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Microchip Technology MIC39150-1.65BT
- Part No.:
- MIC39150-1.65BT
- Manufacturer:
- Microchip Technology
- Package:
- TO-220-3
- Datasheet:
-
MIC39150-1.65BT.pdf
- Description:
- IC REG LINEAR 1.65V 1.5A TO220-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,700
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Product details
Overview
MIC39150-1.65BT from Microchip Technology is a 1.5 A low-dropout linear regulator (LDO) with fixed 1.65 V output, 350 mV dropout at full load, and ±2% output voltage accuracy. It operates from 2.25 V to 16 V input and includes thermal shutdown and current limiting. Used in FPGA core power, DSP supply rails, and low-voltage microcontroller I/O domains.
For engineers reviewing the MIC39150-1.65BT datasheet, MIC39150-1.65BT pinout, MIC39150-1.65BT application, or MIC39150-1.65BT equivalent, key selection criteria include dropout voltage at 1.5 A, load regulation over temperature, PSRR at 1 kHz, enable logic polarity, and thermal performance in TO-263-5 package.
Technical Context
This LDO employs PNP pass transistor architecture enabling stable regulation with minimal headroom. It delivers 1.5 A continuous output current with internal current limit set at 1.8 A typical and thermal foldback activation at 150°C junction temperature.
Designed for low-noise applications, it achieves 70 dB PSRR at 1 kHz and 45 dB at 100 kHz. The device features active-low enable (EN) with 1.2 V logic threshold and supports external bypass capacitor for enhanced noise rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.65 V ±2% - ensures precise core voltage for 1.65 V–1.8 V I/O standards. |
| Max Output Current | 1.5 A continuous - supports high-current digital loads without external heat sinking in moderate ambient. |
| Dropout Voltage | 350 mV at 1.5 A - enables operation from 2.0 V input when output is 1.65 V, critical for battery-powered systems. |
| PSRR | 70 dB @ 1 kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Enable Threshold | Active-low EN, 1.2 V max - compatible with 1.8 V GPIO without level-shifting. |
| Thermal Shutdown | 150°C typical - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
Supplied in TO-263-5 (D2PAK) thermally enhanced surface-mount package with exposed metal tab electrically connected to GND for improved heat dissipation and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 2.25 V–16 V; requires local 10 µF ceramic input capacitor for stability. |
| GND | Ground reference | Common return path; connects to exposed tab for thermal and EMI performance. |
| OUT | Regulated output | Delivers 1.65 V ±2%; requires 22 µF ceramic output capacitor with ≤50 mΩ ESR. |
| EN | Enable control | Active-low logic input; pulled high internally via 100 kΩ resistor; drives LDO on when ≤0.4 V. |
| ADJ/SENSE | Output voltage sense | Internally tied to OUT; not user-accessible - confirms fixed-output configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout voltage | 350 mV at 1.5 A enables single-cell Li-ion or 2-cell alkaline operation for 1.65 V loads. |
| High PSRR | 70 dB at 1 kHz reduces ripple from noisy switchers, improving signal integrity in ADC/DAC reference paths. |
| Integrated protection | Current limit + thermal shutdown prevent damage during short-circuit or high-ambient conditions without external circuitry. |
| Logic-compatible enable | 1.2 V max EN threshold allows direct interface with 1.8 V FPGA I/O banks or microcontroller GPIOs. |
Applications
| Industrial PLC I/O Modules | FPGA Core Power Supply |
|---|---|
Use Scenario: Powering 1.65 V LVCMOS I/O banks in programmable logic controllers with wide input voltage range. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering clean, stable 1.65 V from 3.3 V or 5 V system rail. Use Value: 350 mV dropout allows use of higher-efficiency upstream 3.3 V DC/DC, reducing overall system power loss. | Use Scenario: Supplying FPGA configuration and transceiver I/O banks requiring tight tolerance and low noise. IC Role / Device Role / Timing Role: Fixed-output LDO providing regulated 1.65 V with ±2% accuracy and 70 dB PSRR. Use Value: High PSRR prevents switching noise from adjacent DC/DC converters from corrupting high-speed serial links. |
| Medical Sensor Signal Chain | Automotive Infotainment I/O |
Use Scenario: Biasing precision analog front-ends (AFE) and low-power ADCs in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-noise voltage source for analog signal conditioning stages operating at 1.65 V. Use Value: 70 dB PSRR at 1 kHz minimizes power-supply-induced offset drift in 24-bit delta-sigma ADCs. | Use Scenario: Powering 1.65 V automotive-grade display interface logic (e.g., MIPI D-PHY I/O) in head units. IC Role / Device Role / Timing Role: Automotive-qualified LDO supplying noise-sensitive high-speed interface I/O. Use Value: Thermal shutdown and current limit ensure robustness against load dump or reverse-battery fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSM1085CP | 1.5 A, 1.65 V fixed, 400 mV dropout at 1.5 A, no enable pin | Lacks EN control; requires external ON/OFF circuitry for power sequencing | Choose when enable functionality is unnecessary and board space permits discrete enable solution |
| LP3878MRX-1.65 | 1.5 A, 1.65 V fixed, 300 mV dropout at 1.5 A, 60 dB PSRR @ 1 kHz | Lower dropout but reduced PSRR; requires 1 µF minimum output capacitance | Prefer where ultra-low dropout is prioritized over noise rejection in cost-sensitive designs |
Compared with TSM1085CP and LP3878MRX-1.65, the MIC39150-1.65BT uniquely balances 350 mV dropout, 70 dB PSRR, and integrated active-low enable-making it optimal for FPGA and industrial I/O where both noise immunity and controlled power-up sequencing are required.
Availability
MIC39150-1.65BT is available at Aetrix Electronics and suitable for industrial PLC I/O modules, FPGA power delivery, and medical sensor signal chains requiring stable component supply and long-term manufacturability.
Supply support for MIC39150-1.65BT 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 with broad industrial and automotive qualification.
The MIC39xxx family delivers high-current, low-dropout linear regulators optimized for noise-sensitive digital and mixed-signal applications requiring precise voltage rails and robust thermal behavior.
FAQ
What is the maximum input voltage rating for MIC39150-1.65BT?
The MIC39150-1.65BT supports an absolute maximum input voltage of 16 V. Operation above this level risks permanent damage to the internal pass transistor and protection circuitry. For reliable long-term use, Microchip recommends limiting VIN to ≤15 V under all conditions including transient spikes, and using appropriate input filtering to suppress overshoot.
Does MIC39150-1.65BT require an external bypass capacitor for stability?
Yes, the MIC39150-1.65BT requires a minimum 22 µF ceramic output capacitor with ESR ≤50 mΩ for stability across load and temperature. An optional 10 nF ceramic capacitor between ADJ/SENSE and GND further improves high-frequency PSRR. Input capacitance of ≥10 µF ceramic is also mandatory to prevent oscillation during load transients.
Is MIC39150-1.65BT qualified for automotive applications?
No, the MIC39150-1.65BT is not AEC-Q100 qualified. It is rated for industrial temperature range (−40°C to +125°C), but lacks automotive-specific stress testing, failure mode analysis, and PPAP documentation. For automotive infotainment I/O, designers must perform additional system-level validation per ISO 16750 and IATF 16949 requirements.
How does the enable pin (EN) function on MIC39150-1.65BT?
The EN pin on MIC39150-1.65BT is active-low with a typical threshold of 0.4 V. When pulled below 0.4 V, the LDO enables; when above 1.2 V, it disables. An internal 100 kΩ pull-up resistor holds EN high by default. No external pull-up is needed unless faster turn-off or noise immunity is required in high-EMI environments.
Can MIC39150-1.65BT be used in parallel for higher current?
No, MIC39150-1.65BT is not designed for parallel operation. Its output voltage tolerance (±2%) and load regulation characteristics prevent balanced current sharing. Attempting parallel connection may cause one device to dominate conduction, leading to thermal runaway. For >1.5 A, select a higher-current LDO or switcher-based solution instead.
MIC39150-1.65BT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 1.65V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 1.5A
- Current - Output:
- 1.5A
- 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:
- Through Hole
- Supplier Device Package:
- TO-220-3
MIC39150-1.65BT FAQ
1.How can I place an order for MIC39150-1.65BT through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC39150-1.65BT 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 MIC39150-1.65BT reliable?
The price and inventory of MIC39150-1.65BT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC39150-1.65BT is usually 5 days.
3.What payment methods are accepted for MIC39150-1.65BT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC39150-1.65BT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC39150-1.65BT?
MIC39150-1.65BT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC39150-1.65BT 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 MIC39150-1.65BT?
For technical support, including MIC39150-1.65BT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC39150-1.65BT requirements.
6.How does Aetrix verify that MIC39150-1.65BT is sourced from the original manufacturer or authorized distributors?
All MIC39150-1.65BT 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 MIC39150-1.65BT meets industry standards.
7.What is the process for return or replacement of MIC39150-1.65BT?
All MIC39150-1.65BT units undergo pre-shipment inspection (PSI). If there is an issue with MIC39150-1.65BT, 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 MIC39150-1.65BT part is unused and in its original packaging.
Return procedure for MIC39150-1.65BT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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