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Microchip Technology MCP73862-I/ML
- Part No.:
- MCP73862-I/ML
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
MCP73862-I/ML.pdf
- Description:
- IC BATT CHG LI-ION 2CELL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,267
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Product details
Overview
MCP73862-I/ML from Microchip Technology is a dual-cell linear lithium-ion/lithium-polymer battery charge management controller with integrated P-channel pass transistor, current sense, and reverse-blocking protection. It delivers ±0.5% voltage regulation at 8.2V or 8.4V (selected via VSET pin), supports up to 1.2A fast-charge current, and operates across an 8.7–12V input range for dual-series Li-ion packs. It is used in cradle chargers and portable medical instruments requiring precise, thermally regulated charging.
For engineers reviewing the MCP73862-I/ML datasheet, MCP73862-I/ML pinout, MCP73862-I/ML application, or MCP73862-I/ML equivalent, this page provides verified technical context, validated pin functions, confirmed dual-cell voltage options (8.2V/8.4V), thermal shutdown at 155°C, and real-world design meanings for PROG-set current, THERM/THREF temperature monitoring, and STAT1/STAT2 status outputs.
Technical Context
The MCP73862-I/ML implements a fully autonomous linear charging algorithm with preconditioning, constant-current (CC), and constant-voltage (CV) phases - all managed by internal state logic without host intervention. Its VSET pin selects between 8.2V and 8.4V CV regulation, while PROG sets IREG (100–1200 mA), ITERM (~8% of IREG), and IPREG (~10% of IREG) via external resistor scaling.
Thermal regulation dynamically reduces charge current above ~100°C to prevent die overheating, and thermal shutdown suspends charging at 155°C with 10°C hysteresis. The device uses three VSS pins and an exposed pad (EP) tied to ground for low-impedance thermal and electrical return, supporting stable operation in space-constrained portable designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Regulation | 8.2V or 8.4V ±0.5% - selectable via VSET tie to VSS or VDD; enables safe charging of dual-series Li-ion cells with graphite or coke anodes. |
| Input Voltage Range | 8.7V to 12V - ensures compatibility with 9V–12V wall adapters and prevents UVLO dropout during line transients. |
| Fast Charge Current | 100–1200 mA - set by PROG-to-VSS resistor; 1.2A max supports rapid recharge of 2S battery packs up to 2600 mAh. |
| Charge Termination | ~8% of IREG - automatically halts CV phase when current drops below threshold, preventing overcharge and cell stress. |
| Thermal Shutdown | 155°C with 10°C hysteresis - hardware-level safety cutoff independent of control loop, ensuring reliability under sustained high-power dissipation. |
| Operating Temperature | -40°C to +85°C ambient - validated for industrial and portable medical equipment operating in uncontrolled environments. |
| Package Thermal Resistance | 47°C/W (θJA, QFN) - enables 1.2A charging without external heatsink on standard 4-layer PCBs with natural convection. |
Pinout & Package
Package: 16-pin 4 × 4 mm QFN with exposed thermal pad (EP), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSET | Voltage regulation selection input | Tie to VSS for 8.2V output, VDD for 8.4V - configures CV threshold for dual-cell Li-ion chemistry without firmware. |
| VDD1, VDD2 | Main supply inputs | Accept 8.7–12V input; dual pins reduce trace resistance and improve PSRR; require ≥4.7 µF ceramic bypass to VSS. |
| VSS1, VSS2, VSS3, EP | Ground reference terminals | Three dedicated VSS pins plus exposed pad ensure low-impedance return path for high-current charge loop and thermal dissipation. |
| PROG | Current regulation programming node | Resistor to VSS sets fast-charge (IREG), precondition (IPREG), and termination (ITERM) currents simultaneously per scaling law. |
| THERM / THREF | Temperature sensing interface | THREF supplies 2.55V bias; THERM compares against VTHREF/2 and VTHREF/4 to detect out-of-range cell temperature (NTC/PTC). |
| VBAT1, VBAT2 | Pass transistor drain outputs | Connect directly to battery positive; internal P-MOSFET handles full charge current - no external switch required. |
| VBAT3 | Precision battery voltage sense | High-impedance input tied to battery+ via internal resistor divider; enables accurate CV regulation independent of PCB trace IR drop. |
| STAT1 / STAT2 | Open-drain status outputs | STAT1 flashes during active charge (MCP73862); STAT2 sinks current on fault - drive LEDs directly or interface to MCU GPIO with pull-up. |
| EN | Hardware enable/disable control | Active-high logic input; pulling low forces immediate charge termination and clears faults - enables system-level power sequencing. |
| TIMER | Safety timer capacitor connection | CTIMER = 0.1 µF sets 1.5-hour fast-charge timer, 60-minute precondition timer, and 3-hour elapsed-time termination. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P-channel pass transistor | Eliminates need for external MOSFET and gate driver, reducing BOM count and layout area in compact cradle chargers. |
| Reverse-blocking protection | Prevents battery discharge back into the input supply when VDD is removed - critical for USB-powered or hot-pluggable systems. |
| Programmable safety timers | Independent fast-charge (1.5 hr), precondition (60 min), and elapsed-time (3 hr) timeouts prevent thermal runaway during fault conditions. |
| Automatic preconditioning | Applies 10% IREG trickle charge if VBAT < 5.6V (VPTH), safely recovering deeply depleted 2S Li-ion cells without user intervention. |
| Thermal regulation with slowed timer | Reduces IREG as die temperature rises >100°C and scales down safety timer clock to avoid premature timeout during thermal limiting. |
Applications
| Cradle Chargers | Dual-Cell Portable Medical Devices |
|---|---|
Use Scenario: Desktop docking station for handheld ultrasound or glucose meters with removable 2S Li-ion battery packs. IC Role / Device Role / Timing Role: Standalone linear charger managing CC/CV profile, cell temperature monitoring, and LED status indication without MCU involvement. Use Value: Enables compact, cost-optimized cradle design with automatic deep-discharge recovery and thermal foldback - eliminating risk of battery damage during overnight charging. | Use Scenario: Battery-powered ECG monitor or infusion pump requiring FDA-compliant, fail-safe charging in clinical environments. IC Role / Device Role / Timing Role: Primary charge controller enforcing strict voltage accuracy (±0.5%), dual-threshold temperature supervision, and hardware-enforced safety timers. Use Value: Meets IEC 62368-1 thermal and electrical safety requirements via integrated shutdown at 155°C and reverse-blocking protection during battery replacement. |
| Industrial Handheld Terminals | Test & Measurement Battery Packs |
Use Scenario: Ruggedized barcode scanner or field data collector operating across -20°C to +60°C ambient with hot-swap battery support. IC Role / Device Role / Timing Role: Dual-cell charger with wide-input (8.7–12V) tolerance, UVLO hysteresis (8.4–8.95V), and EN-controlled charge enable/disable for system power management. Use Value: Ensures reliable charging from variable industrial power sources while maintaining battery health through precision CV regulation and automatic recharge at VRTH = VREG − 400 mV. | Use Scenario: Calibration-grade multimeter or oscilloscope with swappable 2S Li-ion battery module requiring long-term capacity retention. IC Role / Device Role / Timing Role: High-accuracy charge manager using VBAT3 sense pin to reject PCB trace IR error and deliver true ±0.5% regulation at battery terminals. Use Value: Extends battery cycle life by minimizing overvoltage stress and enabling precise end-of-charge detection via 8% IREG current threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-cell Li-ion charge management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24610RGER | Switch-mode architecture; higher efficiency (>90%) but requires external inductor, FETs, and compensation network. | Preferred for high-power (>2A), thermally constrained applications; less suitable for ultra-low-noise or EMI-sensitive test equipment. | Select BQ24610RGER only when input voltage exceeds 12V or thermal budget prohibits linear dissipation at 1.2A. |
| LTC4000EGN#PBF | Controller-only (no pass transistor); supports N-channel MOSFETs; wider VIN range (4.5–32V); programmable via resistors and caps. | Used in flexible multi-chemistry platforms (Li-ion, LiFePO₄, lead-acid); requires more external components and layout effort. | Choose LTC4000EGN#PBF when designing scalable charger platforms supporting >2S configurations or mixed battery chemistries. |
Compared with BQ24610RGER and LTC4000EGN#PBF, the MCP73862-I/ML offers lowest component count and smallest footprint for fixed 2S Li-ion charging, trading off efficiency for simplicity, EMI-free operation, and guaranteed ±0.5% regulation without trimming.
Availability
MCP73862-I/ML is available at Aetrix Electronics and suitable for cradle chargers, portable medical devices, industrial handheld terminals, and test & measurement battery packs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MCP73862-I/ML 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 interface ICs, with a focus on reliability, longevity, and industrial-grade qualification.
The MCP7386X product line was designed specifically for space-limited, cost-sensitive Li-ion/Li-Po charging applications - delivering fully integrated, stand-alone solutions with minimal external components and robust safety features.
FAQ
What is the maximum input voltage rating for the MCP73862-I/ML?
The MCP73862-I/ML has an absolute maximum VDD rating of 13.5V. Its operational input range is specified as 8.7V to 12V for dual-cell applications. Exceeding 12V may trigger UVLO release but risks violating SOA limits under high current; sustained operation above 12V is not recommended per DS21893F.
How does the MCP73862-I/ML select between 8.2V and 8.4V regulation?
The MCP73862-I/ML selects its constant-voltage threshold using the VSET pin: tying VSET to VSS configures 8.2V regulation, while tying it to VDD selects 8.4V. This hardware-based selection eliminates firmware dependency and ensures deterministic behavior across temperature and supply variations.
Can the MCP73862-I/ML charge a single-cell Li-ion battery?
No - the MCP73862-I/ML is designed exclusively for dual-series Li-ion/Li-Po batteries (2S). Its 8.2V/8.4V regulation range, 8.7–12V input requirement, and preconditioning threshold (5.4–5.9V) are incompatible with single-cell operation. Use MCP73861-I/ML instead for 1S applications.
What is the purpose of the three VSS pins and exposed pad (EP) on the MCP73862-I/ML?
The three VSS pins (VSS1, VSS2, VSS3) and exposed pad (EP) provide low-impedance, high-current return paths for the internal P-MOSFET drain, sense circuitry, and thermal dissipation. All must be connected to the same ground plane to minimize voltage offset errors in current sensing and ensure reliable thermal regulation at 1.2A.
Does the MCP73862-I/ML support battery temperature monitoring?
Yes - the MCP73862-I/ML supports continuous NTC or PTC thermistor-based temperature monitoring via THREF (2.55V bias output) and THERM (comparator input). It triggers charge suspension if sensed voltage falls outside the VTHREF/4 to VTHREF/2 window, corresponding to typical 0°C–45°C safe charging range.
MCP73862-I/ML 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/ML FAQ
1.How can I place an order for MCP73862-I/ML through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP73862-I/ML 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/ML reliable?
The price and inventory of MCP73862-I/ML 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/ML is usually 5 days.
3.What payment methods are accepted for MCP73862-I/ML?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73862-I/ML transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP73862-I/ML?
MCP73862-I/ML orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP73862-I/ML 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/ML?
For technical support, including MCP73862-I/ML datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73862-I/ML requirements.
6.How does Aetrix verify that MCP73862-I/ML is sourced from the original manufacturer or authorized distributors?
All MCP73862-I/ML 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/ML meets industry standards.
7.What is the process for return or replacement of MCP73862-I/ML?
All MCP73862-I/ML units undergo pre-shipment inspection (PSI). If there is an issue with MCP73862-I/ML, 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/ML part is unused and in its original packaging.
Return procedure for MCP73862-I/ML:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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