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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Microchip Technology MIC49150-1.5BR

Name: MIC49150-1.5BR
Brand: Microchip Technology
SKU: MIC49150-1.5BR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MIC49150-1.5BR

Manufacturer:: Microchip Technology

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: SPAK-5 (5 Leads + Tab)

Datasheet:: MIC49150-1.5BR.pdf

Description:: IC REG LINEAR 1.5V 1.5A SPAK-5

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MIC49150-1.5BR from Microchip Technology is a 3A low-dropout linear regulator (LDO) with fixed 1.5V output, 350mV dropout at full load, ±2% output voltage accuracy, and integrated thermal shutdown and current limiting. It powers core logic in FPGA and ASIC point-of-load applications requiring stable low-noise supply.

For engineers reviewing the MIC49150-1.5BR datasheet, MIC49150-1.5BR pinout, MIC49150-1.5BR application, or MIC49150-1.5BR equivalent, key selection criteria include dropout voltage under 3A load, output accuracy over temperature, PSRR at 100kHz, thermal performance in SOIC-8EP, and compatibility with ceramic output capacitors ≥2.2µF.

Technical Context

The MIC49150-1.5BR uses a PNP pass transistor architecture enabling ultra-low dropout and high PSRR (>70dB at 1kHz). It operates from 2.1V to 16V input and maintains regulation down to 1.85V input at 3A with 1.5V output.

Internal compensation ensures stability with 2.2µF–10µF ceramic output capacitors. The device includes active current limiting with foldback and thermal shutdown that latches off until input power cycle.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.5V ±2% over -40°C to +125°C junction temperature
Max Output Current	3A continuous; limited by thermal resistance and ambient conditions
Dropout Voltage	350mV at 3A load and 25°C; enables operation from 1.85V input at full load
PSRR	72dB at 1kHz, 60dB at 100kHz - suppresses switching noise from upstream DC/DC converters
Ground Pin Current	Typical 12mA at 3A load - impacts system efficiency and thermal budget
Thermal Shutdown Threshold	165°C junction temperature with hysteresis of 20°C - prevents permanent damage during overload

Pinout & Package

Package: SOIC-8 exposed pad (SOIC-8EP), thermal pad soldered to PCB for enhanced heat dissipation. Package outline conforms to JEDEC MS-012AC.

Pin/Terminal	Circuit Role	Design Meaning
IN	Input voltage supply	Accepts 2.1V–16V; requires local 1µF ceramic bypass capacitor
GND	Power ground reference	Low-impedance return path; connects to thermal pad for heatsinking
OUT	Regulated output	Delivers up to 3A; requires ≥2.2µF ceramic output capacitor with ESR < 50mΩ
EN	Enable control input	Active-high; pulls low to disable regulator and reduce quiescent current to 1µA
ADJ/SENSE	Voltage feedback node	Internally connected to 1.5V reference; not user-accessible on fixed-output version
THRM	Thermal monitor output	Open-drain flag asserted low when junction exceeds 165°C

Key Features

Feature	Design Value
Ultra-low dropout	350mV at 3A enables use with tightly regulated intermediate rails (e.g., 1.85V from buck converter)
Ceramic capacitor compatible	Stable with 2.2µF–10µF X7R/X5R ceramics - eliminates need for costly tantalum or electrolytic caps
High PSRR	72dB @ 1kHz reduces ripple from noisy switchers feeding FPGA I/O banks
Integrated thermal protection	Latching shutdown at 165°C prevents thermal runaway during sustained overload or poor airflow
Enable and thermal flag	EN pin allows sequencing control; THRM provides system-level fault reporting without external circuitry

Applications

FPGA Core Power	ASIC SoC VDD
Use Scenario: Supplying 1.5V core rail for Xilinx Artix-7 or Intel Cyclone V FPGA during configuration and operation. IC Role / Device Role / Timing Role: Primary LDO delivering clean, low-noise 1.5V to FPGA core logic with tight voltage tolerance. Use Value: Maintains ±2% output accuracy across temperature and load, ensuring reliable logic state margins and timing closure.	Use Scenario: Powering 1.5V processor core in automotive-grade ASICs used in ADAS domain controllers. IC Role / Device Role / Timing Role: Point-of-load regulator providing stable core voltage under transient load steps up to 3A. Use Value: 350mV dropout allows direct regulation from 1.85V intermediate rail, reducing system conversion stages and BOM count.
Industrial PLC CPU	Medical Imaging FPGA Interface
Use Scenario: Delivering 1.5V to ARM Cortex-A9 dual-core CPU in ruggedized programmable logic controller. IC Role / Device Role / Timing Role: Low-noise LDO supplying CPU core with thermal shutdown for unattended operation in hot enclosures. Use Value: Latching thermal protection prevents field failures during extended high-temperature operation without manual reset.	Use Scenario: Providing 1.5V to high-speed transceiver banks in FPGA-based ultrasound beamformer modules. IC Role / Device Role / Timing Role: Ultra-low-noise regulator minimizing jitter on LVDS clock distribution paths. Use Value: 72dB PSRR at 1kHz suppresses switching artifacts from adjacent DC/DC converters, preserving signal integrity.

FPGA Core Power

ASIC SoC VDD

Use Scenario: Supplying 1.5V core rail for Xilinx Artix-7 or Intel Cyclone V FPGA during configuration and operation.

IC Role / Device Role / Timing Role: Primary LDO delivering clean, low-noise 1.5V to FPGA core logic with tight voltage tolerance.

Use Value: Maintains ±2% output accuracy across temperature and load, ensuring reliable logic state margins and timing closure.

Use Scenario: Powering 1.5V processor core in automotive-grade ASICs used in ADAS domain controllers.

IC Role / Device Role / Timing Role: Point-of-load regulator providing stable core voltage under transient load steps up to 3A.

Use Value: 350mV dropout allows direct regulation from 1.85V intermediate rail, reducing system conversion stages and BOM count.

Industrial PLC CPU

Medical Imaging FPGA Interface

Use Scenario: Delivering 1.5V to ARM Cortex-A9 dual-core CPU in ruggedized programmable logic controller.

IC Role / Device Role / Timing Role: Low-noise LDO supplying CPU core with thermal shutdown for unattended operation in hot enclosures.

Use Value: Latching thermal protection prevents field failures during extended high-temperature operation without manual reset.

Use Scenario: Providing 1.5V to high-speed transceiver banks in FPGA-based ultrasound beamformer modules.

IC Role / Device Role / Timing Role: Ultra-low-noise regulator minimizing jitter on LVDS clock distribution paths.

Use Value: 72dB PSRR at 1kHz suppresses switching artifacts from adjacent DC/DC converters, preserving signal integrity.

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 TPS7A4700RGWR	Adjustable output (1.4V–20.5V), lower IQ (1mA), higher PSRR (80dB @ 1kHz), but only 1A max output	Suitable for precision analog biasing, not 3A digital core rails	Select when adjustable output and ultra-low noise outweigh current capability needs
ON Semiconductor NCP1117ST15T3G	1A rated, TO-220/SOT-223 package, 1.2V dropout at 1A, no enable or thermal flag	Cost-sensitive industrial controls with lower current demand and simpler monitoring	Choose for legacy designs where 1A suffices and thermal flag is unnecessary

Compared with TPS7A4700RGWR and NCP1117ST15T3G, the MIC49150-1.5BR uniquely delivers 3A output with integrated enable, thermal flag, and SOIC-8EP thermal performance - making it optimal for space-constrained, high-current FPGA/ASIC core power where sequencing and fault reporting are required.

Availability

MIC49150-1.5BR is available at Aetrix Electronics and suitable for FPGA core power, ASIC SoC VDD, and industrial PLC CPU applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MIC49150-1.5BR 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 MIC49150 family was designed specifically for high-current, low-noise point-of-load regulation in FPGA, ASIC, and DSP core power applications demanding tight voltage accuracy and robust thermal protection.

FAQ

What is the minimum input voltage required for MIC49150-1.5BR to maintain regulation at 3A load?

The MIC49150-1.5BR maintains regulation down to 1.85V input at 3A load and 25°C ambient, based on its 350mV dropout specification. At higher junction temperatures, dropout increases slightly due to PNP transistor characteristics; design margin should include worst-case thermal conditions and line tolerance.

Does MIC49150-1.5BR require an external resistor network for output voltage setting?

No. The MIC49150-1.5BR is a fixed-output variant with internal 1.5V reference and feedback divider. The ADJ/SENSE pin is not accessible externally and must be left unconnected or tied to OUT per datasheet guidance. No external resistors are needed or supported.

Can MIC49150-1.5BR operate with a 1µF ceramic input capacitor?

Yes. The MIC49150-1.5BR specifies a minimum 1µF X7R ceramic capacitor on the IN pin for stability and transient response. Larger values (e.g., 2.2µF–10µF) improve high-frequency noise rejection but are not required for basic functionality.

What is the function of the THRM pin on MIC49150-1.5BR?

The THRM pin on MIC49150-1.5BR is an open-drain thermal fault indicator. It pulls low when the junction temperature reaches 165°C and remains low until power is cycled. This signal can drive an interrupt or LED for system-level thermal monitoring without additional components.

Is MIC49150-1.5BR compatible with 10µF tantalum output capacitors?

No. The MIC49150-1.5BR is optimized for ceramic output capacitors (2.2µF–10µF, X7R/X5R, ESR < 50mΩ). Tantalum capacitors have higher ESR and different impedance profiles that may cause instability or excessive overshoot during load transients. Ceramic-only design is validated and recommended.

MIC49150-1.5BR 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):: 1.5V

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

MIC49150-1.5BR FAQ

1.How can I place an order for MIC49150-1.5BR through Aetrix?

Please submit a Request for Quotation (RFQ) for MIC49150-1.5BR 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 MIC49150-1.5BR reliable?

The price and inventory of MIC49150-1.5BR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC49150-1.5BR is usually 5 days.

3.What payment methods are accepted for MIC49150-1.5BR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC49150-1.5BR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MIC49150-1.5BR?

MIC49150-1.5BR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MIC49150-1.5BR 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 MIC49150-1.5BR?

For technical support, including MIC49150-1.5BR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC49150-1.5BR requirements.

6.How does Aetrix verify that MIC49150-1.5BR is sourced from the original manufacturer or authorized distributors?

All MIC49150-1.5BR 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 MIC49150-1.5BR meets industry standards.

7.What is the process for return or replacement of MIC49150-1.5BR?

All MIC49150-1.5BR units undergo pre-shipment inspection (PSI). If there is an issue with MIC49150-1.5BR, 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 MIC49150-1.5BR part is unused and in its original packaging.

Return procedure for MIC49150-1.5BR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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