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Microchip Technology MCP73832-4ADI/MC
- Part No.:
- MCP73832-4ADI/MC
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
MCP73832-4ADI/MC.pdf
- Description:
- IC BATT CONTRL LI-ION 1CELL 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:400
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Product details
Overview
MCP73832-4ADI/MC from Microchip Technology is a 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 4.50 V ±0.75% constant-voltage regulation, programmable fast-charge current up to 500 mA via external PROG resistor, and open-drain STAT output for host microcontroller interface - deployed in USB-powered portable devices requiring compact, cost-effective, single-cell charging.
For engineers reviewing the MCP73832-4ADI/MC datasheet, MCP73832-4ADI/MC pinout, MCP73832-4ADI/MC application, or MCP73832-4ADI/MC equivalent, key selection criteria include its factory-set 4.50 V regulation voltage, thermal regulation behavior above 125°C, open-drain STAT signaling (vs. tri-state on MCP73831), and DFN package's 76°C/W junction-to-ambient thermal resistance under natural convection.
Technical Context
The MCP73832-4ADI/MC implements a three-phase linear charging algorithm: preconditioning (trickle charge at 10%/20%/40% of IREG or disabled), constant-current fast charge, and constant-voltage regulation at 4.50 V. Its internal P-channel MOSFET pass transistor features 350 mΩ typical RDS(ON) at 105°C, and battery detection uses 6 µA VBAT sourcing with no-battery threshold at VREG + 100 mV.
Undervoltage lockout (UVLO) activates below 3.3–3.6 V with 70 mV hysteresis; automatic power-down engages when VDD falls within 20–50 mV of VBAT; thermal shutdown triggers at 150°C with 10°C hysteresis. Charge termination occurs when average current drops to 5%/7.5%/10%/20% of IREG, filtered by a 0.4–3.2 ms comparator.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulated Voltage | 4.50 V ±0.75% - factory-trimmed for high-accuracy Li-ion/Li-polymer cell termination, supporting emerging higher-voltage chemistries. |
| Charge Current Range | 15–500 mA - set by single external PROG resistor (2–67 kΩ); enables precise adaptation to battery capacity (e.g., 1C for 500 mAh cell). |
| Precondition Threshold | 66.5–69% of VREG - ensures safe trickle charge for deeply discharged cells before fast-charge initiation. |
| Termination Ratio | 5% of IREG - low-ratio cutoff minimizes overcharge risk while maintaining full capacity utilization in stable thermal conditions. |
| Thermal Resistance θJA | 76°C/W - measured on 4-layer JC51-7 board with natural convection; enables sustained 500 mA charge without thermal foldback in optimized layouts. |
| STAT Output Type | Open-drain - allows direct connection to microcontroller GPIO with external pull-up; supports multi-LED status indication or interrupt signaling. |
| Operating Temp Range | −40°C to +85°C ambient - fully specified across industrial temperature range, with junction limit up to +125°C. |
Pinout & Package
Package: 8-lead 2 mm × 3 mm DFN with exposed thermal pad (EP), pin-compatible with MCP73831/2 family. EP must be soldered to VSS-connected copper pour for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 (VDD) | Battery management input supply | Dual VDD pins reduce trace inductance; accepts 3.75–6 V input; requires ≥4.7 µF bypass to VSS. |
| 3, 4 (VBAT) | Battery charge control output | Drain of internal P-MOSFET; connects directly to battery anode; requires ≥4.7 µF output capacitor for loop stability. |
| 5 (STAT) | Charge status output | Open-drain signal - pulls low during active charge (precondition, CC, CV); high-impedance at charge completion. |
| 6 (VSS) | Battery management 0V reference | Common ground for battery cathode, input supply return, and PROG resistor; internally tied to EP. |
| 8 (PROG) | Current regulation set & enable | Resistor-to-VSS sets IREG; floating disables device (IQ ≤ 25 µA); also controls precondition/termination ratios. |
| 9 (EP) | Exposed thermal pad | Electrically connected to VSS; mandatory PCB thermal vias required to inner ground plane for θJA = 76°C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated pass transistor | P-channel MOSFET with 350 mΩ RDS(ON) at 105°C eliminates external FET and reduces BOM count and layout area. |
| Reverse discharge protection | Sub-2 µA battery reverse leakage when VDD absent - prevents battery drain during system standby or input removal. |
| Thermal regulation | Automatic current reduction above ~125°C junction - maintains safe operation without external thermal sensors or shutdown. |
| Four voltage options | Factory-configured 4.50 V regulation - matches high-capacity Li-ion cells requiring >4.35 V termination for full energy density. |
| Programmable preconditioning | Selectable 10%/20%/40% or disable - avoids lithium plating on cold or deeply discharged cells while minimizing start-up delay. |
Applications
| USB-Powered Portable Devices | Wearable Health Monitors |
|---|---|
|
Use Scenario: Compact Bluetooth earbuds powered exclusively via micro-USB port with tight PCB space constraints. IC Role / Device Role / Timing Role: Standalone linear charger managing single-cell Li-polymer battery; regulates voltage to 4.50 V and current up to 250 mA using 4.7 kΩ PROG resistor. Use Value: Eliminates need for external current-sense resistor or discrete MOSFET; open-drain STAT interfaces directly to SoC GPIO for firmware-controlled charge state reporting. |
Use Scenario: Skin-contact ECG patch with ultra-low-profile battery and no user-accessible charging port. IC Role / Device Role / Timing Role: Primary charge controller enabling maintenance-free operation; uses 4.50 V regulation to maximize usable battery capacity from thin-film Li-ion cell. Use Value: Thermal regulation prevents skin-temperature rise during charging; reverse discharge protection extends shelf life when device shipped with partial charge. |
| Industrial Handheld Scanners | Smart Home Sensors |
|
Use Scenario: Rugged barcode scanner used in warehouse environments with frequent hot-plug USB charging cycles. IC Role / Device Role / Timing Role: Robust charging interface handling repeated VDD transients; UVLO hysteresis prevents oscillation during marginal USB voltage conditions. Use Value: 76°C/W thermal resistance sustains 400 mA charge even in enclosed plastic housing; DFN package withstands mechanical shock better than SOT-23. |
Use Scenario: Battery-powered CO₂ sensor node operating unattended for 2+ years on single charge. IC Role / Device Role / Timing Role: Low-quiescent charger enabling "always-on" battery monitoring; automatic recharge triggers at 94–99% of VREG to prevent deep discharge. Use Value: 25 µA shutdown current preserves battery during long idle periods; no-battery detection (≥7 MΩ impedance) avoids false triggers from sensor parasitics. |
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 |
|---|---|---|---|
| MCP73831-4ADI/MC | Tri-state STAT output (not open-drain); identical 4.50 V regulation, PROG programming, and thermal specs. | Requires external pull-up for microcontroller interfacing; less flexible for shared GPIO lines or multi-LED status. | Choose when legacy design uses tri-state logic or when STAT must drive LED directly without pull-up. |
| BQ24075RGTR | 4.20 V fixed regulation; 1.5 A max charge current; integrated LDO; different pinout and PROG scaling (1000 V/RPROG). | Higher current capability but lacks 4.50 V option; no preconditioning selectability; requires different PCB layout and firmware logic. | Choose only if 4.20 V is acceptable and >500 mA current or integrated LDO functionality is required. |
Compared with MCP73831-4ADI/MC, the MCP73832-4ADI/MC offers superior microcontroller integration via open-drain STAT, while BQ24075RGTR trades voltage flexibility for higher current and integrated power rails - making MCP73832-4ADI/MC optimal for space-constrained 4.50 V Li-ion systems needing clean host signaling.
Availability
MCP73832-4ADI/MC is available at Aetrix Electronics and suitable for USB chargers, wearable medical devices, and industrial handheld scanners requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MCP73832-4ADI/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 components, and battery management ICs, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.
The MCP73831/2 product line was designed specifically for cost-sensitive, space-limited portable electronics requiring fully integrated, single-cell Li-ion/Li-polymer charging with minimal external components and robust thermal management.
FAQ
What is the factory-set regulation voltage for MCP73832-4ADI/MC?
The MCP73832-4ADI/MC is factory-configured for 4.50 V ±0.75% constant-voltage regulation, optimized for high-energy-density lithium-ion and lithium-polymer cells requiring elevated termination voltages beyond standard 4.20 V. This value is laser-trimmed and non-adjustable in-circuit.
How does the STAT pin on MCP73832-4ADI/MC differ from MCP73831 variants?
The STAT pin on MCP73832-4ADI/MC is an open-drain output, whereas MCP73831 variants use a tri-state logic output. This means MCP73832-4ADI/MC requires an external pull-up resistor for high-level signaling and supports wired-OR configurations or direct GPIO interrupt triggering - unlike MCP73831 which can actively drive high.
Can MCP73832-4ADI/MC charge batteries without a microcontroller present?
Yes, MCP73832-4ADI/MC operates fully autonomously as a standalone charger. It executes the complete CC/CV algorithm - including preconditioning, fast charge, termination, and automatic recharge - without any host intervention. The STAT pin provides status feedback, but no firmware or external control is required for basic operation.
What thermal performance can be expected from MCP73832-4ADI/MC in its DFN package?
In its 2 mm × 3 mm DFN package with exposed thermal pad properly connected to PCB ground plane, MCP73832-4ADI/MC achieves θJA = 76°C/W under natural convection on a 4-layer board. At 500 mA charge current and 5.2 V input, this enables continuous operation without thermal shutdown in typical handheld enclosures.
Is the PROG pin on MCP73832-4ADI/MC used only for current setting?
No - the PROG pin on MCP73832-4ADI/MC serves dual functions: it sets fast-charge current via resistor-to-VSS, and acts as a hardware enable/disable control. Floating PROG disables the device (IQ ≤ 25 µA), making it a simple method for system-level charge control or battery removal detection.
MCP73832-4ADI/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:
- 4.4V
- Voltage - Supply (Max):
- 6V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x3)
MCP73832-4ADI/MC FAQ
1.How can I place an order for MCP73832-4ADI/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP73832-4ADI/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 MCP73832-4ADI/MC reliable?
The price and inventory of MCP73832-4ADI/MC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP73832-4ADI/MC is usually 5 days.
3.What payment methods are accepted for MCP73832-4ADI/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73832-4ADI/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP73832-4ADI/MC?
MCP73832-4ADI/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP73832-4ADI/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 MCP73832-4ADI/MC?
For technical support, including MCP73832-4ADI/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73832-4ADI/MC requirements.
6.How does Aetrix verify that MCP73832-4ADI/MC is sourced from the original manufacturer or authorized distributors?
All MCP73832-4ADI/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 MCP73832-4ADI/MC meets industry standards.
7.What is the process for return or replacement of MCP73832-4ADI/MC?
All MCP73832-4ADI/MC units undergo pre-shipment inspection (PSI). If there is an issue with MCP73832-4ADI/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 MCP73832-4ADI/MC part is unused and in its original packaging.
Return procedure for MCP73832-4ADI/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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