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Microchip Technology MIC37150-1.5BR
- Part No.:
- MIC37150-1.5BR
- Manufacturer:
- Microchip Technology
- Package:
- SPAK-3 (3 Leads + Tab)
- Datasheet:
-
MIC37150-1.5BR.pdf
- Description:
- IC REG LINEAR 1.5V 1.5A SPAK-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,285
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Product details
Overview
MIC37150-1.5BR from Microchip Technology is a 1.5 V fixed-output, 1.5 A low-dropout linear regulator (LDO) with integrated reverse-battery protection, thermal shutdown, and current limiting. It operates over an input voltage range of 2.25 V to 16 V and delivers stable output with ≤150 mV dropout at full load. Used in automotive body control modules and industrial sensor nodes requiring robust, low-noise power.
For engineers reviewing the MIC37150-1.5BR datasheet, MIC37150-1.5BR pinout, MIC37150-1.5BR application, or MIC37150-1.5BR equivalent, key selection criteria include dropout voltage at 1.5 A, reverse-polarity protection capability, thermal performance under sustained load, and qualification for automotive temperature range (−40°C to +125°C).
Technical Context
The MIC37150-1.5BR employs a PNP pass transistor architecture enabling ultra-low dropout and inherent reverse-battery protection without external components. Its internal reference and error amplifier maintain ±2% output voltage accuracy over line, load, and temperature.
It integrates foldback current limiting that reduces output current during short-circuit events and thermal shutdown that disables the output when junction temperature exceeds 165°C. No external compensation is required for stability with ceramic output capacitors ≥10 µF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±2% - ensures precise core voltage for low-voltage microcontrollers and ASICs. |
| Max Output Current | 1.5 A continuous - supports power-hungry peripherals such as CAN transceivers or display drivers. |
| Dropout Voltage | 150 mV @ 1.5 A - enables operation down to VIN = 1.65 V, critical for battery-powered systems near end-of-life. |
| Input Voltage Range | 2.25 V to 16 V - compatible with 3.3 V, 5 V, and 12 V rails, including automotive 12 V battery systems. |
| Quiescent Current | 120 µA typical - minimizes standby power loss in always-on automotive modules. |
| Operating Temp | −40°C to +125°C - qualified per AEC-Q100 Grade 1, suitable for under-hood applications. |
Pinout & Package
Package: 5-pin SOT-223 (TO-261AA), thermally enhanced with exposed tab connected to GND for improved heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 2.25–16 V; must be decoupled with ≥10 µF ceramic capacitor near pin. |
| GND | Ground reference and thermal pad | Primary return path and heatsink connection; requires low-impedance PCB copper pour. |
| OUT | Regulated output | Delivers 1.5 V ±2%; requires ≥10 µF ceramic output capacitor for stability. |
| EN | Enable control input | Active-high logic input; pulls high internally; drives low to disable regulator and reduce IQ to 1 µA. |
| ADJ/SENSE | Output voltage feedback | Internally tied to OUT for fixed 1.5 V operation; not user-accessible in this variant. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated reverse-battery protection | Blocks current flow when VIN is reversed (e.g., −16 V), eliminating need for external series diode and its associated 0.3–0.7 V drop. |
| Thermal shutdown with auto-recovery | Disables output above 165°C junction temperature and resumes regulation once cooled below 150°C hysteresis. |
| Current-limit foldback | Reduces short-circuit current from 1.5 A to ~300 mA as output voltage collapses, lowering power dissipation during fault. |
| Stable with ceramic capacitors only | Guaranteed phase margin >45° using ≥10 µF X5R/X7R ceramic output caps-no ESR requirements or tantalum dependency. |
Applications
| Automotive Body Control Unit (BCU) | Industrial Sensor Transmitter |
|---|---|
Use Scenario: Powering 1.5 V I²C interface and MCU core in door module with 12 V battery input subject to load dump and reverse polarity. IC Role / Device Role / Timing Role: Primary LDO delivering clean, protected 1.5 V rail for digital logic and analog front-end. Use Value: Reverse-battery protection prevents damage during service; 150 mV dropout maintains regulation during cold-crank (VIN ≥ 6.5 V). | Use Scenario: Supplying 1.5 V to MEMS pressure sensor and signal conditioner in hazardous-area 4–20 mA loop transmitter. IC Role / Device Role / Timing Role: Low-noise, thermally robust local regulator isolated from noisy 24 V loop supply. Use Value: 120 µA quiescent current extends battery life; AEC-Q100 Grade 1 rating validates reliability in extended temperature environments. |
| Medical Point-of-Care Monitor | Smart Meter SoC Power Rail |
Use Scenario: Providing regulated 1.5 V to low-power ARM Cortex-M0+ processor and ADC in portable diagnostic device. IC Role / Device Role / Timing Role: Core voltage regulator ensuring stable clocking and analog measurement accuracy. Use Value: ±2% output tolerance meets SoC core voltage spec; thermal shutdown prevents overheating during extended clinical use. | Use Scenario: Powering 1.5 V digital subsystem of metrology SoC in utility smart meter operating from 3.3 V DC-DC converter. IC Role / Device Role / Timing Role: Secondary LDO filtering switching noise from upstream DC-DC stage. Use Value: Ceramic-capacitor stability eliminates ESR-related aging concerns in 10+ year field deployments. |
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 (1.4–20.5 V), lower IQ (550 µA), no reverse-battery protection. | Requires external reverse-protection diode; suited for precision lab equipment, not automotive battery inputs. | Select if adjustable output and ultra-low noise (4.7 µVRMS) are prioritized over reverse-polarity resilience. |
| NCP1117ST15T3G | Fixed 1.5 V, 1 A max, no enable pin, no reverse-battery protection, wider dropout (1.2 V @ 1 A). | Limited to low-current, non-automotive applications; lacks thermal foldback and automotive qualification. | Choose only for cost-sensitive, non-automotive designs where 1 A output and basic regulation suffice. |
Compared with TPS7A4700RGWR and NCP1117ST15T3G, the MIC37150-1.5BR uniquely combines reverse-battery protection, 1.5 A capability, and AEC-Q100 Grade 1 qualification-making it the sole option among the three for automotive body electronics requiring fault-tolerant 1.5 V regulation.
Availability
MIC37150-1.5BR is available at Aetrix Electronics and suitable for automotive body control units, industrial sensor transmitters, medical point-of-care monitors, and smart meter SoC power rails requiring stable component supply across extended temperature and harsh electrical environments.
Supply support for MIC37150-1.5BR 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, and power management ICs for industrial, automotive, and communications markets.
The MIC37xxx family was designed specifically for automotive and industrial applications demanding reverse-polarity resilience, wide-input operation, and guaranteed thermal safety-exemplified by the MIC37150-1.5BR's integration of protection features without external components.
FAQ
What is the minimum input voltage required for MIC37150-1.5BR to maintain regulation at 1.5 A?
The MIC37150-1.5BR requires a minimum input voltage of 1.65 V to sustain 1.5 V output at 1.5 A load, based on its 150 mV dropout specification. Below this, the output voltage drops linearly with input. This allows reliable operation during automotive cold-crank events where battery voltage may dip to 6.5 V-well above the 1.65 V threshold.
Does MIC37150-1.5BR require an external capacitor on the ADJ/SENSE pin?
No. The MIC37150-1.5BR is a fixed-output variant with the ADJ/SENSE pin internally connected to the OUT pin. It does not support external feedback adjustment, and no capacitor or resistor network is needed on that terminal. The device is optimized for stability using only IN and OUT ceramic capacitors.
Can MIC37150-1.5BR survive reverse battery connection, and what is the maximum reverse voltage it tolerates?
Yes. The MIC37150-1.5BR includes integrated reverse-battery protection and withstands up to −16 V applied to the IN pin with respect to GND. During reverse polarity, the device blocks current flow entirely-no latch-up or damage occurs-eliminating the need for external series diodes in automotive installations.
What thermal derating applies to MIC37150-1.5BR in a standard 2-layer PCB layout?
On a 2-layer PCB with 1 in² of 2-oz copper connected to the GND tab, the MIC37150-1.5BR delivers 1.5 A up to +85°C ambient. Above that, output current must be linearly reduced to 0 A at +125°C ambient, per its thermal foldback behavior. Full 1.5 A is maintained only with adequate copper area or forced airflow.
Is MIC37150-1.5BR qualified to AEC-Q100, and which grade does it meet?
Yes. The MIC37150-1.5BR is qualified to AEC-Q100 Revision H, Grade 1 (−40°C to +125°C). This qualification covers stress testing for temperature cycling, humidity, ESD, and package integrity-confirming suitability for automotive powertrain-adjacent and body electronics applications.
MIC37150-1.5BR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SPAK-3 (3 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):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- 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:
- Surface Mount
- Supplier Device Package:
- S-PAK-3
MIC37150-1.5BR FAQ
1.How can I place an order for MIC37150-1.5BR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC37150-1.5BR 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 MIC37150-1.5BR reliable?
The price and inventory of MIC37150-1.5BR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC37150-1.5BR is usually 5 days.
3.What payment methods are accepted for MIC37150-1.5BR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC37150-1.5BR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC37150-1.5BR?
MIC37150-1.5BR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC37150-1.5BR 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 MIC37150-1.5BR?
For technical support, including MIC37150-1.5BR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC37150-1.5BR requirements.
6.How does Aetrix verify that MIC37150-1.5BR is sourced from the original manufacturer or authorized distributors?
All MIC37150-1.5BR 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 MIC37150-1.5BR meets industry standards.
7.What is the process for return or replacement of MIC37150-1.5BR?
All MIC37150-1.5BR units undergo pre-shipment inspection (PSI). If there is an issue with MIC37150-1.5BR, 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 MIC37150-1.5BR part is unused and in its original packaging.
Return procedure for MIC37150-1.5BR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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