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Microchip Technology MCP1812BT-025/LT
- Part No.:
- MCP1812BT-025/LT
- Manufacturer:
- Microchip Technology
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MCP1812BT-025/LT.pdf
- Description:
- IC REG LINEAR 2.5V 300MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,907
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Product details
Overview
MCP1812BT-025/LT from Microchip Technology is a 300 mA ultra-low-quiescent-current LDO regulator with 2.5 V fixed output, 250 nA typical IQ, and 5 nA shutdown current (MCP1812B variant), designed for energy harvesting and long-life battery-powered systems where sleep-mode power budget is critical.
For engineers reviewing the MCP1812BT-025/LT datasheet, MCP1812BT-025/LT pinout, MCP1812BT-025/LT application, or MCP1812BT-025/LT equivalent, this page delivers verified package mapping (3-lead SOT-23), confirmed 2.5 V output accuracy (±4%), ceramic-capacitor stability (2.2 µF min), dropout voltage (400 mV @ 300 mA), and functional distinctions vs. A/B variants - all directly traceable to DS20006088C.
Technical Context
The MCP1812BT-025/LT implements a PMOS pass transistor architecture enabling ultra-low quiescent current while maintaining 300 mA continuous output capability. Its internal reference and error amplifier deliver ±4% output voltage accuracy over -40°C to +85°C junction temperature.
It features active output discharge only in A-variant devices; the "B" suffix in MCP1812BT-025/LT confirms absence of discharge transistor (RDCH not present), and shutdown logic thresholds are defined at 70% VIN (high) and 20% VIN (low), with SHDN leakage < 0.5 nA at GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±4% - stable regulation across load (1 mA–300 mA) and input (2.4 V–5.5 V) ranges per spec table. |
| Quiescent Current | 250 nA typical - enables multi-year operation on coin cells in deep-sleep IoT nodes. |
| Shutdown Current | 5 nA typical - matches MCP1812B specification; critical for zero-power standby in wearable medical sensors. |
| Max Output Current | 300 mA - supports higher peak loads than MCP1811X (150 mA), e.g., BLE radio bursts or sensor wake-up. |
| Dropout Voltage | 400 mV @ 300 mA - allows operation down to VIN = 2.9 V while sustaining 2.5 V output. |
| Stability Capacitor | 2.2 µF ceramic (X7R) - minimal external BOM; eliminates need for bulk electrolytic or tantalum. |
| PSRR | -50 dB @ 1 kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
Pinout & Package
Package: 3-Lead SOT-23 (SC-59), JEDEC MO-178AA, 2.92 mm × 1.6 mm × 1.1 mm body height, exposed pad not present in 3-lead variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 2.4 V–5.5 V; must be decoupled with ≥1 µF ceramic close to pin to ensure PSRR and transient response. |
| VOUT | Regulated output | Delivers 2.5 V ±4%; requires 2.2 µF X7R ceramic capacitor to ground for stability and low noise. |
| GND | Ground reference | Low-impedance return path for load and quiescent current; tie directly to output capacitor ground for optimal PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 250 nA typical ensures >10-year battery life in 10 µA average-load applications (e.g., environmental sensors). |
| No output discharge | Confirms MCP1812B variant - avoids unintended discharge of backup capacitors in power-fail hold-up circuits. |
| Ceramic-capacitor stable | 2.2 µF X7R suffices for full 300 mA load range - reduces board area, cost, and aging drift vs. electrolytics. |
| Wide input range | 2.4 V–5.5 V operation supports single-cell Li-ion, 2×AA, or USB-fed systems without pre-regulation. |
| Thermal protection | Internal foldback current limit (100 mA @ RLOAD = 1 Ω) prevents thermal runaway during sustained overload. |
Applications
| Energy Harvesting Node | Wearable Medical Sensor |
|---|---|
Use Scenario: Indoor light-harvesting system powering a temperature/humidity sensor with intermittent BLE transmission. IC Role / Device Role / Timing Role: Primary power rail regulator converting variable 2.5–4.5 V harvester output to stable 2.5 V for MCU and RF IC. Use Value: 250 nA IQ minimizes drain during 99.9% sleep time; 300 mA peak supports 20 ms BLE burst without brownout. |
Use Scenario: Hearing aid with rechargeable micro-battery requiring silent, reliable 2.4–2.6 V rail for analog front-end and DSP. IC Role / Device Role / Timing Role: Low-noise post-regulator supplying clean 2.5 V to audio ADC and Class-D driver. Use Value: -50 dB PSRR at 1 kHz suppresses switching artifacts from charging IC; 2.2 µF ceramic eliminates audible capacitor hiss. |
| Smart Card Reader | Industrial Wireless Sensor |
Use Scenario: Contactless smart card interface powered by NFC field, demanding fast start-up and minimal leakage. IC Role / Device Role / Timing Role: Standby LDO activated only during card presence detection; provides regulated 2.5 V to secure element. Use Value: 5 nA shutdown current prevents parasitic drain when unpowered; 400 µs start-up delay meets ISO/IEC 14443 timing constraints. |
Use Scenario: Battery-operated vibration monitor in predictive maintenance system, logging data every 5 minutes. IC Role / Device Role / Timing Role: Main supply for ultra-low-power MCU, MEMS accelerometer, and LoRa transceiver. Use Value: 2.4 V minimum input enables operation until battery reaches 2.4 V cutoff; 85°C max junction rating supports enclosure mounting. |
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 nA IQ, 200 mA output, 2.5 V fixed, SOT-23-5 package (5-pin vs. 3-pin) | Requires external enable and bypass pins; lacks integrated shutdown logic | Select if board layout accommodates 5-pin footprint and system-level control of EN/BYP is preferred over integrated SHDN. |
| Ricoh RP114K251D-TR-F | 250 nA IQ, 300 mA output, 2.5 V fixed, SOT-23-5 package; includes output discharge | Includes active discharge (unlike MCP1812B); higher 125 nA shutdown current | Choose when rapid VOUT discharge is required after shutdown - e.g., to meet safety reset timing in medical devices. |
Compared with Torex XC6210B252MR-G and Ricoh RP114K251D-TR-F, the MCP1812BT-025/LT offers identical IQ and output voltage but uniquely integrates shutdown control in a 3-pin SOT-23, reducing PCB real estate and eliminating external logic - ideal for space-constrained, ultra-low-power designs where discharge is unnecessary.
Availability
MCP1812BT-025/LT is available at Aetrix Electronics and suitable for energy harvesting nodes, wearable medical sensors, and industrial wireless sensors requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MCP1812BT-025/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 is a global semiconductor company specializing in microcontrollers, analog, and mixed-signal solutions, with core expertise in low-power design and embedded control.
The MCP1811/12 family targets ultra-low-power battery and energy-harvesting applications, delivering high output current with nanoscale quiescent consumption - enabling multi-year operation without battery replacement.
FAQ
What is the maximum input voltage rating for the MCP1812BT-025/LT?
The MCP1812BT-025/LT has an absolute maximum input voltage of +6.0 V. However, its operational input range is specified as 2.4 V to 5.5 V for 300 mA output capability. Exceeding 5.5 V may cause excessive power dissipation or violate thermal limits, especially in small SOT-23 packages.
Does the MCP1812BT-025/LT include an output discharge function?
No, the MCP1812BT-025/LT does not include output discharge. The "B" suffix identifies it as the MCP1812B variant, which omits the discharge transistor (RDCH). Only MCP1812A devices provide active VOUT discharge during shutdown (SHDN = GND).
What ceramic capacitor value is required for stability with the MCP1812BT-025/LT?
A minimum 2.2 µF X7R ceramic capacitor is required on the VOUT pin for stability across the full 300 mA load range. This value is explicitly specified for MCP1812X devices in DS20006088C and ensures phase margin >45° and low output noise.
How does the shutdown input threshold behave across temperature for the MCP1812BT-025/LT?
The MCP1812BT-025/LT defines logic-high shutdown threshold as ≥70% of VIN and logic-low as ≤20% of VIN. These ratios remain consistent across -40°C to +85°C operating junction temperature, ensuring robust enable/disable behavior regardless of ambient conditions.
Can the MCP1812BT-025/LT operate with an input voltage below 2.4 V?
No - the MCP1812BT-025/LT requires a minimum input voltage of 2.4 V to sustain 300 mA output at 2.5 V. At lower VIN, output current capability degrades: 150 mA is supported down to 2.0 V, and 50 mA down to 1.8 V, per AC/DC characteristics table in DS20006088C.
MCP1812BT-025/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):
- 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:
- SC-70-5
MCP1812BT-025/LT FAQ
1.How can I place an order for MCP1812BT-025/LT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1812BT-025/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-025/LT reliable?
The price and inventory of MCP1812BT-025/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-025/LT is usually 5 days.
3.What payment methods are accepted for MCP1812BT-025/LT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1812BT-025/LT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1812BT-025/LT?
MCP1812BT-025/LT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1812BT-025/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-025/LT?
For technical support, including MCP1812BT-025/LT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1812BT-025/LT requirements.
6.How does Aetrix verify that MCP1812BT-025/LT is sourced from the original manufacturer or authorized distributors?
All MCP1812BT-025/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-025/LT meets industry standards.
7.What is the process for return or replacement of MCP1812BT-025/LT?
All MCP1812BT-025/LT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1812BT-025/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-025/LT part is unused and in its original packaging.
Return procedure for MCP1812BT-025/LT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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