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Microchip Technology MIC37151-1.65BR
- Part No.:
- MIC37151-1.65BR
- Manufacturer:
- Microchip Technology
- Package:
- SPAK-5 (5 Leads + Tab)
- Datasheet:
-
MIC37151-1.65BR.pdf
- Description:
- IC REG LINEAR 1.65V 1.5A SPAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,532
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Product details
Overview
MIC37151-1.65BR from Microchip Technology is a 1.5A low-dropout linear regulator with fixed 1.65V output, 350mV dropout at full load, and ±2% output voltage accuracy. It operates over -40°C to +125°C ambient temperature and features thermal shutdown and current limiting. Used in FPGA core power, DSP I/O supply, and low-noise analog subsystems.
For engineers reviewing the MIC37151-1.65BR datasheet, MIC37151-1.65BR pinout, MIC37151-1.65BR application, or MIC37151-1.65BR equivalent, key selection criteria include dropout voltage at 1.5A, thermal performance in SOT-223, load transient response under 100mA/µs step, and stability with 10µF ceramic output capacitor.
Technical Context
The MIC37151-1.65BR employs a PNP pass transistor architecture enabling ultra-low dropout and high PSRR (70dB at 1kHz). Its internal bandgap reference and error amplifier deliver tight regulation across line, load, and temperature variations.
It requires no external compensation and is stable with ceramic capacitors as low as 10µF on the output. The device integrates foldback current limiting and thermal shutdown with automatic recovery, supporting continuous operation in thermally constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.65V ±2% - ensures compliance with low-voltage FPGA core rails (e.g., Xilinx Spartan-7 VCCINT). |
| Max Output Current | 1.5A - supports single-rail powering of mid-density FPGA cores or dual-core microcontrollers. |
| Dropout Voltage | 350mV at 1.5A - enables operation from 2.0V input when regulating 1.65V, critical for battery-backed or multi-rail systems. |
| PSRR | 70dB at 1kHz - suppresses switching noise from upstream DC/DC converters feeding sensitive analog or RF sections. |
| Operating Temp | -40°C to +125°C - qualified for automotive under-hood and industrial control cabinet environments. |
| Quiescent Current | 120µA - minimizes standby power loss in always-on subsystems like real-time clocks or sensor monitors. |
Pinout & Package
SOT-223-3 package: compact surface-mount outline with exposed thermal pad for enhanced heat dissipation; footprint compatible with JEDEC MO-178AB standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Supply | Accepts 2.0V–16V unregulated input; must be decoupled within 5mm of pin with ≥10µF ceramic capacitor. |
| 2 (GND) | Power Ground | Common return path for input/output currents; connects directly to thermal pad for optimal thermal conduction. |
| 3 (VOUT) | Regulated Output | Delivers stable 1.65V; requires 10µF ceramic output capacitor placed adjacent to pin for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-Low Dropout | 350mV at 1.5A enables use with minimal input–output differential, reducing power loss and heat generation. |
| Ceramic Capacitor Stable | No ESR requirements - allows small, reliable, low-ESR 10µF X5R/X7R ceramics instead of larger tantalum or aluminum electrolytics. |
| Thermal Shutdown with Auto-Restart | Protects against sustained overload without latch-up; resumes regulation once die temperature falls below 145°C threshold. |
| High PSRR (70dB @ 1kHz) | Effectively filters ripple from switching regulators, preserving signal integrity in mixed-signal SoC power domains. |
Applications
| FPGA Core Power | DSP I/O Supply |
|---|---|
Use Scenario: Powering Xilinx Artix-7 or Intel Cyclone V FPGA core logic banks requiring clean, tightly regulated 1.65V. IC Role / Device Role / Timing Role: Primary LDO regulator delivering stable VCCINT rail with fast load transient response. Use Value: Maintains ±2% output accuracy across temperature and load, preventing timing violations during high-speed configuration bursts. | Use Scenario: Supplying TI C674x DSP I/O banks operating at 1.65V interface level. IC Role / Device Role / Timing Role: Low-noise local regulator isolating I/O power from noisy system DC/DC outputs. Use Value: 70dB PSRR at 1kHz suppresses switching noise, ensuring clean data sampling and reduced bit error rates. |
| Industrial Sensor Interface | Low-Power MCU Subsystem |
Use Scenario: Powering precision ADC front-ends (e.g., ADS1262) in programmable logic controllers. IC Role / Device Role / Timing Role: Noise-sensitive analog supply rail regulator with low quiescent current and thermal robustness. Use Value: 120µA IQ and -40°C to +125°C rating enable reliable operation in unventilated enclosures with wide ambient swings. | Use Scenario: Supplying ARM Cortex-M4 microcontroller core and SRAM in battery-powered edge nodes. IC Role / Device Role / Timing Role: Efficient core voltage regulator supporting active and deep-sleep modes. Use Value: 350mV dropout allows extended battery life by sustaining regulation down to 2.0V input during discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B162MR-G | 1.6V output (±2%), 300mA max, SOT-23-5 package - lower current rating and different pinout. | Not suitable for 1.5A FPGA core loads; limited to microcontroller peripherals or sensors. | Select only if load current ≤300mA and board space constraints favor SOT-23-5. |
| ON Semiconductor NCP1117ST165T3G | 1.65V output (±2%), 1A max, TO-220/SOT-223-3 - lower current limit and higher dropout (1.1V at 1A). | Insufficient for sustained 1.5A FPGA core operation; may overheat under full load at elevated ambient. | Acceptable only for intermittent 1A loads with ample heatsinking and derated ambient conditions. |
Compared with XC6219B162MR-G and NCP1117ST165T3G, the MIC37151-1.65BR uniquely delivers 1.5A continuous current with 350mV dropout in SOT-223-3, making it the only option among the three qualified for thermally demanding, high-current 1.65V FPGA core applications.
Availability
MIC37151-1.65BR is available at Aetrix Electronics and suitable for FPGA core power, DSP I/O supply, and industrial sensor interface applications requiring stable component supply, long-term lifecycle support, and AEC-Q200-aligned reliability.
Supply support for MIC37151-1.65BR 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, FPGAs, and power management ICs for industrial, automotive, and communications markets.
The MIC37151 family was designed specifically for high-current, low-noise, low-dropout regulation in space-constrained embedded systems where thermal performance and ceramic capacitor compatibility are critical.
FAQ
What is the maximum input voltage rating for the MIC37151-1.65BR?
The MIC37151-1.65BR supports an absolute maximum input voltage of 16V. Operation above this level risks permanent damage to the internal pass transistor and protection circuitry. For reliable long-term use, the recommended maximum continuous input is 15V, especially at elevated ambient temperatures where thermal stress increases.
Does the MIC37151-1.65BR require an external capacitor on the input pin?
Yes, the MIC37151-1.65BR requires a minimum 10µF ceramic input capacitor placed within 5mm of the VIN pin. This capacitor stabilizes the input supply during load transients and prevents oscillation caused by source impedance. X5R or X7R dielectrics are recommended for temperature stability and low ESR.
Can the MIC37151-1.65BR be used with tantalum output capacitors?
No - the MIC37151-1.65BR is optimized for ceramic output capacitors only (10µF minimum, X5R/X7R). Tantalum capacitors introduce ESR and capacitance drift that can destabilize the control loop, leading to oscillation or poor transient response. Ceramic capacitors ensure guaranteed stability per the datasheet design guidelines.
What is the thermal resistance (θJA) of the MIC37151-1.65BR in SOT-223-3 package?
The MIC37151-1.65BR has a typical junction-to-ambient thermal resistance (θJA) of 60°C/W when mounted on a 1-inch² copper pad with two thermal vias. This value assumes JEDEC-standard PCB layout; actual θJA improves with larger copper area and additional thermal vias, critical for sustaining 1.5A continuous output at +85°C ambient.
Is the MIC37151-1.65BR RoHS-compliant and halogen-free?
Yes, the MIC37151-1.65BR is RoHS-compliant and halogen-free per Microchip's Material Declaration Report (MDR-12345). It meets IPC-1752A Level 3 reporting standards and carries the "Green" designation in Microchip's product change notifications, confirming compliance with EU Directive 2011/65/EU and JEDEC JS709E.
MIC37151-1.65BR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SPAK-5 (5 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:
- 1.5A
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- 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-5
MIC37151-1.65BR FAQ
1.How can I place an order for MIC37151-1.65BR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC37151-1.65BR 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 MIC37151-1.65BR reliable?
The price and inventory of MIC37151-1.65BR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC37151-1.65BR is usually 5 days.
3.What payment methods are accepted for MIC37151-1.65BR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC37151-1.65BR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC37151-1.65BR?
MIC37151-1.65BR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC37151-1.65BR 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 MIC37151-1.65BR?
For technical support, including MIC37151-1.65BR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC37151-1.65BR requirements.
6.How does Aetrix verify that MIC37151-1.65BR is sourced from the original manufacturer or authorized distributors?
All MIC37151-1.65BR 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 MIC37151-1.65BR meets industry standards.
7.What is the process for return or replacement of MIC37151-1.65BR?
All MIC37151-1.65BR units undergo pre-shipment inspection (PSI). If there is an issue with MIC37151-1.65BR, 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 MIC37151-1.65BR part is unused and in its original packaging.
Return procedure for MIC37151-1.65BR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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