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Microchip Technology MCP73832-2ATI/MC
- Part No.:
- MCP73832-2ATI/MC
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
MCP73832-2ATI/MC.pdf
- Description:
- IC BATT CONTRL LI-ION 1CELL 8DFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MCP73832-2ATI/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 precise 4.20 V ±0.75% constant-voltage regulation, programmable fast-charge current (15–500 mA via PROG resistor), and open-drain STAT output for host microcontroller interface. It supports USB-compliant charging, thermal regulation, and automatic recharge in portable power systems.
For engineers reviewing the MCP73832-2ATI/MC datasheet, MCP73832-2ATI/MC pinout, MCP73832-2ATI/MC application, or MCP73832-2ATI/MC equivalent, key selection considerations include its factory-set 4.20 V regulation voltage, open-drain STAT signaling (vs. tri-state on MCP73831), DFN thermal performance (θJA = 76°C/W), and preconditioning/termination ratio options tied to PROG resistor value.
Technical Context
The MCP73832-2ATI/MC implements a three-phase linear charging algorithm: preconditioning (trickle charge at 10%/20%/40% of IREG), constant-current fast charge, and constant-voltage regulation. Its internal P-channel MOSFET pass transistor features 350 mΩ typical RDS(ON) at 105°C, and thermal regulation actively reduces charge current above ~115°C to prevent die overheating.
Undervoltage lockout (UVLO) activates below 3.3–3.6 V with 70 mV hysteresis, and battery detection uses a 6 µA VBAT current source to distinguish no-battery (VBAT ≥ VREG + 100 mV) from valid cell presence. The PROG pin serves dual roles: setting IREG via external resistor (2–67 kΩ) and enabling/disabling charge when floated (>70 kΩ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulated Voltage | 4.20 V ±0.75% - Factory-trimmed reference for Li-ion cell full-charge termination; enables compliance with JEITA and battery manufacturer specs. |
| Charge Current Range | 15–500 mA - Set by single external PROG resistor (2–67 kΩ); supports 1C charging for up to 500 mAh cells. |
| Preconditioning Ratio | 10%, 20%, 40%, or disabled - Configured at manufacture; prevents damage to deeply discharged cells before fast charge. |
| End-of-Charge Threshold | 5%, 7.5%, 10%, or 20% of IREG - Determines termination sensitivity; higher ratios reduce overcharge risk in high-impedance battery systems. |
| STAT Output Type | Open-drain - Requires external pull-up for host MCU interrupt or LED drive; supports wired-OR logic and level translation. |
| Thermal Regulation Start | ~115°C junction - Dynamically scales back IREG to maintain safe die temperature without halting charge. |
| Operating Temp Range | −40°C to +85°C ambient - Fully specified across industrial temperature range; validated for embedded portable equipment. |
Pinout & Package
Package: 8-lead 2 mm × 3 mm DFN with exposed thermal pad (EP), RoHS-compliant, moisture-sensitive level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 1, 2) | Battery management input supply | Accepts 3.75–6 V input; bypass with ≥4.7 µF capacitor; UVLO disables device below 3.3 V. |
| VBAT (Pins 3, 4) | Battery charge control output | Drain of internal P-MOSFET; connects to Li-ion (+) terminal; requires ≥4.7 µF output cap for loop stability. |
| STAT (Pin 5) | Charge status indicator | Open-drain output - low during active charge, high-Z at completion; drives LED or MCU GPIO with pull-up. |
| VSS (Pin 6) | Ground reference | Common return for VDD, VBAT, PROG, and EP; must be low-impedance PCB plane. |
| NC (Pin 7) | No connection | Unbonded; leave unconnected and unpopulated on PCB. |
| PROG (Pin 8) | Current regulation set & enable | Resistor to VSS sets IREG; floating disables charge and reduces quiescent current to ≤25 µA. |
| EP (Bottom pad) | Exposed thermal pad | Internally connected to VSS; must be soldered to thermal copper plane with ≥4 vias for θJA = 76°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated pass transistor | Eliminates external MOSFET and gate driver; reduces BOM count and layout area in space-constrained designs. |
| Reverse discharge protection | Blocks battery-to-VDD current flow when input is absent; limits reverse leakage to ≤2 µA in shutdown. |
| Four factory-set VREG options | Supports evolving Li-ion chemistries (4.20 V, 4.35 V, 4.40 V, 4.50 V); MCP73832-2ATI/MC is fixed at 4.20 V. |
| Automatic power-down | Enters <25 µA sleep mode when VDD falls below UVLO or PROG floats; preserves battery energy in standby. |
| USB-compliant operation | Meets USB 2.0 port power specifications (≤100 mA pre-configuration, ≤500 mA configured) without external logic. |
Applications
| USB-Powered Portable Devices | Wearable Health Monitors |
|---|---|
|
Use Scenario: Charging compact devices like Bluetooth earbuds or smartwatches directly from USB ports or wall adapters. IC Role / Device Role / Timing Role: Standalone linear charger managing full CC/CV profile, battery detection, and STAT signaling without host intervention. Use Value: Enables single-chip USB-compliant charging with minimal external components (only PROG resistor and two 4.7 µF caps), reducing PCB footprint and cost. |
Use Scenario: Recharging small-capacity Li-polymer batteries (e.g., 100–300 mAh) in fitness trackers or ECG patches. IC Role / Device Role / Timing Role: Precision 4.20 V regulation ensures safe full-charge voltage for thin-profile polymer cells; thermal regulation prevents skin-temperature rise. Use Value: Delivers accurate end-of-charge detection and automatic recharge while maintaining <1 mm profile compatibility with flexible PCBs. |
| Industrial Handheld Terminals | Smart Home Sensors |
|
Use Scenario: Battery backup and primary charging in ruggedized barcode scanners or inventory tools operating across −40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-grade linear charger with guaranteed operation over full temperature range and robust UVLO/battery detection. Use Value: Eliminates need for external temperature compensation or discrete protection circuits; simplifies qualification for extended-temperature deployments. |
Use Scenario: Intermittent charging of coin-cell–sized Li-ion packs in battery-operated door/window sensors or air quality monitors. IC Role / Device Role / Timing Role: Low-quiescent-power charger with automatic recharge and no-battery detection to prevent false triggers during storage. Use Value: Reduces system standby current to <1 µA when battery is absent, extending shelf life and field deployment intervals. |
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 |
|---|---|---|---|
| MCP73831-2ATI/MC | Tri-state STAT output (not open-drain); identical VREG, PROG programming, and thermal behavior. | Requires pull-up for MCU interface; unsuitable where wired-OR or level-shifting is needed. | Select MCP73831-2ATI/MC only if tri-state signaling is required for multi-LED status indication. |
| BQ24075RGTR | TI part with 4.2 V regulation, but includes integrated LDO, dynamic power path management, and I2C control. | Supports simultaneous system load and battery charging; adds complexity and cost for simple standalone use. | Choose BQ24075RGTR only when system power-path control or host-configurable parameters are essential. |
Compared with MCP73831-2ATI/MC, the MCP73832-2ATI/MC's open-drain STAT simplifies host interfacing and enables direct connection to 3.3 V or 5 V MCUs without level shifters; versus BQ24075RGTR, it offers lower BOM cost and smaller footprint at the expense of programmability and power-path flexibility.
Availability
MCP73832-2ATI/MC is available at Aetrix Electronics and suitable for USB-powered portable devices, wearable health monitors, industrial handheld terminals, and smart home sensors requiring stable component supply and long-term industrial temperature support.
Supply support for MCP73832-2ATI/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, FPGA, and memory solutions, serving automotive, industrial, consumer, and communications markets with vertically integrated silicon and software.
The MCP73831/2 product line delivers miniature, cost-optimized linear charge controllers for space-constrained Li-ion/Li-polymer battery systems-designed specifically for USB-compliant, low-component-count portable electronics.
FAQ
What is the factory-set regulated voltage for MCP73832-2ATI/MC?
The MCP73832-2ATI/MC is factory-configured for 4.20 V ±0.75% constant-voltage regulation, optimized for standard single-cell lithium-ion batteries. This value is laser-trimmed and non-adjustable; other variants (e.g., MCP73832-3ATI/MC) offer 4.35 V, 4.40 V, or 4.50 V.
How does the STAT pin on MCP73832-2ATI/MC differ from MCP73831-2ATI/MC?
The MCP73832-2ATI/MC features an open-drain STAT output, requiring an external pull-up resistor for logic-high signaling, whereas the MCP73831-2ATI/MC provides a tri-state output (high/low/high-Z). This makes MCP73832-2ATI/MC better suited for interfacing with mixed-voltage MCUs or wired-OR status buses.
Can MCP73832-2ATI/MC be used without a battery connected?
Yes - the MCP73832-2ATI/MC includes battery detection circuitry that sources 6 µA from VBAT. If VBAT rises above VREG + 100 mV (≈4.3 V), the device enters no-battery state with <25 µA quiescent current and high-Z STAT, preventing reverse discharge and enabling safe unattended operation.
What thermal performance can be expected from MCP73832-2ATI/MC in its DFN package?
In the 2 mm × 3 mm DFN package with exposed thermal pad properly soldered to a 4-layer PCB using ≥4 thermal vias, the MCP73832-2ATI/MC achieves θJA = 76°C/W. At 500 mA charge current and 5 V input, this allows sustained operation up to ~60°C ambient before thermal regulation engages.
How is charge current programmed on MCP73832-2ATI/MC?
Charge current is set by a single resistor (RPROG) from PROG to VSS, calculated as IREG = 1000 / RPROG (with RPROG in kΩ and IREG in mA). Valid range is 2–67 kΩ, yielding 15–500 mA; values >70 kΩ disable charging entirely.
MCP73832-2ATI/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:
- 4.2V
- Voltage - Supply (Max):
- 6V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x3)
MCP73832-2ATI/MC FAQ
1.How can I place an order for MCP73832-2ATI/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP73832-2ATI/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 MCP73832-2ATI/MC reliable?
The price and inventory of MCP73832-2ATI/MC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP73832-2ATI/MC is usually 5 days.
3.What payment methods are accepted for MCP73832-2ATI/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73832-2ATI/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP73832-2ATI/MC?
MCP73832-2ATI/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP73832-2ATI/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 MCP73832-2ATI/MC?
For technical support, including MCP73832-2ATI/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73832-2ATI/MC requirements.
6.How does Aetrix verify that MCP73832-2ATI/MC is sourced from the original manufacturer or authorized distributors?
All MCP73832-2ATI/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 MCP73832-2ATI/MC meets industry standards.
7.What is the process for return or replacement of MCP73832-2ATI/MC?
All MCP73832-2ATI/MC units undergo pre-shipment inspection (PSI). If there is an issue with MCP73832-2ATI/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 MCP73832-2ATI/MC part is unused and in its original packaging.
Return procedure for MCP73832-2ATI/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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