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

Microchip Technology MCP73833T-NVI/UN

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

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Part No.:: MCP73833T-NVI/UN

Manufacturer:: Microchip Technology

Category:: Battery Chargers

Package:: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

Datasheet:: MCP73833T-NVI/UN.pdf

Description:: IC BATT CNTRL LI-ION 1CEL 10MSOP

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Product details

Overview

MCP73833T-NVI/UN from Microchip Technology is a stand-alone linear Li-ion/Li-polymer battery charge management controller in a 10-lead DFN-3×3 package. It integrates pass transistor, current sense, and reverse discharge protection; delivers 4.20 V ±0.75% constant-voltage regulation and up to 1 A programmable constant-current charging; and supports preconditioning, thermal regulation, and automatic recharge for USB-powered portable devices.

For engineers reviewing the MCP73833T-NVI/UN datasheet, MCP73833T-NVI/UN pinout, MCP73833T-NVI/UN application, or MCP73833T-NVI/UN equivalent, key selection considerations include its factory-set 4.20 V regulation voltage, DFN-10 thermal performance (θ_JA = 41°C/W), integrated thermistor monitoring with 50 µA bias, and PG output functionality - all validated for space-constrained, cost-sensitive battery charging designs.

Technical Context

The MCP73833T-NVI/UN implements a constant-current/constant-voltage (CC/CV) charge algorithm with factory-trimmed 4.20 V regulation, thermal foldback limiting, and automatic end-of-charge termination at 5% of programmed I_REG. Its internal P-channel MOSFET pass device features 300 mΩ R_DS(ON) at V_DD = 3.75 V and T_J = 105°C, enabling efficient linear regulation without external switching components.

It incorporates dual status outputs (STAT1/STAT2), a pseudo-open-drain power-good (PG) signal active when V_DD > UVLO threshold and V_DD > V_BAT, and a dedicated THERM input with 50 µA current source for NTC thermistor interfacing - all operating across –40°C to +85°C ambient temperature range.

Key Specifications

Parameter	Value and Actual Design Meaning
Voltage Regulation	4.20 V ±0.75% - factory-trimmed reference ensures precise single-cell Li-ion termination without external feedback resistors.
Max Charge Current	1000 mA - set via external PROG resistor (e.g., 1.0 kΩ); enables full-rate charging of 1000–2000 mAh batteries in under 2 hours.
Thermal Regulation	Active die-temperature-based current foldback - maintains reliability during high-power operation in compact enclosures.
Package Thermal Resistance	θ_JA = 41°C/W (DFN-10, 4-layer board) - supports sustained 1 A charging without forced airflow or heatsinking.
THERM Bias Current	50 µA ±6% - drives standard 10 kΩ NTC thermistors for accurate battery temperature qualification per JEITA guidelines.
UVLO Threshold	V_START = 3.55 V (typ), V_HYS = 100 mV - prevents erratic startup from weak or noisy USB sources and blocks reverse discharge below 3.45 V.
Pass Transistor R_DS(ON)	300 mΩ (max) - minimizes dropout voltage and power loss at 1 A, enabling ≥3.75 V input operation with low thermal stress.

Pinout & Package

Package: 10-lead DFN (3 mm × 3 mm, exposed thermal pad EP connected to VSS).

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 capacitor to suppress input ripple and enable UVLO hysteresis.
STAT1 / STAT2 (Pins 3,4)	Open-drain charge status indicators	Drive LEDs or microcontroller GPIOs; STAT1 = LOW during charge, STAT2 = LOW at EOC - no external pull-ups required for LED use.
VSS (Pin 5)	0 V reference	Common return for battery negative, input supply ground, and EP connection - critical for accurate current sensing and thermal regulation.
PROG (Pin 6)	Current regulation set and enable	Resistor-to-VSS sets I_REG; floating disables charger and limits reverse discharge to <2 µA - serves as hardware shutdown control.
PG (Pin 7)	Power-good indication	Pseudo-open-drain output sinks current only; must be pulled up to VDD - asserts LOW when input is valid and exceeds battery voltage.
THERM (Pin 8)	Thermistor interface	50 µA current source biases NTC; comparator thresholds (1.23 V / 0.25 V) detect overtemp/undertemp - fault halts charging immediately.
VBAT (Pins 9,10)	Battery charge control output	Drain of internal P-MOSFET; connects directly to cell positive; requires ≥1 µF ceramic bypass for stability during load transients.
EP (Pin 11)	Exposed thermal pad	Internally tied to VSS - must be soldered to PCB ground plane to achieve θ_JA = 41°C/W and sustain 1 A continuous operation.

Key Features

Feature	Design Value
Integrated pass transistor & current sense	Eliminates 3–5 external components (MOSFET, sense resistor, op-amp), reducing BOM count and PCB area by >30% vs discrete solutions.
Factory-set 4.20 V regulation	Guarantees JEITA-compliant Li-ion termination without calibration; avoids risk of overvoltage damage from resistor tolerance drift.
Preconditioning & automatic recharge	Enables safe recovery of deeply discharged cells (<2.5 V) and extends usable battery life by reinitiating charge when V_BAT drops to 94% of V_REG.
Thermal regulation + shutdown	Dynamic current scaling based on die temperature plus hard cutoff at 150°C provides dual-layer safety for unattended charging applications.
System test (LDO) mode	Allows VBAT to regulate at V_REG with up to I_REG current when THERM > (VDD − 100 mV) - enables battery-less system validation during production test.

Applications

USB-Powered Portable Devices	Medical Wearables
Use Scenario: Charging compact consumer electronics (e.g., Bluetooth headsets, digital cameras) directly from USB 2.0 ports with strict 500 mA current limits. IC Role / Device Role / Timing Role: Stand-alone linear charge controller managing CC/CV profile, status signaling, and thermal safety without host MCU intervention. Use Value: Meets USB-IF power delivery specifications while delivering 1 A peak current capability and 4.20 V ±0.75% regulation accuracy for reliable single-cell Li-ion charging.	Use Scenario: Powering and recharging wearable health monitors (e.g., pulse oximeters, ECG patches) requiring certified battery safety and low leakage during standby. IC Role / Device Role / Timing Role: Battery management unit enforcing JEITA temperature windows, preventing overcharge, and minimizing reverse discharge (<0.25 µA) during long-term storage. Use Value: Integrated thermistor monitoring and automatic power-down when VDD removed extend shelf life and ensure regulatory compliance for Class II medical devices.
Industrial Handheld Terminals	Smart Home Sensors
Use Scenario: Enabling rapid field-rechargeable batteries in ruggedized barcode scanners and asset trackers operating across –40°C to +85°C ambient ranges. IC Role / Device Role / Timing Role: Robust linear charger with thermal foldback and wide-input UVLO (3.4–3.7 V) ensuring stable operation under variable industrial power sources. Use Value: DFN-10 package with 41°C/W θ_JA sustains 1 A charging in sealed enclosures; –40°C to +85°C qualification eliminates derating concerns in outdoor deployments.	Use Scenario: Supporting multi-year battery life in battery-operated Zigbee/Z-Wave sensors where ultra-low quiescent current and automatic recharge are essential. IC Role / Device Role / Timing Role: Low-power charge manager providing 100 µA standby current, 50 µA THERM bias, and 94% V_REG auto-recharge threshold to minimize deep discharge cycles. Use Value: Reduces average system current draw by >40% vs basic chargers; extends typical CR2032-backed sensor lifetime from 18 to >30 months.

USB-Powered Portable Devices

Medical Wearables

Use Scenario: Charging compact consumer electronics (e.g., Bluetooth headsets, digital cameras) directly from USB 2.0 ports with strict 500 mA current limits.

IC Role / Device Role / Timing Role: Stand-alone linear charge controller managing CC/CV profile, status signaling, and thermal safety without host MCU intervention.

Use Value: Meets USB-IF power delivery specifications while delivering 1 A peak current capability and 4.20 V ±0.75% regulation accuracy for reliable single-cell Li-ion charging.

Use Scenario: Powering and recharging wearable health monitors (e.g., pulse oximeters, ECG patches) requiring certified battery safety and low leakage during standby.

IC Role / Device Role / Timing Role: Battery management unit enforcing JEITA temperature windows, preventing overcharge, and minimizing reverse discharge (<0.25 µA) during long-term storage.

Use Value: Integrated thermistor monitoring and automatic power-down when VDD removed extend shelf life and ensure regulatory compliance for Class II medical devices.

Industrial Handheld Terminals

Smart Home Sensors

Use Scenario: Enabling rapid field-rechargeable batteries in ruggedized barcode scanners and asset trackers operating across –40°C to +85°C ambient ranges.

IC Role / Device Role / Timing Role: Robust linear charger with thermal foldback and wide-input UVLO (3.4–3.7 V) ensuring stable operation under variable industrial power sources.

Use Value: DFN-10 package with 41°C/W θ_JA sustains 1 A charging in sealed enclosures; –40°C to +85°C qualification eliminates derating concerns in outdoor deployments.

Use Scenario: Supporting multi-year battery life in battery-operated Zigbee/Z-Wave sensors where ultra-low quiescent current and automatic recharge are essential.

IC Role / Device Role / Timing Role: Low-power charge manager providing 100 µA standby current, 50 µA THERM bias, and 94% V_REG auto-recharge threshold to minimize deep discharge cycles.

Use Value: Reduces average system current draw by >40% vs basic chargers; extends typical CR2032-backed sensor lifetime from 18 to >30 months.

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, 1.5 A max current, integrated LDO, no PG output, MSOP-16 package.	Larger footprint, higher current capability, lacks power-good signaling for system-level power sequencing.	Select when higher charge current or integrated LDO for system rail is needed; avoid if PG status or DFN-10 size is mandatory.
TP4056	4.2 V regulation, 1 A max, no thermistor interface, no PG/STAT outputs, SOP-8 package, no UVLO hysteresis.	Lower cost but missing critical safety features: no temperature monitoring, no reverse discharge protection, no status signaling.	Select only for non-safety-critical, cost-driven consumer toys; not suitable for medical, industrial, or USB-certified designs.

Compared with BQ24075RGTR and TP4056, the MCP73833T-NVI/UN uniquely combines DFN-10 compactness, factory-trimmed 4.20 V accuracy, integrated PG output for system power awareness, and robust thermistor-based JEITA compliance - making it optimal for certified, space-constrained USB-charged products.

Availability

MCP73833T-NVI/UN is available at Aetrix Electronics and suitable for USB-powered portable devices, medical wearables, industrial handheld terminals, and smart home sensors requiring stable component supply, long-lifecycle support, and guaranteed traceability.

Supply support for MCP73833T-NVI/UN 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, serving automotive, industrial, and consumer markets with high-reliability silicon and comprehensive design tools.

The MCP73833/4 product line was designed specifically for cost-sensitive, space-constrained Li-ion/Li-polymer charging applications - integrating precision regulation, thermal safety, and USB-compliant operation into minimal-footprint packages.

FAQ

What is the factory-set regulation voltage for MCP73833T-NVI/UN?

The MCP73833T-NVI/UN has a factory-trimmed constant-voltage regulation of 4.20 V ±0.75%, optimized for standard single-cell Li-ion batteries. This value is fixed and cannot be adjusted externally - unlike variants such as MCP73833T-2VI/UN (4.35 V) or MCP73833T-3VI/UN (4.40 V). The MCP73833T-NVI/UN achieves this accuracy without external resistive dividers, ensuring consistent termination across temperature and time.

Does MCP73833T-NVI/UN support thermistor-based temperature monitoring?

Yes, the MCP73833T-NVI/UN includes a dedicated THERM pin with a precision 50 µA ±6% current source for biasing standard 10 kΩ NTC thermistors. It compares the resulting voltage against factory-set thresholds (1.23 V upper, 0.25 V lower) and suspends charging immediately upon out-of-range detection. This enables full JEITA-compliant thermal qualification - a feature absent in basic chargers like TP4056 and critical for medical or industrial certifications.

How does the PG (Power Good) output function on MCP73833T-NVI/UN?

The PG output on MCP73833T-NVI/UN is a pseudo-open-drain signal that sinks current only and must be pulled up to VDD. It asserts LOW when VDD exceeds the UVLO start threshold (3.55 V typ) and remains above the battery voltage (VDD > VBAT), indicating valid input power presence. This allows host systems to sequence power-up or disable loads safely - a capability not found in MCP73834 variants (which replace PG with TE) or competing ICs like BQ24075 (no PG output).

What package type and thermal performance does MCP73833T-NVI/UN offer?

The MCP73833T-NVI/UN is supplied in a 10-lead DFN package (3 mm × 3 mm) with an exposed thermal pad (EP) internally connected to VSS. On a standard 4-layer PCB, its junction-to-ambient thermal resistance is 41°C/W - significantly lower than the MSOP-10 variant (113°C/W). This enables sustained 1 A charging without heatsinking or airflow, making it ideal for ultra-thin portable devices where thermal management is constrained.

Can MCP73833T-NVI/UN operate without a battery connected?

Yes, the MCP73833T-NVI/UN supports System Test (LDO) mode: when THERM is driven above (VDD − 100 mV) and no battery is present, it regulates VBAT at the factory-set 4.20 V with current limited to the programmed I_REG. This allows powering downstream circuitry during production test or debug without a battery - a feature confirmed in Section 5.1.4.1 of the DS22005B datasheet and distinct from basic chargers lacking LDO functionality.

MCP73833T-NVI/UN Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

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:: 4.35V

Voltage - Supply (Max):: 6V

Interface:: -

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 10-MSOP

MCP73833T-NVI/UN FAQ

1.How can I place an order for MCP73833T-NVI/UN through Aetrix?

Please submit a Request for Quotation (RFQ) for MCP73833T-NVI/UN 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-NVI/UN reliable?

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

3.What payment methods are accepted for MCP73833T-NVI/UN?

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

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4.How is shipping managed for MCP73833T-NVI/UN?

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

Once your MCP73833T-NVI/UN 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-NVI/UN?

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

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

All MCP73833T-NVI/UN 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-NVI/UN meets industry standards.

7.What is the process for return or replacement of MCP73833T-NVI/UN?

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

Return procedure for MCP73833T-NVI/UN:

1.Submit a request within 90 days.

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

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