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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Battery Chargers

Microchip Technology MCP73863T-I/SL

Name: MCP73863T-I/SL
Brand: Microchip Technology
SKU: MCP73863T-I/SL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MCP73863T-I/SL

Manufacturer:: Microchip Technology

Category:: Battery Chargers

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: MCP73863T-I/SL.pdf

Description:: IC BATT CHG LI-ION 1CELL 16SOIC

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Product details

Overview

MCP73863T-I/SL from Microchip Technology is a fully integrated linear lithium-ion/polymer battery charge management controller for single-cell applications, featuring 4.1V/4.2V selectable voltage regulation, ±0.5% voltage accuracy, programmable 100–1200 mA fast-charge current via PROG pin, thermal regulation, and automatic preconditioning of deeply depleted cells. It delivers complete stand-alone charging in space-constrained portable electronics.

For engineers reviewing the MCP73863T-I/SL datasheet, MCP73863T-I/SL pinout, MCP73863T-I/SL application, or MCP73863T-I/SL equivalent, this device supports precise CV/CC charging with integrated pass transistor, reverse-blocking protection, dual status outputs (STAT1/STAT2), thermistor-based temperature monitoring, and safety timers - all critical for reliable Li-ion charging in consumer and industrial battery-powered systems.

Technical Context

The MCP73863T-I/SL implements a three-stage linear charging algorithm: preconditioning (trickle-charge at ~10% of IREG when VBAT < VPTH), constant-current fast charge (IREG set by external PROG resistor), and constant-voltage regulation (VREG selected via VSET = VSS or VDD). It integrates internal current sensing, UVLO (4.25–4.65 V start), thermal shutdown (155°C), and die-temperature-dependent current scaling to prevent overheating.

Its analog architecture includes a precision 1.2 V reference, bias generator for thermistor interface (THREF = 2.55 V typ.), dual comparators for temperature window detection (VT1 = 1.25 V, VT2 = 0.62 V), and open-drain STAT1/STAT2 outputs with 8 mA sink capability. Charge termination occurs when IOUT falls below ~8% of IREG or elapsed time exceeds tTERM (3 hours typical).

Key Specifications

Parameter	Value and Actual Design Meaning
Voltage Regulation	4.1 V or 4.2 V ±0.5% - selectable via VSET pin; enables compatibility with coke/graphite anodes and meets JEITA-compliant charging profiles.
Fast Charge Current	100–1200 mA - programmed externally via PROG-to-VSS resistor; supports high-efficiency charging up to 1.2 A without external MOSFET.
Precondition Threshold	2.70–2.90 V (VSET = VSS) - triggers safe trickle-charge for deeply discharged Li-ion cells to avoid damage or thermal runaway.
Thermal Reference	2.55 V ±30 mV at 25°C - stable bias for NTC/PTC thermistor networks enabling accurate cell temperature monitoring across -40°C to +85°C.
UVLO Threshold	4.25–4.65 V (start), 4.20–4.55 V (stop) - prevents operation under insufficient input supply and ensures graceful shutdown during disconnection.
Charge Termination	8.5 mA typical (PROG = OPEN) - ends CV phase when current drops to ~8% of IREG, ensuring full saturation without overcharge.
Operating Temp	-40°C to +85°C ambient - fully specified for industrial and extended-temperature portable applications.

Pinout & Package

Package: 16-pin SOIC (Small Outline Integrated Circuit), 3.9 mm × 9.9 mm body, 1.27 mm pitch, RoHS-compliant, rated for -40°C to +85°C operation.

Pin/Terminal	Circuit Role	Design Meaning
VSET (Pin 1)	Voltage regulation selection input	Connect to VSS for 4.1 V output; to VDD for 4.2 V output - configures chemistry-specific termination voltage without firmware.
VDD1/VDD2 (Pins 2,3)	Main power input supply	Accepts 4.5–12 V input; powers internal circuitry and gate drive; requires ≥4.7 µF bypass capacitor for stability.
VSS1/VSS2/VSS3 (Pins 4,13,9)	Ground reference terminals	Low-impedance return paths for battery, supply, and sense circuits - minimize ground shift errors in current/voltage regulation.
PROG (Pin 5)	Current programming input	Sets fast charge (IREG), precondition (IPREG), and termination (ITERM) currents via external resistor; enables precise, layout-independent current control.
THREF (Pin 6)	Thermistor bias reference	Provides 2.55 V ±30 mV reference to excite external NTC/PTC thermistor - forms ratiometric temperature sensing network with THERM pin.
THERM (Pin 7)	Temperature sensor input	Compares thermistor divider voltage against VT1/VT2 thresholds (1.25 V / 0.62 V); disables charging if outside 0°C–45°C window (configurable).
TIMER (Pin 8)	Safety timer capacitor connection	Controls fast charge (1.5 h), precondition (60 min), and elapsed time (3 h) safety timers via CTIMER = 0.1 µF - prevents indefinite charging.
VBAT1/VBAT2 (Pins 10,11)	Integrated pass transistor drain	Direct connection to battery positive terminal; internal P-channel MOSFET handles up to 1.2 A with thermal regulation - eliminates external switch.
VBAT3 (Pin 12)	Battery voltage sense input	Precision-resistor-divider feedback node for CV regulation - senses actual battery voltage independent of PCB trace resistance.
EN (Pin 14)	Logic enable input	Active-high control: initiates charge, clears faults, forces termination, or disables auto-recharge - enables host microcontroller coordination.
STAT2 (Pin 15)	Fault status output	Open-drain output indicating fault conditions (thermal, timer expiry, UVLO); sinks 8 mA - drives LED directly or interfaces to MCU GPIO.
STAT1 (Pin 16)	Charge status output	Open-drain output that turns OFF at end-of-charge (MCP73863/4 behavior); sinks 8 mA - provides unambiguous charge completion signal.

Key Features

Feature	Design Value
Integrated P-channel pass transistor	Eliminates need for external MOSFET and associated gate-drive circuitry - reduces BOM count and PCB area in compact chargers.
Reverse-blocking protection	Prevents battery discharge back into the input supply when VDD is removed - extends battery runtime and avoids system brownouts.
Automatic preconditioning	Applies 5–180 mA trickle-charge when VBAT < 2.8 V - safely recovers deeply depleted Li-ion cells without user intervention or firmware logic.
Thermal regulation with current scaling	Dynamically reduces charge current above ~100°C die temperature - maintains safe operation under high ambient or poor heatsinking conditions.
Charge status signaling (STAT1 OFF at EOC)	STAT1 transitions from active-low to high-impedance at end-of-charge - provides clean, glitch-free hardware indication for LED or MCU polling.

Applications

Smartphone Charging Circuit	Digital Camera Battery Pack
Use Scenario: Standalone USB-powered charging for sealed Li-ion battery packs in smartphones with no host processor supervision. IC Role / Device Role / Timing Role: Primary linear charge controller managing CC/CV profile, temperature cutoff, and LED status indication without software. Use Value: Enables compact, low-cost, certified charging solution meeting IEC 62368-1 safety requirements with ±0.5% voltage accuracy and automatic thermal foldback.	Use Scenario: Rechargeable battery module inside digital cameras requiring safe, autonomous charging during cradle docking. IC Role / Device Role / Timing Role: Fully integrated charger IC handling precondition, fast charge, CV termination, and fault reporting via STAT1/STAT2 LEDs. Use Value: Delivers 4.2 V ±0.5% regulation and 1.2 A max current with integrated pass FET - eliminates discrete power path design effort and validation.
Portable Medical Monitor	Bluetooth Headset Docking Station
Use Scenario: Battery-powered handheld medical device needing reliable, temperature-monitored charging in clinical environments. IC Role / Device Role / Timing Role: Safety-critical charge manager enforcing JEITA-compliant temperature windows (0°C–45°C) and dual-threshold thermistor monitoring. Use Value: Provides certified thermal protection with VT1/VT2 hysteresis and THREF ratiometric bias - ensures compliance with ISO 13485 and IEC 60601-1.	Use Scenario: Compact docking station for Bluetooth headsets with integrated Li-ion battery and minimal component count. IC Role / Device Role / Timing Role: Single-chip charger providing automatic recharge, LED status feedback, and reverse-blocking when AC adapter is unplugged. Use Value: Reduces bill-of-materials by integrating current sense, pass transistor, and status drivers - accelerates time-to-market for consumer accessories.

Smartphone Charging Circuit

Digital Camera Battery Pack

Use Scenario: Standalone USB-powered charging for sealed Li-ion battery packs in smartphones with no host processor supervision.

IC Role / Device Role / Timing Role: Primary linear charge controller managing CC/CV profile, temperature cutoff, and LED status indication without software.

Use Value: Enables compact, low-cost, certified charging solution meeting IEC 62368-1 safety requirements with ±0.5% voltage accuracy and automatic thermal foldback.

Use Scenario: Rechargeable battery module inside digital cameras requiring safe, autonomous charging during cradle docking.

IC Role / Device Role / Timing Role: Fully integrated charger IC handling precondition, fast charge, CV termination, and fault reporting via STAT1/STAT2 LEDs.

Use Value: Delivers 4.2 V ±0.5% regulation and 1.2 A max current with integrated pass FET - eliminates discrete power path design effort and validation.

Portable Medical Monitor

Bluetooth Headset Docking Station

Use Scenario: Battery-powered handheld medical device needing reliable, temperature-monitored charging in clinical environments.

IC Role / Device Role / Timing Role: Safety-critical charge manager enforcing JEITA-compliant temperature windows (0°C–45°C) and dual-threshold thermistor monitoring.

Use Value: Provides certified thermal protection with VT1/VT2 hysteresis and THREF ratiometric bias - ensures compliance with ISO 13485 and IEC 60601-1.

Use Scenario: Compact docking station for Bluetooth headsets with integrated Li-ion battery and minimal component count.

IC Role / Device Role / Timing Role: Single-chip charger providing automatic recharge, LED status feedback, and reverse-blocking when AC adapter is unplugged.

Use Value: Reduces bill-of-materials by integrating current sense, pass transistor, and status drivers - accelerates time-to-market for consumer accessories.

Equivalent & Alternatives

The following parts are listed as comparable options for similar linear Li-ion charge management applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BQ24075RGTR	Lower max charge current (1.5 A vs. 1.2 A), different STAT pin behavior (pulse vs. OFF), no integrated VSET selection - requires external resistors for voltage setting.	Targets higher-current USB-powered devices; lacks native 4.1 V option for legacy Li-ion chemistries.	Select BQ24075RGTR only if 1.5 A fast charge and I²C configurability are required; MCP73863T-I/SL preferred for fixed-voltage, low-BOM designs.
TP4056	Single 4.2 V output only, no VSET option, no thermistor interface, no preconditioning, lower accuracy (±1.0%), no reverse-blocking.	Suitable for cost-sensitive, non-safety-critical applications like toys or basic power banks without temperature monitoring.	Choose TP4056 only for ultra-low-cost, non-temperature-monitored charging; MCP73863T-I/SL is required where JEITA compliance or 4.1 V support is mandated.

Compared with BQ24075RGTR and TP4056, the MCP73863T-I/SL uniquely combines 4.1/4.2 V selectability, integrated thermistor bias/reference, preconditioning, and reverse-blocking in a single SOIC package - making it optimal for certified, space-constrained, single-cell Li-ion charging where reliability and reduced external components are critical.

Availability

MCP73863T-I/SL is available at Aetrix Electronics and suitable for smartphone battery charging, portable medical monitors, digital camera cradles, and Bluetooth headset docking stations requiring stable component supply, long-term lifecycle support, and guaranteed authenticity.

Supply support for MCP73863T-I/SL 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 Inc. is a leading provider of microcontrollers, analog devices, and Flash-IP solutions, headquartered in Chandler, Arizona, serving automotive, industrial, communications, and consumer markets.

The MCP7386X product line was designed specifically for highly integrated, low-component-count linear Li-ion/Li-polymer battery charging in space- and cost-constrained portable electronics - emphasizing safety, accuracy, and autonomous operation.

FAQ

What is the function of the VSET pin on the MCP73863T-I/SL?

The VSET pin on the MCP73863T-I/SL selects the regulated battery voltage: connecting VSET to VSS sets 4.1 V output for coke-anode cells, while connecting to VDD sets 4.2 V for graphite-anode cells. This hardware-selectable feature eliminates firmware configuration and ensures JEITA-compliant charging without external components.

How does the MCP73863T-I/SL handle deeply depleted batteries?

The MCP73863T-I/SL automatically enters preconditioning mode when VBAT falls below 2.70–2.90 V (depending on VSET state), applying a controlled 5–180 mA trickle-charge current. This safely restores voltage before initiating fast charge, preventing lithium plating and thermal stress in deeply discharged Li-ion cells.

What is the difference between STAT1 behavior in MCP73863T-I/SL and MCP73861T-I/SL?

The MCP73863T-I/SL drives STAT1 LOW during charging and turns it OFF (high-impedance) at end-of-charge, whereas the MCP73861T-I/SL flashes STAT1 upon completion. This OFF-state signal provides unambiguous hardware-level EOC detection for LED control or microcontroller polling without timing dependencies.

Can the MCP73863T-I/SL be used for dual-cell (8.4 V) battery charging?

No - the MCP73863T-I/SL is part of the MCP73861/3 variant group, supporting only single-cell Li-ion/Li-polymer batteries with 4.1 V or 4.2 V regulation. For dual-cell applications requiring 8.2 V or 8.4 V, the MCP73862T-I/SL or MCP73864T-I/SL must be used instead.

What thermal protection mechanisms does the MCP73863T-I/SL implement?

The MCP73863T-I/SL implements two-tier thermal protection: (1) thermal regulation - dynamically scales down charge current above ~100°C die temperature to maintain safe operation, and (2) thermal shutdown - suspends charging entirely if die temperature exceeds 155°C, resuming only after cooling by ~10°C. Both features are fully internal and require no external components.

MCP73863T-I/SL Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 16-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Battery Chemistry:: Lithium Ion/Polymer

Number of Cells:: 1

Current - Charging:: Constant - Programmable

Programmable Features:: Timer

Fault Protection:: -

Charge Current - Max:: 1.38A

Battery Pack Voltage:: 4.2V

Voltage - Supply (Max):: 12V

Interface:: -

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SOIC

MCP73863T-I/SL FAQ

1.How can I place an order for MCP73863T-I/SL through Aetrix?

Please submit a Request for Quotation (RFQ) for MCP73863T-I/SL 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 MCP73863T-I/SL reliable?

The price and inventory of MCP73863T-I/SL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP73863T-I/SL is usually 5 days.

3.What payment methods are accepted for MCP73863T-I/SL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73863T-I/SL transactions.

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MCP73863T-I/SL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MCP73863T-I/SL 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 MCP73863T-I/SL?

For technical support, including MCP73863T-I/SL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73863T-I/SL requirements.

6.How does Aetrix verify that MCP73863T-I/SL is sourced from the original manufacturer or authorized distributors?

All MCP73863T-I/SL 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 MCP73863T-I/SL meets industry standards.

7.What is the process for return or replacement of MCP73863T-I/SL?

All MCP73863T-I/SL units undergo pre-shipment inspection (PSI). If there is an issue with MCP73863T-I/SL, 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 MCP73863T-I/SL part is unused and in its original packaging.

Return procedure for MCP73863T-I/SL:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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