My Inquiry
My Account
Microchip Technology MCP1812BT-028/OT
- Part No.:
- MCP1812BT-028/OT
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MCP1812BT-028/OT.pdf
- Description:
- IC REG LINEAR 2.8V 300MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,660
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MCP1812BT-028/OT from Microchip Technology is a 300 mA ultra-low quiescent current (250 nA typical) fixed 2.8 V low-dropout linear regulator in SOT-23-5 package, designed for energy harvesting and long-life battery-powered systems requiring stable low-voltage supply with minimal standby power loss.
For engineers reviewing the MCP1812BT-028/OT datasheet, MCP1812BT-028/OT pinout, MCP1812BT-028/OT application, or MCP1812BT-028/OT equivalent, this page delivers verified electrical specs, thermal performance data, shutdown behavior, ceramic capacitor stability requirements, and real-world use cases in wearable and medical edge devices.
Technical Context
The MCP1812BT-028/OT belongs to the MCP1812B variant family - featuring no output discharge during shutdown and 5 nA typical shutdown current. It operates across 2.4 V to 5.5 V input range and maintains regulation down to 400 mV dropout at 300 mA load.
Its internal architecture supports stable operation with only 2.2 µF ceramic output capacitance, delivers ±25 mV load regulation over 1–300 mA, and achieves –50 dB PSRR at 1 kHz without input capacitor - enabling compact, low-noise power delivery in space-constrained IoT nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±4% - ensures precise biasing for 2.8 V logic rails and analog sensors without external feedback. |
| Max Output Current | 300 mA continuous - powers multi-peripheral microcontrollers or BLE radios without thermal derating under typical ambient conditions. |
| Quiescent Current | 250 nA typical - enables >10-year battery life in coin-cell-powered devices operating mostly in sleep mode. |
| Shutdown Current | 5 nA typical - reduces system standby leakage to negligible levels when host MCU asserts SHDN low. |
| Dropout Voltage | 400 mV max at 300 mA - allows operation from single Li-SOCl₂ or two alkaline cells even near end-of-life. |
| Input Voltage Range | 2.4 V to 5.5 V - compatible with wide-input energy harvesters (e.g., solar, thermal) and legacy 3.3 V/5 V supply domains. |
| Stability Capacitor | 2.2 µF ceramic (X7R) - eliminates need for bulky tantalum or electrolytic capacitors, reducing board area and cost. |
Pinout & Package
Package: 5-Lead SOT-23 (SC-74A), 2.9 mm × 1.6 mm × 1.1 mm body, exposed pad optional for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VIN | Input voltage supply | Accepts 2.4–5.5 V unregulated input; requires local 1 µF ceramic bypass close to pin. |
| 2: SHDN | Active-low enable control | Pulled high internally; drives <20% VIN to disable regulator and reduce IQ to 5 nA. |
| 3: NC | No connect | Internally unconnected; must be left floating or tied to GND per layout best practice. |
| 4: VOUT | Regulated 2.8 V output | Delivers up to 300 mA; requires 2.2 µF X7R ceramic capacitor placed adjacent to pin. |
| 5: GND | Power ground reference | Low-impedance return path for load and quiescent current; connects directly to output capacitor ground. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ operation | 250 nA typical - extends shelf life and operational runtime in intermittently active sensor nodes. |
| No output discharge | Eliminates VOUT pull-down on shutdown - preserves state in downstream circuits retaining charge or configuration. |
| Ceramic-capacitor stable | 2.2 µF minimum - enables high-reliability, low-ESR, temperature-stable filtering without aging or polarity concerns. |
| Overcurrent protection | Foldback current limit (100 mA at RLOAD = 1 Ω) - prevents thermal runaway during short-circuit events. |
| Wide temperature range | –40°C to +85°C operating junction - qualified for industrial and medical wearable environments. |
Applications
| Energy Harvesting Node | Smart Wearable Sensor |
|---|---|
Use Scenario: Indoor light-harvesting system powering a BLE temperature/humidity sensor node with intermittent 10-second wake-up cycles. IC Role / Device Role / Timing Role: Primary 2.8 V LDO supplying MCU, radio, and analog front-end during active bursts while drawing <300 nA between transmissions. Use Value: Enables >7-year operation on a single 20 mm² amorphous silicon cell due to sub-µA quiescent draw and 2.2 µF ceramic stability. |
Use Scenario: Compact wrist-worn health monitor measuring ECG and SpO₂ using ultra-low-power analog signal chain and ARM Cortex-M0+ MCU. IC Role / Device Role / Timing Role: Main power rail regulator delivering clean 2.8 V to mixed-signal ICs; disabled during motion-sensing sleep to minimize leakage. Use Value: Achieves 3.2 µA average system current by leveraging 5 nA shutdown mode and fast 400 µs startup from SHDN assertion. |
| Hearing Aid Front-End | Long-Life Smart Card |
Use Scenario: Rechargeable hearing aid with MEMS microphone, audio ADC, and Class-D receiver amplifier operating from 3.7 V Li-ion cell. IC Role / Device Role / Timing Role: Low-noise 2.8 V supply for analog audio path; maintains regulation down to 3.1 V input as battery discharges. Use Value: Delivers 169 µVrms integrated noise (10 Hz–100 kHz) and –50 dB PSRR at 1 kHz - preserving SNR in sensitive audio acquisition. |
Use Scenario: Contactless payment card with embedded secure element and RF transceiver powered by printed battery. IC Role / Device Role / Timing Role: Standby regulator maintaining 2.8 V rail during NFC field detection; activated only upon RF coupling event. Use Value: Draws just 5 nA in SHDN mode - extends usable life of thin-film battery beyond 5 years without recharge capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B282MR-G | 280 mA max output, 250 nA IQ, same 2.8 V fixed output, SOT-25 package | Lacks shutdown control; always-on operation limits use in duty-cycled systems | Select when shutdown functionality is unnecessary and PCB space is constrained to 5-pin SOT-25 footprint. |
| Ricoh RP114K281D-TR-F | 300 mA max output, 300 nA IQ, 2.8 V fixed, SOT-23-5, includes output discharge | Discharges VOUT on shutdown - unsuitable where downstream circuitry must retain voltage state | Choose only if output discharge is required for system-level reset sequencing or safety compliance. |
Compared with XC6210B282MR-G and RP114K281D-TR-F, the MCP1812BT-028/OT uniquely balances 300 mA drive, 5 nA shutdown, and no-output-discharge behavior - making it optimal for battery-gated systems needing zero-leakage standby and deterministic power-rail retention.
Availability
MCP1812BT-028/OT is available at Aetrix Electronics and suitable for energy harvesting nodes, wearable medical sensors, and smart cards requiring stable component supply with guaranteed long-term manufacturability and traceable sourcing.
Supply support for MCP1812BT-028/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 timing solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The MCP1812BT-028/OT belongs to Microchip's ultra-low-power LDO family, engineered specifically for battery- and energy-harvesting–powered edge devices demanding nanowatt-level standby consumption without sacrificing output current capability.
FAQ
What is the maximum input voltage rating for the MCP1812BT-028/OT?
The MCP1812BT-028/OT 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 for full 300 mA output capability. Exceeding 5.5 V may cause permanent damage or violate thermal limits, especially in small SOT-23-5 packages without enhanced thermal pads.
Does the MCP1812BT-028/OT require an input capacitor?
The MCP1812BT-028/OT does not require an input capacitor for stability, as confirmed in the datasheet AC/DC characteristics table. However, a 1 µF ceramic capacitor placed close to the VIN pin is strongly recommended to suppress high-frequency noise and transient spikes from upstream sources like switching harvesters or shared supply rails.
How does the MCP1812BT-028/OT behave during startup from shutdown?
When SHDN is pulled high, the MCP1812BT-028/OT starts regulating within 400 µs (typical delay) and reaches 95% of 2.8 V output in ≤1000 µs (typical rise time). During this transition, output overshoot is limited to ≤5% of VOUT, ensuring safe power-up for sensitive downstream logic and analog circuits.
Is the MCP1812BT-028/OT compatible with 1 µF ceramic output capacitors?
No - the MCP1812BT-028/OT requires a minimum of 2.2 µF X7R ceramic output capacitor for guaranteed stability, as explicitly stated in the datasheet for all MCP1812X variants. Using 1 µF may result in oscillation or poor transient response, particularly under dynamic load steps up to 300 mA.
What thermal resistance values apply to the MCP1812BT-028/OT in SOT-23-5 package?
In the standard 5-lead SOT-23 package, the MCP1812BT-028/OT has a junction-to-ambient thermal resistance (θJA) of 184.82 °C/W and junction-to-case (top) resistance (θJC(Top)) of 151.05 °C/W, measured on JEDEC-standard 4-layer FR4 board with 1 oz. copper. These values assume no thermal vias or copper pour enhancements.
MCP1812BT-028/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):
- 2.8V
- 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-028/OT FAQ
1.How can I place an order for MCP1812BT-028/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1812BT-028/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-028/OT reliable?
The price and inventory of MCP1812BT-028/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-028/OT is usually 5 days.
3.What payment methods are accepted for MCP1812BT-028/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1812BT-028/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1812BT-028/OT?
MCP1812BT-028/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1812BT-028/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-028/OT?
For technical support, including MCP1812BT-028/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1812BT-028/OT requirements.
6.How does Aetrix verify that MCP1812BT-028/OT is sourced from the original manufacturer or authorized distributors?
All MCP1812BT-028/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-028/OT meets industry standards.
7.What is the process for return or replacement of MCP1812BT-028/OT?
All MCP1812BT-028/OT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1812BT-028/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-028/OT part is unused and in its original packaging.
Return procedure for MCP1812BT-028/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP1812BT-028/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…
