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Microchip Technology MCP73833-FCI/MF
- Part No.:
- MCP73833-FCI/MF
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MCP73833-FCI/MF.pdf
- Description:
- IC BATT CONTRL LI-ION 1CEL 10DFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MCP73833-FCI/MF from Microchip Technology is a stand-alone linear Li-ion/Li-polymer battery charge management controller in a 10-lead DFN-10 (3 mm × 3 mm) package. It delivers constant-current/constant-voltage charging with thermal regulation, 4.20 V ±0.75% voltage regulation, up to 1 A programmable charge current via external resistor, and integrated reverse discharge protection - enabling compact, USB-compliant portable chargers for consumer electronics.
For engineers reviewing the MCP73833-FCI/MF datasheet, MCP73833-FCI/MF pinout, MCP73833-FCI/MF application, or MCP73833-FCI/MF equivalent, this page provides verified technical context, validated pin functions, real-world application mappings, and confirmed alternative options for battery charging system design and BOM optimization.
Technical Context
The MCP73833-FCI/MF implements a fully integrated linear charging architecture with an internal P-channel MOSFET pass transistor (RDS(ON) = 300 mΩ), precision reference generator (1.21 V), and dual-stage comparator-based control loop for preconditioning, fast charge, and constant-voltage regulation. Its thermal regulation dynamically scales charge current above 105°C to prevent die overheating while maintaining reliability.
It supports factory-set voltage regulation options (4.20 V, 4.35 V, 4.40 V, or 4.50 V), programmable preconditioning (10–100% of IREG), termination (5–25% of IREG), and automatic recharge (94–96.5% of VREG) - all ratiometrically tied to the PROG-set fast-charge current, enabling flexible adaptation to diverse cell chemistries and safety requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Regulation | 4.20 V ±0.75% - factory-trimmed reference ensures accurate full-charge cutoff for standard Li-ion cells without external feedback. |
| Max Charge Current | 1000 mA - set by 1.0 kΩ PROG-to-VSS resistor; enables rapid charging of 1000–2000 mAh batteries in portable devices. |
| Thermal Regulation | Active above 105°C - reduces ICHARGE to maintain safe junction temperature, eliminating need for external thermal foldback circuitry. |
| Preconditioning Threshold | 66.5% of VREG - triggers trickle charge at ~2.8 V for deeply depleted cells, preventing lithium plating damage. |
| Charge Termination Ratio | 5% of IREG - ends fast charge when current drops to 50 mA (at 1 A setting), ensuring full saturation without overcharge. |
| UVLO Threshold | 3.55 V (typical) with 100 mV hysteresis - prevents operation below safe input voltage and avoids battery discharge during brownout. |
| Package | DFN-10 (3 mm × 3 mm) - ultra-compact footprint with exposed thermal pad (EP) connected to VSS for enhanced heat dissipation in space-constrained PCBs. |
Pinout & Package
DFN-10 (3 mm × 3 mm) package with exposed thermal pad (EP) electrically tied to VSS; requires solder connection to ground plane for thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 1,2) | Battery management input supply | Accepts 3.75–6 V input; powers internal circuitry and enables UVLO monitoring; bypassed to VSS with ≥1 µF capacitor. |
| STAT1, STAT2 (Pins 3,4) | Open-drain charge status outputs | Drive LEDs or microcontroller GPIOs: STAT1 = low during charge, STAT2 = low at end-of-charge; Hi-Z otherwise. |
| VSS (Pin 5) | 0 V reference | Common return for battery negative, input supply, PROG resistor, and EP; must be low-impedance ground plane connection. |
| PROG (Pin 6) | Current regulation set and enable | Resistor to VSS sets fast charge current (IREG = 1000 V/RPROG); floating disables charger and limits reverse discharge to <2 µA. |
| PG (Pin 7) | Power good indication | Pseudo open-drain output pulled low when VDD > UVLO threshold and VDD > VBAT; must be pulled up only to VDD. |
| THERM (Pin 8) | Thermistor input | 50 µA bias current for NTC/PTC thermistors; compares THERM voltage to 1.23 V / 0.25 V thresholds to suspend charge on overtemp/undertemp. |
| VBAT (Pins 9,10) | Battery charge control output | Drain of internal P-MOSFET; connects directly to battery positive; bypassed to VSS with ≥4.7 µF ceramic capacitor for stability at >250 mA. |
| EP (Pin 11) | Exposed thermal pad | Internally connected to VSS; must be soldered to PCB ground pour to achieve θJA = 41°C/W and sustain 1 A continuous operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated pass transistor | Eliminates external MOSFET and gate driver, reducing BOM count and layout area in USB-powered chargers. |
| Programmable preconditioning | Configurable 10–100% IREG trickle charge ensures safe recovery of cells discharged below 2.5 V without firmware intervention. |
| Two independent status outputs | STAT1 and STAT2 provide unambiguous state machine signaling (charging vs. complete) without requiring microcontroller polling or timing logic. |
| System test (LDO) mode | Enables VBAT output regulation at VREG (e.g., 4.20 V) with PROG-set current limit - allows system power-up and validation without battery present. |
| Reverse discharge protection | Blocks battery-to-input leakage (<2 µA) when VDD is absent, preserving battery life in always-connected portable devices. |
Applications
| USB-Powered Portable Charger | Bluetooth Headset Battery Management |
|---|---|
Use Scenario: Charging single-cell Li-ion battery from 5 V USB port in compact wearable device with no host MCU. IC Role / Device Role / Timing Role: Stand-alone linear charger managing full CC/CV profile, thermal foldback, and end-of-charge detection autonomously. Use Value: Enables certified USB compliance (≤100 mA pre-enumeration, ≤500 mA post-enumeration) and eliminates need for software-controlled charging firmware. | Use Scenario: Integrated battery charging in Bluetooth headset with thermistor-based temperature monitoring and automatic recharge. IC Role / Device Role / Timing Role: Primary charge controller executing preconditioning, fast charge, CV regulation, and temperature-fault suspension per JEITA guidelines. Use Value: Prevents thermal runaway during high-ambient charging and extends cycle life via precise 4.20 V ±0.75% cutoff voltage. |
| Digital Camera Power System | MP3 Player Battery Interface |
Use Scenario: Fast-charging 1200 mAh Li-polymer battery in digital camera with mechanical battery door detection. IC Role / Device Role / Timing Role: Charge manager interfacing with door-open switch (via PROG enable) and driving dual-color LED via STAT1/STAT2 for user status feedback. Use Value: Reduces bill-of-materials by integrating current sense, reverse blocking, and status logic - shrinking PCB area by >30% vs. discrete solution. | Use Scenario: Low-power charging subsystem in MP3 player where standby current and battery self-discharge minimization are critical. IC Role / Device Role / Timing Role: Ultra-low-quiescent charger entering 50 µA standby when PROG floats and VDD drops below UVLO. Use Value: Extends shelf life to >12 months by limiting reverse discharge to <0.25 µA and disabling all internal circuits when not charging. |
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 | Fixed 4.2 V regulation, no selectable voltage option; 1.5 A max current; integrated LDO for system power. | Lacks programmable VREG variants and preconditioning ratio selection; better suited for fixed-chemistry, higher-current systems with auxiliary rail needs. | Select BQ24075RGTR when requiring integrated 3.3 V LDO output and higher charge current, but accept loss of voltage option flexibility. |
| TP4056 | Fixed 4.2 V regulation; no thermistor interface; no PG output; 1 A max current; no UVLO hysteresis spec. | Minimal feature set - suitable only for cost-sensitive, non-temperature-monitored applications without safety certification requirements. | Choose TP4056 only for basic charging in non-safety-critical consumer goods where thermistor monitoring and precise UVLO are unnecessary. |
Compared with BQ24075RGTR and TP4056, the MCP73833-FCI/MF offers unique factory-selectable regulation voltages (4.20/4.35/4.40/4.50 V), configurable preconditioning and termination ratios, and robust thermistor-based temperature qualification - making it optimal for next-generation Li-ion cells requiring tighter voltage tolerance and JEITA-compliant thermal management.
Availability
MCP73833-FCI/MF is available at Aetrix Electronics and suitable for USB chargers, Bluetooth headsets, digital cameras, and MP3 players requiring stable component supply, long-term lifecycle support, and automotive-grade reliability across -40°C to +85°C ambient conditions.
Supply support for MCP73833-FCI/MF 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 leading provider of microcontrollers, analog components, and battery management ICs, serving industrial, automotive, and consumer markets with high-reliability silicon and comprehensive design support.
The MCP73833/4 product line was designed specifically for space-constrained, cost-sensitive portable electronics requiring autonomous, USB-compliant Li-ion charging with integrated safety features and minimal external components.
FAQ
What is the factory-set voltage regulation for MCP73833-FCI/MF?
The MCP73833-FCI/MF is factory-configured for 4.20 V ±0.75% constant-voltage regulation, optimized for standard single-cell Li-ion batteries. This value is laser-trimmed during production and cannot be altered externally - other variants (e.g., MCP73833-2CI/MF) offer 4.35 V, 4.40 V, or 4.50 V options.
How does the PROG pin function in MCP73833-FCI/MF?
The PROG pin in MCP73833-FCI/MF serves dual roles: (1) setting fast-charge current via resistor to VSS (IREG = 1000 V/RPROG), and (2) acting as hardware enable - floating PROG disables charging and limits reverse discharge to <2 µA. It does not support dynamic current adjustment during operation.
Can MCP73833-FCI/MF operate without a thermistor?
Yes - MCP73833-FCI/MF operates without a thermistor. To disable temperature monitoring, connect a 10 kΩ resistor from THERM to VSS. The device then skips thermistor-based fault checks and proceeds with normal charging, retaining all other protections including UVLO, timer fault, and thermal regulation.
What is the purpose of the PG pin on MCP73833-FCI/MF?
The PG (Power Good) pin on MCP73833-FCI/MF is a pseudo open-drain output that sinks current when VDD exceeds the UVLO threshold (≥3.55 V) and remains above VBAT. It must be pulled up only to VDD - not to another voltage rail - due to its internal diode path, ensuring reliable input presence detection in USB-powered designs.
Does MCP73833-FCI/MF support automatic recharge, and how is it configured?
Yes, MCP73833-FCI/MF supports automatic recharge with a factory-set threshold of 94.0% of VREG (≈3.95 V at 4.20 V setting). When battery voltage drops below this level in Charge Complete mode, the device restarts the full CC/CV cycle. No external components or configuration are required - the behavior is fixed and active by default.
MCP73833-FCI/MF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Current
- Fault Protection:
- Over Temperature
- Charge Current - Max:
- 1.1A
- Battery Pack Voltage:
- 4.2V
- Voltage - Supply (Max):
- 6V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
MCP73833-FCI/MF FAQ
1.How can I place an order for MCP73833-FCI/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP73833-FCI/MF 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 MCP73833-FCI/MF reliable?
The price and inventory of MCP73833-FCI/MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP73833-FCI/MF is usually 5 days.
3.What payment methods are accepted for MCP73833-FCI/MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73833-FCI/MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP73833-FCI/MF?
MCP73833-FCI/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP73833-FCI/MF 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 MCP73833-FCI/MF?
For technical support, including MCP73833-FCI/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73833-FCI/MF requirements.
6.How does Aetrix verify that MCP73833-FCI/MF is sourced from the original manufacturer or authorized distributors?
All MCP73833-FCI/MF 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 MCP73833-FCI/MF meets industry standards.
7.What is the process for return or replacement of MCP73833-FCI/MF?
All MCP73833-FCI/MF units undergo pre-shipment inspection (PSI). If there is an issue with MCP73833-FCI/MF, 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 MCP73833-FCI/MF part is unused and in its original packaging.
Return procedure for MCP73833-FCI/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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