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Microchip Technology MCP73862-I/MLG
- Part No.:
- MCP73862-I/MLG
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
MCP73862-I/MLG.pdf
- Description:
- IC BATT CONTRL LI-ION 2CEL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,589
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Product details
Overview
MCP73862-I/MLG from Microchip Technology is a dual-cell linear lithium-ion/lithium-polymer battery charge management controller with integrated P-channel MOSFET pass transistor, precision voltage regulation (±0.5%), programmable 1.2 A fast-charge current, and dual safety timers. It operates from 8.7 V to 12 V input and delivers 8.2 V or 8.4 V regulated output for series-connected Li-ion/Li-Po battery packs in portable medical instruments.
For engineers reviewing the MCP73862-I/MLG datasheet, MCP73862-I/MLG pinout, MCP73862-I/MLG application, or MCP73862-I/MLG equivalent, key selection criteria include dual-cell voltage regulation options (8.2 V / 8.4 V), thermal regulation with die temperature feedback, reverse-blocking protection, automatic preconditioning for deeply depleted cells, and QFN-16 package compatibility with space-constrained PCB layouts.
Technical Context
The MCP73862-I/MLG implements a fully autonomous linear charging algorithm with three distinct phases: preconditioning (trickle-charge at ~10% of IREG), constant-current fast charge, and constant-voltage regulation. It uses internal current sensing and a precision 1.2 V reference to achieve ±0.5% voltage accuracy across –40°C to +85°C ambient.
Thermal regulation dynamically scales charge current above 125°C die temperature, while thermal shutdown suspends charging at 155°C with 10°C hysteresis. All safety timers - preconditioning (60 min), fast-charge (1.5 hr), and elapsed-time termination (3 hr) - are scaled by a single external 0.1 µF capacitor on the TIMER pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulated Output Voltage | 8.2 V or 8.4 V selectable via VSET pin; supports dual-series Li-ion/Li-Po packs with graphite or coke anodes. |
| Fast Charge Current | Up to 1.2 A (PROG = VSS); programmable down to 100 mA (PROG = open); enables rapid recharge of 2S battery systems. |
| Voltage Regulation Accuracy | ±0.5% over –40°C to +85°C; ensures cell-level voltage compliance critical for battery longevity and safety certification. |
| Input Supply Range | 8.7 V to 12 V; UVLO start at 8.45 V and stop at 8.40 V prevents unstable operation during brown-out conditions. |
| Thermal Protection | Dual-stage: thermal regulation begins below 155°C; thermal shutdown halts charging until die cools by ≥10°C. |
| Package | 16-pin 4 mm × 4 mm QFN (MLG suffix); low thermal resistance (θJA = 37°C/W) supports high-power linear operation without heatsink. |
| Operating Temperature | –40°C to +85°C ambient; validated for industrial and portable medical equipment environments. |
Pinout & Package
Package: 16-pin, 4 mm × 4 mm QFN (MLG), exposed thermal pad, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSET | Voltage regulation selection | Connect to VSS for 8.2 V output; connect to VDD for 8.4 V output - sets final battery float voltage. |
| VDD1, VDD2 | Battery management input supply | Dual-input pins accept 8.7–12 V supply; bypassed with ≥4.7 µF ceramic capacitors for stability and noise rejection. |
| VSS1, VSS2, VSS3 | Battery management 0V reference | Three independent ground terminals reduce ground bounce and improve current-sense accuracy in high-dI/dt paths. |
| PROG | Current regulation set | Resistor-to-VSS sets fast charge (IREG), precondition (IPREG), and termination (ITERM) currents proportionally. |
| THREF | Thermistor reference bias | 2.55 V ±3% reference (200 µA source) for biasing external NTC/PTC thermistor networks. |
| THERM | Cell temperature sensor input | Compares thermistor divider voltage to THREF/2 and THREF/4 thresholds; disable by applying THREF/3. |
| TIMER | Timer set | Single 0.1 µF capacitor programs all three safety timers: precondition (60 min), fast-charge (1.5 hr), elapsed (3 hr). |
| VBAT1, VBAT2 | Battery charge control output | Drain terminals of internal P-MOSFET pass device; connect directly to battery positive terminal. |
| VBAT3 | Battery voltage sense | Precision high-impedance sense input tied to battery+; enables accurate regulation independent of trace resistance. |
| EN | Logic enable | Active-high input controls charge initiation, fault clearing, and automatic recharge disable. |
| STAT1, STAT2 | Status outputs | Open-drain, 8 mA sink capable; drive LEDs directly or interface to microcontroller GPIO with pull-up. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P-channel MOSFET pass transistor | Eliminates external high-side switch; reduces BOM count and layout area while maintaining thermal efficiency in QFN package. |
| Reverse-blocking protection | Prevents battery discharge into input supply when VDD is absent - critical for cradle charger and backup power applications. |
| Automatic preconditioning | Applies 5–180 mA trickle-charge below 5.4–5.9 V (VBAT) to safely recover deeply depleted 2S Li-ion cells before fast charge. |
| Charge status and fault indication | Dual open-drain STAT1/STAT2 outputs provide real-time state machine feedback (e.g., charging, done, fault) without MCU polling. |
| Thermal regulation with timer scaling | Reduces charge current above 125°C and slows safety timers proportionally - prevents premature timeout during thermal limiting. |
Applications
| Portable Medical Instruments | Industrial Handheld Scanners |
|---|---|
Use Scenario: Rechargeable 2S Li-ion battery pack powers ultrasound probes and glucose meters requiring reliable, certified charging under variable ambient temperatures. IC Role / Device Role / Timing Role: Dual-cell linear charge controller managing full CC/CV cycle, thermal monitoring, and safety timer enforcement per IEC 62368-1. Use Value: ±0.5% voltage accuracy and –40°C to +85°C operation ensure compliance with medical battery safety standards and field reliability. |
Use Scenario: Rugged barcode scanner used in warehouse logistics with frequent hot-swap battery replacement and intermittent charging. IC Role / Device Role / Timing Role: Autonomous charge manager enabling zero-software, plug-and-play battery reconditioning and end-of-charge detection. Use Value: Integrated reverse-blocking protection prevents battery drain during dock disconnection; STAT1/STAT2 simplify LED status implementation. |
| Test & Measurement Equipment | Mobile Data Terminals |
Use Scenario: Battery-powered oscilloscope or multimeter operating in lab and field environments where battery runtime and longevity are critical. IC Role / Device Role / Timing Role: Precision voltage regulator and current controller ensuring consistent 8.4 V float voltage across battery aging and temperature drift. Use Value: Load regulation ≤0.25% and PSRR ≥42 dB (10 kHz) maintain regulation integrity despite noisy DC adapter inputs. |
Use Scenario: Field-deployed asset tracker with 2S Li-Po battery subjected to wide temperature swings and infrequent charging cycles. IC Role / Device Role / Timing Role: Smart charger implementing automatic recharge when VBAT drops below VRTH (VREG − 200 mV to −600 mV), extending usable runtime. Use Value: Programmable VSET and PROG allow one design to support both 8.2 V (coke anode) and 8.4 V (graphite anode) chemistries. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-cell linear charge management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24075RGTR | Single-cell only (4.2 V max); no dual-series option; uses external N-channel MOSFET; lacks integrated VBAT3 sense. | Not suitable for 2S battery systems; requires redesign for voltage range and topology. | Select only for single-cell applications where cost-per-function favors external FET architecture. |
| LTC4098EUD#PBF | Supports 2S Li-ion (8.4 V) but uses external P-MOSFET; higher quiescent current (25 µA vs. 0.17 µA); no integrated THREF reference. | Requires additional components for thermistor bias and current sense; less compact than MCP73862-I/MLG. | Consider when higher input voltage tolerance (up to 36 V) or external FET control flexibility is required. |
Compared with BQ24075RGTR and LTC4098EUD#PBF, the MCP73862-I/MLG delivers true dual-cell integration - including internal P-MOSFET, VBAT3 sensing, and THREF generation - in a single 4×4 mm QFN, reducing component count and PCB footprint while maintaining ±0.5% regulation accuracy and industrial temperature support.
Availability
MCP73862-I/MLG is available at Aetrix Electronics and suitable for portable medical instruments, industrial handheld scanners, and test & measurement equipment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MCP73862-I/MLG 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 manufacturer specializing in microcontrollers, analog devices, and power management ICs with broad industrial and automotive qualification.
The MCP7386X product line was designed specifically for space-constrained, cost-sensitive Li-ion/Li-Po battery charging in portable electronics - emphasizing integration, safety compliance, and minimal external component count.
FAQ
What is the maximum input voltage rating for the MCP73862-I/MLG?
The MCP73862-I/MLG has an absolute maximum VDD rating of 13.5 V. Its operational input range is specified from 8.7 V to 12 V for dual-cell applications. Exceeding 12 V may trigger undervoltage lockout behavior or compromise long-term reliability, and operation above 13.5 V risks permanent damage per DS21893B-page 3 Absolute Maximum Ratings.
How does the MCP73862-I/MLG select between 8.2 V and 8.4 V output regulation?
The MCP73862-I/MLG selects its regulated output voltage using the VSET pin: connecting VSET to VSS configures 8.2 V regulation, while connecting VSET to VDD configures 8.4 V regulation. This selection is hardwired and determines the final float voltage applied to the 2S battery pack during constant-voltage mode.
Can the MCP73862-I/MLG be used with a single-cell Li-ion battery?
No - the MCP73862-I/MLG is specifically designed for dual-series (2S) Li-ion/Li-Po battery packs with 8.2 V or 8.4 V regulation. Its input voltage range (8.7–12 V), UVLO thresholds (8.40–9.05 V), and internal reference scaling are optimized for two-cell stacks. For single-cell applications, Microchip's MCP73861 is the appropriate family member.
What is the purpose of the VBAT3 pin on the MCP73862-I/MLG?
The VBAT3 pin on the MCP73862-I/MLG provides a high-impedance, precision battery voltage sense input tied directly to the battery's positive terminal. It feeds the internal voltage regulation loop independently of VBAT1/VBAT2 path resistance, ensuring ±0.5% regulation accuracy even with PCB trace losses or connector contact resistance.
Does the MCP73862-I/MLG support temperature monitoring with both NTC and PTC thermistors?
Yes - the MCP73862-I/MLG supports both NTC and PTC thermistors via its THERM and THREF pins. The internal comparator uses ratio-metric thresholds (THREF/2 and THREF/4), making it immune to VDD variation. External resistor networks (RT1, RT2) are calculated per DS21893B-page 15 equations to match the thermistor's resistance-vs-temperature profile.
MCP73862-I/MLG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 2
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Timer
- Fault Protection:
- -
- Charge Current - Max:
- 1.38A
- Battery Pack Voltage:
- 8.4V
- Voltage - Supply (Max):
- 12V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (4x4)
MCP73862-I/MLG FAQ
1.How can I place an order for MCP73862-I/MLG through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP73862-I/MLG 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 MCP73862-I/MLG reliable?
The price and inventory of MCP73862-I/MLG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP73862-I/MLG is usually 5 days.
3.What payment methods are accepted for MCP73862-I/MLG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73862-I/MLG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP73862-I/MLG?
MCP73862-I/MLG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP73862-I/MLG 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 MCP73862-I/MLG?
For technical support, including MCP73862-I/MLG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73862-I/MLG requirements.
6.How does Aetrix verify that MCP73862-I/MLG is sourced from the original manufacturer or authorized distributors?
All MCP73862-I/MLG 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 MCP73862-I/MLG meets industry standards.
7.What is the process for return or replacement of MCP73862-I/MLG?
All MCP73862-I/MLG units undergo pre-shipment inspection (PSI). If there is an issue with MCP73862-I/MLG, 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 MCP73862-I/MLG part is unused and in its original packaging.
Return procedure for MCP73862-I/MLG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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