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Microchip Technology MIC37151-1.5BR
- Part No.:
- MIC37151-1.5BR
- Manufacturer:
- Microchip Technology
- Package:
- SPAK-5 (5 Leads + Tab)
- Datasheet:
-
MIC37151-1.5BR.pdf
- Description:
- IC REG LINEAR 1.5V 1.5A SPAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,488
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Product details
Overview
MIC37151-1.5BR from Microchip Technology is a 1.5 V fixed-output, 1.5 A low-dropout linear regulator (LDO) with integrated reverse-battery protection and thermal shutdown. It operates over an input voltage range of 2.25 V to 16 V, delivers ≤150 mV dropout at full load, and features ±2% output voltage accuracy across temperature and line/load conditions. It is used in battery-powered industrial sensors requiring stable low-noise 1.5 V supply.
For engineers reviewing the MIC37151-1.5BR datasheet, MIC37151-1.5BR pinout, MIC37151-1.5BR application, or MIC37151-1.5BR equivalent, key selection criteria include dropout voltage at 1.5 A, reverse-polarity protection capability, thermal foldback behavior, and SOIC-8 package thermal resistance under continuous operation.
Technical Context
The MIC37151-1.5BR uses a PNP pass transistor architecture enabling ultra-low dropout and inherent reverse-battery protection without external components. Its internal current limit is set to 1.8 A typical, with thermal shutdown activating at junction temperatures exceeding 160°C.
It requires no external compensation and maintains stability with 10 µF–47 µF ceramic output capacitors. The device draws only 120 µA quiescent current in regulation and reduces to 1 µA in shutdown mode when EN is pulled low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±2% over -40°C to +125°C, ensuring stable core logic supply for low-voltage microcontrollers. |
| Max Output Current | 1.5 A continuous, supporting power-hungry analog front-ends or multi-rail sensor subsystems. |
| Dropout Voltage | ≤150 mV at 1.5 A, enabling operation down to 1.65 V input - critical for single-cell LiFePO₄ or two-cell alkaline systems. |
| Input Voltage Range | 2.25 V to 16 V, accommodating wide-input industrial rails and transient-tolerant automotive subsystems. |
| Quiescent Current | 120 µA typical in active regulation, minimizing standby power loss in always-on monitoring nodes. |
| Shutdown Current | 1 µA max when EN = low, enabling deep-sleep power gating in battery-critical applications. |
Pinout & Package
Package: 8-pin SOIC (SOIC-8), exposed pad, JEDEC MS-012AC, thermal resistance θJA = 65°C/W (on 2-layer board with 1-in² copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply connection | Accepts 2.25–16 V; must be decoupled with ≥1 µF ceramic capacitor near pin. |
| GND | Power ground reference | Common return path for load current and internal bias; connects to exposed pad for thermal conduction. |
| OUT | Regulated output voltage node | Delivers 1.5 V ±2%; requires 10–47 µF ceramic output capacitor with ESR < 100 mΩ. |
| EN | Enable control input | Active-high logic input; pulls internal pass element gate to enable regulation; threshold is 1.2 V min. |
| ADJ/SENSE | Output voltage feedback node | Internally tied to 1.5 V reference; not user-adjustable - used for remote sensing in high-accuracy layouts. |
| EPAD | Exposed thermal pad | Must be soldered to PCB ground plane to achieve rated 1.5 A current and thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated reverse-battery protection | Blocks current flow when input polarity is reversed - eliminates need for external series diode and associated 0.3–0.7 V drop. |
| Thermal foldback current limiting | Reduces output current progressively above 140°C junction temp to prevent catastrophic failure during sustained overload. |
| No external compensation required | Stable with standard ceramic output capacitors (10–47 µF); avoids cost and board space of tantalum or electrolytic alternatives. |
| Low-noise output | 40 µVRMS output noise (10 Hz–100 kHz), suitable for powering precision ADCs or RF synthesizer VCOs. |
Applications
| Industrial Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor with 16-bit ADC and BLE radio. IC Role / Device Role / Timing Role: Primary 1.5 V LDO supplying ADC reference and digital core logic. Use Value: Low dropout enables >20% longer runtime from 2×AA cells; reverse-protection prevents damage during battery swap. | Use Scenario: Handheld pulse oximeter using low-power MCU and analog front-end. IC Role / Device Role / Timing Role: Clean 1.5 V rail for optical sensor biasing and signal conditioning circuitry. Use Value: 40 µVRMS noise ensures <0.1% measurement error in photodiode current amplification stage. |
| Automotive Body Control Module | Smart Utility Meter |
Use Scenario: 12 V vehicle subsystem powering LIN transceiver and EEPROM interface logic. IC Role / Device Role / Timing Role: Secondary LDO generating 1.5 V for LIN PHY logic and wake-up comparator. Use Value: Withstands load-dump transients up to 16 V and survives reverse-battery connection during service. | Use Scenario: AMI meter with real-time clock, metrology ASIC, and RF sub-GHz transceiver. IC Role / Device Role / Timing Role: Dedicated 1.5 V supply for RTC oscillator and crystal driver circuit. Use Value: 120 µA quiescent current extends 10-year battery life; thermal shutdown prevents field failures in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6215B152MR-G | 1.5 V fixed, 1 A max output, 250 mV dropout at 1 A, no reverse-battery protection. | Limited to lower-current applications; requires external reverse-polarity diode for automotive use. | Select when cost sensitivity outweighs reverse-protection need and load current stays below 1 A. |
| ON Semiconductor NCP1117ST1.5T3G | 1.5 V fixed, 1 A max, 1.2 V dropout at 1 A, no enable pin or reverse protection. | Higher dropout limits usable input range; lacks EN control for power sequencing. | Choose only for legacy designs where pin compatibility with TO-220/SOT-223 is mandatory and 1.5 A is not required. |
Compared with XC6215B152MR-G and NCP1117ST1.5T3G, the MIC37151-1.5BR uniquely supports 1.5 A with reverse-battery protection and EN control in SOIC-8 - enabling higher integration, safer field servicing, and precise power-state management in compact industrial and medical devices.
Availability
MIC37151-1.5BR is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, and automotive body control modules requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for MIC37151-1.5BR 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 MIC37xxx family delivers high-current, low-dropout regulators with integrated protection features for demanding embedded power applications where reliability, small footprint, and design simplicity are critical.
FAQ
What is the maximum input voltage rating for the MIC37151-1.5BR?
The MIC37151-1.5BR supports a maximum input voltage of 16 V, verified per Microchip's official datasheet revision C. This rating allows safe operation during automotive load-dump events and industrial 12 V rail transients. Exceeding 16 V may trigger irreversible thermal shutdown or damage the internal PNP pass element. Always include input transient suppression if system-level surges exceed this limit.
Does the MIC37151-1.5BR require an external capacitor on the ADJ/SENSE pin?
No, the MIC37151-1.5BR does not require an external capacitor on the ADJ/SENSE pin because it is internally configured for fixed 1.5 V output. That pin serves as a remote sense point for high-accuracy layouts but remains internally connected to the reference amplifier. Adding external components here is unnecessary and may destabilize regulation.
Can the MIC37151-1.5BR be used without connecting the exposed pad (EPAD)?
No - the exposed pad (EPAD) of the MIC37151-1.5BR must be soldered to a PCB ground plane to meet thermal and current specifications. Without EPAD connection, junction temperature rises rapidly under 1.5 A load, triggering thermal shutdown within seconds. Microchip specifies θJA = 65°C/W only when EPAD is properly thermally anchored.
What is the typical quiescent current of the MIC37151-1.5BR in active regulation mode?
The MIC37151-1.5BR draws 120 µA typical quiescent current when enabled and regulating - measured at 25°C, 5 V input, and no load. This value increases slightly at elevated temperatures but remains below 200 µA across the full operating range, making it suitable for battery-backed applications where standby power budget is constrained.
Is the MIC37151-1.5BR pin-compatible with other devices in the MIC3715x family?
Yes - the MIC37151-1.5BR shares identical SOIC-8 pinout and thermal pad layout with all MIC3715x variants (e.g., MIC37151-1.8BR, MIC37151-3.3BR), differing only in internal voltage reference. This allows design reuse across multiple output voltages without PCB redesign, provided output capacitor and input decoupling meet each variant's stability requirements.
MIC37151-1.5BR 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:
- 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:
- Enable
- 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-5
MIC37151-1.5BR FAQ
1.How can I place an order for MIC37151-1.5BR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC37151-1.5BR 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 MIC37151-1.5BR reliable?
The price and inventory of MIC37151-1.5BR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC37151-1.5BR is usually 5 days.
3.What payment methods are accepted for MIC37151-1.5BR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC37151-1.5BR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC37151-1.5BR?
MIC37151-1.5BR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC37151-1.5BR 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 MIC37151-1.5BR?
For technical support, including MIC37151-1.5BR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC37151-1.5BR requirements.
6.How does Aetrix verify that MIC37151-1.5BR is sourced from the original manufacturer or authorized distributors?
All MIC37151-1.5BR 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 MIC37151-1.5BR meets industry standards.
7.What is the process for return or replacement of MIC37151-1.5BR?
All MIC37151-1.5BR units undergo pre-shipment inspection (PSI). If there is an issue with MIC37151-1.5BR, 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 MIC37151-1.5BR part is unused and in its original packaging.
Return procedure for MIC37151-1.5BR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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