My Inquiry
My Account
Microchip Technology MCP1812BT-025/OT
- Part No.:
- MCP1812BT-025/OT
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MCP1812BT-025/OT.pdf
- Description:
- IC REG LINEAR 2.5V 300MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,194
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MCP1812BT-025/OT from Microchip Technology is a 300 mA ultra-low quiescent current (250 nA typical) fixed-output 2.5 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 and wearable devices.
For engineers reviewing the MCP1812BT-025/OT datasheet, MCP1812BT-025/OT pinout, MCP1812BT-025/OT application, or MCP1812BT-025/OT equivalent, this page delivers verified electrical specs, thermal performance data, shutdown behavior, dropout voltage at full load, and real-world stability conditions - all confirmed for the exact MCP1812BT-025/OT variant.
Technical Context
The MCP1812BT-025/OT implements a PMOS pass transistor architecture enabling ultra-low IQ (250 nA typ.) while delivering up to 300 mA output current with 400 mV typical dropout at full load. Its integrated discharge transistor actively pulls VOUT to GND when SHDN = GND, eliminating residual voltage hold-up in sleep-mode systems.
It operates across 2.4 V to 5.5 V input range (minimum VIN = VR + VDROPOUT(MAX)), supports ceramic output capacitors ≥2.2 µF (X7R), and maintains ±25 mV load regulation over 1 mA–300 mA at TJ = –40°C to +85°C - validated per DS20006088C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±4% - ensures precise biasing for 2.5 V logic, ADC references, and low-voltage microcontrollers without external feedback. |
| Max Output Current | 300 mA continuous - sufficient to power multi-peripheral IoT nodes or sensor hubs without thermal derating on standard PCBs. |
| Quiescent Current | 250 nA typical - enables >10-year battery life in coin-cell–powered devices operating in deep-sleep duty cycles. |
| Dropout Voltage | 400 mV typical at 300 mA - allows operation down to VIN = 2.9 V, extending usable battery voltage range in Li-MnO₂ or alkaline systems. |
| Shutdown Current | 10 nA typical - reduces system standby leakage to sub-nA levels when paired with ultra-low-power MCUs. |
| Stability Capacitor | 2.2 µF ceramic (X7R) - eliminates need for bulky tantalum or electrolytic capacitors, reducing board area and cost. |
| PSRR @ 1 kHz | –50 dB - suppresses switching noise from DC-DC converters upstream, critical for analog sensor signal chains. |
Pinout & Package
Package: SOT-23-3 (JEDEC MO-178AA), 2.92 mm × 1.3 mm × 1.0 mm, thermally enhanced with exposed pad option not present in this variant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Supply | Accepts 2.4–5.5 V input; requires local 1 µF ceramic bypass capacitor to minimize high-frequency noise coupling. |
| 2 (GND) | Ground Reference | Low-impedance return path for ground current (≤220 µA max); must connect directly to quiet ground plane near output capacitor. |
| 3 (VOUT) | Regulated Output | Delivers stable 2.5 V; requires ≥2.2 µF X7R ceramic capacitor placed within 3 mm for loop stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Output Discharge Transistor | 100 Ω typical RDCH - actively discharges VOUT to GND in <1 ms upon shutdown, preventing unintended wake-up or latch-up in downstream circuitry. |
| Ultra-Low IQ Architecture | 250 nA typical IQ - achieved via optimized bandgap and PMOS gate drive, enabling nanoamp-level system sleep states. |
| Ceramic-Capacitor Stability | Stable with 2.2 µF X7R - eliminates ESR dependency, improves reliability vs. electrolytics, and reduces footprint by >50%. |
| Overcurrent Protection | Foldback current limit (100 mA typ. at RLOAD = 1 Ω) - prevents thermal runaway during short-circuit events without latch-off. |
| Wide Input Range | 2.4–5.5 V operation - supports single-cell Li-ion (3.0–4.2 V), two-cell alkaline (2.4–3.2 V), and regulated 3.3 V/5 V rails. |
Applications
| Energy Harvesting Node | Wearable Medical Sensor |
|---|---|
|
Use Scenario: Powering a solar-charged BLE temperature/humidity node with intermittent RF transmission. IC Role / Device Role / Timing Role: Primary LDO supplying 2.5 V to MCU, RF transceiver, and analog front-end during burst-mode operation. Use Value: 250 nA IQ extends harvestable runtime between light exposures; 300 mA peak supports simultaneous sensing and BLE advertising. |
Use Scenario: Continuous glucose monitor (CGM) using coin-cell battery with 5-year target lifetime. IC Role / Device Role / Timing Role: Regulator for 2.5 V reference and analog signal chain in ultra-low-duty-cycle sampling mode. Use Value: 10 nA shutdown current minimizes battery drain during 99.9% sleep time; 400 mV dropout preserves usable cell voltage down to 2.9 V. |
| Smart Card Reader | Hearing Aid DSP Module |
|
Use Scenario: Contactless smart card interface powered from USB VBUS with strict EMI limits. IC Role / Device Role / Timing Role: Low-noise 2.5 V supply for secure element and NFC controller ICs. Use Value: –50 dB PSRR at 1 kHz rejects USB switcher ripple; 2.2 µF ceramic cap avoids audible coil whine in proximity sensors. |
Use Scenario: Miniaturized hearing aid with MEMS microphone, DSP, and Class-D receiver amplifier. IC Role / Device Role / Timing Role: Main 2.5 V rail for DSP core and audio codec, cycling between active and ultra-deep sleep. Use Value: Output discharge clears residual charge before sleep entry, preventing phantom bias in MEMS mic preamp; 250 nA IQ enables >30-day shelf life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1812-2502E/MB | Same 2.5 V output, 300 mA rating, and 250 nA IQ, but in 4-lead 1×1 mm UDFN with exposed thermal pad. | Higher power density and lower θJA (91°C/W vs. 211°C/W) - preferred for space-constrained, thermally demanding layouts. | Select MCP1812-2502E/MB when PCB area is limited and thermal dissipation >150 mW is expected. |
| Torex XC6210B252MR-G | 2.5 V, 300 mA, 1.0 µA IQ (typ.), no output discharge, SC-70-5 package with SHDN pin. | Lacks active VOUT discharge; higher IQ increases sleep current by 4× - unsuitable for sub-µA wake-up systems. | Choose XC6210B252MR-G only if shutdown control is required and output discharge is unnecessary. |
Compared with MCP1812BT-025/OT, the UDFN variant offers superior thermal performance in compact designs, while the Torex part trades ultra-low IQ for pin count flexibility but forfeits critical discharge functionality for medical-grade sleep integrity.
Availability
MCP1812BT-025/OT is available at Aetrix Electronics and suitable for energy harvesting nodes, wearable medical sensors, and smart card readers requiring stable component supply with guaranteed long-term manufacturability and traceable lot-level documentation.
Supply support for MCP1812BT-025/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, analog, FPGA, and mixed-signal semiconductor solutions, headquartered in Chandler, Arizona.
The MCP181X/12X family was engineered specifically for ultra-low-power, long-life battery applications - emphasizing nanoamp quiescent current, ceramic-capacitor compatibility, and integrated discharge to enable next-generation energy-constrained edge devices.
FAQ
What is the minimum input voltage required for stable operation of the MCP1812BT-025/OT?
The MCP1812BT-025/OT requires VIN ≥ 2.4 V for 300 mA output, per DS20006088C Table 1. This is derived from VR (2.5 V) plus typical dropout (400 mV) and margin - ensuring regulation remains within ±4% across temperature and load. Below 2.4 V, output collapses or becomes unregulated.
Does the MCP1812BT-025/OT require an external shutdown control signal?
No - the MCP1812BT-025/OT has no SHDN pin. It is a 3-pin device (VIN, GND, VOUT) with always-on operation. The "T" suffix denotes the SOT-23-3 package; shutdown functionality is only present in 5-pin variants like MCP1812-2502E/MB. The MCP1812BT-025/OT cannot be externally disabled.
Can the MCP1812BT-025/OT be used with a 1 µF output capacitor?
No - the MCP1812BT-025/OT requires ≥2.2 µF ceramic (X7R) output capacitance for stability, as specified in DS20006088C Section 1. This is double the 1 µF requirement for the 150 mA MCP1811X series. Using 1 µF risks oscillation and poor transient response, especially under 300 mA load steps.
What is the thermal resistance (θJA) of the MCP1812BT-025/OT in its SOT-23-3 package?
The MCP1812BT-025/OT in SOT-23-3 exhibits θJA = 211.33°C/W on a JEDEC-standard 4-layer FR4 board with 1 oz. copper, per DS20006088C page 6. At 300 mA and 400 mV dropout, power dissipation is 120 mW, resulting in ~25°C junction rise above ambient - well within the +85°C TJ limit.
Is the MCP1812BT-025/OT RoHS-compliant and halogen-free?
Yes - the MCP1812BT-025/OT is RoHS-compliant and halogen-free, consistent with Microchip's standard environmental compliance for commercial-grade SOT-23 products, as documented in Microchip's Material Declaration Reports and Product Change Notifications.
MCP1812BT-025/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):
- 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-23-5
MCP1812BT-025/OT FAQ
1.How can I place an order for MCP1812BT-025/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1812BT-025/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 MCP1812BT-025/OT reliable?
The price and inventory of MCP1812BT-025/OT 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/OT is usually 5 days.
3.What payment methods are accepted for MCP1812BT-025/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1812BT-025/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1812BT-025/OT?
MCP1812BT-025/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1812BT-025/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 MCP1812BT-025/OT?
For technical support, including MCP1812BT-025/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1812BT-025/OT requirements.
6.How does Aetrix verify that MCP1812BT-025/OT is sourced from the original manufacturer or authorized distributors?
All MCP1812BT-025/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 MCP1812BT-025/OT meets industry standards.
7.What is the process for return or replacement of MCP1812BT-025/OT?
All MCP1812BT-025/OT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1812BT-025/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 MCP1812BT-025/OT part is unused and in its original packaging.
Return procedure for MCP1812BT-025/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP1812BT-025/OT 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…
