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Microchip Technology MCP73832-5ACI/MC
- Part No.:
- MCP73832-5ACI/MC
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
MCP73832-5ACI/MC.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,257
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Product details
Overview
MCP73832-5ACI/MC from Microchip Technology is a miniature linear lithium-ion/polymer battery charge management controller in an 8-lead 2 mm × 3 mm DFN package with exposed thermal pad. It delivers ±0.75% voltage regulation at 4.50 V, supports programmable charge current up to 500 mA via external resistor, features open-drain STAT output, and operates across –40°C to +85°C for USB-powered portable devices.
For engineers reviewing the MCP73832-5ACI/MC datasheet, MCP73832-5ACI/MC pinout, MCP73832-5ACI/MC application, or MCP73832-5ACI/MC equivalent, key selection criteria include its factory-set 4.50 V regulation, thermal regulation behavior, preconditioning/termination ratio options, and open-drain STAT interface compatibility with microcontroller GPIOs or LED drivers.
Technical Context
The MCP73832-5ACI/MC implements a constant-current/constant-voltage (CC/CV) charging algorithm with factory-configured 4.50 V regulation, 5% end-of-charge termination threshold, and 10% preconditioning current ratio. Its internal P-channel MOSFET pass transistor provides integrated current sensing and reverse discharge protection, eliminating external sense resistors and diodes.
Thermal regulation dynamically reduces charge current above ~105°C junction temperature to prevent overheating, while undervoltage lockout (UVLO) with 70 mV hysteresis ensures operation only when VDD exceeds 3.45 V and remains ≥150 mV above VBAT. Battery detection uses a 6 µA VBAT source current with no-battery threshold at VREG + 100 mV.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Regulation | 4.50 V ±0.75% - precisely matches high-voltage Li-ion and Li-polymer cells requiring tighter tolerance than standard 4.20 V. |
| Charge Current Range | 15–500 mA - set by single external PROG resistor (2–67 kΩ); enables optimization for 100–1000 mAh battery capacities. |
| End-of-Charge Threshold | 5% of IREG - terminates fast charge when average current drops to 5% of programmed value, ensuring full saturation without overcharge. |
| Preconditioning Ratio | 10% of IREG - applies safe trickle charge below 66.5% of VREG (≈2.99 V for 4.50 V part) to recover deeply discharged cells. |
| STAT Output Type | Open-drain - allows direct connection to MCU interrupt pins or pull-up LED circuits without level-shifting or additional transistors. |
| Thermal Regulation Threshold | Activates at ~105°C - begins linear current reduction before thermal shutdown at 150°C, preserving charge cycle continuity under sustained load. |
| Operating Temperature | –40°C to +85°C - fully specified ambient range supports industrial and automotive cabin-adjacent applications. |
Pinout & Package
Package: 8-Lead, 2 mm × 3 mm DFN with exposed thermal pad (EP), EP internally connected to VSS and must be soldered to PCB ground plane for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 1, 2) | Battery management input supply | Accepts 3.75–6 V input; bypassed with ≥4.7 µF capacitor; UVLO activates below 3.38 V. |
| VBAT (Pins 3, 4) | Battery charge control output | Drain of internal P-MOSFET; connects directly to battery positive; requires ≥4.7 µF output capacitance for stability. |
| STAT (Pin 5) | Charge status indicator | Open-drain output: LOW during active charge, high-impedance at charge completion - compatible with 3.3 V/5 V logic interfaces. |
| VSS (Pin 6) | Ground reference | Common return for VDD, VBAT, PROG, and EP; must connect to system ground and EP land. |
| NC (Pin 7) | No connection | Internally unconnected; leave floating or tie to ground per layout best practice - no electrical function. |
| PROG (Pin 8) | Current regulation and enable | Resistor-to-VSS sets IREG; floating disables device (IQ ≤ 25 µA); also serves as manual shutdown control. |
| EP (Pin 9) | Exposed thermal pad | Electrically tied to VSS; mandatory thermal path to inner ground layers via multiple vias - critical for >200 mA operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated pass transistor | Eliminates external MOSFET and gate driver, reducing BOM count and PCB area in space-constrained USB chargers. |
| Reverse discharge protection | Blocks battery-to-VDD current flow when input is absent, preventing standby power loss in portable systems. |
| Four factory voltage options | 4.50 V variant supports next-gen high-capacity Li-ion cells (e.g., NMC, LCO) requiring elevated termination voltages. |
| Automatic power-down | Reduces quiescent current to ≤25 µA when PROG floats or VDD falls below UVLO, extending host system battery life. |
| Thermal regulation with hysteresis | Gradually scales back charge current above 105°C and resumes at ~95°C, avoiding abrupt restarts that stress batteries. |
Applications
| USB-Powered Portable Chargers | Wearable Health Monitors |
|---|---|
Use Scenario: Compact wall adapters or power banks delivering regulated 5 V input to single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Linear charge controller managing CC/CV profile, STAT signaling, and thermal safety without host intervention. Use Value: Enables certified USB-IF compliant charging with minimal external components and no firmware dependency. | Use Scenario: Small-form-factor fitness trackers or ECG patches with tight volume constraints and low-power sleep modes. IC Role / Device Role / Timing Role: Autonomous battery manager providing preconditioning, precise 4.50 V regulation, and automatic recharge on voltage sag. Use Value: Extends runtime between charges via ultra-low quiescent current (<25 µA) and eliminates need for battery fuel gauging ICs. |
| Bluetooth Audio Accessories | Industrial Handheld Terminals |
Use Scenario: Wireless earbuds and neckbands recharged via USB-C or proprietary dock connectors. IC Role / Device Role / Timing Role: Charge status indicator (STAT) drives dual-color LEDs; integrated reverse discharge prevents battery drain during storage. Use Value: Supports rapid 500 mA charging while maintaining <2 µA reverse leakage, critical for shelf-life requirements. | Use Scenario: Ruggedized barcode scanners or field service tools operating in wide ambient temperatures. IC Role / Device Role / Timing Role: Robust battery supervisor handling cold-start (-40°C) and hot environments (+85°C) with guaranteed regulation accuracy. Use Value: Ensures reliable charge termination across temperature extremes, preventing capacity loss or thermal runaway. |
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 |
|---|---|---|---|
| MCP73831-5ACI/MC | Tri-state STAT output instead of open-drain; identical regulation, current range, and thermal behavior. | Requires pull-up for MCU interface; less flexible for LED-only status indication without external transistor. | Select when host MCU GPIO supports high-impedance readback or tri-state logic is required for multi-device bus sharing. |
| BQ24075RGTR | Higher max input voltage (6.5 V), integrated LDO for VBUS detection, but no factory-set 4.50 V option - requires external resistor network for 4.50 V. | Lacks native 4.50 V regulation; needs calibration for high-voltage cell support; larger 16-pin QFN package. | Choose when USB enumeration or power-path management is needed alongside charging, and board space permits larger footprint. |
Compared with MCP73831-5ACI/MC, the MCP73832-5ACI/MC offers simpler LED interfacing and lower component count; versus BQ24075RGTR, it delivers plug-and-play 4.50 V compliance with smaller size and lower cost, but lacks power-path control for simultaneous charge/system operation.
Availability
MCP73832-5ACI/MC is available at Aetrix Electronics and suitable for USB-powered portable chargers, wearable health monitors, Bluetooth audio accessories, and industrial handheld terminals requiring stable component supply and long-term lifecycle support.
Supply support for MCP73832-5ACI/MC 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, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.
The MCP7383x product line delivers highly integrated, cost-optimized linear battery chargers for space-constrained portable electronics - designed specifically for USB-compliant, single-cell Li-ion/Li-polymer applications with minimal external components.
FAQ
What is the factory-set voltage regulation for MCP73832-5ACI/MC?
The MCP73832-5ACI/MC is factory-configured for 4.50 V ±0.75% constant-voltage regulation, optimized for high-energy-density lithium-ion and lithium-polymer cells that require elevated termination voltages beyond the standard 4.20 V. This value is fixed and cannot be adjusted externally; other variants (e.g., -2, -3, -4) offer 4.20 V, 4.35 V, and 4.40 V respectively. The MCP73832-5ACI/MC maintains this accuracy across –40°C to +85°C ambient temperature.
How does the STAT pin on MCP73832-5ACI/MC behave during charging?
The STAT pin on MCP73832-5ACI/MC is an open-drain output: it actively pulls LOW during all active charge phases (preconditioning, constant-current, and constant-voltage modes), and enters high-impedance (Hi-Z) state upon charge completion. Unlike the tri-state STAT of MCP73831, this configuration allows direct connection to an LED with pull-up resistor or to a microcontroller GPIO configured as input with internal pull-up. The MCP73832-5ACI/MC does not drive HIGH - external circuitry defines the high-level voltage.
What is the maximum programmable charge current for MCP73832-5ACI/MC?
The MCP73832-5ACI/MC supports a maximum programmable charge current of 500 mA, achieved using a 2.0 kΩ resistor from PROG to VSS. This value is production-tested and guaranteed across temperature. At higher currents, thermal regulation engages above ~105°C junction temperature to protect the device, making heatsinking or DFN package thermal design essential. Lower currents (e.g., 100 mA with 10 kΩ) are also supported and retain full ±0.75% voltage accuracy. The MCP73832-5ACI/MC does not support currents above 500 mA.
Does MCP73832-5ACI/MC include battery detection and reverse discharge protection?
Yes, the MCP73832-5ACI/MC integrates both functions. It sources a 6 µA current from the VBAT pin to detect battery presence - if VBAT rises above VREG + 100 mV (≈4.60 V), it assumes no battery is connected. Reverse discharge protection blocks current flow from battery to VDD when input is absent, limiting leakage to ≤2 µA. These features eliminate the need for external FETs or comparators, reducing solution size and cost. The MCP73832-5ACI/MC performs both autonomously without host intervention.
What package and thermal characteristics apply to MCP73832-5ACI/MC?
The MCP73832-5ACI/MC is supplied in an 8-lead, 2 mm × 3 mm DFN package with exposed thermal pad (EP), where EP is internally connected to VSS. On a 4-layer JEDEC-standard board, its junction-to-ambient thermal resistance (θJA) is 76°C/W. Effective thermal performance requires soldering EP to a solid ground plane with ≥4 thermal vias. Without proper EP grounding, thermal regulation may activate prematurely at currents >200 mA. The MCP73832-5ACI/MC's thermal shutdown triggers at 150°C with 10°C hysteresis.
MCP73832-5ACI/MC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-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 Voltage
- Charge Current - Max:
- 500mA
- Battery Pack Voltage:
- 4.5V
- Voltage - Supply (Max):
- 6V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x3)
MCP73832-5ACI/MC FAQ
1.How can I place an order for MCP73832-5ACI/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP73832-5ACI/MC 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 MCP73832-5ACI/MC reliable?
The price and inventory of MCP73832-5ACI/MC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP73832-5ACI/MC is usually 5 days.
3.What payment methods are accepted for MCP73832-5ACI/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73832-5ACI/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP73832-5ACI/MC?
MCP73832-5ACI/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP73832-5ACI/MC 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 MCP73832-5ACI/MC?
For technical support, including MCP73832-5ACI/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73832-5ACI/MC requirements.
6.How does Aetrix verify that MCP73832-5ACI/MC is sourced from the original manufacturer or authorized distributors?
All MCP73832-5ACI/MC 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 MCP73832-5ACI/MC meets industry standards.
7.What is the process for return or replacement of MCP73832-5ACI/MC?
All MCP73832-5ACI/MC units undergo pre-shipment inspection (PSI). If there is an issue with MCP73832-5ACI/MC, 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 MCP73832-5ACI/MC part is unused and in its original packaging.
Return procedure for MCP73832-5ACI/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP73832-5ACI/MC Tags
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