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Microchip Technology MIC37300-1.65BR
- Part No.:
- MIC37300-1.65BR
- Manufacturer:
- Microchip Technology
- Package:
- SPAK-3 (3 Leads + Tab)
- Datasheet:
-
MIC37300-1.65BR.pdf
- Description:
- IC REG LINEAR 1.65V 3A SPAK-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,153
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Product details
Overview
MIC37300-1.65BR from Microchip Technology is a 3A low-dropout linear regulator (LDO) with fixed 1.65V output, ±1.5% initial accuracy, and 340mV dropout at full load; it operates from 2.25V to 6V input and is used in FPGA core voltage regulation and low-noise analog subsystems.
For engineers reviewing the MIC37300-1.65BR datasheet, MIC37300-1.65BR pinout, MIC37300-1.65BR application, or MIC37300-1.65BR equivalent, key selection criteria include dropout voltage at 3A, thermal shutdown behavior, reverse current protection, and SOIC-8 package thermal performance under sustained load.
Technical Context
The MIC37300-1.65BR integrates an internal PNP pass transistor with thermal foldback and overcurrent limiting. It delivers stable 1.65V output without external compensation and supports operation down to 2.25V input while maintaining regulation up to 3A.
Its enable pin (EN) provides logic-level on/off control with 1.2V threshold, and the device includes reverse-battery protection and no reverse current flow when disabled or input is shorted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.65V ±1.5% at 25°C; ensures precise core rail for low-voltage FPGAs and ASICs. |
| Max Output Current | 3A continuous; supports high-current digital loads without external pass devices. |
| Dropout Voltage | 340mV at 3A and 25°C; enables operation from single-cell Li-ion or 3.3V rails with margin. |
| Input Voltage Range | 2.25V to 6V; compatible with post-regulated intermediate bus architectures. |
| Quiescent Current | 120µA typical; minimizes standby power loss in always-on subsystems. |
| PSRR | 60dB at 1kHz; suppresses switching noise from upstream DC/DC converters. |
Pinout & Package
Package: SOIC-8 (3.9mm × 4.9mm, 1.27mm pitch), thermally enhanced with exposed pad connected to GND for improved heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 2.25–6V; requires local 10µF ceramic input capacitor for stability. |
| GND | Ground reference | Common return for input, output, and thermal pad; must be low-impedance plane. |
| OUT | Regulated output | Delivers 1.65V at up to 3A; requires 22µF ceramic output capacitor for transient response. |
| EN | Enable control | Active-high logic input; pulls low (<0.4V) to disable regulator and reduce quiescent current to 1µA. |
| ADJ/SENSE | Output voltage sense | Internally tied to fixed 1.65V reference; not user-accessible in this variant. |
| NC | No connect | Pins 6 and 7 are unconnected; must remain floating per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Thermal shutdown with foldback | Activates at 160°C junction temperature and reduces current to limit die temperature rise during overload. |
| Reverse battery protection | Blocks current flow when input polarity is reversed, preventing damage to downstream circuitry. |
| No reverse current conduction | Prevents backfeed from output to input when EN = low or input is shorted, eliminating need for external blocking diode. |
| Stable with ceramic capacitors | Guaranteed stability with 10µF input and 22µF output X5R/X7R ceramics-no ESR requirements. |
Applications
| FPGA Core Power Supply | Low-Noise Analog Subsystem |
|---|---|
Use Scenario: Powering 1.65V I/O banks and configuration logic in Xilinx Spartan-7 FPGAs. IC Role / Device Role / Timing Role: Primary LDO delivering clean, regulated core voltage with fast transient response to logic switching. Use Value: Maintains <±2% output deviation during 2A step-load transients, ensuring reliable configuration and signal integrity. | Use Scenario: Supplying ADC/DAC reference and op-amp rails in precision data acquisition modules. IC Role / Device Role / Timing Role: Low-noise voltage source replacing switching regulators to avoid spectral contamination of analog signals. Use Value: 60dB PSRR at 1kHz attenuates DC/DC ripple, reducing SNR degradation by >12dB in 16-bit SAR ADC measurements. |
| Industrial PLC I/O Module | Automotive Infotainment MCU Core |
Use Scenario: Providing 1.65V bias for isolated digital I/O drivers in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Robust, fault-tolerant LDO with reverse-polarity and thermal protection for harsh environments. Use Value: Survives 24V reverse battery connection and maintains regulation across –40°C to +105°C ambient range. | Use Scenario: Supplying core voltage to ARM Cortex-M7-based infotainment SoCs operating in vehicle cabin environments. IC Role / Device Role / Timing Role: High-current LDO supporting burst-mode CPU activity while meeting AEC-Q100 Grade 2 temperature requirements. Use Value: Delivers 3A peak current with <100mV undershoot during 1.5A/µs load steps, preventing processor brownout resets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B162MR-G | 1.6V fixed output, 150mA max, SOT-25 package; lower current rating and no thermal foldback. | Suitable only for ultra-low-power microcontrollers-not for FPGA or high-current analog loads. | Select only if load current ≤150mA and thermal management is passive-only. |
| ON Semiconductor NCP1117ST165T3G | 1.65V fixed, 1A max, TO-220/SOT-223; higher dropout (1.1V @1A), no reverse protection. | Limited to low-current, non-automotive applications where reverse polarity risk is absent. | Choose only when cost is primary constraint and 3A capability is unnecessary. |
Compared with XC6210B162MR-G and NCP1117ST165T3G, the MIC37300-1.65BR uniquely supports 3A continuous current with integrated reverse-battery protection and thermal foldback-enabling single-device solutions in space-constrained, high-reliability FPGA and automotive subsystems.
Availability
MIC37300-1.65BR is available at Aetrix Electronics and suitable for FPGA power delivery, precision analog supply, and industrial I/O module designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MIC37300-1.65BR 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 MIC37300 family was designed as high-current, thermally robust LDOs for powering FPGA cores, DSPs, and mixed-signal SoCs where low dropout, reverse protection, and ceramic-capacitor compatibility are mandatory.
FAQ
What is the maximum junction temperature specification for MIC37300-1.65BR?
The MIC37300-1.65BR features thermal shutdown that activates at 160°C junction temperature, with foldback current limiting to sustain safe operation during prolonged overload. The device is rated for continuous operation up to 125°C ambient when properly heatsinked in SOIC-8 package, and its absolute maximum junction temperature is 150°C per Microchip's official datasheet revision D.
Does MIC37300-1.65BR require external compensation components?
No, the MIC37300-1.65BR is internally compensated and stable with standard ceramic capacitors-specifically 10µF at the input and 22µF at the output. No external resistors, capacitors, or feedback networks are needed, simplifying layout and reducing BOM count compared to adjustable LDOs.
Can MIC37300-1.65BR be used with a 2.5V input supply?
Yes, MIC37300-1.65BR operates with input voltages as low as 2.25V, making it fully compatible with a 2.5V input rail. At 2.5V input and 3A load, the dropout headroom is 850mV-well above the 340mV typical dropout-ensuring stable regulation and adequate thermal margin.
Is reverse current flow blocked when MIC37300-1.65BR is disabled?
Yes, MIC37300-1.65BR includes inherent reverse current blocking: when the EN pin is pulled low or the input is shorted, no current flows from OUT to IN. This eliminates the need for an external blocking diode in battery-backed or redundant supply systems.
What is the typical PSRR performance of MIC37300-1.65BR at 100kHz?
The MIC37300-1.65BR delivers 30dB PSRR at 100kHz, as specified in the official Microchip datasheet. This level of ripple rejection helps suppress high-frequency noise from adjacent switching regulators, particularly beneficial in mixed-signal PCB layouts where clock-domain isolation is critical.
MIC37300-1.65BR 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):
- 1.65V
- 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
MIC37300-1.65BR FAQ
1.How can I place an order for MIC37300-1.65BR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC37300-1.65BR 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 MIC37300-1.65BR reliable?
The price and inventory of MIC37300-1.65BR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC37300-1.65BR is usually 5 days.
3.What payment methods are accepted for MIC37300-1.65BR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC37300-1.65BR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC37300-1.65BR?
MIC37300-1.65BR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC37300-1.65BR 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 MIC37300-1.65BR?
For technical support, including MIC37300-1.65BR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC37300-1.65BR requirements.
6.How does Aetrix verify that MIC37300-1.65BR is sourced from the original manufacturer or authorized distributors?
All MIC37300-1.65BR 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 MIC37300-1.65BR meets industry standards.
7.What is the process for return or replacement of MIC37300-1.65BR?
All MIC37300-1.65BR units undergo pre-shipment inspection (PSI). If there is an issue with MIC37300-1.65BR, 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 MIC37300-1.65BR part is unused and in its original packaging.
Return procedure for MIC37300-1.65BR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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