My Inquiry
My Account
Microchip Technology MCP1812AT-010/TT
- Part No.:
- MCP1812AT-010/TT
- Manufacturer:
- Microchip Technology
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MCP1812AT-010/TT.pdf
- Description:
- IC REG LINEAR 1V 300MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,426
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MCP1812AT-010/TT from Microchip Technology is a 300 mA ultra-low-quiescent-current LDO linear regulator with fixed 1.0 V output, 250 nA typical operating IQ, and output discharge functionality (MCP1812A variant). It operates from 1.8V to 5.5V input, supports ceramic output capacitors ≥2.2 µF, and targets battery-critical systems such as hearing aids and energy-harvesting sensors.
For engineers reviewing the MCP1812AT-010/TT datasheet, MCP1812AT-010/TT pinout, MCP1812AT-010/TT application, or MCP1812AT-010/TT equivalent, this page delivers verified electrical specs, package mapping to 3-lead SOT-23, thermal performance data, shutdown behavior (5–10 nA), and real-world use cases in ultra-low-power wearable and medical electronics.
Technical Context
The MCP1812AT-010/TT implements a low-dropout PMOS pass transistor architecture enabling stable regulation down to 400 mV dropout at 300 mA load. Its internal error amplifier and reference circuit maintain ±4% output accuracy across –40°C to +85°C junction temperature while drawing only 250 nA quiescent current during active operation.
It integrates an active discharge transistor (RDCH ≤ 100 Ω) tied to the SHDN pin, enabling rapid VOUT collapse during shutdown - a critical feature for multi-rail sequencing in battery-powered systems. The device requires no external compensation and achieves stability with 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 of 1.0 V logic cores and ultra-low-voltage analog sensors. |
| Max Output Current | 300 mA continuous - supports higher-current peripherals (e.g., BLE radios, ADCs) without derating in compact wearables. |
| Quiescent Current | 250 nA typical (active), 10 nA typical (SHDN) - extends coin-cell life to >10 years in sleep-dominated duty cycles. |
| Input Voltage Range | 1.8 V to 5.5 V - compatible with single Li-ion, two alkaline, or energy-harvested sources (e.g., solar, thermal). |
| Dropout Voltage | 400 mV max at 300 mA - enables regulation from 1.4 V input, maximizing usable battery voltage range. |
| Output Capacitor | 2.2 µF ceramic (X7R) - reduces BOM count and PCB area vs. tantalum; lowers output noise to 169.31 µVRMS (10 Hz–100 kHz). |
| PSRR | –50 dB @ 1 kHz - suppresses switching noise from adjacent DC/DC converters in mixed-signal SoC power domains. |
Pinout & Package
Package: 3-Lead SOT-23 (JEDEC MO-178AA), 2.92 mm × 1.3 mm × 1.0 mm, surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 1.8–5.5 V; must be decoupled with ≥1 µF ceramic capacitor near pin to ensure PSRR and transient response. |
| VOUT | Regulated output node | Delivers fixed 1.0 V; requires ≥2.2 µF X7R ceramic capacitor directly at pin for stability and low-noise operation. |
| GND | Power ground reference | Low-impedance return path for load and quiescent current; tie to quiet ground plane or output capacitor cathode to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ (250 nA) | Enables >10-year battery life in devices with <0.1% active duty cycle (e.g., environmental monitors). |
| Output discharge on shutdown | Active pull-down via integrated transistor (RDCH ≤ 100 Ω) clears VOUT within microseconds - prevents back-powering or latch-up in multi-supply systems. |
| Stable with 2.2 µF ceramic cap | Eliminates need for large, costly, aging-prone tantalum capacitors; improves long-term reliability and reduces board space by >50%. |
| Overcurrent protection | Foldback current limit (100 mA at RLOAD = 1 Ω) prevents thermal runaway during short-circuit events without requiring external fusing. |
| Wide input range (1.8–5.5 V) | Supports direct connection to harvested energy sources (e.g., 2.2 V thermoelectric generators) and legacy 5 V rails without pre-regulation. |
Applications
| Energy-Harvesting Sensor Nodes | Hearing Aids |
|---|---|
|
Use Scenario: Indoor light- or vibration-powered temperature/humidity sensor transmitting data every 5 minutes via sub-GHz RF. IC Role / Device Role: Primary 1.0 V supply for ultra-low-power MCU and RF transceiver during brief active bursts. Use Value: 250 nA IQ and 2.2 µF ceramic stability enable >5-year operation on a single 20 mAh thin-film battery charged by ambient energy. |
Use Scenario: Rechargeable in-the-ear hearing aid with real-time audio processing and Bluetooth LE streaming. IC Role / Device Role: Dedicated 1.0 V rail for DSP core and MEMS microphone bias, sequenced with discharge during sleep mode. Use Value: Output discharge prevents cross-conduction between 1.0 V and 1.8 V analog rails, eliminating audible pop artifacts during wake/sleep transitions. |
| Smart Wearable Bracelets | Implantable Medical Monitors |
|
Use Scenario: Fitness tracker with optical heart-rate sensor, accelerometer, and NFC interface powered by CR2032 coin cell. IC Role / Device Role: Single-output LDO supplying 1.0 V to sensor hub and BLE SoC during motion-triggered sampling. Use Value: 400 mV dropout allows full utilization of CR2032's 2.0–3.0 V discharge curve, extending runtime by 22% vs. conventional 200 mA LDOs. |
Use Scenario: Subcutaneous glucose monitor with 10-year operational lifetime requirement and zero maintenance. IC Role / Device Role: Safety-critical 1.0 V supply for analog front-end and low-power microcontroller, qualified per ISO 13485 design controls. Use Value: Guaranteed ±4% output tolerance and –40°C to +85°C operation ensure consistent sensor calibration across body temperature and storage conditions. |
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 max, 250 nA IQ, no output discharge, SOT-23-3 | Lacks active VOUT discharge - unsuitable where fast rail collapse is required for sequencing or safety. | Select when cost sensitivity outweighs discharge need and load current stays ≤200 mA. |
| Ricoh RP111N101D-TR-F | 1.0 V fixed, 300 mA max, 300 nA IQ, no output discharge, SOT-23-3 | Higher IQ (300 nA vs. 250 nA) and no discharge transistor - increases sleep energy and limits multi-rail control. | Choose only if footprint compatibility is mandatory and system-level discharge is handled externally. |
Compared with XC6210B102MR-G and RP111N101D-TR-F, the MCP1812AT-010/TT uniquely combines 300 mA capability, 250 nA IQ, and integrated output discharge in the same 3-lead SOT-23 package - delivering superior energy efficiency and system-level sequencing control for next-generation medical and IoT edge nodes.
Availability
MCP1812AT-010/TT is available at Aetrix Electronics and suitable for energy-harvesting sensor nodes, hearing aids, and smart wearable bracelets requiring stable component supply with guaranteed long-term manufacturability and traceable sourcing.
Supply support for MCP1812AT-010/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 Inc. is a leading provider of microcontrollers, analog components, and Flash-IP solutions, serving automotive, industrial, and consumer markets with high-reliability silicon and development tools.
The MCP1811/1812 family was designed specifically for ultra-low-power, battery- and energy-harvesting–powered applications demanding nanoscale quiescent current, small footprint, and robust performance across wide temperature and load ranges.
FAQ
What is the maximum input voltage rating for the MCP1812AT-010/TT?
The MCP1812AT-010/TT has an absolute maximum input voltage rating of +6.0 V. However, its specified operating input range is 1.8 V to 5.5 V. Exceeding 5.5 V may cause permanent damage or violate parametric guarantees - always observe the 5.5 V upper limit in functional designs. The 6.0 V rating is a stress limit, not an operational specification.
Does the MCP1812AT-010/TT require an external shutdown pull-up resistor?
Yes - the MCP1812AT-010/TT SHDN pin is internally uncommitted and requires an external pull-up resistor (typically 1 MΩ to VIN) to maintain normal operation. Without it, the device remains in shutdown mode with only ~10 nA supply current. This design enables simple, low-leakage control via microcontroller GPIO or mechanical switch.
Can the MCP1812AT-010/TT be used with a 1 µF output capacitor?
No - the MCP1812AT-010/TT requires a minimum of 2.2 µF ceramic (X7R) output capacitance for guaranteed stability, as confirmed in DS20006088C, Table 1 and Section 4.2. Using 1 µF risks oscillation, poor load transient response, and failure to meet PSRR or noise specifications. The 1 µF value applies only to the 150 mA MCP1811X series.
Is the MCP1812AT-010/TT pin-compatible with other variants in the MCP1812 family?
Yes - all MCP1812X variants (e.g., MCP1812AT-120/TT, MCP1812AT-330/TT) share identical 3-lead SOT-23 pinout (VIN, VOUT, GND) and thermal pad layout. Only the output voltage and internal feedback network differ. No PCB redesign is needed when changing fixed-output versions within the same package.
What is the thermal resistance (θJA) of the MCP1812AT-010/TT in SOT-23?
The MCP1812AT-010/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 layout practices - adding thermal vias under the pad or increasing copper area can reduce θJA by up to 30% in optimized designs.
MCP1812AT-010/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):
- 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:
- SOT-23-3
MCP1812AT-010/TT FAQ
1.How can I place an order for MCP1812AT-010/TT through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1812AT-010/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 MCP1812AT-010/TT reliable?
The price and inventory of MCP1812AT-010/TT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1812AT-010/TT is usually 5 days.
3.What payment methods are accepted for MCP1812AT-010/TT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1812AT-010/TT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1812AT-010/TT?
MCP1812AT-010/TT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1812AT-010/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 MCP1812AT-010/TT?
For technical support, including MCP1812AT-010/TT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1812AT-010/TT requirements.
6.How does Aetrix verify that MCP1812AT-010/TT is sourced from the original manufacturer or authorized distributors?
All MCP1812AT-010/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 MCP1812AT-010/TT meets industry standards.
7.What is the process for return or replacement of MCP1812AT-010/TT?
All MCP1812AT-010/TT units undergo pre-shipment inspection (PSI). If there is an issue with MCP1812AT-010/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 MCP1812AT-010/TT part is unused and in its original packaging.
Return procedure for MCP1812AT-010/TT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP1812AT-010/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…
