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Microchip Technology MCP73871T-4CCI/ML
- Part No.:
- MCP73871T-4CCI/ML
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
MCP73871T-4CCI/ML.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:9,893
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Product details
Overview
MCP73871T-4CCI/ML from Microchip Technology is a fully integrated linear Li-Ion/Li-Polymer battery charge management IC with system load sharing, supporting dual input sources (USB or AC-DC adapter), ±0.5% voltage regulation at 4.20 V, 1.8 A total input current limit, and thermal regulation. It powers portable electronics while autonomously prioritizing system load over battery charging via Voltage Proportional Current Control (VPCC).
For engineers reviewing the MCP73871T-4CCI/ML datasheet, MCP73871T-4CCI/ML pinout, MCP73871T-4CCI/ML application, or MCP73871T-4CCI/ML equivalent, key selection criteria include its 4.20 V fixed charge voltage option, 20-pin QFN (4 mm × 4 mm) package with exposed thermal pad, resistor-programmable fast charge current (50 mA–1 A), integrated reverse discharge protection, and battery temperature monitoring via NTC thermistor interface.
Technical Context
The MCP73871T-4CCI/ML implements a constant-current/constant-voltage (CC/CV) charge algorithm with four factory-set voltage options (4.10 V/4.20 V/4.35 V/4.40 V); this variant is configured for 4.20 V ±0.5% regulation. It employs ideal diode power-path management to enable simultaneous system operation and battery charging while enforcing USB-compliant current limits (100 mA or 500 mA) when SEL = low.
Thermal regulation dynamically reduces charge current above die temperature thresholds (150 °C shutdown, 10 °C hysteresis), and VPCC adjusts charge current in response to input voltage droop-ensuring stable system supply under weak or high-impedance sources. The device integrates pass transistors (200 mΩ RDS(on)), current sensing, and safety timer (6-hour default, enabled via TE pin).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Voltage | 4.20 V ±0.5% - Precise termination for standard single-cell Li-Ion batteries; avoids overcharge and extends cycle life. |
| Max Input Current | 1.8 A total - Shared between system load and battery charge; enables high-power portable designs without external current limiting. |
| Fast Charge Current | 50 mA to 1 A - Resistor-programmable via PROG1; supports wide battery capacity range (e.g., 100 mAh to 2000 mAh). |
| Operating Temp | −40 °C to +85 °C - Fully specified ambient range; suitable for consumer and industrial portable equipment. |
| Package | 20-Lead QFN (4 mm × 4 mm) with exposed thermal pad - Low-profile, thermally efficient layout; requires PCB thermal pad connection to VSS. |
| Input Sources | USB port (100/500 mA selectable) or AC-DC adapter - Automatic source arbitration; complies with USB 2.0 power delivery limits. |
| Safety Features | Thermal shutdown (150 °C), UVLO, preconditioning (0.1C), automatic recharge, and timer-based charge timeout - Comprehensive fault coverage per IEC 62368-1 requirements. |
Pinout & Package
20-Lead QFN (4 mm × 4 mm) with exposed thermal pad (EP), internally connected to VSS. Requires soldering EP to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 20 (OUT) | System output terminal | Delivers regulated power to system load; maintains operation even with deeply depleted or absent battery. |
| 2 (VPCC) | Voltage proportional charge control input | Enables dynamic reduction of charge current when input voltage sags; prevents system brownout during high load. |
| 3 (SEL) | Input source selection | High = AC-DC adapter mode (1.8 A total current); Low = USB mode (100/500 mA compliance). |
| 4 (PROG2) | USB current limit select | Digital input: Low = 100 mA, High = 500 mA; sets USB unit load per specification. |
| 5 (THERM) | NTC thermistor interface | 50 μA bias current source; monitors battery temperature using 10 kΩ NTC; halts charge outside safe window (0.25 V–1.24 V). |
| 6 (PG) | Power Good status output | Open-drain indicator: active-low when input > UVLO threshold and > VBAT; signals valid external power presence. |
| 7 (STAT2) | Charge status output 2 | Open-drain; indicates CHARGE COMPLETE (low) or FAULT (low + STAT1 low); used with host MCU or LED. |
| 8 (STAT1/LBO) | Charge status / Low Battery Output | Open-drain; low during charging or LBO condition (VBAT < 3.1 V, per "C" suffix); dual-function pin reduces BOM count. |
| 9 (TE) | Timer Enable | Active-low enable for 6-hour safety timer; disabling allows indefinite charge for specialized applications. |
| 10, 11, EP (VSS) | Ground reference / thermal pad | Common 0 V reference for battery, system, and input; EP must be soldered to PCB ground for thermal dissipation and noise immunity. |
| 12 (PROG3) | Termination set point | Resistor-to-VSS sets end-of-charge current ratio (7.5–12.5% of IREG); enables precise cutoff for varied chemistries. |
| 13 (PROG1) | Fast charge current setting | Resistor-to-VSS programs IREG (50 mA–1 A); defines maximum CC phase current for both USB and AC modes. |
| 14, 15 (VBAT) | Battery positive connection | Direct connection to Li-Ion cell anode; bypass capacitor (≥4.7 μF) required for stability during charge/discharge transients. |
| 16 (VBAT_SENSE) | Battery voltage sense | High-impedance feedback node; internal precision divider regulates VBAT to exact VREG; improves accuracy vs. direct VBAT routing. |
| 17 (CE) | Charge Enable | Active-high digital enable; disables all charging functions when low; compatible with 1.8 V logic. |
| 18, 19 (IN) | Power supply input | Accepts 4.3 V–6 V (min VREG + 0.3 V); requires ≥4.7 μF ceramic bypass to VSS near pins for EMI suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage Proportional Current Control (VPCC) | Dynamic charge current scaling based on input voltage; ensures uninterrupted system operation during USB cable dropouts or wall adapter sag. |
| Integrated Power-Path Management | Low-loss ideal diode architecture (200 mΩ RDS(on)) enables seamless transition between battery and input power without external MOSFETs or controllers. |
| Factory-Set 4.20 V Charge Voltage | ±0.5% tolerance at +25°C; eliminates external voltage-setting components and calibration for standard Li-Ion cells. |
| Resistor-Programmable Safety Timer | 6-hour default timeout (per "C" in part number); prevents thermal runaway during abnormal conditions; disable via TE pin. |
| NTC-Based Battery Temperature Monitoring | Internal 50 μA bias and dual-threshold comparator (0.25 V / 1.24 V); supports industry-standard 10 kΩ NTCs without external circuitry. |
| Low-Battery Indicator (LBO) | 3.1 V threshold (per "C" suffix); provides early warning before system brownout; shared with STAT1 to minimize pin count. |
Applications
| Portable Media Players | Bluetooth® Headsets |
|---|---|
|
Use Scenario: Compact audio playback devices requiring continuous runtime from single-cell Li-Ion batteries with frequent USB recharging. IC Role / Device Role: Autonomous charge manager and system power router; supplies 3.3 V system rail directly from IN or VBAT while charging. Use Value: Enables "charge while playing" functionality with no user intervention; VPCC prevents audio dropout during USB cable flex or PC sleep transitions. |
Use Scenario: Ultra-low-power wearable audio accessories needing reliable, space-constrained battery management. IC Role / Device Role: Dual-role power controller: delivers regulated OUT voltage to Bluetooth SoC and manages 150–300 mAh Li-Polymer cell charging. Use Value: Eliminates need for discrete load switches and charge ICs; LBO at 3.1 V triggers firmware shutdown before RF link failure. |
| Digital Cameras | Portable Medical Devices |
|
Use Scenario: Intermittent high-current imaging devices drawing bursts >500 mA while maintaining battery health across hundreds of cycles. IC Role / Device Role: Thermal-regulated CC/CV charger with 1.8 A total input budget; routes peak current from AC adapter to system and battery simultaneously. Use Value: Prevents overheating during rapid-fire shooting; preconditioning (0.1C) safely revives deeply discharged cells after storage. |
Use Scenario: FDA-cleared handheld diagnostics tools requiring fail-safe, traceable battery operation in clinical environments. IC Role / Device Role: Safety-certified charge controller with redundant protections: timer, thermal cutoff, UVLO, and NTC-monitored temperature window. Use Value: Meets IEC 62368-1 Clause 6.3.2 for battery fire risk mitigation; PG and STAT outputs provide real-time status to host MCU for audit logging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Li-Ion charge management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24075RGTR | Fixed 4.2 V charge voltage, 1.2 A max charge current, no VPCC, no LBO output, 16-pin QFN | Lacks system load sharing priority and battery temperature monitoring; suited for cost-sensitive, low-power USB-only devices | Select if design uses only USB input, requires lower BOM cost, and does not need thermal or low-battery signaling. |
| MAX1555EZK+T | Fixed 4.2 V, 500 mA max charge current, no programmable termination, no THERM pin, SOT-23-6 package | Minimal footprint but no NTC support, no system load sharing, limited to USB 100 mA/500 mA only | Choose for ultra-small wearables where board space is critical and battery safety monitoring is handled externally. |
Compared with BQ24075RGTR and MAX1555EZK+T, the MCP73871T-4CCI/ML uniquely combines VPCC-based load priority, integrated NTC interface, and 3.1 V LBO in a thermally robust 20-pin QFN-making it optimal for mid-power portable systems demanding reliability and feature completeness.
Availability
MCP73871T-4CCI/ML is available at Aetrix Electronics and suitable for portable media players, Bluetooth headsets, digital cameras, and portable medical devices requiring stable component supply, long-term lifecycle support, and full production traceability.
Supply support for MCP73871T-4CCI/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 Inc. is a leading provider of microcontrollers, analog devices, and battery management solutions, serving automotive, industrial, and consumer markets with high-reliability silicon and development tools.
The MCP73871 product line delivers integrated Li-Ion charge management with system load sharing for space-constrained portable electronics-designed to reduce external component count while meeting USB compliance and safety standards.
FAQ
What is the charge voltage setting for MCP73871T-4CCI/ML?
The MCP73871T-4CCI/ML is factory-configured for a 4.20 V constant-voltage charge setting with ±0.5% regulation tolerance at +25°C. This matches the standard termination voltage for conventional single-cell Li-Ion batteries and is confirmed by the "4" in the part number per Microchip's Product Identification System.
How does the VPCC function operate in MCP73871T-4CCI/ML?
In the MCP73871T-4CCI/ML, VPCC (Pin 2) enables voltage-proportional current control: when input voltage drops near the 1.23 V VPCC threshold, the IC automatically reduces charge current to preserve system voltage. This prevents brownout during high-load USB operation or marginal wall adapters-without interrupting system power.
What does the "C" in MCP73871T-4CCI/ML indicate?
The first "C" in the suffix denotes the low-battery output (LBO) threshold of 3.1 V, and the second "C" specifies the 6-hour safety timer interval. Both are factory-programmed options confirmed in Section 3.13 and 3.14 of the DS20002090E datasheet, ensuring consistent behavior across production lots.
Can MCP73871T-4CCI/ML support both USB and AC-DC inputs simultaneously?
No-the MCP73871T-4CCI/ML selects between USB and AC-DC inputs via the SEL pin (Pin 3): SEL = Low configures USB mode (100/500 mA limits); SEL = High configures AC-DC mode (up to 1.8 A total). It does not parallel or combine inputs, but autonomously routes available power to system and battery with priority to the system load.
What thermal management features does MCP73871T-4CCI/ML include?
The MCP73871T-4CCI/ML includes three thermal safeguards: (1) die temperature monitoring with 150 °C shutdown (10 °C hysteresis), (2) thermal regulation that reduces charge current above safe junction temperatures, and (3) an exposed thermal pad (EP) tied to VSS requiring PCB copper pour for effective heat dissipation-verified at θJA = 50 °C/W.
MCP73871T-4CCI/ML Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Timer
- Fault Protection:
- Over Temperature
- Charge Current - Max:
- 1.1A
- Battery Pack Voltage:
- 4.4V
- Voltage - Supply (Max):
- 6V
- Interface:
- USB
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (4x4)
MCP73871T-4CCI/ML FAQ
1.How can I place an order for MCP73871T-4CCI/ML through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP73871T-4CCI/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 MCP73871T-4CCI/ML reliable?
The price and inventory of MCP73871T-4CCI/ML are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP73871T-4CCI/ML is usually 5 days.
3.What payment methods are accepted for MCP73871T-4CCI/ML?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73871T-4CCI/ML transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP73871T-4CCI/ML?
MCP73871T-4CCI/ML orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP73871T-4CCI/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 MCP73871T-4CCI/ML?
For technical support, including MCP73871T-4CCI/ML datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73871T-4CCI/ML requirements.
6.How does Aetrix verify that MCP73871T-4CCI/ML is sourced from the original manufacturer or authorized distributors?
All MCP73871T-4CCI/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 MCP73871T-4CCI/ML meets industry standards.
7.What is the process for return or replacement of MCP73871T-4CCI/ML?
All MCP73871T-4CCI/ML units undergo pre-shipment inspection (PSI). If there is an issue with MCP73871T-4CCI/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 MCP73871T-4CCI/ML part is unused and in its original packaging.
Return procedure for MCP73871T-4CCI/ML:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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