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

Microchip Technology MCP73833T-BZI/MF

Name: MCP73833T-BZI/MF
Brand: Microchip Technology
SKU: MCP73833T-BZI/MF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MCP73833T-BZI/MF

Manufacturer:: Microchip Technology

Category:: Battery Chargers

Package:: 10-VFDFN Exposed Pad

Datasheet:: MCP73833T-BZI/MF.pdf

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

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Product details

Overview

MCP73833T-BZI/MF from Microchip Technology is a stand-alone linear Li-ion/Li-polymer charge management controller in a 10-lead DFN-10 (3 mm × 3 mm) package, featuring integrated P-channel MOSFET pass transistor, current sense, and reverse discharge protection. It delivers ±0.75% voltage regulation at 4.20 V (typical), supports up to 1 A programmable charge current via external resistor, and includes thermal regulation, preconditioning, automatic recharge, and dual status outputs - optimized for USB-powered portable devices.

For engineers reviewing the MCP73833T-BZI/MF datasheet, MCP73833T-BZI/MF pinout, MCP73833T-BZI/MF application, or MCP73833T-BZI/MF equivalent, key selection criteria include its factory-set 4.20 V regulation, thermal foldback behavior above 105°C, PROG-resistor-based current programming (1–10 kΩ range), THERM-pin thermistor bias (50 µA), and PG output functionality specific to MCP73833 variants.

Technical Context

The MCP73833T-BZI/MF implements a constant-current/constant-voltage (CC/CV) charging algorithm with factory-trimmed voltage regulation (4.20 V ±0.75%), ratiometric preconditioning (10% of I_REG), and termination (5% of I_REG). Its internal P-channel MOSFET has 300 mΩ typical R_DS(on), enabling efficient linear regulation while supporting thermal regulation that reduces charge current above ~105°C junction temperature.

It integrates dual open-drain status outputs (STAT1, STAT2), a pseudo-open-drain PG output active when V_DD > UVLO threshold and V_DD > V_BAT, and a 50 µA thermistor bias current source referenced to V_SS. The device operates across –40°C to +85°C ambient and enters automatic power-down when V_DD falls within 50 mV of V_BAT.

Key Specifications

Parameter	Value and Actual Design Meaning
Voltage Regulation	4.20 V ±0.75% - factory-trimmed reference ensures battery safety and cycle life compliance for standard Li-ion cells.
Max Charge Current	1000 mA - set by 1.0 kΩ PROG-to-VSS resistor; scalable down to 100 mA using 10 kΩ resistor.
Preconditioning Ratio	10% of I_REG - enables safe trickle-charge recovery of deeply depleted cells below 2.94 V (66.5% × 4.20 V).
Thermal Regulation Threshold	~105°C junction - begins reducing charge current to prevent thermal runaway and maintain reliability under high-power conditions.
UVLO Threshold	3.55 V (typical start), 3.45 V (stop), 100 mV hysteresis - prevents operation during insufficient input supply and avoids battery drain when input is removed.
THERM Bias Current	50 µA ±6% - drives standard 10 kΩ NTC thermistors for accurate battery temperature monitoring without external components.
PG Output Logic	Active-low pseudo-open-drain - sinks current only; must be pulled up to V_DD; indicates valid input power and V_DD > V_BAT.

Pinout & Package

Package: DFN-10 (3 mm × 3 mm), exposed thermal pad (EP) electrically connected to VSS. Requires soldering EP to PCB ground plane for thermal performance and electrical integrity.

Pin/Terminal	Circuit Role	Design Meaning
VDD (Pins 1, 2)	Battery management input supply	Accepts 3.75–6 V input; powers internal circuitry and gate drive; bypass with ≥1 µF to VSS.
STAT1 (Pin 3)	Charge status output	Open-drain; low during charging, high-impedance at end-of-charge; drives LED or MCU GPIO.
STAT2 (Pin 4)	Charge status output	Open-drain; high-impedance during charging, low at end-of-charge; complements STAT1 for state decoding.
VSS (Pin 5)	Ground reference	Common return for battery negative, input supply, PROG resistor, and EP connection.
PROG (Pin 6)	Current regulation and enable input	Resistor to VSS sets fast charge current (I_REG = 1000 V/R_PROG); floating disables charger.
PG (Pin 7)	Power good indicator	Pseudo-open-drain; low when V_DD > UVLO and V_DD > V_BAT; must pull up to V_DD only.
THERM (Pin 8)	Thermistor interface	50 µA current source; compares voltage to 1.23 V / 0.25 V thresholds for over/under-temperature fault detection.
VBAT (Pins 9, 10)	Battery charge control output	Drain of internal P-MOSFET; connects to battery positive; bypass with ≥4.7 µF ceramic capacitor for stability.
EP (Pin 11)	Exposed thermal pad	Internally tied to VSS; must be soldered to PCB ground plane for thermal dissipation and EMI reduction.

Key Features

Feature	Design Value
Integrated P-channel MOSFET pass transistor	Eliminates external high-side switch; 300 mΩ R_DS(on) at V_DD = 3.75 V enables compact, low-BOM-count USB charger designs.
Programmable CC/CV charge profile	Single resistor (PROG) sets full-scale current; factory-fixed 4.20 V regulation ensures compatibility with JEITA-compliant Li-ion cells.
Thermal regulation with foldback	Automatically reduces charge current above ~105°C junction temperature - maintains safe operation without external thermal sensors or shutdown logic.
Dual independent status outputs (STAT1/STAT2)	Support unambiguous state indication (charging vs. complete) for LED drivers or host microcontrollers without additional decoding logic.
Reverse discharge protection	Blocks battery-to-input leakage (<2 µA) when V_DD is absent or below V_BAT, preserving battery charge during system standby.
System test (LDO) mode	Enables VBAT output regulation at 4.20 V without battery - useful for board-level functional testing and system power validation.

Applications

USB-Powered Portable Charger	Smart Wearable Battery Management
Use Scenario: Charging single-cell Li-ion batteries from 5 V USB ports in compact consumer electronics. IC Role / Device Role / Timing Role: Stand-alone linear charge controller managing CC/CV profile, thermal foldback, and end-of-charge signaling. Use Value: Meets USB-IF power delivery limits (≤500 mA default, ≤900 mA high-power) while maintaining ±0.75% voltage accuracy and <2 µA reverse leakage.	Use Scenario: Powering fitness trackers and smart earbuds with space-constrained PCB layouts and thermal sensitivity. IC Role / Device Role / Timing Role: Integrated battery charger with thermistor-based temperature supervision and automatic recharge on voltage sag. Use Value: 3 mm × 3 mm DFN package and 50 µA THERM bias enable direct integration with 10 kΩ NTCs - no external op-amps or ADC required.
Bluetooth Headset Power System	Industrial Handheld Scanner
Use Scenario: Recharging sealed Li-polymer batteries in always-on audio devices with strict quiescent current requirements. IC Role / Device Role / Timing Role: Low-quiescent linear charger providing 150–300 µA standby current and automatic power-down when input is removed. Use Value: 100 µA typical charge-complete supply current extends shelf life; PG output confirms valid input presence before enabling system power rails.	Use Scenario: Field-deployed barcode scanners requiring robust battery charging under variable ambient temperatures (–40°C to +85°C). IC Role / Device Role / Timing Role: Temperature-monitored charger with factory-trimmed 4.20 V regulation and thermal foldback to sustain reliability in hot environments. Use Value: Guaranteed operation across industrial temperature range; 100 mV UVLO hysteresis prevents oscillation during brown-out conditions.

USB-Powered Portable Charger

Smart Wearable Battery Management

Use Scenario: Charging single-cell Li-ion batteries from 5 V USB ports in compact consumer electronics.

IC Role / Device Role / Timing Role: Stand-alone linear charge controller managing CC/CV profile, thermal foldback, and end-of-charge signaling.

Use Value: Meets USB-IF power delivery limits (≤500 mA default, ≤900 mA high-power) while maintaining ±0.75% voltage accuracy and <2 µA reverse leakage.

Use Scenario: Powering fitness trackers and smart earbuds with space-constrained PCB layouts and thermal sensitivity.

IC Role / Device Role / Timing Role: Integrated battery charger with thermistor-based temperature supervision and automatic recharge on voltage sag.

Use Value: 3 mm × 3 mm DFN package and 50 µA THERM bias enable direct integration with 10 kΩ NTCs - no external op-amps or ADC required.

Bluetooth Headset Power System

Industrial Handheld Scanner

Use Scenario: Recharging sealed Li-polymer batteries in always-on audio devices with strict quiescent current requirements.

IC Role / Device Role / Timing Role: Low-quiescent linear charger providing 150–300 µA standby current and automatic power-down when input is removed.

Use Value: 100 µA typical charge-complete supply current extends shelf life; PG output confirms valid input presence before enabling system power rails.

Use Scenario: Field-deployed barcode scanners requiring robust battery charging under variable ambient temperatures (–40°C to +85°C).

IC Role / Device Role / Timing Role: Temperature-monitored charger with factory-trimmed 4.20 V regulation and thermal foldback to sustain reliability in hot environments.

Use Value: Guaranteed operation across industrial temperature range; 100 mV UVLO hysteresis prevents oscillation during brown-out conditions.

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 voltage option; 1.5 A max current; integrated LDO for system power; no PG output.	Lacks PG status and thermal regulation foldback; better suited for systems needing auxiliary LDO rail, less ideal for thermal-limited enclosures.	Select BQ24075RGTR if auxiliary 3.3 V system rail is required and thermal headroom exceeds 15°C margin.
MCP73871-2CCI/MS	Same family, MSOP-10 package; identical 4.20 V regulation and PROG-based current programming; includes TE pin instead of PG.	TE input enables timer disable during system load sharing; unsuitable where PG status is required for host power sequencing.	Choose MCP73871-2CCI/MS only if timer disable capability is needed and PG output is unnecessary.

Compared with BQ24075RGTR and MCP73871-2CCI/MS, the MCP73833T-BZI/MF uniquely combines PG status signaling, thermal foldback regulation, and DFN-10 footprint - making it optimal for USB-charged wearables where input presence confirmation and thermal safety are design-critical.

Availability

MCP73833T-BZI/MF is available at Aetrix Electronics and suitable for USB-powered portable chargers, Bluetooth headsets, smart wearables, and industrial handheld scanners requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance.

Supply support for MCP73833T-BZI/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 devices, and battery management ICs, with deep expertise in low-power, mixed-signal semiconductor solutions for embedded and portable applications.

The MCP73833/4 product line was designed specifically for cost-sensitive, space-constrained Li-ion/Li-polymer charging in consumer and industrial portable electronics - emphasizing integration, thermal resilience, and USB compliance.

FAQ

What is the factory-set voltage regulation for MCP73833T-BZI/MF?

The MCP73833T-BZI/MF has a factory-trimmed constant-voltage regulation of 4.20 V ±0.75%, optimized for standard single-cell Li-ion and Li-polymer batteries. This value is fixed and not user-programmable; other variants in the MCP73833/4 family offer 4.35 V, 4.40 V, or 4.50 V options, but MCP73833T-BZI/MF exclusively uses 4.20 V.

How does the PG output on MCP73833T-BZI/MF function?

The PG (Power Good) output on MCP73833T-BZI/MF is a pseudo-open-drain signal that goes low when V_DD exceeds the UVLO start threshold (3.55 V typ.) and remains higher than V_BAT. It must be pulled up only to V_DD due to an internal diode path - connecting to any other voltage risks damage. This behavior is unique to MCP73833 variants like MCP73833T-BZI/MF and differs from MCP73834's TE pin.

Can MCP73833T-BZI/MF operate without a battery connected?

Yes - MCP73833T-BZI/MF supports System Test (LDO) mode. When THERM is driven above (V_DD − 100 mV) and no battery is present, the device regulates V_BAT at 4.20 V with current limited by the PROG resistor. This allows functional verification of downstream circuitry without a battery, and the MCP73833T-BZI/MF remains in this mode until THERM is released or input power is cycled.

What is the maximum allowable PROG resistor value for reliable operation of MCP73833T-BZI/MF?

The MCP73833T-BZI/MF supports PROG resistor values from 1.0 kΩ (1000 mA) up to 10 kΩ (100 mA) for fast charge current programming. Values above 10 kΩ enter standby impedance range (70–200 kΩ), disabling charging. Therefore, the maximum functional PROG value is 10 kΩ; using 12 kΩ or higher will prevent charge initiation and leave STAT1/STAT2 in high-impedance state.

Does MCP73833T-BZI/MF include thermal shutdown protection?

Yes - MCP73833T-BZI/MF incorporates dual thermal protections: primary thermal regulation (current foldback beginning ~105°C) and secondary thermal shutdown at 150°C (±10°C hysteresis). During shutdown, the pass transistor turns off and the timer halts; charging resumes automatically once die temperature drops by ~10°C. This layered approach ensures robustness in enclosed or high-ambient environments.

MCP73833T-BZI/MF Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 10-VFDFN Exposed Pad

Packaging:: Tape & Reel (TR)

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)

MCP73833T-BZI/MF FAQ

1.How can I place an order for MCP73833T-BZI/MF through Aetrix?

Please submit a Request for Quotation (RFQ) for MCP73833T-BZI/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 MCP73833T-BZI/MF reliable?

The price and inventory of MCP73833T-BZI/MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP73833T-BZI/MF is usually 5 days.

3.What payment methods are accepted for MCP73833T-BZI/MF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73833T-BZI/MF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MCP73833T-BZI/MF?

MCP73833T-BZI/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MCP73833T-BZI/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 MCP73833T-BZI/MF?

For technical support, including MCP73833T-BZI/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73833T-BZI/MF requirements.

6.How does Aetrix verify that MCP73833T-BZI/MF is sourced from the original manufacturer or authorized distributors?

All MCP73833T-BZI/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 MCP73833T-BZI/MF meets industry standards.

7.What is the process for return or replacement of MCP73833T-BZI/MF?

All MCP73833T-BZI/MF units undergo pre-shipment inspection (PSI). If there is an issue with MCP73833T-BZI/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 MCP73833T-BZI/MF part is unused and in its original packaging.

Return procedure for MCP73833T-BZI/MF:

1.Submit a request within 90 days.

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

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