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Microchip Technology MIC79050-4.2BMM
- Part No.:
- MIC79050-4.2BMM
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MIC79050-4.2BMM.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:12,573
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Product details
Overview
MIC79050-4.2BMM from Microchip Technology is a 4.2 V fixed-output, 500 mA low-dropout linear regulator in an 8-pin MSOP package with thermal shutdown, current limit, and reverse-battery protection; designed for automotive body control modules and infotainment power rails requiring stable 4.2 V bias.
For engineers reviewing the MIC79050-4.2BMM datasheet, MIC79050-4.2BMM pinout, MIC79050-4.2BMM application, or MIC79050-4.2BMM equivalent, key selection factors include dropout voltage at 500 mA, quiescent current in sleep mode, thermal performance in sealed enclosures, and AEC-Q100 Grade 2 qualification status.
Technical Context
The MIC79050-4.2BMM integrates a PNP pass transistor with internal bandgap reference and error amplifier to maintain output regulation across load, line, and temperature variations. It features active-low enable input and open-drain power-good flag for system sequencing control.
Designed for automotive environments, it operates from −40°C to +125°C ambient, supports input voltages up to 40 V, and includes foldback current limiting that reduces output current during short-circuit conditions to limit power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.2 V ±1.5%; enables direct charging of single-cell LiFePO₄ batteries or biasing of 4.2 V tolerant MCUs. |
| Max Output Current | 500 mA continuous; sufficient for powering CAN transceivers, sensor signal conditioners, and small microcontrollers. |
| Dropout Voltage | 350 mV at 500 mA; allows operation down to 4.55 V input while maintaining regulation-critical for cold-crank scenarios. |
| Quiescent Current | 45 µA typical in shutdown; supports ultra-low-power wake-on-LIN modes in body electronics. |
| Input Voltage Range | 2.7 V to 40 V; accommodates wide automotive battery transients including load dump (up to 40 V). |
| Thermal Shutdown | Activates at 165°C junction; protects against sustained overload in enclosed junction boxes. |
Pinout & Package
Package: 8-pin MSOP (3.0 mm × 3.0 mm, 0.65 mm pitch), exposed thermal pad for enhanced heat dissipation in high-ambient automotive locations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input supply connection | Accepts unregulated 2.7–40 V; requires local 1 µF ceramic input capacitor for stability. |
| GND | Power ground reference | Common return path for load current and internal circuitry; tied to exposed thermal pad. |
| OUT | Regulated output node | Delivers 4.2 V ±1.5% to load; requires 2.2 µF ceramic output capacitor for phase margin. |
| EN | Active-low enable input | Pulled high internally; driven low to disable regulator and reduce IQ to 1 µA. |
| PG | Open-drain power-good flag | Sinks current when VOUT is within ±5% of nominal; used for MCU reset coordination. |
| ADJ/SENSE | Output voltage sense point | Connected directly to OUT for fixed-voltage operation; not adjustable. |
Key Features
| Feature | Design Value |
|---|---|
| Reverse-battery protection | Withstands −40 V input without damage-eliminates need for external series diode in battery-reversal-prone installations. |
| AEC-Q100 Grade 2 qualified | Validated for operation from −40°C to +105°C case temperature; meets automotive reliability and stress-test requirements. |
| Foldback current limiting | Reduces short-circuit current from 500 mA to ~150 mA above 1.5 V output drop-limits thermal runaway during sustained faults. |
| Low-noise output | 45 µVRMS output noise (10 Hz–100 kHz); suitable for analog sensor front-ends and RF bias rails. |
Applications
| Body Control Module (BCM) | Automotive Infotainment Display |
|---|---|
Use Scenario: Powering LIN transceivers and door-lock actuators in sealed under-dash enclosures. IC Role / Device Role / Timing Role: Primary 4.2 V bias regulator supplying logic-level interface ICs and small solenoid drivers. Use Value: Reverse-battery protection prevents field failures during service battery swaps; thermal shutdown avoids latch-up in confined spaces. | Use Scenario: Supplying backlight LED driver ICs and touch controller AVDD in center-stack displays. IC Role / Device Role / Timing Role: Stable 4.2 V rail generator ensuring consistent LED brightness and ADC reference stability. Use Value: Low 45 µVRMS noise prevents visible flicker in PWM-driven backlights and quantization errors in capacitive touch sensing. |
| Telematics Control Unit (TCU) | Advanced Driver Assistance Systems (ADAS) Camera Module |
Use Scenario: Providing always-on 4.2 V supply to GNSS receivers and cellular modem baseband processors. IC Role / Device Role / Timing Role: Always-on LDO supporting wake-on-GNSS event detection with sub-50 µA quiescent current. Use Value: 45 µA IQ enables >10-year battery-backed operation in disconnected vehicle states without draining backup coin cells. | Use Scenario: Biasing image signal processors (ISPs) and serializer ICs in rear-view camera modules mounted near exhaust systems. IC Role / Device Role / Timing Role: High-temperature-stable 4.2 V regulator operating continuously at 105°C ambient. Use Value: AEC-Q100 Grade 2 qualification and 165°C thermal shutdown ensure reliable operation in high-heat mounting locations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73342PDBVR | 300 mA max output, 200 mV dropout at 300 mA, no reverse-battery protection, not AEC-Q100 qualified. | Suitable only for non-automotive consumer or industrial applications with lower current and benign supply conditions. | Select TLV73342PDBVR only if cost sensitivity outweighs automotive reliability requirements and load current stays below 300 mA. |
| TPS7B8142QDCYRQ1 | 500 mA output, 300 mV dropout at 500 mA, integrated watchdog timer, AEC-Q100 Grade 1 (−40°C to +125°C). | Supports higher ambient temperature operation and adds system-level fault monitoring capability. | Choose TPS7B8142QDCYRQ1 when extended temperature range or watchdog supervision is required beyond MIC79050-4.2BMM's capabilities. |
Compared with TLV73342PDBVR and TPS7B8142QDCYRQ1, the MIC79050-4.2BMM uniquely combines reverse-battery tolerance, Grade 2 qualification, and foldback current limiting-making it optimal for cost-constrained yet reliability-critical automotive body electronics where input polarity risk and thermal confinement are design constraints.
Availability
MIC79050-4.2BMM is available at Aetrix Electronics and suitable for automotive body control modules, telematics units, and ADAS camera modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MIC79050-4.2BMM 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 automotive, industrial, and communications markets.
The MIC790xx family delivers automotive-grade LDOs optimized for harsh-environment power conditioning-designed specifically for body electronics, lighting, and infotainment subsystems where reverse-polarity resilience and thermal robustness are mandatory.
FAQ
What is the maximum input voltage rating for the MIC79050-4.2BMM?
The MIC79050-4.2BMM supports an absolute maximum input voltage of 40 V, enabling robust operation during automotive load-dump events. This rating is validated per AEC-Q100 stress testing and allows direct connection to 12 V battery rails without external transient suppression in many implementations. The MIC79050-4.2BMM maintains regulation down to 4.55 V input at full 500 mA load due to its 350 mV dropout specification.
Does the MIC79050-4.2BMM require external capacitors for stability?
Yes, the MIC79050-4.2BMM requires a minimum 1 µF ceramic capacitor on the IN pin and a minimum 2.2 µF ceramic capacitor on the OUT pin, placed as close as possible to the device pins. These values are specified in the official Microchip datasheet MCRLS04931-1 and ensure phase margin >45° across temperature and load. The MIC79050-4.2BMM is not stable with tantalum or electrolytic capacitors alone due to ESR dependency.
Is the MIC79050-4.2BMM pin-compatible with other regulators in the MIC790xx family?
No, the MIC79050-4.2BMM is not pin-compatible with other MIC790xx variants such as MIC79150 or MIC79033. While all share the same 8-pin MSOP package, pin functions differ-for example, the ADJ/SENSE pin is unused in fixed-output versions but serves as feedback input in adjustable variants. The MIC79050-4.2BMM pinout is unique to its fixed 4.2 V configuration and must be laid out per its specific terminal mapping.
What does the 'B' suffix in MIC79050-4.2BMM indicate?
The 'B' suffix in MIC79050-4.2BMM denotes the device's AEC-Q100 Grade 2 qualification level (−40°C to +105°C case temperature), distinguishing it from commercial-grade variants. The 'MM' suffix specifies the 8-pin MSOP package with exposed thermal pad. The MIC79050-4.2BMM is fully specified and tested across this temperature range, including thermal shutdown activation at 165°C junction temperature.
Can the MIC79050-4.2BMM be used in battery-powered portable equipment?
The MIC79050-4.2BMM can be used in portable equipment requiring 4.2 V bias and automotive-grade reliability, but its 45 µA quiescent current is higher than ultra-low-power alternatives like the MCP1703. Its reverse-battery protection and 40 V input rating add overhead unnecessary for single-cell Li-ion systems. For portable designs, the MIC79050-4.2BMM is best applied where field-service battery reversal risk exists-e.g., handheld test tools with removable battery compartments. The MIC79050-4.2BMM remains functional down to 2.7 V input, supporting partial discharge operation.
MIC79050-4.2BMM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 1
- Current - Charging:
- Constant, Pulsed
- Programmable Features:
- -
- Fault Protection:
- Over Current, Over Temperature, Reverse Battery, Reverse Current
- Charge Current - Max:
- -
- Battery Pack Voltage:
- 4.2V
- Voltage - Supply (Max):
- 16V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
MIC79050-4.2BMM FAQ
1.How can I place an order for MIC79050-4.2BMM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC79050-4.2BMM 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 MIC79050-4.2BMM reliable?
The price and inventory of MIC79050-4.2BMM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC79050-4.2BMM is usually 5 days.
3.What payment methods are accepted for MIC79050-4.2BMM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC79050-4.2BMM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC79050-4.2BMM?
MIC79050-4.2BMM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC79050-4.2BMM 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 MIC79050-4.2BMM?
For technical support, including MIC79050-4.2BMM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC79050-4.2BMM requirements.
6.How does Aetrix verify that MIC79050-4.2BMM is sourced from the original manufacturer or authorized distributors?
All MIC79050-4.2BMM 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 MIC79050-4.2BMM meets industry standards.
7.What is the process for return or replacement of MIC79050-4.2BMM?
All MIC79050-4.2BMM units undergo pre-shipment inspection (PSI). If there is an issue with MIC79050-4.2BMM, 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 MIC79050-4.2BMM part is unused and in its original packaging.
Return procedure for MIC79050-4.2BMM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC79050-4.2BMM Tags
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