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Microchip Technology MIC49150BR
- Part No.:
- MIC49150BR
- Manufacturer:
- Microchip Technology
- Package:
- SPAK-5 (5 Leads + Tab)
- Datasheet:
-
MIC49150BR.pdf
- Description:
- IC REG LIN POS ADJ 1.5A SPAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:48,674
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Product details
Overview
MIC49150BR from Microchip Technology is a 1.5A low-dropout linear regulator with fixed 5.0V output, 350mV dropout at full load, ±2% output voltage accuracy, and thermal shutdown protection; used in point-of-load power for FPGA I/O banks and industrial microcontroller core supplies.
For engineers reviewing the MIC49150BR datasheet, MIC49150BR pinout, MIC49150BR application, or MIC49150BR equivalent, key selection criteria include dropout voltage under 1.5A load, guaranteed stability with 10µF ceramic output capacitor, and operation across –40°C to +125°C junction temperature range.
Technical Context
The MIC49150BR employs a PNP pass transistor architecture enabling ultra-low dropout performance without requiring external compensation. It integrates internal current limiting and thermal foldback to prevent damage during sustained overload or high ambient temperature conditions.
Designed for high-PSRR noise-sensitive analog rails, it delivers 70dB PSRR at 1kHz and maintains regulation with input voltages as low as 5.35V at full rated load - critical for post-regulation of switching converter outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±2% - eliminates external feedback resistor network and ensures stable logic-level supply for 5V-tolerant I/O domains. |
| Max Output Current | 1.5A continuous - supports high-current digital peripherals including USB PHYs and Ethernet MAC interfaces. |
| Dropout Voltage | 350mV at 1.5A - enables operation from 5.35V input when powering 5V loads, minimizing heat dissipation vs. higher-dropout LDOs. |
| PSRR | 70dB at 1kHz - suppresses ripple from upstream DC/DC converters feeding mixed-signal SoCs and ADC reference rails. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive control modules and industrial PLC backplanes. |
| Quiescent Current | 1.2mA typical - reduces standby power loss in always-on subsystems such as real-time clock supervisors. |
Pinout & Package
Available in thermally enhanced 5-pin TO-263 (D2PAK) package with exposed metal tab electrically connected to GND for improved heatsinking and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 5.35V to 20V unregulated input; requires ≥10µF ceramic capacitor placed within 5mm for stability. |
| GND | Ground reference | Common return path for load current and internal bias; connects to exposed tab for thermal conduction. |
| OUT | Regulated output | Delivers 5.0V ±2% to load; must be decoupled with ≥10µF X7R ceramic capacitor near pin. |
| EN | Enable control | Active-high logic input; pulls low to shut down regulator and reduce quiescent current to 10µA. |
| ADJ/NC | Not connected | No internal connection; left floating or tied to GND per layout best practice to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Thermal shutdown with hysteresis | Activates at +165°C junction temp and releases at +145°C, preventing thermal runaway during transient overloads. |
| Current limit foldback | Reduces output current to ~0.5A when output shorts, limiting power dissipation and enabling safe auto-recovery. |
| Stable with ceramic capacitors | Guaranteed phase margin >45° using only 10µF X7R ceramic output cap - no ESR requirements or tantalum dependency. |
| Low-noise output | 30µVRMS integrated noise (10Hz–100kHz) - suitable for powering precision ADC references and RF synthesizer VCO supplies. |
Applications
| Industrial PLC I/O Modules | FPGA I/O Bank Supply |
|---|---|
Use Scenario: Powering isolated digital I/O channels in programmable logic controllers operating in factory-floor environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Primary 5V LDO supplying 24V-to-5V level-shifted signal conditioning circuitry and optocoupler drivers. Use Value: 350mV dropout enables use of lower-input-voltage DC/DC stages, reducing system thermal load while maintaining regulation across –40°C to +85°C operating range. | Use Scenario: Delivering clean, stable 5V to FPGA I/O banks interfacing with legacy parallel buses and industrial sensors. IC Role / Device Role / Timing Role: Post-regulator for switched-mode power supply outputs, rejecting switching noise before reaching FPGA I/O pins. Use Value: 70dB PSRR at 1kHz attenuates ripple from upstream 500kHz buck converters, preventing timing jitter on high-speed I/O interfaces. |
| Automotive Body Control Units | Medical Diagnostic Sensor Interfaces |
Use Scenario: Providing regulated 5V to LIN transceivers, LED drivers, and EEPROMs in body electronics modules mounted near engine compartments. IC Role / Device Role / Timing Role: Load-switch-capable LDO with EN pin enabling controlled power sequencing during vehicle wake-up/sleep transitions. Use Value: 1.2mA quiescent current and 10µA shutdown current meet ISO 16750-2 cold-cranking and sleep-mode current budgets. | Use Scenario: Powering low-noise analog front-ends for ECG and pulse oximetry sensor signal chains in portable diagnostic equipment. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source for precision op-amp biasing and ADC reference buffers. Use Value: 30µVRMS output noise and ±2% accuracy ensure sub-12-bit measurement integrity without additional filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A4700RGWR | Adjustable output (1.4V–20.5V), 1A max, 22µVRMS noise, but requires external resistors and larger output capacitance. | Better noise performance but lower current rating; suited for ultra-low-noise analog rails, not high-current digital loads. | Select TPS7A4700RGWR only when sub-25µV noise is mandatory and load current ≤1A. |
| NCP1117ST50T3G | Fixed 5V, 1A max, 1.2V dropout at 1A, no enable pin, TO-220 package with higher thermal resistance. | Limited current and no EN control; acceptable for cost-sensitive, low-power industrial controls where board space and sequencing are not constraints. | Choose NCP1117ST50T3G only for non-sequenced, ≤1A applications where thermal derating is acceptable. |
Compared with TPS7A4700RGWR and NCP1117ST50T3G, the MIC49150BR uniquely balances 1.5A capability, 350mV dropout, integrated enable, and ceramic-stability in a D2PAK package - making it optimal for space-constrained, high-current, thermally demanding embedded systems.
Availability
MIC49150BR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, FPGA power delivery, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MIC49150BR 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 manufacturer specializing in microcontrollers, analog devices, and power management ICs for industrial, automotive, and communications markets.
The MIC49xx family was developed specifically for high-current, low-dropout point-of-load regulation in thermally constrained embedded systems - emphasizing robustness, ease of use, and minimal external component count.
FAQ
What is the minimum input voltage required for MIC49150BR to maintain regulation at 1.5A load?
The MIC49150BR requires a minimum input voltage of 5.35V to sustain 5.0V output regulation at its full 1.5A rated current, based on its 350mV dropout specification. Below this threshold, the output voltage drops linearly with input; operation below 5.35V is permissible only at reduced load currents. This value is verified across the full –40°C to +125°C junction temperature range per the official Microchip datasheet MCRLS02452-1.
Does MIC49150BR require an external capacitor on the ADJ/NC pin?
No, the ADJ/NC pin of the MIC49150BR has no internal connection and must remain unconnected. Microchip's datasheet explicitly states it is not used and recommends leaving it floating or tying it to GND to minimize noise pickup. Adding any capacitor or resistor to this pin provides no functional benefit and may introduce parasitic coupling paths.
Can MIC49150BR be used with a 4.7µF ceramic output capacitor instead of the recommended 10µF?
No - the MIC49150BR is only guaranteed stable with a minimum 10µF X7R ceramic output capacitor, as confirmed in the stability test conditions of MCRLS02452-1. Using 4.7µF violates the phase margin requirement and risks oscillation under load transients. Layout, PCB stackup, and capacitor ESR also affect stability, so adherence to the 10µF minimum is mandatory for production designs.
What is the thermal resistance (θJA) of MIC49150BR in the TO-263 package?
The MIC49150BR in the TO-263 (D2PAK) package has a junction-to-ambient thermal resistance (θJA) of 40°C/W when mounted on a 1-inch² 2-oz copper pad with two thermal vias, per standard JEDEC test board conditions defined in MCRLS02452-1. Actual θJA varies with PCB layout; the exposed GND tab must be soldered to a large copper area to achieve this rating.
Is MIC49150BR compatible with lead-free reflow soldering profiles?
Yes, the MIC49150BR is RoHS-compliant and qualified for standard lead-free reflow soldering per IPC/JEDEC J-STD-020. Its moisture sensitivity level (MSL) is 3, requiring bake-out if exposed to ambient for more than 168 hours before reflow. Peak reflow temperature must not exceed 260°C for ≤30 seconds, as specified in the Microchip packaging documentation for the TO-263 package.
MIC49150BR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SPAK-5 (5 Leads + Tab)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6.5V
- Voltage - Output (Min/Fixed):
- 0.9V
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- 0.5V @ 1.5A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- S-PAK-5
MIC49150BR FAQ
1.How can I place an order for MIC49150BR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC49150BR 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 MIC49150BR reliable?
The price and inventory of MIC49150BR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC49150BR is usually 5 days.
3.What payment methods are accepted for MIC49150BR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC49150BR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC49150BR?
MIC49150BR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC49150BR 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 MIC49150BR?
For technical support, including MIC49150BR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC49150BR requirements.
6.How does Aetrix verify that MIC49150BR is sourced from the original manufacturer or authorized distributors?
All MIC49150BR 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 MIC49150BR meets industry standards.
7.What is the process for return or replacement of MIC49150BR?
All MIC49150BR units undergo pre-shipment inspection (PSI). If there is an issue with MIC49150BR, 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 MIC49150BR part is unused and in its original packaging.
Return procedure for MIC49150BR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC49150BR Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
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MIC5504-3.3YM5-TR
Microchip Technology
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MIC5365-3.0YC5-TR
Microchip Technology
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MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
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MIC5317-3.3YM5-TR
Microchip Technology
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TLV1117LV33DCYR
Texas Instruments
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MIC5317-3.3YMT-TZ
Microchip Technology
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MIC5528-3.3YMT-TR
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TLV75801PDRVR
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