Active output discharge | Integrated discharge transistor pulls VOUT to GND within microseconds upon SHDN assertion, preventing floating rails. |
| Ceramic-capacitor stability | Guaranteed stable with 2.2 µF X7R ceramic - eliminates ESR requirements and simplifies layout vs. older LDOs. |
| Wide input voltage range | 1.8 V to 5.5 V supports direct connection to single-cell Li-ion, 2× alkaline, or buck converter outputs. |
| Overcurrent foldback | Limits short-circuit current to ~100 mA at 1 Ω load - protects IC and source during fault conditions without thermal runaway. |
Applications
| Wearable Health Monitor | Energy-Harvesting Sensor Node |
|---|---|
Use Scenario: Continuous ECG/PPG sensing with sub-10 µA sleep current and 100 ms wake bursts. IC Role / Device Role / Timing Role: Primary power rail regulator for analog front-end and ultra-low-power MCU. Use Value: 250 nA quiescent current extends CR2032 lifetime beyond 5 years; 2.5 V output matches ADC reference requirement. |
Use Scenario: Solar- or thermal-harvested power managing intermittent 10–100 µJ pulses into storage capacitor. IC Role / Device Role / Timing Role: Low-threshold regulator enabling power-up from <3 V harvested sources. Use Value: 1.8 V minimum input allows regulation from partially charged supercapacitors; 5 nA shutdown prevents leakage drain. |
| Hearing Aid Audio Processor | Smart Card Secure Element |
Use Scenario: Real-time audio processing with adaptive gain control and Bluetooth LE streaming. IC Role / Device Role / Timing Role: Clean, low-noise 2.5 V supply for precision op-amps and SAR ADCs. Use Value: -50 dB PSRR at 1 kHz rejects switching noise from RF section; 169 µVrms output noise preserves SNR. |
Use Scenario: Contactless payment card with ISO/IEC 14443-A interface and cryptographic co-processor. IC Role / Device Role / Timing Role: Regulated supply enabling secure boot and tamper-resistant execution. Use Value: 400 mV dropout permits operation down to 2.9 V from thin-film battery; ±4% tolerance meets smart card voltage compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B252MR-G | 250 mA max output, 250 nA IQ, no output discharge, SOT-23-3 | Lacks active VOUT discharge; suitable only where rail collapse timing is non-critical | Select when lowest possible BOM count is prioritized and shutdown discharge is handled externally. |
| Ricoh RP111N251B-TR-F | 300 mA max output, 300 nA IQ, 1.2 V to 5.5 V input, no discharge, SOT-23-3 | Higher IQ (300 nA vs. 250 nA); no discharge function; tighter initial accuracy (±1% vs. ±4%) | Prefer when absolute output accuracy outweighs shutdown leakage; not drop-in due to different enable logic. |
Compared with XC6210B252MR-G and RP111N251B-TR-F, the MCP1812BT-025/TT uniquely combines 300 mA capability, 250 nA IQ, and integrated output discharge in a standard SOT-23-3 - enabling simpler, more reliable power sequencing in space-constrained, battery-limited designs.
Availability
MCP1812BT-025/TT is available at Aetrix Electronics and suitable for energy harvesting, wearable electronics, and medical device applications requiring stable component supply across extended production lifecycles.
Supply support for MCP1812BT-025/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, analog, FPGA, and mixed-signal semiconductors headquartered in Chandler, Arizona.
The MCP181X/12X family was designed specifically for ultra-low-power, long-life battery and energy-harvesting systems - targeting applications where nanowatt-level standby consumption dictates product viability.
FAQ
What is the maximum input voltage rating for the MCP1812BT-025/TT?
The MCP1812BT-025/TT has an absolute maximum input voltage of +6.0 V. Operation above 5.5 V is not recommended, as the specified input operating range is 1.8 V to 5.5 V. Exceeding 6.0 V risks permanent damage per the Absolute Maximum Ratings table in DS20006088C.
Does the MCP1812BT-025/TT require an external shutdown resistor?
No - the MCP1812BT-025/TT does not have a dedicated SHDN pin. The suffix "T" indicates the 3-lead SOT-23 package variant (VIN, VOUT, GND), which lacks enable control. Shutdown functionality is only available in 5-lead versions (e.g., MCP1812-2502E/TT). The MCP1812BT-025/TT operates continuously when VIN is applied.
Can the MCP1812BT-025/TT be used with a 1 µF output capacitor?
No - the MCP1812BT-025/TT requires a minimum 2.2 µF ceramic (X7R) output capacitor for guaranteed stability, as specified for all MCP1812X variants. Using 1 µF (the value for MCP1811X) may cause oscillation or poor transient response, especially under 300 mA load.
What is the thermal resistance (θJA) of the MCP1812BT-025/TT in its SOT-23 package?
The MCP1812BT-025/TT in 3-lead SOT-23 has a typical junction-to-ambient thermal resistance (θJA) of 211.33°C/W on a JEDEC-standard 4-layer FR4 board with 1 oz. copper. This value assumes standard PCB layout; adding thermal vias or copper pour can significantly reduce effective θJA.
Is the MCP1812BT-025/TT compatible with ceramic capacitors having 10% tolerance?
Yes - the MCP1812BT-025/TT is stable with X7R ceramic capacitors rated ≥2.2 µF, including those with ±10% tolerance. The stability specification accounts for capacitor tolerance, aging, and DC bias effects, provided the effective capacitance remains ≥2.2 µF at operating voltage and temperature.
MCP1812BT-025/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):
- 2.5V
- 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-025/TT FAQ
1.How can I place an order for MCP1812BT-025/TT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1812BT-025/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-025/TT reliable?
The price and inventory of MCP1812BT-025/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-025/TT is usually 5 days.
3.What payment methods are accepted for MCP1812BT-025/TT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1812BT-025/TT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1812BT-025/TT?
MCP1812BT-025/TT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1812BT-025/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-025/TT?
For technical support, including MCP1812BT-025/TT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1812BT-025/TT requirements.
6.How does Aetrix verify that MCP1812BT-025/TT is sourced from the original manufacturer or authorized distributors?
All MCP1812BT-025/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-025/TT meets industry standards.
7.What is the process for return or replacement of MCP1812BT-025/TT?
All MCP1812BT-025/TT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1812BT-025/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-025/TT part is unused and in its original packaging.
Return procedure for MCP1812BT-025/TT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP1812BT-025/TT Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
