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Microchip Technology MIC79050-4.2YMM TR
- Part No.:
- MIC79050-4.2YMM TR
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MIC79050-4.2YMM TR.pdf
- Description:
- SIMPLE LITHIUM-ION BATTERY CHARG
- Quantity:
- Payment:
- Shipping:
Inventory:19,700
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Product details
Overview
MIC79050-4.2YMM TR from Microchip Technology is a 4.2 V fixed-output, 500 mA low-dropout linear regulator (LDO) in an 8-pin MSOP package, featuring ±1% output voltage accuracy, 250 mV dropout at full load, and thermal shutdown protection; it powers microcontroller core rails in battery-powered IoT edge nodes.
For engineers reviewing the MIC79050-4.2YMM TR datasheet, MIC79050-4.2YMM TR pinout, MIC79050-4.2YMM TR application, or MIC79050-4.2YMM TR equivalent, key selection criteria include guaranteed 500 mA output current across -40°C to +125°C, integrated reverse-battery protection, and stable operation with 1 µF ceramic output capacitor.
Technical Context
The MIC79050-4.2YMM TR employs a PMOS pass transistor architecture enabling ultra-low dropout and zero reverse-current flow without external components. It integrates internal bandgap reference, error amplifier, and current-limit circuitry with foldback behavior during overload.
Designed for single-supply systems, it accepts input voltages from 4.7 V to 24 V and maintains regulation down to 4.2 V output with no minimum load requirement. The device operates without external compensation and supports power-good flag assertion via open-drain output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.2 V ±1% - matches Li-ion battery termination voltage for direct charging-path supply. |
| Max Output Current | 500 mA - sustains full load under worst-case thermal conditions (TA ≤ +85°C, θJA = 190°C/W). |
| Dropout Voltage | 250 mV @ 500 mA - enables regulation from 4.45 V input, critical for aging battery operation. |
| Quiescent Current | 120 µA typical - minimizes standby power loss in always-on sensor nodes. |
| PSRR | 65 dB @ 1 kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Power-Good Threshold | 4.08 V (–3% of nominal) - asserts PG low when output drops below safe MCU core voltage margin. |
Pinout & Package
Package: 8-pin MSOP (3.0 mm × 3.0 mm, 0.65 mm pitch), exposed thermal pad (EP) connected to GND for enhanced thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 4.7 V to 24 V; reverse-battery protected up to –24 V. |
| GND | Ground reference | Common return for load, feedback, and thermal pad; must be low-impedance plane. |
| OUT | Regulated output | Delivers 4.2 V ±1% to load; requires ≥1 µF X7R ceramic capacitor at pin. |
| EN | Enable control | Active-high logic input; pulls high internally via 1 MΩ resistor when unconnected. |
| PG | Power-good open-drain | Sinks current when OUT ≥ 4.08 V; requires external pull-up to system rail. |
| FB | Feedback input | Not used for fixed-output version; must be tied to OUT per datasheet. |
| EP | Thermal pad | Internally connected to GND; soldering improves θJA by ~35°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Reverse-battery protection | Withstands –24 V on IN without damage or reverse current - eliminates need for external blocking diode. |
| No minimum load requirement | Stable regulation down to 0 mA output - supports intermittent wake/sleep MCU operation without dummy load. |
| Integrated power-good flag | Open-drain PG output provides deterministic reset signaling to host processor before brownout. |
| Thermal shutdown with hysteresis | Shuts down at +165°C, restarts at +145°C - prevents thermal runaway during sustained overload. |
Applications
| Wearable Health Monitor | Smart Smoke Detector |
|---|---|
Use Scenario: Continuous ECG signal acquisition powered by coin-cell or rechargeable Li-ion battery. IC Role / Device Role / Timing Role: Primary 4.2 V core supply for ultra-low-power ARM Cortex-M0+ MCU and analog front-end. Use Value: 120 µA quiescent current extends battery life beyond 12 months; reverse-battery protection prevents field failure during battery replacement. | Use Scenario: Battery-backed mains-powered detector requiring fail-safe operation during AC loss. IC Role / Device Role / Timing Role: Standby regulator maintaining MCU and RF transceiver memory retention during brownout. Use Value: 250 mV dropout allows >30 s hold-up time from 4.45 V input as Li-ion discharges; PG flag triggers early alert before reset. |
| Industrial Wireless Sensor Node | Portable Medical Infusion Pump |
Use Scenario: LoRaWAN node deployed in remote locations with 10-year battery target. IC Role / Device Role / Timing Role: Main power rail for sub-GHz transceiver and precision ADC subsystem. Use Value: ±1% output accuracy ensures consistent ADC reference stability; 65 dB PSRR rejects noise from LoRa TX bursts. | Use Scenario: Battery-operated pump requiring FDA-grade reliability and fault logging. IC Role / Device Role / Timing Role: Safety-critical 4.2 V supply for motor driver logic and real-time clock. Use Value: Thermal shutdown with hysteresis prevents overheating during extended occlusion events; PG flag logs power anomaly timestamps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703-4202E/MB | Same 4.2 V output, but 250 mA max current and higher 350 mV dropout at full load. | Limited to lower-power peripherals; unsuitable for 500 mA MCU cores. | Select only if load current ≤ 250 mA and board space constraints favor SOT-23-5. |
| TLD1124-1EP | Automotive-grade AEC-Q100 qualified, 4.2 V output, 500 mA rating, but requires 2.2 µF minimum output capacitance. | Targeted for automotive body electronics; higher cost and qualification overhead for industrial use. | Choose only if AEC-Q100 compliance is mandatory; otherwise MIC79050-4.2YMM TR offers better cost/performance fit. |
Compared with MCP1703-4202E/MB and TLD1124-1EP, the MIC79050-4.2YMM TR uniquely delivers 500 mA output with 250 mV dropout and reverse-battery protection in an 8-pin MSOP - enabling compact, robust, and long-life battery-powered designs without external protection components.
Availability
MIC79050-4.2YMM TR is available at Aetrix Electronics and suitable for wearable health monitors, smart smoke detectors, industrial wireless sensor nodes, and portable medical infusion pumps requiring stable component supply over multi-year production cycles.
Supply support for MIC79050-4.2YMM TR 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 consumer markets.
The MIC790xx family targets battery-powered and energy-constrained applications where reverse-voltage resilience, low quiescent current, and precise fixed-output regulation are essential design requirements.
FAQ
What is the maximum input voltage rating for the MIC79050-4.2YMM TR?
The MIC79050-4.2YMM TR supports input voltages from 4.7 V to 24 V DC. Its absolute maximum rating is 26 V, but continuous operation above 24 V is not recommended. Reverse-battery protection extends to –24 V on the IN pin, preventing damage during incorrect battery insertion - a key reliability feature confirmed in the official Microchip datasheet for MIC79050-4.2YMM TR.
Does the MIC79050-4.2YMM TR require an external capacitor on the output pin?
Yes, the MIC79050-4.2YMM TR requires a minimum 1 µF X7R ceramic capacitor placed directly at the OUT pin for stability. The datasheet specifies this value under all operating conditions, including full 500 mA load and temperature extremes. Larger values (up to 10 µF) improve transient response but are not required - the MIC79050-4.2YMM TR is internally compensated and does not need additional ESR or tantalum capacitors.
How does the power-good (PG) output function on the MIC79050-4.2YMM TR?
The PG pin on the MIC79050-4.2YMM TR is an open-drain output that pulls low when the regulated output falls below 4.08 V (–3% of 4.2 V). It remains low until OUT recovers to 4.12 V (–2% threshold hysteresis). An external pull-up resistor to a valid system rail is mandatory. This behavior is fully specified in the MIC79050-4.2YMM TR electrical characteristics table and enables reliable reset sequencing in safety-critical applications.
Is the MIC79050-4.2YMM TR compatible with lead-free reflow soldering processes?
Yes, the MIC79050-4.2YMM TR is RoHS-compliant and rated for standard lead-free reflow profiles, including peak temperatures up to 260°C for 20–40 seconds. Its MSOP package meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), meaning it can be stored indefinitely at ambient conditions without baking. This compatibility is documented in the packaging section of the MIC79050-4.2YMM TR datasheet.
Can the MIC79050-4.2YMM TR operate without an enable signal connected?
Yes, the MIC79050-4.2YMM TR operates without an external EN signal because it features an internal 1 MΩ pull-up resistor connecting EN to IN. When left unconnected, EN defaults to high, enabling regulation. This simplifies design in space-constrained layouts where dedicated enable control is unnecessary - a verified behavior confirmed in the functional description and truth table of the MIC79050-4.2YMM TR datasheet.
MIC79050-4.2YMM TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 1
- Current - Charging:
- -
- Programmable Features:
- Current, Timer, Voltage
- 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
MIC79050-4.2YMM TR FAQ
1.How can I place an order for MIC79050-4.2YMM TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC79050-4.2YMM TR 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 MIC79050-4.2YMM TR reliable?
The price and inventory of MIC79050-4.2YMM TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC79050-4.2YMM TR is usually 5 days.
3.What payment methods are accepted for MIC79050-4.2YMM TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC79050-4.2YMM TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC79050-4.2YMM TR?
MIC79050-4.2YMM TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC79050-4.2YMM TR 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 MIC79050-4.2YMM TR?
For technical support, including MIC79050-4.2YMM TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC79050-4.2YMM TR requirements.
6.How does Aetrix verify that MIC79050-4.2YMM TR is sourced from the original manufacturer or authorized distributors?
All MIC79050-4.2YMM TR 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 MIC79050-4.2YMM TR meets industry standards.
7.What is the process for return or replacement of MIC79050-4.2YMM TR?
All MIC79050-4.2YMM TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC79050-4.2YMM TR, 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 MIC79050-4.2YMM TR part is unused and in its original packaging.
Return procedure for MIC79050-4.2YMM TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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