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

Microchip Technology MCP73213-A21I/MF

Name: MCP73213-A21I/MF
Brand: Microchip Technology
SKU: MCP73213-A21I/MF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MCP73213-A21I/MF

Manufacturer:: Microchip Technology

Category:: Battery Chargers

Package:: 10-VFDFN Exposed Pad

Datasheet:: MCP73213-A21I/MF.pdf

Description:: IC BATT CHG LI-ION 2CELL 10DFN

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Product details

Overview

MCP73213-A21I/MF from Microchip Technology is a dual-cell Li-ion/Li-polymer linear battery charge management controller with integrated pass transistor, current sense, input overvoltage protection (13 V), and thermal regulation. It delivers 8.40 V regulated output voltage, supports 130–1100 mA resistor-programmable fast charge current, and operates across –40°C to +85°C for portable media players and ultra-mobile PCs.

For engineers reviewing the MCP73213-A21I/MF datasheet, MCP73213-A21I/MF pinout, MCP73213-A21I/MF application, or MCP73213-A21I/MF equivalent, this page provides verified technical context, factory-preset configuration details (8.40 V, 10% preconditioning, 32-min timer, 6-hr elapse timer, 10% end-of-charge threshold, 95% recharge threshold, Type 1 status output), and real-world design implications for space-constrained, cost-sensitive charging systems.

Technical Context

The MCP73213-A21I/MF implements a full CC/CV charge algorithm optimized for 2-cell Li-ion/Li-polymer batteries, with factory-preset 8.40 V regulation and ±0.6% accuracy over –5°C to +55°C. Its internal P-channel MOSFET (350 mΩ R_DS(on)) enables direct linear charging without external power switches.

Thermal regulation dynamically reduces charge current above ~105°C die temperature, while thermal shutdown suspends charging at 150°C with 10°C hysteresis. Input UVLO (4.15 V) and OVP (13 V) protect against supply anomalies, and automatic power-down disables operation when V_DD falls within +50 mV of V_BAT.

Key Specifications

Parameter	Value and Actual Design Meaning
Charge Voltage	8.40 V ±0.6% - Factory-trimmed for dual-cell Li-ion nominal 8.4 V systems; ensures safe, full-capacity charging without overvoltage stress.
Input OVP Threshold	13.0 V ±0.2 V - Protects device and battery during wall-adapter surges or plug/unplug transients; hysteresis prevents chatter.
Fast Charge Current Range	130–1100 mA - Set via single PROG-to-VSS resistor; enables flexible trade-offs between charge time and thermal dissipation.
Preconditioning	10% of I_REG - Activates below 71.5% of V_REG (≈6.0 V) to safely recover deeply depleted cells before fast charge.
End-of-Charge Termination	10% of I_REG - Stops CV phase when current drops to 10% of programmed fast charge value; balances capacity recovery vs. cell stress.
Recharge Threshold	95% of V_REG (≈8.0 V) - Triggers new charge cycle after self-discharge; avoids premature recharging and extends cycle life.
Operating Temperature	–40°C to +85°C - Fully specified ambient range; supports industrial-grade portable devices in harsh environments.
Package	DFN-10 (3 mm × 3 mm) with exposed thermal pad - Enables compact PCB layout and efficient heat transfer to copper planes.

Pinout & Package

Package: 10-lead DFN (3 mm × 3 mm) with exposed thermal pad (EP) for enhanced thermal performance. EP must be soldered to PCB copper pour with multiple thermal vias.

Pin/Terminal	Circuit Role	Design Meaning
VDD (Pins 1, 2)	Battery management input supply	Accepts 4.2–13 V DC input; 18 V absolute max; bypass with ≥1 μF capacitor; powers internal circuitry and gate drive.
VBAT (Pins 3, 4)	Battery charge control output	Drain of internal P-MOSFET; connects directly to positive terminal of 2-cell Li-ion pack; requires ≥1 μF output capacitance.
NC (Pins 5, 6)	No connection	Unbonded pins; must remain floating; no routing or soldering required.
STAT (Pin 7)	Status output	Open-drain indicator; sinks up to 35 mA; low during active charge, high-Z at completion; supports LED or MCU interface.
VSS (Pins 8, 9)	Ground reference	Common return for battery negative, input supply ground, and all internal circuits; low-impedance PCB plane connection essential.
PROG (Pin 10)	Current regulation & enable	Resistor sets fast charge current (I_REG = 1104/R_PROG); >200 kΩ impedance forces standby mode.
EP (Pin 11)	Exposed thermal pad	Internally connected to VSS; must be soldered to PCB ground plane with ≥4 thermal vias for thermal regulation compliance.

Key Features

Feature	Design Value
Integrated pass transistor	350 mΩ R_DS(on) at 105°C - Eliminates need for external MOSFET and gate driver; reduces BOM count and layout area.
Input overvoltage protection	13 V threshold with 150 mV hysteresis - Safeguards against low-cost AC-DC adapter spikes without external TVS diodes.
Factory-preset charge profile	8.40 V / 10% precondition / 32-min timer / 6-hr safety timer / 10% termination / 95% recharge / Type 1 STAT - Reduces design validation effort and eliminates configuration firmware.
Reverse discharge protection	≤2 μA leakage at V_DD < V_BAT - Prevents battery self-discharge through input path when adapter is disconnected.
Thermal regulation	Dynamic current reduction above ~105°C - Maintains safe junction temperature without external thermal sensors or feedback loops.
Soft-start	Controlled V_BAT ramp during CC entry - Minimizes inrush current and output voltage overshoot into partially charged batteries.

Applications

Digital Camcorders	Portable Media Players
Use Scenario: Compact camcorders requiring rapid, reliable charging from USB-powered adapters or proprietary docks. IC Role / Device Role / Timing Role: Dual-cell Li-ion charge controller managing CC/CV profile, preconditioning, and end-of-charge detection. Use Value: Enables full 8.40 V regulation accuracy (±0.6%) across operating temperature, ensuring consistent runtime and battery longevity without host MCU intervention.	Use Scenario: Battery-powered audio/video players with space-limited PCBs and cost-sensitive BOM targets. IC Role / Device Role / Timing Role: Standalone linear charger providing factory-configured 8.40 V output, 10% trickle charge, and 6-hour safety timer. Use Value: Eliminates need for external current-sense resistors, OVP ICs, or status GPIOs-reducing component count by ≥4 and saving ≥12 mm² board area.
Ultra-Mobile PCs	Walkie-Talkies
Use Scenario: Fanless, thin-profile UMPCs where thermal headroom is constrained and battery runtime optimization is critical. IC Role / Device Role / Timing Role: Thermal-regulated linear charger limiting current above 105°C to prevent overheating during fast charge. Use Value: Delivers up to 1100 mA fast charge while maintaining safe die temperature via analog thermal foldback-no software or external sensor required.	Use Scenario: Rugged two-way radios used in field deployments with variable ambient temperatures and unregulated wall adapters. IC Role / Device Role / Timing Role: Robust charge manager with 13 V OVP, –40°C to +85°C operation, and automatic recharge at 95% V_REG. Use Value: Survives 18 V transient surges and maintains charge functionality down to –40°C, enabling reliable operation in outdoor and industrial environments.

Digital Camcorders

Portable Media Players

Use Scenario: Compact camcorders requiring rapid, reliable charging from USB-powered adapters or proprietary docks.

IC Role / Device Role / Timing Role: Dual-cell Li-ion charge controller managing CC/CV profile, preconditioning, and end-of-charge detection.

Use Value: Enables full 8.40 V regulation accuracy (±0.6%) across operating temperature, ensuring consistent runtime and battery longevity without host MCU intervention.

Use Scenario: Battery-powered audio/video players with space-limited PCBs and cost-sensitive BOM targets.

IC Role / Device Role / Timing Role: Standalone linear charger providing factory-configured 8.40 V output, 10% trickle charge, and 6-hour safety timer.

Use Value: Eliminates need for external current-sense resistors, OVP ICs, or status GPIOs-reducing component count by ≥4 and saving ≥12 mm² board area.

Ultra-Mobile PCs

Walkie-Talkies

Use Scenario: Fanless, thin-profile UMPCs where thermal headroom is constrained and battery runtime optimization is critical.

IC Role / Device Role / Timing Role: Thermal-regulated linear charger limiting current above 105°C to prevent overheating during fast charge.

Use Value: Delivers up to 1100 mA fast charge while maintaining safe die temperature via analog thermal foldback-no software or external sensor required.

Use Scenario: Rugged two-way radios used in field deployments with variable ambient temperatures and unregulated wall adapters.

IC Role / Device Role / Timing Role: Robust charge manager with 13 V OVP, –40°C to +85°C operation, and automatic recharge at 95% V_REG.

Use Value: Survives 18 V transient surges and maintains charge functionality down to –40°C, enabling reliable operation in outdoor and industrial environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-cell Li-ion linear charge management applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP73213-A6S/MF	Identical package, pinout, and feature set; differs only in factory preset: same 8.40 V V_REG, but uses 10% precondition, 32-min timer, 6-hr elapse timer, 10% termination, 95% recharge, and Type 1 STAT output - matches MCP73213-A21I/MF exactly per Microchip DS20002190D Table 2.	No functional difference; both support identical 2-cell Li-ion applications including portable media players and UMPCs.	Select based on distributor availability and tape-and-reel packaging preference; electrical and thermal behavior are indistinguishable.
BQ24075RGTR	Single-cell focused (4.2 V), lacks dual-cell 8.4 V option; no factory-set 8.40 V regulation; requires external resistor network for voltage setting; no integrated 13 V OVP.	Suitable only for single-cell Li-ion systems; cannot replace MCP73213-A21I/MF in dual-cell configurations without redesign.	Not a drop-in alternative; use only if migrating to single-cell architecture with separate voltage scaling and external OVP.

Compared with MCP73213-A21I/MF, MCP73213-A6S/MF is electrically and functionally identical-same V_REG, timing, thresholds, and status behavior-making it a seamless sourcing alternative, whereas BQ24075RGTR serves a different voltage-class application and requires board-level changes.

Availability

MCP73213-A21I/MF is available at Aetrix Electronics and suitable for digital camcorders, ultra-mobile PCs, and walkie-talkies requiring stable component supply, long-term lifecycle support, and guaranteed factory configuration integrity.

Supply support for MCP73213-A21I/MF 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 is a leading provider of microcontrollers, analog components, and battery management ICs, with deep expertise in low-power, mixed-signal system solutions.

The MCP73213 product line delivers highly integrated, factory-configured linear chargers for dual-cell Li-ion/Li-polymer batteries-designed specifically for cost-sensitive, space-constrained portable electronics where minimal external components and guaranteed charge profiles are essential.

FAQ

What is the factory-preset charge voltage for MCP73213-A21I/MF?

The MCP73213-A21I/MF is factory preset to 8.40 V regulated output voltage with ±0.6% accuracy over –5°C to +55°C. This value is laser-trimmed during production and cannot be adjusted externally. It is optimized for standard 2-cell Li-ion battery packs with nominal 8.4 V and 4.2 V/cell chemistry, ensuring safe, full-capacity charging without overvoltage risk. The MCP73213-A21I/MF datasheet (DS20002190D, Table 2) confirms this exact configuration.

Does MCP73213-A21I/MF support automatic recharge, and at what threshold?

Yes, MCP73213-A21I/MF supports automatic recharge at a factory-set threshold of 95% of its regulated voltage (0.95 × 8.40 V = ≈8.0 V). When battery voltage drops below this level after charge completion, the device initiates a new charge cycle. This behavior is confirmed in Microchip's DS20002190D-page 3 Table 2 and page 18 Section 5.8. No external components or host control are required-the function is fully autonomous and integrated.

What is the role of the PROG pin on MCP73213-A21I/MF beyond setting charge current?

On MCP73213-A21I/MF, the PROG pin serves a dual role: it sets fast charge current via an external resistor (I_REG = 1104/R_PROG), and functions as a hardware enable/disable input. When impedance exceeds ~200 kΩ (e.g., open circuit or high-Z MCU GPIO), the device enters standby mode with <150 μA quiescent current. This allows system-level power gating without additional enable logic. The behavior is documented in DS20002190D-page 13 Section 3.6 and page 15 Figure 4-1.

How does thermal regulation operate in MCP73213-A21I/MF, and at what temperature does it begin?

MCP73213-A21I/MF begins thermal regulation-gradually reducing charge current-when die temperature exceeds approximately 105°C, as specified in DS20002190D-page 7 and Figure 5-1. This analog foldback mechanism maintains reliability without software intervention. If temperature reaches 150°C, thermal shutdown suspends charging entirely until die cools by ~10°C. Regulation is enabled by default and requires no external components; effective thermal design depends on proper EP soldering and PCB copper area.

What package type and thermal characteristics apply to MCP73213-A21I/MF?

MCP73213-A21I/MF uses a 10-lead DFN package (3 mm × 3 mm) with exposed thermal pad (EP), as shown in DS20002190D-page 2. Its thermal resistance is θ_JA = 62°C/W (4-layer board, natural convection) and θ_JC = 20.5°C/W. The EP must be soldered to a PCB ground plane with ≥4 thermal vias to achieve rated performance. This package enables compact layouts while supporting up to 1100 mA charge current with appropriate board-level thermal management.

MCP73213-A21I/MF Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 10-VFDFN Exposed Pad

Packaging:: Tube

Product Status:: Active

Battery Chemistry:: Lithium Ion/Polymer

Number of Cells:: 2

Current - Charging:: Constant - Programmable

Programmable Features:: -

Fault Protection:: Over Voltage

Charge Current - Max:: 1.1A

Battery Pack Voltage:: 8.8V

Voltage - Supply (Max):: 13V

Interface:: -

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 10-DFN (3x3)

MCP73213-A21I/MF FAQ

1.How can I place an order for MCP73213-A21I/MF through Aetrix?

Please submit a Request for Quotation (RFQ) for MCP73213-A21I/MF 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 MCP73213-A21I/MF reliable?

The price and inventory of MCP73213-A21I/MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP73213-A21I/MF is usually 5 days.

3.What payment methods are accepted for MCP73213-A21I/MF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73213-A21I/MF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MCP73213-A21I/MF?

MCP73213-A21I/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MCP73213-A21I/MF 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 MCP73213-A21I/MF?

For technical support, including MCP73213-A21I/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73213-A21I/MF requirements.

6.How does Aetrix verify that MCP73213-A21I/MF is sourced from the original manufacturer or authorized distributors?

All MCP73213-A21I/MF 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 MCP73213-A21I/MF meets industry standards.

7.What is the process for return or replacement of MCP73213-A21I/MF?

All MCP73213-A21I/MF units undergo pre-shipment inspection (PSI). If there is an issue with MCP73213-A21I/MF, 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 MCP73213-A21I/MF part is unused and in its original packaging.

Return procedure for MCP73213-A21I/MF:

1.Submit a request within 90 days.

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

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