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Microchip Technology MIC79110YML-TR
- Part No.:
- MIC79110YML-TR
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 10-VFDFN Exposed Pad, 10-MLF®
- Datasheet:
-
MIC79110YML-TR.pdf
- Description:
- IC BATT CHG LI-ION ADJ 10MLF
- Quantity:
- Payment:
- Shipping:
Inventory:5,466
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Product details
Overview
MIC79110YML-TR from Micrel is a precision adjustable-output linear lithium-ion battery charger IC with 1.2A max charge current, ±0.75% output voltage accuracy over –5°C to +60°C, and ±5% current limit accuracy across –40°C to +125°C; it integrates internal pass transistor, programmable end-of-charge flag (via REOC), analog current monitor (ACHG = IBAT/1000), and reverse-polarity protection - used in portable Li-ion battery packs requiring compact, thermally robust charging.
For engineers reviewing the MIC79110YML-TR datasheet, MIC79110YML-TR pinout, MIC79110YML-TR application, or MIC79110YML-TR equivalent, key selection considerations include its adjustable output voltage capability (via ADJ pin), low 550mV dropout at 700mA, thermal shutdown, and dual indicator outputs (digital DEOC and analog ACHG) for real-time charge state monitoring in space-constrained embedded systems.
Technical Context
The MIC79110YML-TR operates as a constant-voltage/constant-current linear charger for single-cell Li-ion batteries, using an internal N-channel pass transistor controlled by precision voltage and current feedback loops. Its ADJ pin accepts resistor-divider feedback for output voltage programming, while RSET and REOC pins set charge current and end-of-charge threshold via 0.2V reference-based equations.
It features dual independent status outputs: DEOC provides open-drain digital end-of-charge signaling with hysteresis, and ACHG delivers a proportional 1/1000-scale current source for analog current monitoring. Shutdown (SD) is active-low with 60mV hysteresis, enabling auto top-off functionality when tied to a battery voltage divider.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Charge Current | 1.2A - supports full-rate charging of standard 18650 and polymer Li-ion cells without external current amplification. |
| Output Voltage Accuracy | ±0.75% over –5°C to +60°C - ensures cell voltage stays within safe 4.2V ±31.5mV window to maximize cycle life and prevent overcharge. |
| Current Limit Accuracy | ±5% over –40°C to +85°C - guarantees consistent CC-phase duration and predictable charge termination across industrial temperature range. |
| Dropout Voltage | 550mV at 700mA over temperature - enables operation from low-headroom inputs (e.g., 5V USB + 0.6V diode drop) while maintaining regulation. |
| End-of-Charge Threshold | Programmable down to 30mA via REOC - allows precise C/33–C/10 termination for diverse battery capacities and chemistries. |
| Analog Monitor Ratio | ACHG = IBAT / 1000 - provides direct current sensing with <1µA error contribution, eliminating need for external sense amplifier or shunt calibration. |
| Junction Temp Range | –40°C to +125°C - supports deployment in automotive accessory modules, industrial handhelds, and high-ambient cradle chargers. |
Pinout & Package
Package: 10-pin 3mm × 3mm DFN (ML), exposed thermal pad, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SD | Active-low shutdown control input | Logic LOW enables charging; tied to battery divider enables auto top-off; 60mV hysteresis prevents chatter near threshold. |
| 2 RSET | Current limit programming node | Connects to ground via resistor; sets ICHG = (0.2 V / RSET) × 1000 - e.g., 167Ω yields 1.2A nominal. |
| 3 ADJ | Feedback input for adjustable output | Receives resistor-divider from BAT; regulates output to 0.6V on ADJ pin - enables custom voltages up to 9.6V. |
| 4 BAT | Battery terminal connection | Direct connection to Li-ion cell anode; senses battery voltage and delivers regulated charge current; includes reverse-current protection. |
| 5,6 VIN | Input power supply pins | Parallel-connected inputs accept 2.5V–16V DC; low-impedance path minimizes IR drop under 1.2A load. |
| 7 ACHG | Analog charge current monitor | Current-source output delivering IBAT/1000 - 1.2A → 1.2mA - enables simple RC-filtered voltage readout with 0.1% scaling fidelity. |
| 8 DEOC | Digital end-of-charge open-drain output | N-channel open drain; pulls LOW during charge, goes high-Z at termination - drives LED or microcontroller interrupt directly. |
| 9 REOC | End-of-charge current threshold setting | Resistor-to-ground sets IEOC = (0.2 V / REOC) × 1000 - e.g., 4kΩ sets 50mA EOC threshold for 500mAh cell. |
| 10 GND | Power and signal reference ground | Common return for all internal circuits; must be low-impedance connection to thermal pad for optimal thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Voltage | Configurable from 0.6V to 9.6V via ADJ feedback - supports non-standard Li-ion variants and multi-cell configurations with external regulation. |
| Integrated Analog Current Monitor | ACHG pin delivers exact 1/1000-scale replica of BAT current - eliminates external sense resistor, op-amp, and ADC gain calibration in battery fuel gauging. |
| Programmable End-of-Charge Flag | DEOC open-drain output toggles on current decay below REOC-set threshold - enables autonomous system sleep/wake without host processor polling. |
| Reverse Polarity & Reverse-Current Protection | Blocks >99.9% of reverse current (<20µA) when VBAT > VIN - protects battery and input source during hot-swap or faulty insertion. |
| Thermal Shutdown with Hysteresis | Activates at +150°C junction, releases at +135°C - prevents latch-up during transient overload while allowing recovery without manual reset. |
Applications
| Cellular Handsets | Digital Cameras |
|---|---|
|
Use Scenario: Compact smartphone battery charging with automatic top-off and low-quiescent maintenance mode. IC Role / Device Role / Timing Role: Primary linear charger IC managing CV/CC profile, end-of-charge detection, and battery voltage supervision. Use Value: Enables 1.2A fast-charge without external MOSFET or controller; ADJ pin allows OEM-specific voltage tuning for aging compensation. |
Use Scenario: High-current burst charging of Li-ion packs in DSLR and mirrorless camera bodies between photo sessions. IC Role / Device Role / Timing Role: Constant-current/constant-voltage regulator with analog current monitoring for thermal-aware charge rate adaptation. Use Value: ACHG output feeds MCU ADC for real-time charge current logging; low 550mV dropout sustains regulation even with partially depleted USB input. |
| Portable Medical Meters | USB-Cradle Chargers |
|
Use Scenario: Rechargeable handheld glucose meters and blood pressure monitors requiring certified, stable Li-ion charging in clinical environments. IC Role / Device Role / Timing Role: Safety-critical battery management element providing precision voltage regulation and end-of-charge confirmation. Use Value: ±0.75% voltage accuracy ensures compliance with IEC 62133; thermal shutdown and reverse protection meet medical device isolation requirements. |
Use Scenario: Desktop or vehicle-mounted docking station that charges multiple devices simultaneously via shared 5V/9V input rails. IC Role / Device Role / Timing Role: Standalone charger IC per battery slot, coordinated via DEOC signals to manage shared input current budget. Use Value: DEOC high-Z state signals host controller to enable next-slot charging; SD pin allows synchronized enable/disable across parallel MIC79110YML-TR units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar lithium-ion linear charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023BRSBR | Multi-rail PMIC with integrated 1A Li-ion charger, buck converters, LDOs; requires external I2C control and configuration. | Targeted at complex SoC-powered systems needing power sequencing and dynamic voltage scaling - not standalone charger replacement. | Select when system requires integrated power management beyond charging; avoid if only linear charger functionality is needed. |
| BQ24075RGTR | 1A linear charger with USB-compatible input current limit, STAT pin instead of DEOC, no analog current monitor (ACHG). | Optimized for USB-hosted portable devices with strict input current constraints; lacks programmable EOC threshold and analog monitoring. | Choose for cost-sensitive USB-powered designs where 1A suffices and analog current feedback is unnecessary. |
Compared with TPS65023BRSBR and BQ24075RGTR, the MIC79110YML-TR offers superior analog current monitoring (ACHG), fully programmable end-of-charge threshold (REOC), and wider input voltage range (2.5V–16V), making it ideal for non-USB, high-accuracy, self-contained Li-ion charging in industrial and medical equipment.
Availability
MIC79110YML-TR is available at Aetrix Electronics and suitable for cellular handsets, portable medical meters, digital cameras, and USB-cradle chargers requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MIC79110YML-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
Micrel Inc. was a U.S.-based analog and mixed-signal semiconductor company founded in 1978, acquired by Microchip Technology in 2015; known for high-reliability power management, timing, and interface ICs.
The MIC79110YML-TR belongs to Micrel's linear battery charger product line, designed specifically for compact, thermally efficient, and highly accurate single-cell Li-ion charging in portable consumer and industrial electronics.
FAQ
What is the output voltage configuration of the MIC79110YML-TR?
The MIC79110YML-TR is the adjustable-output variant of the MIC79110 family, using the ADJ pin with external resistor divider to set output voltage from 0.6V to 9.6V. Unlike the fixed 4.2V MIC79110-4.2YML, the MIC79110YML-TR does not have internal voltage reference - its regulation point is determined solely by the feedback network connected to ADJ and BAT pins.
How does the MIC79110YML-TR implement end-of-charge detection?
The MIC79110YML-TR uses the REOC pin to set a precise end-of-charge current threshold via external resistor; when battery charge current falls below IEOC = (0.2 V / REOC) × 1000, the DEOC pin transitions from LOW to high-impedance state. This digital flag can drive an LED or microcontroller interrupt without additional logic, and the MIC79110YML-TR maintains this state until shutdown or input reset.
Can the MIC79110YML-TR be used for auto top-off charging?
Yes - the MIC79110YML-TR supports auto top-off by connecting the SD pin to a resistor divider from BAT. When battery voltage drops below the SD turn-on threshold (~0.93 V on divider), charging resumes; when DEOC goes high-Z at termination, the divider voltage rises above ~1.05 V, disabling the part. This closed-loop behavior is confirmed in Micrel Application Note AN-12, Figure 3 for MIC79110YML-TR.
What thermal protection features does the MIC79110YML-TR include?
The MIC79110YML-TR incorporates thermal shutdown that activates at approximately +150°C junction temperature and releases hysteresis at +135°C. It also features low 550mV dropout voltage at 700mA, reducing power dissipation, and a thermally enhanced 3mm × 3mm DFN package with exposed pad for PCB heat sinking - enabling reliable 1.2A operation in ambient temperatures up to +85°C with proper layout.
Does the MIC79110YML-TR provide reverse-battery protection?
Yes - the MIC79110YML-TR includes built-in reverse-battery protection that limits reverse current to less than 20 µA when VBAT exceeds VIN, even with SD held LOW. This feature is specified in the Electrical Characteristics table under "VBAT Reverse Current" and applies across the full –40°C to +125°C junction temperature range, protecting both battery and input source during misconnection events.
MIC79110YML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad, 10-MLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- -
- Current - Charging:
- -
- Programmable Features:
- -
- Fault Protection:
- Over Current, Over Temperature, Reverse Current
- Charge Current - Max:
- 1.2A
- Battery Pack Voltage:
- -
- Voltage - Supply (Max):
- 16V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MLF® (3x3)
MIC79110YML-TR FAQ
1.How can I place an order for MIC79110YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC79110YML-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 MIC79110YML-TR reliable?
The price and inventory of MIC79110YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC79110YML-TR is usually 5 days.
3.What payment methods are accepted for MIC79110YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC79110YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC79110YML-TR?
MIC79110YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC79110YML-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 MIC79110YML-TR?
For technical support, including MIC79110YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC79110YML-TR requirements.
6.How does Aetrix verify that MIC79110YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC79110YML-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 MIC79110YML-TR meets industry standards.
7.What is the process for return or replacement of MIC79110YML-TR?
All MIC79110YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC79110YML-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 MIC79110YML-TR part is unused and in its original packaging.
Return procedure for MIC79110YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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