Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Battery Chargers

Microchip Technology MCP73832-2ACI/MC

Name: MCP73832-2ACI/MC
Brand: Microchip Technology
SKU: MCP73832-2ACI/MC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: MCP73832-2ACI/MC

Manufacturer:: Microchip Technology

Category:: Battery Chargers

Package:: 8-VFDFN Exposed Pad

Datasheet:: MCP73832-2ACI/MC.pdf

Description:: IC BATT CONTRL LI-ION 1CELL 8DFN

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,870

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

MCP73832-2ACI/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 15–500 mA fast-charge current via single PROG resistor, and open-drain STAT output for host microcontroller interface - designed for USB-powered portable devices requiring compact, low-component-count charging solutions.

For engineers reviewing the MCP73832-2ACI/MC datasheet, MCP73832-2ACI/MC pinout, MCP73832-2ACI/MC application, or MCP73832-2ACI/MC equivalent, key selection criteria include its factory-set 4.20 V regulation voltage, open-drain STAT behavior (vs. tri-state on MCP73831), thermal regulation down to 76°C/W θ_JA, -40°C to +85°C operating range, and compatibility with Li-ion cells up to 500 mA charge rate.

Technical Context

The MCP73832-2ACI/MC implements a three-phase linear charging algorithm: preconditioning (trickle charge at 10%/20%/40% of I_REG or disabled), constant-current fast charge, and constant-voltage regulation. Its internal P-channel MOSFET pass transistor features 350 mΩ typical R_DS(ON) at 105°C, enabling efficient power delivery while supporting automatic thermal regulation that dynamically reduces charge current above ~105°C junction temperature.

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 presence/absence based on VBAT rising above V_REG + 100 mV. Charge termination occurs when average current falls below 5%/7.5%/10%/20% of programmed I_REG, filtered by a 1.3 ms comparator.

Key Specifications

Parameter	Value and Actual Design Meaning
Regulated Voltage	4.20 V ±0.75% - factory-trimmed reference ensures accurate full-charge cutoff for standard Li-ion cells without external feedback.
Charge Current Range	15–500 mA - set by single external resistor (R_PROG = 2–67 kΩ); enables optimization for 180–1000 mAh batteries.
STAT Output Type	Open-drain - requires external pull-up for host MCU interface; sinks up to 25 mA at 0.4 V, supports direct LED drive or logic-level signaling.
Thermal Regulation	Active at ~105°C junction - reduces I_CHARGE to prevent overheating during high-power operation; resumes full current after cooling ≥10°C.
Operating Temperature	-40°C to +85°C ambient - fully specified across industrial range; junction max 125°C, thermal shutdown at 150°C.
Package	8-lead 2 mm × 3 mm DFN with exposed thermal pad (EP) - EP electrically tied to VSS; achieves 76°C/W θ_JA on 4-layer board.
UVLO Threshold	3.3–3.6 V start / 3.2–3.5 V stop - prevents operation below safe input voltage; includes 70 mV hysteresis to avoid oscillation near threshold.

Pinout & Package

Package: 8-lead 2 mm × 3 mm DFN with exposed thermal pad (EP), RoHS-compliant, moisture-sensitive level 3.

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; triggers UVLO shutdown if <3.3 V.
VBAT (Pins 3, 4)	Battery charge control output	Drain of internal P-MOSFET; connects to battery positive; sources 6 µA for battery detection.
STAT (Pin 5)	Charge status indicator	Open-drain output - LOW during active charge, high-impedance at charge completion; requires external pull-up.
VSS (Pin 6)	0 V reference	System ground; ties internally to exposed thermal pad (EP); must be connected to PCB ground plane.
NC (Pin 7)	No connection	Unbonded die pad; must remain unconnected on PCB.
PROG (Pin 8)	Current regulation set	Connects to VSS via resistor to set I_REG; floating disables device (I_Q ≤ 25 µA).
EP (Pin 9)	Exposed thermal pad	Internally connected to VSS; requires soldered thermal vias to inner ground layers for optimal heat dissipation.

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 during UVLO or shutdown.
Selectable preconditioning	Configurable 10%/20%/40% trickle charge or disable - protects deeply discharged Li-ion cells before fast charging.
Programmable end-of-charge	Terminates charge at 5%/7.5%/10%/20% of I_REG - balances full capacity vs. cycle life for different cell chemistries.
Automatic power-down	Enters ultra-low-quiescent mode (<25 µA) when VDD drops below UVLO or PROG floats - preserves battery energy.

Applications

USB-Powered Portable Devices	Wearable Health Monitors
Use Scenario: Charging compact consumer electronics (e.g., Bluetooth headsets, MP3 players) directly from USB 2.0 ports limited to 500 mA. IC Role / Device Role / Timing Role: Linear charge controller managing CC/CV profile, battery detection, and status signaling via open-drain STAT. Use Value: Enables single-resistor current programming and USB-compliant 500 mA charging without external FET or complex sequencing logic.	Use Scenario: Recharging small-form-factor wearable sensors (e.g., pulse oximeters, ECG patches) with 100–300 mAh Li-polymer cells. IC Role / Device Role / Timing Role: Standalone charger providing thermal-regulated 100–300 mA fast charge and automatic recharge when battery voltage drops below 94% V_REG. Use Value: Maintains safe operating temperature in sealed enclosures using DFN thermal pad, while delivering full charge in <2.5 hours.
Industrial Handheld Terminals	Smart Home Sensors
Use Scenario: Powering ruggedized barcode scanners or RFID readers with replaceable Li-ion packs in field-deployed equipment. IC Role / Device Role / Timing Role: Primary charge manager handling undervoltage lockout, battery presence detection, and charge-complete signaling to host MCU. Use Value: Ensures reliable startup under cold (-40°C) conditions and prevents overvoltage damage via 6 V absolute max VDD rating.	Use Scenario: Enabling multi-year battery life in battery-operated Zigbee/Z-Wave sensors with periodic USB recharging. IC Role / Device Role / Timing Role: Low-quiescent charger with automatic power-down and no-battery-present detection to minimize standby drain. Use Value: Reduces system sleep current to <2 µA when no battery is attached, extending shelf life and reducing false wake-ups.

USB-Powered Portable Devices

Wearable Health Monitors

Use Scenario: Charging compact consumer electronics (e.g., Bluetooth headsets, MP3 players) directly from USB 2.0 ports limited to 500 mA.

IC Role / Device Role / Timing Role: Linear charge controller managing CC/CV profile, battery detection, and status signaling via open-drain STAT.

Use Value: Enables single-resistor current programming and USB-compliant 500 mA charging without external FET or complex sequencing logic.

Use Scenario: Recharging small-form-factor wearable sensors (e.g., pulse oximeters, ECG patches) with 100–300 mAh Li-polymer cells.

IC Role / Device Role / Timing Role: Standalone charger providing thermal-regulated 100–300 mA fast charge and automatic recharge when battery voltage drops below 94% V_REG.

Use Value: Maintains safe operating temperature in sealed enclosures using DFN thermal pad, while delivering full charge in <2.5 hours.

Industrial Handheld Terminals

Smart Home Sensors

Use Scenario: Powering ruggedized barcode scanners or RFID readers with replaceable Li-ion packs in field-deployed equipment.

IC Role / Device Role / Timing Role: Primary charge manager handling undervoltage lockout, battery presence detection, and charge-complete signaling to host MCU.

Use Value: Ensures reliable startup under cold (-40°C) conditions and prevents overvoltage damage via 6 V absolute max VDD rating.

Use Scenario: Enabling multi-year battery life in battery-operated Zigbee/Z-Wave sensors with periodic USB recharging.

IC Role / Device Role / Timing Role: Low-quiescent charger with automatic power-down and no-battery-present detection to minimize standby drain.

Use Value: Reduces system sleep current to <2 µA when no battery is attached, extending shelf life and reducing false wake-ups.

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
MCP73831-2ACI/MC	Tri-state STAT output (not open-drain); identical voltage/current specs and pinout except STAT functionality.	Requires pull-up resistor for MCU interface; cannot sink LED current without external driver.	Choose when host system needs three-state signaling or direct LED anode drive.
BQ24075RGTR	TI part with 4.2 V regulation, 500 mA max, but adds USB enumeration, INDET, and TS inputs; 16-pin QFN package.	Supports USB suspend/resume and thermal monitoring via external NTC; higher integration but larger footprint.	Choose when USB compliance beyond power delivery (e.g., D+/D- handshake) or thermal safety monitoring is required.

Compared with MCP73831-2ACI/MC, the MCP73832-2ACI/MC's open-drain STAT simplifies host MCU interfacing without pull-up conflicts, while BQ24075RGTR adds USB protocol awareness and thermal sensing at the cost of increased pin count and design complexity.

Availability

MCP73832-2ACI/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 production support.

Supply support for MCP73832-2ACI/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 mixed-signal semiconductors headquartered in Chandler, Arizona.

The MCP7383x family was engineered specifically for cost-sensitive, space-constrained Li-ion/Li-polymer charging in portable electronics - emphasizing minimal external components, thermal robustness, and USB power bus compliance.

FAQ

What is the exact regulated output voltage of the MCP73832-2ACI/MC?

The MCP73832-2ACI/MC is factory-configured for 4.20 V constant-voltage regulation with a tolerance of ±0.75%, meaning the actual V_REG falls between 4.168 V and 4.232 V at +25°C and remains stable across load, line, and temperature per datasheet specifications.

How does the STAT pin on the MCP73832-2ACI/MC behave during charging?

The STAT pin on the MCP73832-2ACI/MC is an open-drain output: it actively pulls LOW during preconditioning, constant-current, and constant-voltage charging phases, and enters high-impedance (Hi-Z) state upon charge completion - requiring an external pull-up resistor for proper logic-level or LED interface.

Can the MCP73832-2ACI/MC charge a battery without a host microcontroller?

Yes, the MCP73832-2ACI/MC operates fully autonomously as a stand-alone charger: it performs battery detection, preconditioning, CC/CV charging, termination, and automatic recharge without any host intervention - only requiring VDD, VBAT, PROG resistor, and bypass capacitors.

What thermal performance can be expected from the MCP73832-2ACI/MC in its DFN package?

In its 8-lead 2 mm × 3 mm DFN package with exposed thermal pad, the MCP73832-2ACI/MC achieves 76°C/W junction-to-ambient thermal resistance (θ_JA) on a 4-layer PCB - enabling sustained 500 mA charging at room temperature and initiating thermal regulation only when junction exceeds ~105°C.

Is the MCP73832-2ACI/MC compatible with lithium-polymer batteries?

Yes, the MCP73832-2ACI/MC is explicitly qualified for both lithium-ion and lithium-polymer battery chemistries, supporting the standard CC/CV charging algorithm, 4.20 V regulation, and automatic recharge thresholds appropriate for single-cell LiPo configurations.

MCP73832-2ACI/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)

MCP73832-2ACI/MC FAQ

1.How can I place an order for MCP73832-2ACI/MC through Aetrix?

Please submit a Request for Quotation (RFQ) for MCP73832-2ACI/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 MCP73832-2ACI/MC reliable?

The price and inventory of MCP73832-2ACI/MC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP73832-2ACI/MC is usually 5 days.

3.What payment methods are accepted for MCP73832-2ACI/MC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73832-2ACI/MC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MCP73832-2ACI/MC?

MCP73832-2ACI/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MCP73832-2ACI/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 MCP73832-2ACI/MC?

For technical support, including MCP73832-2ACI/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73832-2ACI/MC requirements.

6.How does Aetrix verify that MCP73832-2ACI/MC is sourced from the original manufacturer or authorized distributors?

All MCP73832-2ACI/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 MCP73832-2ACI/MC meets industry standards.

7.What is the process for return or replacement of MCP73832-2ACI/MC?

All MCP73832-2ACI/MC units undergo pre-shipment inspection (PSI). If there is an issue with MCP73832-2ACI/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 MCP73832-2ACI/MC part is unused and in its original packaging.

Return procedure for MCP73832-2ACI/MC:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…