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

Microchip Technology MCP73833-AMI/MF

Name: MCP73833-AMI/MF
Brand: Microchip Technology
SKU: MCP73833-AMI/MF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MCP73833-AMI/MF

Manufacturer:: Microchip Technology

Category:: Battery Chargers

Package:: 10-VFDFN Exposed Pad

Datasheet:: MCP73833-AMI/MF.pdf

Description:: IC BATT CONTRL LI-ION 1CEL 10DFN

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Product details

Overview

MCP73833-AMI/MF from Microchip Technology is a stand-alone linear Li-ion/Li-polymer battery charge management controller in MSOP-10 package, featuring 4.20 V ±0.75% constant-voltage regulation, programmable up to 1 A fast-charge current via external PROG resistor, integrated P-channel MOSFET pass transistor (300 mΩ typical R_DS(on)), and dual status outputs (STAT1/STAT2) for LED or microcontroller interface - deployed in USB-powered portable devices requiring thermal-regulated, preconditioning-capable charging.

For engineers reviewing the MCP73833-AMI/MF datasheet, MCP73833-AMI/MF pinout, MCP73833-AMI/MF application, or MCP73833-AMI/MF equivalent, key selection considerations include its factory-set 4.20 V regulation voltage, 100 mV UVLO hysteresis, thermistor-based temperature monitoring with 1.23 V / 0.25 V thresholds, automatic recharge at 94% of V_REG, and compatibility with 10 kΩ NTC thermistors.

Technical Context

The MCP73833-AMI/MF implements a three-phase linear charge algorithm: preconditioning (trickle charge at 10%–100% of I_REG when V_BAT < 66.5%–70% of V_REG), constant-current fast charge (programmable 90–1100 mA), and constant-voltage regulation (4.20 V ±0.75%). It integrates thermal regulation that reduces charge current above ~105°C and full thermal shutdown at 150°C with 10°C hysteresis.

Its analog control architecture includes a precision 1.21 V reference, ratiometric current sensing (G = 0.001), and dual comparators for termination (5%–25% of I_REG) and automatic recharge (94%–96.5% of V_REG). The device supports system test (LDO) mode when THERM > V_DD − 100 mV, delivering regulated output up to programmed I_REG without battery present.

Key Specifications

Parameter	Value and Actual Design Meaning
V_REG	4.20 V ±0.75% - Factory-trimmed regulation voltage for single-cell Li-ion batteries; ensures safe, compliant charging per JEITA standards.
Max Fast Charge Current	1000 mA - Programmable via 1.0 kΩ PROG-to-VSS resistor; enables rapid charging of 1000–2000 mAh batteries.
R_DS(on)	300 mΩ typical - Low on-resistance of internal P-MOSFET pass transistor minimizes power loss and thermal stress at 1 A.
Thermistor Bias Current	50 µA ±6% - Stable current source for 10 kΩ NTC thermistors; enables accurate battery temperature monitoring across −40°C to +85°C.
UVLO Thresholds	V_START = 3.55 V, V_STOP = 3.45 V - 100 mV hysteresis prevents oscillation during input brownout; blocks charging until V_DD exceeds battery voltage by ≥150 mV.
Charge Termination Ratio	5% of I_REG - Fixed current threshold for end-of-charge detection; eliminates need for external sense resistors or timing circuits.
Operating Temp Range	−40°C to +85°C - Fully specified ambient range; supports industrial and consumer portable applications without derating.

Pinout & Package

Package: MSOP-10 (3 mm × 3 mm, 0.5 mm pitch), exposed thermal pad (EP) internally connected to VSS - requires PCB copper pour tied to VSS for thermal performance and EMI reduction.

Pin/Terminal	Circuit Role	Design Meaning
VDD (Pins 1, 2)	Battery management input supply	Dual-input configuration accepts 3.75–6 V; bypassed with ≥1 µF ceramic capacitor; triggers UVLO shutdown if <3.45 V.
STAT1 / STAT2 (Pins 3, 4)	Open-drain charge status outputs	Drive LEDs directly (with pull-up) or interface to MCU GPIO; encode charge state (e.g., STAT1=LOW/STAT2=Hi-Z = fast charge active).
VSS (Pin 5)	0 V reference	Common ground for battery negative, input supply return, and EP connection; must be low-impedance path.
PROG (Pin 6)	Current regulation set and enable	Resistor to VSS sets I_REG; floating disables charger and limits reverse discharge to <2 µA.
PG (Pin 7)	Power good indication	Pseudo open-drain output; sinks current when V_DD > UVLO and V_DD > V_BAT; must be pulled up only to V_DD.
THERM (Pin 8)	Thermistor input	50 µA bias current source; compares voltage to 1.23 V (high-temp trip) and 0.25 V (low-temp trip); fault halts charging immediately.
VBAT (Pins 9, 10)	Battery charge control output	Drain of internal P-MOSFET; connects to battery positive; bypassed with ≥4.7 µF ceramic capacitor for stability at I_OUT > 250 mA.

Key Features

Feature	Design Value
Integrated pass transistor	On-chip P-channel MOSFET with 300 mΩ R_DS(on) eliminates external FET and gate driver, reducing BOM count and layout area.
Thermal regulation	Automatic current foldback above ~105°C (per Figure 4-2) maintains safe die temperature without external thermal sensors or feedback loops.
Preconditioning & auto-recharge	User-selectable trickle-charge ratio (10%–100% of I_REG) and fixed 94% V_REG recharge threshold prevent over-discharge damage and extend cycle life.
System test (LDO) mode	Enables regulated 4.20 V output without battery when THERM > V_DD − 100 mV - useful for board-level functional testing and battery-less system validation.
Reverse discharge protection	Internal circuitry limits battery-to-input leakage to <0.25 µA when V_DD is absent - preserves battery charge during storage or unplugged operation.

Applications

USB-Powered Portable Devices	Space-Constrained Wearables
Use Scenario: Charging Bluetooth headsets and wireless earbuds from 5 V USB ports with strict thermal and size constraints. IC Role / Device Role / Timing Role: Stand-alone linear charger managing CC/CV profile, thermistor-based safety, and dual-LED status indication. Use Value: Eliminates need for external MOSFET, current sense, and timer ICs - reduces solution footprint to <12 mm² while meeting USB-IF power delivery compliance.	Use Scenario: Powering compact fitness trackers with single-cell Li-polymer batteries and embedded temperature monitoring. IC Role / Device Role / Timing Role: Battery management controller providing preconditioning, thermal cutoff, and automatic recharge without host MCU intervention. Use Value: Enables reliable charging down to −10°C ambient via NTC thermistor interface and prevents overcharge at high temperatures using factory-trimmed 1.23 V/0.25 V thresholds.
Industrial Handheld Terminals	Medical Sensor Pods
Use Scenario: Recharging ruggedized barcode scanners operating in variable-temperature warehouses. IC Role / Device Role / Timing Role: Linear charge controller with −40°C to +85°C specification, UVLO hysteresis, and reverse discharge protection. Use Value: Ensures stable charging across wide ambient ranges; 100 mV UVLO hysteresis prevents false restarts during input voltage ripple or transient dips.	Use Scenario: Charging disposable or reusable patient-worn biosensor patches with stringent safety and low leakage requirements. IC Role / Device Role / Timing Role: Safety-certifiable charge manager delivering 4.20 V ±0.75% regulation, <2 µA reverse leakage, and thermal fault lockout. Use Value: Meets IEC 62368-1 creepage/clearance requirements via integrated pass transistor and eliminates external high-side switch leakage paths.

USB-Powered Portable Devices

Space-Constrained Wearables

Use Scenario: Charging Bluetooth headsets and wireless earbuds from 5 V USB ports with strict thermal and size constraints.

IC Role / Device Role / Timing Role: Stand-alone linear charger managing CC/CV profile, thermistor-based safety, and dual-LED status indication.

Use Value: Eliminates need for external MOSFET, current sense, and timer ICs - reduces solution footprint to <12 mm² while meeting USB-IF power delivery compliance.

Use Scenario: Powering compact fitness trackers with single-cell Li-polymer batteries and embedded temperature monitoring.

IC Role / Device Role / Timing Role: Battery management controller providing preconditioning, thermal cutoff, and automatic recharge without host MCU intervention.

Use Value: Enables reliable charging down to −10°C ambient via NTC thermistor interface and prevents overcharge at high temperatures using factory-trimmed 1.23 V/0.25 V thresholds.

Industrial Handheld Terminals

Medical Sensor Pods

Use Scenario: Recharging ruggedized barcode scanners operating in variable-temperature warehouses.

IC Role / Device Role / Timing Role: Linear charge controller with −40°C to +85°C specification, UVLO hysteresis, and reverse discharge protection.

Use Value: Ensures stable charging across wide ambient ranges; 100 mV UVLO hysteresis prevents false restarts during input voltage ripple or transient dips.

Use Scenario: Charging disposable or reusable patient-worn biosensor patches with stringent safety and low leakage requirements.

IC Role / Device Role / Timing Role: Safety-certifiable charge manager delivering 4.20 V ±0.75% regulation, <2 µA reverse leakage, and thermal fault lockout.

Use Value: Meets IEC 62368-1 creepage/clearance requirements via integrated pass transistor and eliminates external high-side switch leakage paths.

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
BQ24075RGTR	Fixed 4.2 V regulation, no programmable V_REG options; 1.5 A max charge current; no integrated thermistor comparator - requires external NTC circuit.	Lacks factory-set temperature thresholds and automatic recharge; suited for cost-sensitive designs where thermal monitoring is handled externally.	Select BQ24075RGTR only if 1.5 A current and simplified thermal design outweigh need for precise JEITA-compliant temperature qualification.
TP4056	Fixed 4.2 V regulation, no V_REG variants; 1 A max current; no thermistor input; no PG output; no preconditioning - minimal feature set.	Targeted at ultra-low-cost consumer electronics without safety-critical thermal or voltage flexibility requirements.	Choose TP4056 only for non-safety-critical applications where full-featured thermal regulation, automatic recharge, and multiple V_REG options are unnecessary.

Compared with BQ24075RGTR and TP4056, the MCP73833-AMI/MF delivers superior thermal safety via integrated 1.23 V/0.25 V NTC comparators, guaranteed 4.20 V ±0.75% regulation accuracy, and factory-configured automatic recharge - making it optimal for medical, industrial, and premium portable designs demanding robust battery protection.

Availability

MCP73833-AMI/MF is available at Aetrix Electronics and suitable for USB chargers, wearable electronics, handheld terminals, and medical sensor pods requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance.

Supply support for MCP73833-AMI/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 core expertise in embedded control and power management solutions.

The MCP73833-AMI/MF belongs to Microchip's linear Li-ion charge controller product line, designed specifically for space-constrained, thermally sensitive portable applications requiring high-accuracy voltage regulation and integrated safety features.

FAQ

What is the factory-set regulation voltage for the MCP73833-AMI/MF?

The MCP73833-AMI/MF is factory-configured for 4.20 V ±0.75% constant-voltage regulation - optimized for standard single-cell Li-ion and Li-polymer batteries. This value is laser-trimmed and cannot be adjusted externally; other variants (e.g., MCP73833-435I/MF) offer 4.35 V, but the -AMI/MF designation confirms the 4.20 V option per Microchip's Product Identification System.

How does the MCP73833-AMI/MF implement thermal regulation during charging?

The MCP73833-AMI/MF uses on-die temperature sensing to reduce charge current above ~105°C, as shown in Figure 4-2 of DS22005B. This foldback behavior optimizes charge time while preventing thermal runaway. If junction temperature reaches 150°C, the device enters thermal shutdown and resumes charging only after cooling by ~10°C - a secondary safety layer independent of the primary thermal regulation loop.

Can the MCP73833-AMI/MF be used without a battery connected?

Yes - the MCP73833-AMI/MF supports System Test (LDO) mode. When THERM is driven above V_DD − 100 mV and no battery is present, it regulates VBAT to 4.20 V with current limited by the PROG resistor. This allows functional testing of downstream circuitry without a battery, provided ≥4.7 µF output capacitance is used for stability at higher loads.

What is the function of the PG pin on the MCP73833-AMI/MF?

The PG (Power Good) pin on the MCP73833-AMI/MF is a pseudo open-drain output that sinks current when V_DD exceeds the UVLO threshold (≥3.45 V) and remains above the battery voltage. It signals valid input power presence to system logic. Because PG has an internal diode path to V_DD, it must only be pulled up to V_DD - not to a separate rail - to avoid unintended current flow.

Does the MCP73833-AMI/MF support automatic recharge, and at what threshold?

Yes, the MCP73833-AMI/MF performs automatic recharge when battery voltage falls below 94.0% of V_REG (i.e., 3.948 V for the 4.20 V variant). This threshold is factory-fixed and non-adjustable. Upon crossing this point, the device reinitiates preconditioning or fast charge as appropriate - extending usable runtime between manual recharges while preventing deep discharge damage.

MCP73833-AMI/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:: 1

Current - Charging:: Constant - Programmable

Programmable Features:: Current

Fault Protection:: Over Temperature

Charge Current - Max:: 1.1A

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:: 10-DFN (3x3)

MCP73833-AMI/MF FAQ

1.How can I place an order for MCP73833-AMI/MF through Aetrix?

Please submit a Request for Quotation (RFQ) for MCP73833-AMI/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 MCP73833-AMI/MF reliable?

The price and inventory of MCP73833-AMI/MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP73833-AMI/MF is usually 5 days.

3.What payment methods are accepted for MCP73833-AMI/MF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73833-AMI/MF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MCP73833-AMI/MF?

MCP73833-AMI/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MCP73833-AMI/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 MCP73833-AMI/MF?

For technical support, including MCP73833-AMI/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73833-AMI/MF requirements.

6.How does Aetrix verify that MCP73833-AMI/MF is sourced from the original manufacturer or authorized distributors?

All MCP73833-AMI/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 MCP73833-AMI/MF meets industry standards.

7.What is the process for return or replacement of MCP73833-AMI/MF?

All MCP73833-AMI/MF units undergo pre-shipment inspection (PSI). If there is an issue with MCP73833-AMI/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 MCP73833-AMI/MF part is unused and in its original packaging.

Return procedure for MCP73833-AMI/MF:

1.Submit a request within 90 days.

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

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