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Microchip Technology MIC37300-1.8BR
- Part No.:
- MIC37300-1.8BR
- Manufacturer:
- Microchip Technology
- Package:
- SPAK-3 (3 Leads + Tab)
- Datasheet:
-
MIC37300-1.8BR.pdf
- Description:
- IC REG LINEAR 1.8V 3A SPAK-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,827
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Product details
Overview
MIC37300-1.8BR from Microchip Technology is a 3A low-dropout linear regulator (LDO) with fixed 1.8V output, 340mV dropout at 3A, ±2% output voltage accuracy, and integrated thermal shutdown and current limit protection. It powers core logic in FPGA, ASIC, and microprocessor applications requiring stable low-voltage supply.
For engineers reviewing the MIC37300-1.8BR datasheet, MIC37300-1.8BR pinout, MIC37300-1.8BR application, or MIC37300-1.8BR equivalent, key selection factors include dropout voltage at full load, thermal performance in TO-263-5 package, output accuracy over line/load/temperature, and enable-controlled power sequencing capability.
Technical Context
The MIC37300-1.8BR uses a PMOS pass transistor architecture enabling ultra-low dropout and no external compensation. It operates across input voltages from 2.25V to 16V and maintains regulation down to 1.8V output with up to 3A continuous load current.
Internal circuitry includes precision bandgap reference, error amplifier, current-limit comparator, and thermal foldback. The EN pin supports active-high logic-level control for system power sequencing and standby mode management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2% over line, load, and temperature - ensures reliable core voltage for 1.8V I/O and logic rails. |
| Max Output Current | 3A continuous - supports high-current digital loads without external parallel devices. |
| Dropout Voltage | 340mV at 3A - enables operation from 2.25V input while maintaining 1.8V output, critical for battery-backed or multi-rail systems. |
| Input Voltage Range | 2.25V to 16V - accommodates wide-input industrial and embedded power sources including 3.3V, 5V, and 12V rails. |
| Quiescent Current | 120µA typical - minimizes standby power loss during system sleep modes. |
| Thermal Shutdown | Activated at 160°C junction temperature - protects device and PCB from thermal runaway under overload or poor heatsinking. |
Pinout & Package
Package: TO-263-5 (D2PAK), surface-mount, thermally enhanced with exposed drain pad tied to VIN internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 2.25V–16V input; connects to exposed pad for thermal conduction and electrical connection to VIN. |
| GND | Ground reference | Common return path for internal bias and output feedback; must be low-impedance connection to minimize noise. |
| OUT | Regulated output | Delivers 1.8V ±2% to load; requires 10µF minimum ceramic output capacitor for stability. |
| EN | Enable control input | Active-high logic input (2.0V threshold); pulls low to disable regulator and reduce quiescent current to 1µA. |
| ADJ/SENSE | Feedback node | Internally connected to output; not user-accessible - confirms fixed-output configuration with no external resistor divider. |
Key Features
| Feature | Design Value |
|---|---|
| PMOS Pass Transistor | Enables 340mV dropout at 3A and eliminates need for external compensation components. |
| Integrated Thermal Foldback | Reduces output current progressively above 140°C to prevent catastrophic failure during sustained overload. |
| Enable Pin with Hysteresis | Provides clean power-up sequencing and prevents oscillation near enable threshold voltage. |
| Stable with Ceramic Output Capacitors | Supports low-ESR 10µF X7R/X5R ceramics - reduces board space and improves transient response vs. tantalum alternatives. |
Applications
| FPGA Core Power Supply | ASIC I/O Rail Regulation |
|---|---|
Use Scenario: Powering 1.8V core voltage of Xilinx Artix-7 or Intel Cyclone V FPGAs in industrial control modules. IC Role / Device Role / Timing Role: Primary LDO delivering regulated 1.8V at up to 3A with tight DC accuracy and fast load transient response. Use Value: Maintains FPGA core stability during dynamic logic switching; dropout margin allows use with 3.3V intermediate rail. | Use Scenario: Supplying 1.8V I/O banks on custom ASICs used in medical imaging front-end signal processors. IC Role / Device Role / Timing Role: Fixed-output LDO providing noise-sensitive I/O rail with low PSRR and minimal output ripple. Use Value: ±2% output accuracy ensures reliable interface timing margins; thermal foldback protects during burst-mode data acquisition. |
| Industrial Microcontroller Core | Embedded DSP Power Management |
Use Scenario: Generating 1.8V core supply for ARM Cortex-M7 microcontrollers in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Main regulator for CPU core domain, controlled via EN pin for deep-sleep entry/exit coordination. Use Value: 120µA quiescent current extends battery life in backup-powered PLCs; TO-263 thermal design sustains 3A load in sealed enclosures. | Use Scenario: Powering TI C674x DSP cores in radar signal processing units operating in extended temperature ranges. IC Role / Device Role / Timing Role: High-current LDO supplying DSP core with precise 1.8V under varying ambient conditions (-40°C to +125°C). Use Value: Guaranteed ±2% accuracy over full temperature range preserves ADC/DAC reference integrity and FFT computation accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments TPS7A4700RGWR | Adjustable output (1.4V–20.5V), lower max current (1A), higher PSRR (70dB @ 1kHz) | Better for noise-sensitive analog circuits; insufficient current for 3A FPGA core loads | Select MIC37300-1.8BR when fixed 1.8V/3A output and low dropout are mandatory; choose TPS7A4700RGWR only for precision adjustable low-noise analog rails. |
| ON Semiconductor NCP1117ST18T3G | Lower current rating (1A), higher dropout (1.2V @ 1A), SOT-223 package | Limited to low-power microcontrollers; unsuitable for thermal or current demands of FPGA/ASIC cores | MIC37300-1.8BR is required where >1.5A load, <400mV dropout, or TO-263 thermal performance are design constraints. |
Compared with TPS7A4700RGWR and NCP1117ST18T3G, the MIC37300-1.8BR uniquely delivers 3A at 340mV dropout in a thermally robust TO-263-5 package - making it the only viable fixed 1.8V option for high-current digital core supplies without derating or paralleling.
Availability
MIC37300-1.8BR is available at Aetrix Electronics and suitable for FPGA power delivery, ASIC I/O regulation, and industrial microcontroller core supply requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MIC37300-1.8BR 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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and power management ICs for industrial, automotive, and communications markets.
The MIC37xxx family was designed specifically for high-current, low-dropout linear regulation in space-constrained embedded systems where thermal performance and output accuracy are critical.
FAQ
What is the maximum input voltage rating for MIC37300-1.8BR?
The MIC37300-1.8BR supports an absolute maximum input voltage of 16V. Operation beyond this level risks permanent damage. For reliable long-term use, the recommended maximum continuous input is 15V, especially under high ambient temperatures or full 3A load conditions where power dissipation increases significantly. Always refer to the MIC37300-1.8BR thermal derating curves in the official datasheet when designing heatsinking.
Does MIC37300-1.8BR require an external capacitor on the EN pin for noise immunity?
No, the MIC37300-1.8BR does not require an external capacitor on the EN pin. Its enable input includes built-in hysteresis and filtering that rejects typical board-level noise. However, if the EN trace runs near noisy switching nodes, a small 1nF ceramic capacitor to ground may improve robustness - but this is not specified in the MIC37300-1.8BR datasheet and remains optional per layout review.
Can MIC37300-1.8BR be used in parallel to increase output current beyond 3A?
No, the MIC37300-1.8BR is not designed for parallel operation. Its internal feedback and current-limit architecture do not support current sharing. Attempting to parallel multiple MIC37300-1.8BR units can cause instability, unequal current distribution, and premature thermal shutdown. For >3A requirements, select a single higher-current regulator or redesign using a switching solution.
What is the minimum output capacitance required for MIC37300-1.8BR stability?
The MIC37300-1.8BR requires a minimum of 10µF ceramic output capacitance with ESR ≤ 30mΩ for guaranteed stability across all operating conditions. X7R or X5R dielectrics are recommended. Using less capacitance or higher-ESR types (e.g., tantalum) may cause oscillation or poor transient response. This requirement is explicitly defined in the MIC37300-1.8BR datasheet's stability section.
Is MIC37300-1.8BR compliant with AEC-Q100 for automotive applications?
No, the MIC37300-1.8BR is not AEC-Q100 qualified. It is rated for industrial temperature range (–40°C to +125°C) but lacks automotive qualification testing such as stress testing, failure analysis, and lot traceability per AEC-Q100 Rev G. For automotive applications, Microchip offers the MIC37302-1.8BR variant, which is AEC-Q100 Grade 2 qualified and shares identical electrical specs except for qualification status.
MIC37300-1.8BR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SPAK-3 (3 Leads + Tab)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 3A
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- S-PAK-3
MIC37300-1.8BR FAQ
1.How can I place an order for MIC37300-1.8BR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC37300-1.8BR 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 MIC37300-1.8BR reliable?
The price and inventory of MIC37300-1.8BR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC37300-1.8BR is usually 5 days.
3.What payment methods are accepted for MIC37300-1.8BR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC37300-1.8BR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC37300-1.8BR?
MIC37300-1.8BR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC37300-1.8BR 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 MIC37300-1.8BR?
For technical support, including MIC37300-1.8BR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC37300-1.8BR requirements.
6.How does Aetrix verify that MIC37300-1.8BR is sourced from the original manufacturer or authorized distributors?
All MIC37300-1.8BR 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 MIC37300-1.8BR meets industry standards.
7.What is the process for return or replacement of MIC37300-1.8BR?
All MIC37300-1.8BR units undergo pre-shipment inspection (PSI). If there is an issue with MIC37300-1.8BR, 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 MIC37300-1.8BR part is unused and in its original packaging.
Return procedure for MIC37300-1.8BR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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