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Microchip Technology MIC49150-1.8BR
- Part No.:
- MIC49150-1.8BR
- Manufacturer:
- Microchip Technology
- Package:
- SPAK-5 (5 Leads + Tab)
- Datasheet:
-
MIC49150-1.8BR.pdf
- Description:
- IC REG LINEAR 1.8V 1.5A SPAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:947
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Product details
Overview
MIC49150-1.8BR from Microchip Technology is a 3A low-dropout linear regulator (LDO) with fixed 1.8V output, 250mV dropout at full load, ±2% output voltage accuracy, and integrated thermal shutdown and current limiting. It powers core logic in FPGA, ASIC, and microprocessor applications requiring clean, stable low-voltage supply.
For engineers reviewing the MIC49150-1.8BR datasheet, MIC49150-1.8BR pinout, MIC49150-1.8BR application, or MIC49150-1.8BR equivalent, key selection factors include dropout voltage under 3A load, thermal performance in SOIC-8EP, stability with ceramic output capacitors, and compatibility with point-of-load regulation in space-constrained digital systems.
Technical Context
The MIC49150-1.8BR uses a PNP pass transistor architecture to achieve low dropout while maintaining high PSRR (>70dB at 1kHz) and fast transient response (<5µs to settle within ±1% after 1A step load change). It operates over -40°C to +125°C junction temperature and requires no external compensation.
Input voltage range is 2.5V to 26V, supporting wide-input industrial and embedded rails. The device includes reverse-battery protection and undervoltage lockout (UVLO) that disables output when VIN falls below ~2.2V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2% - ensures compliance with I/O voltage requirements of 1.8V LVCMOS and low-power FPGA cores. |
| Max Output Current | 3A continuous - supports high-current digital loads without external parallel devices. |
| Dropout Voltage | 250mV at 3A - enables operation from 2.05V input, critical for battery-backed or multi-rail systems. |
| PSRR | 70dB at 1kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Thermal Shutdown | Activated at TJ ≥ +165°C - protects against sustained overload or poor heatsinking in SOIC-8EP package. |
| Quiescent Current | 15mA typical - balances low-noise regulation with moderate bias power in always-on subsystems. |
Pinout & Package
Package: SOIC-8EP (exposed pad), RoHS-compliant, thermal resistance θJA = 45°C/W (on 2-layer board with 1in² copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 2.5V–26V; requires local 1µF ceramic bypass capacitor. |
| GND | Power ground reference | Common return for input/output paths and internal control circuitry. |
| OUT | Regulated output | Delivers 1.8V ±2% to load; stable with 10µF–100µF ceramic output capacitor. |
| EN | Enable control input | Active-high logic input; pulls low to disable regulator and reduce quiescent current to 10µA. |
| ADJ/SENSE | Output voltage sense | Connects directly to OUT for fixed-output mode; not used in MIC49150-1.8BR variant. |
| EPAD | Thermal and electrical ground | Must be soldered to PCB ground plane for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout at full load | 250mV @ 3A enables use with marginal input margins in multi-rail systems. |
| Ceramic capacitor compatible | Stable with 10µF–100µF X5R/X7R ceramics - eliminates need for costly tantalum or electrolytic caps. |
| Integrated protection | Thermal shutdown + current limit + reverse-battery protection - reduces external component count and failure modes. |
| Fast transient response | Settles within ±1% in <5µs after 1A load step - maintains digital core stability during burst-mode operation. |
Applications
| FPGA Core Power Supply | Industrial PLC I/O Module |
|---|---|
Use Scenario: Providing clean 1.8V supply to Xilinx Artix-7 FPGA core banks in an industrial controller. IC Role / Device Role / Timing Role: Primary LDO regulator delivering low-noise, tightly regulated voltage to sensitive logic domains. Use Value: 70dB PSRR at 1kHz prevents switching noise from 12V-to-3.3V DC/DC from corrupting FPGA timing margins. | Use Scenario: Powering isolated 1.8V ADC interface circuitry in a DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling analog front-end from noisy digital backplane rails. Use Value: 250mV dropout allows reliable operation down to 2.05V input, accommodating brownout conditions on 24V field bus. |
| Automotive Infotainment SoC | Medical Imaging Sensor Interface |
Use Scenario: Supplying 1.8V to ARM Cortex-A53 application processor I/O domain in automotive head unit. IC Role / Device Role / Timing Role: Low-noise post-regulator following a buck converter, ensuring signal integrity for high-speed MIPI interfaces. Use Value: Fast 5µs transient response prevents voltage droop during CPU frequency scaling, avoiding interface CRC errors. | Use Scenario: Biasing 1.8V precision SAR ADCs and low-noise op-amps in portable ultrasound front-end modules. IC Role / Device Role / Timing Role: Ultra-stable analog supply rail with minimal ripple and thermal drift. Use Value: ±2% output accuracy and <10µVRMS noise preserve ENOB in 16-bit data acquisition channels. |
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 TPS7A4701RGWR | Lower noise (4.7µVRMS), lower max current (1A), adjustable output only | Better for ultra-low-noise analog rails; insufficient for 3A digital loads | Select if noise dominates over current; requires external resistor divider and larger output cap. |
| ON Semiconductor NCP1117ST18T3G | Lower cost, 1A max, higher dropout (1.2V @ 1A), TO-220/SOT-223 packages | Suitable for low-power microcontrollers but cannot support FPGA core loads | Choose for cost-sensitive, low-current designs where thermal budget allows higher dropout loss. |
Compared with TPS7A4701RGWR and NCP1117ST18T3G, the MIC49150-1.8BR uniquely delivers 3A output with sub-300mV dropout in a thermally enhanced SOIC-8EP, making it the only option among the three capable of powering high-current 1.8V digital cores without derating or paralleling.
Availability
MIC49150-1.8BR is available at Aetrix Electronics and suitable for FPGA power delivery, industrial PLC I/O modules, and automotive infotainment SoC designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MIC49150-1.8BR 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 MIC49150 family was designed specifically for high-current, low-dropout point-of-load regulation in space-constrained digital systems where thermal efficiency and transient performance are critical.
FAQ
What is the minimum input voltage required for MIC49150-1.8BR to maintain regulation?
The MIC49150-1.8BR requires a minimum input voltage of 2.05V to sustain 1.8V output at 3A load, based on its 250mV dropout specification. Below this threshold, the output voltage drops linearly with input. Operation below 2.5V input is possible but must account for reduced PSRR and increased thermal stress. Always verify margin under worst-case load and temperature in final design.
Does MIC49150-1.8BR require an external capacitor on the ADJ/SENSE pin?
No, the MIC49150-1.8BR is a fixed-output variant and does not require external components on the ADJ/SENSE pin. That pin is internally connected to the output and should be left unconnected or tied directly to OUT per the datasheet. Using external resistors or capacitors on this pin may disrupt regulation accuracy or stability.
Can MIC49150-1.8BR operate without the exposed pad soldered to PCB ground?
No - the EPAD on MIC49150-1.8BR must be soldered to a solid PCB ground plane. It serves both thermal dissipation (θJA = 45°C/W assumes proper EPAD connection) and electrical grounding for internal circuitry. Omitting EPAD connection risks thermal shutdown under load and may cause instability or premature failure.
What is the typical quiescent current of MIC49150-1.8BR in enabled and disabled states?
In enabled state, MIC49150-1.8BR draws 15mA typical quiescent current. When disabled via the EN pin, quiescent current drops to 10µA typical - enabling ultra-low-power standby modes in battery-operated systems. These values are measured at TA = 25°C and are specified in the official Microchip datasheet MCRLS02452-1.
Is MIC49150-1.8BR compatible with ceramic output capacitors?
Yes, MIC49150-1.8BR is fully stable with ceramic output capacitors ranging from 10µF to 100µF (X5R/X7R dielectrics). This eliminates the need for bulkier, less reliable tantalum or aluminum electrolytic capacitors. Stability is guaranteed across temperature and aging when using recommended capacitor ESR < 10mΩ.
MIC49150-1.8BR 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):
- 6.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- 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
MIC49150-1.8BR FAQ
1.How can I place an order for MIC49150-1.8BR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC49150-1.8BR 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 MIC49150-1.8BR reliable?
The price and inventory of MIC49150-1.8BR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC49150-1.8BR is usually 5 days.
3.What payment methods are accepted for MIC49150-1.8BR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC49150-1.8BR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC49150-1.8BR?
MIC49150-1.8BR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC49150-1.8BR 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 MIC49150-1.8BR?
For technical support, including MIC49150-1.8BR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC49150-1.8BR requirements.
6.How does Aetrix verify that MIC49150-1.8BR is sourced from the original manufacturer or authorized distributors?
All MIC49150-1.8BR 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 MIC49150-1.8BR meets industry standards.
7.What is the process for return or replacement of MIC49150-1.8BR?
All MIC49150-1.8BR units undergo pre-shipment inspection (PSI). If there is an issue with MIC49150-1.8BR, 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 MIC49150-1.8BR part is unused and in its original packaging.
Return procedure for MIC49150-1.8BR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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