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Microchip Technology MCP73832T-3ACI/MC
- Part No.:
- MCP73832T-3ACI/MC
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
MCP73832T-3ACI/MC.pdf
- Description:
- IC BATT CONTRL LI-ION 1CELL 8DFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MCP73832T-3ACI/MC from Microchip Technology is a miniature, fully integrated linear lithium-ion/polymer battery charge management controller in an 8-lead 2 mm × 3 mm DFN package with exposed thermal pad. It delivers precise 4.40 V ±0.75% constant-voltage regulation, programmable fast-charge current (15–500 mA via external PROG resistor), and open-drain STAT output for host microcontroller interface - optimized for USB-powered portable devices requiring compact, low-BOM charging solutions.
For engineers reviewing the MCP73832T-3ACI/MC datasheet, MCP73832T-3ACI/MC pinout, MCP73832T-3ACI/MC application, or MCP73832T-3ACI/MC equivalent, this page provides verified technical context, exact pin functions, real-world application mappings, and validated alternative options for space-constrained Li-ion charging designs.
Technical Context
The MCP73832T-3ACI/MC implements a three-stage linear charge algorithm: preconditioning (trickle charge at 10%/20%/40% of IREG or disabled), constant-current fast charge, and constant-voltage regulation at factory-set 4.40 V. It integrates a P-channel MOSFET pass transistor (RDS(on) = 350 mΩ max at TJ = 105°C) and internal current sense, eliminating external sense resistors.
Thermal regulation dynamically reduces charge current above ~105°C to prevent overheating, while undervoltage lockout (UVLO) enforces 3.3–3.6 V startup with 70 mV hysteresis. Battery detection uses 6 µA VBAT sourcing; reverse discharge protection limits leakage to ≤2 µA when VDD is absent or floating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Regulation | 4.40 V ±0.75% - factory-trimmed reference ensures accurate full-charge termination for Li-ion cells without external feedback components. |
| Charge Current Range | 15 mA to 500 mA - set by single external PROG resistor (2–67 kΩ); enables design flexibility across battery capacities from 50 mAh to 1000 mAh. |
| Preconditioning Threshold | 66.5% of VREG (2.93 V typ.) - triggers trickle charge below battery voltage threshold to safely recover deeply discharged cells. |
| End-of-Charge Termination | 10% of IREG - terminates CV phase when average current drops to 10% of programmed fast-charge value, preventing overcharge. |
| Operating Temperature | −40°C to +85°C ambient - fully specified for industrial and consumer portable environments; thermal shutdown at 150°C (10°C hysteresis). |
| Package Thermal Resistance | θJA = 76°C/W - 2 mm × 3 mm DFN with exposed pad enables higher sustained charge currents vs. SOT-23-5 (θJA = 230°C/W). |
| Status Output Type | Open-drain STAT - compatible with microcontroller GPIO pull-up; sinks up to 25 mA; high-impedance during charge complete. |
Pinout & Package
Package: 8-lead, 2 mm × 3 mm DFN with exposed thermal pad (EP), RoHS-compliant, moisture sensitivity level 1 (MSL1).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Battery management input supply (3.75–6 V); bypass with ≥4.7 µF capacitor to VSS for stability. |
| 2 | VDD | Second VDD connection - must be tied to same input rail as Pin 1 for low-impedance power delivery. |
| 3 | VBAT | Battery charge control output - drain of internal P-MOSFET; connects to battery positive terminal; bypass with ≥4.7 µF to VSS. |
| 4 | VBAT | Second VBAT connection - ties directly to battery node; improves current handling and thermal path. |
| 5 | STAT | Open-drain charge status output - low during active charge; high-impedance at charge completion; requires external pull-up for MCU interface. |
| 6 | VSS | Battery and input supply ground reference - common return for all circuits; electrically connected to EP. |
| 7 | NC | No connection - internally unconnected; must remain floating or grounded per layout guidelines. |
| 8 | PROG | Current regulation set and enable input - resistor to VSS sets IREG; floating disables charger (IQ ≤ 50 µA). |
| EP | Exposed Thermal Pad | Internally connected to VSS - must be soldered to PCB copper pour with ≥4 thermal vias for optimal heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P-MOSFET pass transistor | Eliminates external FET and gate driver; RDS(on) ≤ 350 mΩ enables efficient 500 mA charging at 5 V input. |
| Four factory-set VREG options | 4.20 V / 4.35 V / 4.40 V / 4.50 V - supports evolving Li-ion chemistries including high-voltage LCO and NMC variants. |
| Selectable preconditioning & termination ratios | Configurable via part number suffix - MCP73832T-3ACI/MC uses 10% termination and 20% preconditioning (per DS20001984H Table 1-1). |
| Reverse discharge protection | Blocks battery-to-VDD current flow when input is absent; leakage < 2 µA preserves battery life in standby. |
| Automatic power-down | Enters ultra-low-quiescent mode (<50 µA) when VDD falls below UVLO or PROG floats - critical for USB suspend compliance. |
Applications
| USB-Powered Portable Devices | Wearable Health Monitors |
|---|---|
Use Scenario: Charging compact Bluetooth earbuds or smartwatches from standard 5 V USB ports with strict size and thermal constraints. IC Role / Device Role: Standalone linear charge controller managing full CC/CV profile, battery detection, and status signaling without MCU intervention. Use Value: Enables single-chip, zero-external-FET charging with 4.40 V regulation matching modern high-energy-density Li-polymer cells. |
Use Scenario: Recharging small-form-factor pulse oximeters or ECG patches using coin-cell-sized 3.7 V Li-ion batteries. IC Role / Device Role: Integrated battery management unit providing safe trickle-to-full charge, thermal foldback, and low-leakage sleep mode. Use Value: Delivers 15–100 mA programmable charge current and <2 µA reverse discharge to extend shelf life and field runtime. |
| Industrial Handheld Scanners | Smart Home Sensors |
Use Scenario: Powering ruggedized barcode scanners with removable 1000 mAh Li-ion packs charged via mini-USB. IC Role / Device Role: Primary charge management IC interfacing with host MCU via open-drain STAT for state reporting and fault indication. Use Value: Thermal regulation prevents derating in enclosed enclosures; 76°C/W θJA sustains >300 mA continuous charge under 50°C ambient. |
Use Scenario: Enabling multi-year battery life in battery-operated Zigbee/Thread motion or temperature sensors. IC Role / Device Role: Low-power charge supervisor enabling automatic recharge when battery voltage drops below 94% of VREG (4.14 V). Use Value: 25 µA shutdown current and automatic power-down on VDD removal minimize parasitic drain during storage or transport. |
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 |
|---|---|---|---|
| MCP73831T-3ACI/MC | Tri-state STAT output (not open-drain); identical VREG, PROG range, and thermal specs. | Requires pull-up resistor and logic-level interpretation for MCU interface; less flexible for shared-bus signaling. | Select when existing firmware expects three-state STAT or LED direct-drive capability. |
| BQ24075RGTR | TI device with 4.2 V fixed VREG, 100 mA default IREG, no programmable preconditioning; 16-pin QFN package. | Larger footprint, fewer configuration options; lacks 4.40 V option and adjustable termination ratio. | Choose only if 4.2 V regulation suffices and board area allows larger QFN; verify thermal performance at 500 mA. |
Compared with MCP73831T-3ACI/MC, the MCP73832T-3ACI/MC's open-drain STAT simplifies host MCU integration and reduces component count; versus BQ24075RGTR, it offers superior voltage option flexibility and smaller DFN packaging for ultra-compact designs.
Availability
MCP73832T-3ACI/MC is available at Aetrix Electronics and suitable for USB-powered portable devices, wearable health monitors, and industrial handheld scanners requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MCP73832T-3ACI/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 semiconductor products.
The MCP7383x family was designed specifically for cost-sensitive, space-constrained Li-ion/Li-polymer charging in portable electronics - emphasizing minimal external components, factory-trimmed accuracy, and robust thermal management without software overhead.
FAQ
What is the factory-set voltage regulation for MCP73832T-3ACI/MC?
The MCP73832T-3ACI/MC is factory-configured for 4.40 V ±0.75% constant-voltage regulation, as indicated by the "-3" suffix in its part number per Microchip's Product Identification System. This setting targets high-voltage Li-ion and Li-polymer cells requiring tighter termination precision than standard 4.20 V profiles.
How does the open-drain STAT output of MCP73832T-3ACI/MC differ from the tri-state output of MCP73831T-3ACI/MC?
The MCP73832T-3ACI/MC features an open-drain STAT output that pulls low during charging and goes high-impedance at charge completion - ideal for direct MCU GPIO interfacing with external pull-up. In contrast, the MCP73831T-3ACI/MC uses a tri-state output (high/low/high-Z), requiring additional logic or pull-up configuration for equivalent functionality.
What is the maximum recommended charge current for MCP73832T-3ACI/MC in its DFN package?
The MCP73832T-3ACI/MC supports up to 500 mA fast-charge current when configured with a 2.0 kΩ PROG resistor. However, sustained 500 mA operation requires adequate PCB copper area and thermal vias on the exposed pad, as junction temperature rise is governed by θJA = 76°C/W - exceeding 105°C triggers thermal regulation.
Does MCP73832T-3ACI/MC include battery detection and reverse discharge protection?
Yes, the MCP73832T-3ACI/MC incorporates active battery detection via 6 µA VBAT sourcing and automatically disables charging if VBAT exceeds VREG + 100 mV. It also provides reverse discharge protection, limiting leakage current to ≤2 µA when VDD is absent - preserving battery charge during system off-states.
Can MCP73832T-3ACI/MC be used in USB-compliant applications?
Yes, the MCP73832T-3ACI/MC adheres to USB power bus specifications: it operates from 4.75–5.25 V input, includes UVLO with hysteresis to prevent false starts, and draws <50 µA in shutdown - meeting USB suspend current requirements. Its 4.40 V VREG also aligns with newer USB PD-extended battery chemistries.
MCP73832T-3ACI/MC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- 4.35V
- Voltage - Supply (Max):
- 6V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x3)
MCP73832T-3ACI/MC FAQ
1.How can I place an order for MCP73832T-3ACI/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP73832T-3ACI/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 MCP73832T-3ACI/MC reliable?
The price and inventory of MCP73832T-3ACI/MC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP73832T-3ACI/MC is usually 5 days.
3.What payment methods are accepted for MCP73832T-3ACI/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73832T-3ACI/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP73832T-3ACI/MC?
MCP73832T-3ACI/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP73832T-3ACI/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 MCP73832T-3ACI/MC?
For technical support, including MCP73832T-3ACI/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73832T-3ACI/MC requirements.
6.How does Aetrix verify that MCP73832T-3ACI/MC is sourced from the original manufacturer or authorized distributors?
All MCP73832T-3ACI/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 MCP73832T-3ACI/MC meets industry standards.
7.What is the process for return or replacement of MCP73832T-3ACI/MC?
All MCP73832T-3ACI/MC units undergo pre-shipment inspection (PSI). If there is an issue with MCP73832T-3ACI/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 MCP73832T-3ACI/MC part is unused and in its original packaging.
Return procedure for MCP73832T-3ACI/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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