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

Microchip Technology MCP73834-NVI/MF

Name: MCP73834-NVI/MF
Brand: Microchip Technology
SKU: MCP73834-NVI/MF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MCP73834-NVI/MF

Manufacturer:: Microchip Technology

Category:: Battery Chargers

Package:: 10-VFDFN Exposed Pad

Datasheet:: MCP73834-NVI/MF.pdf

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

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Product details

Overview

MCP73834-NVI/MF from Microchip Technology is a stand-alone linear Li-ion/Li-polymer battery charge management controller in a 10-lead DFN-10 (3 mm × 3 mm) package. It delivers constant-current/constant-voltage charging up to 1 A, supports four factory-set regulation voltages (4.20 V, 4.35 V, 4.40 V, or 4.50 V ±0.75%), integrates thermal regulation and reverse discharge protection, and is optimized for USB-powered portable devices such as Bluetooth headsets and digital cameras.

For engineers reviewing the MCP73834-NVI/MF datasheet, MCP73834-NVI/MF pinout, MCP73834-NVI/MF application, or MCP73834-NVI/MF equivalent, key selection criteria include its timer-enable (TE) input for dynamic safety timer control, thermistor-based temperature monitoring with 50 µA bias current, and programmable preconditioning and termination thresholds - all critical for safe, compliant single-cell Li-ion charging in space-constrained designs.

Technical Context

The MCP73834-NVI/MF implements a full linear charging algorithm with integrated P-channel MOSFET pass transistor (R_DS(on) = 300 mΩ), internal current sense, and automatic power-down when input is removed. Its TE pin enables or disables the internal safety timer - distinguishing it from the MCP73833 variant - allowing system-level control over charge duration during concurrent battery/system powering.

Thermal regulation dynamically scales charge current above ~105°C to prevent overheating, while dual voltage comparators on the THERM pin monitor NTC thermistors using factory-trimmed 1.23 V and 0.25 V thresholds. Charge termination uses a ratiometric current threshold (e.g., 5% of I_REG) with 1.3 ms filter time to reject transients.

Key Specifications

Parameter	Value and Actual Design Meaning
Regulation Voltage	Factory-set to 4.20 V, 4.35 V, 4.40 V, or 4.50 V ±0.75%; determines final cell voltage for optimal capacity/safety trade-off per chemistry.
Max Charge Current	1 A (programmable via PROG resistor); enables fast charging of 1–2 Ah batteries in under 2 hours with proper thermal design.
Thermal Regulation	Active current limiting above ~105°C; maintains reliability without external thermal sensors or layout changes.
Timer Enable Input	TE pin accepts 1.8 V logic; disables internal safety timer during system load operation to prevent premature termination.
THERM Bias Current	50 µA ±6%; provides stable excitation for standard 10 kΩ NTC thermistors across temperature and supply variation.
UVLO Threshold	V_START = 3.55 V ±0.15 V; ensures reliable startup only when input meets minimum USB or adapter requirements.
Operating Temp	−40°C to +85°C ambient; validated for industrial and consumer portable equipment environments.

Pinout & Package

Package: DFN-10 (3 mm × 3 mm) with exposed thermal pad (EP) electrically tied 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 IC and charges battery; bypassed with ≥1 µF to VSS.
STAT1, STAT2 (Pins 3,4)	Open-drain charge status outputs	Drive LEDs or microcontroller GPIOs; encode charge state (e.g., STAT1=LOW/STAT2=Hi-Z = fast charge).
VSS (Pin 5)	0 V reference	Common return for battery negative, input supply, and EP; must be low-impedance ground 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.
TE (Pin 7)	Timer enable input	Low = enable safety timer; high = disable; allows host control during system-busy charging phases.
THERM (Pin 8)	Thermistor input	50 µA bias source; compares voltage to 1.23 V / 0.25 V thresholds to halt charge on over/under-temp.
VBAT (Pins 9,10)	Battery charge control output	Drain of internal P-MOSFET; connects directly to battery positive; bypassed with ≥4.7 µF for >250 mA stability.
EP (Pin 11)	Exposed thermal pad	Internally connected to VSS; mandatory PCB thermal relief for θ_JA = 41°C/W performance.

Key Features

Feature	Design Value
Integrated P-MOSFET pass transistor	Eliminates external high-side switch and reduces BOM count; R_DS(on) = 300 mΩ enables <150 mW conduction loss at 1 A.
Selectable regulation voltage options	Four factory-trimmed V_REG values support evolving Li-ion chemistries (e.g., 4.35 V for high-density cells) without firmware change.
Programmable preconditioning & termination	Current ratios (e.g., 10% preconditioning, 5% termination) scale with I_REG, enabling precise control over deep-charge recovery and end-of-charge accuracy.
Automatic recharge with hysteresis	Recharges when V_BAT drops to 94–96.5% of V_REG; prevents battery self-discharge drift while avoiding unnecessary cycling.
System Test (LDO) mode	Enables VBAT output regulation without battery present; supports system validation and battery-less operation using same V_REG setting.

Applications

USB-Powered Portable Devices	Medical Wearables
Use Scenario: Charging compact devices like Bluetooth headsets or digital cameras directly from USB ports with strict 500 mA/900 mA current limits. IC Role / Device Role / Timing Role: Stand-alone linear charger managing CC/CV profile, UVLO, and thermal foldback without MCU intervention. Use Value: Complies with USB power bus specifications while delivering up to 1 A charge current through programmable PROG resistor and thermal regulation.	Use Scenario: Powering and recharging small medical sensors worn on-body where battery safety and temperature monitoring are critical. IC Role / Device Role / Timing Role: Battery charge controller with NTC-based thermal qualification and automatic fault suspension during out-of-range conditions. Use Value: Halts charging if thermistor voltage exceeds 1.23 V or falls below 0.25 V - ensuring compliance with IEC 62368-1 thermal safety requirements.
Industrial Handheld Terminals	Smart Home Sensors
Use Scenario: Recharging ruggedized handheld scanners operating in wide ambient temperatures (−40°C to +85°C). IC Role / Device Role / Timing Role: Linear charge manager with −40°C to +85°C guaranteed operation, UVLO hysteresis, and reverse discharge protection. Use Value: Maintains <2 µA reverse leakage even when VDD < VBAT, preserving battery life during storage or field downtime.	Use Scenario: Enabling long-life battery operation in wireless door/window sensors with infrequent charging cycles. IC Role / Device Role / Timing Role: Low-quiescent charger with automatic recharge and 100 µA standby current to minimize parasitic drain. Use Value: Extends battery runtime by >20% vs. non-recharge controllers due to precise 94–96.5% V_REG recharge threshold and 100 µA shutdown current.

USB-Powered Portable Devices

Medical Wearables

Use Scenario: Charging compact devices like Bluetooth headsets or digital cameras directly from USB ports with strict 500 mA/900 mA current limits.

IC Role / Device Role / Timing Role: Stand-alone linear charger managing CC/CV profile, UVLO, and thermal foldback without MCU intervention.

Use Value: Complies with USB power bus specifications while delivering up to 1 A charge current through programmable PROG resistor and thermal regulation.

Use Scenario: Powering and recharging small medical sensors worn on-body where battery safety and temperature monitoring are critical.

IC Role / Device Role / Timing Role: Battery charge controller with NTC-based thermal qualification and automatic fault suspension during out-of-range conditions.

Use Value: Halts charging if thermistor voltage exceeds 1.23 V or falls below 0.25 V - ensuring compliance with IEC 62368-1 thermal safety requirements.

Industrial Handheld Terminals

Smart Home Sensors

Use Scenario: Recharging ruggedized handheld scanners operating in wide ambient temperatures (−40°C to +85°C).

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

Use Value: Maintains <2 µA reverse leakage even when VDD < VBAT, preserving battery life during storage or field downtime.

Use Scenario: Enabling long-life battery operation in wireless door/window sensors with infrequent charging cycles.

IC Role / Device Role / Timing Role: Low-quiescent charger with automatic recharge and 100 µA standby current to minimize parasitic drain.

Use Value: Extends battery runtime by >20% vs. non-recharge controllers due to precise 94–96.5% V_REG recharge threshold and 100 µA shutdown current.

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
MCP73833T-F002I/MN	Lacks TE pin; includes PG output instead; same DFN-10 package and 4.20 V V_REG.	Suitable for simpler systems requiring power-good signaling but no host-controlled timer disable.	Select when safety timer must always run and no system-level override is needed.
BQ24075RGTR	TI part with 1 A max current, 4.2 V V_REG, no TE pin, but adds V_IN DPM and higher 28 V abs max input.	Better suited for adapter-input systems with variable/unregulated sources; lacks thermistor interface.	Choose for higher input voltage tolerance and DPM functionality, but requires external thermistor circuitry.

Compared with MCP73833T-F002I/MN and BQ24075RGTR, the MCP73834-NVI/MF uniquely supports host-controlled timer disable via TE pin - essential for applications where the battery simultaneously powers a system load during charging - while retaining integrated thermistor monitoring and factory-set multi-voltage options not found in the BQ24075RGTR.

Availability

MCP73834-NVI/MF 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, guaranteed −40°C to +85°C operation, and integrated thermal safety.

Supply support for MCP73834-NVI/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, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.

The MCP73833/4 product line delivers highly integrated, space-efficient linear Li-ion charge controllers designed specifically for cost-sensitive, size-constrained portable electronics needing robust safety features and minimal external components.

FAQ

What is the function of the TE pin on the MCP73834-NVI/MF?

The TE (Timer Enable) pin on the MCP73834-NVI/MF is a logic input that controls the internal safety timer: a low signal enables the timer, while a high signal disables it. This allows the host system to suspend timer expiration during concurrent battery charging and system load operation - a capability absent in the MCP73833 variant. The TE pin is compatible with 1.8 V logic levels and is exclusive to the MCP73834-NVI/MF among the MCP73833/4 family.

How does the MCP73834-NVI/MF handle battery temperature monitoring?

The MCP73834-NVI/MF monitors battery temperature via the THERM pin, which sources a precise 50 µA current into an external NTC thermistor. It compares the resulting voltage against factory-trimmed thresholds of 1.23 V (upper) and 0.25 V (lower). If the voltage falls outside this range during charging, the MCP73834-NVI/MF immediately suspends charge, holds the timer value, and asserts Hi-Z on STAT1/STAT2. This behavior is fully integrated and requires no external ADC or firmware.

Can the MCP73834-NVI/MF be used without a battery connected?

Yes - the MCP73834-NVI/MF supports System Test (LDO) mode. When the THERM pin is driven above (VDD − 100 mV) and no battery is present on VBAT, the device regulates VBAT to its factory-set V_REG (e.g., 4.20 V) and supplies up to the programmed I_REG current. This mode enables system validation, battery-less prototyping, and auxiliary power delivery, with stability ensured by ≥4.7 µF output capacitance for loads >250 mA.

What is the maximum charge current supported by the MCP73834-NVI/MF and how is it set?

The MCP73834-NVI/MF supports a maximum charge current of 1 A, set by connecting a resistor (R_PROG) between the PROG pin and VSS. Using the formula I_REG = 1000 V / R_PROG (with R_PROG in kΩ and I_REG in mA), a 1.0 kΩ resistor yields 1000 mA. The device also supports lower currents down to 100 mA (R_PROG = 10 kΩ), and preconditioning/termination currents scale proportionally with I_REG.

Does the MCP73834-NVI/MF provide reverse battery discharge protection?

Yes - the MCP73834-NVI/MF integrates reverse discharge protection. When input power (VDD) is removed or falls below VBAT, the internal P-MOSFET blocks current flow from the battery back into the input circuitry. In this condition, reverse leakage is guaranteed ≤2 µA across all operating conditions, including VDD < VSTOP and VDD < VBAT, preserving battery charge during storage or adapter disconnection.

MCP73834-NVI/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:: 4.35V

Voltage - Supply (Max):: 6V

Interface:: -

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

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

MCP73834-NVI/MF FAQ

1.How can I place an order for MCP73834-NVI/MF through Aetrix?

Please submit a Request for Quotation (RFQ) for MCP73834-NVI/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 MCP73834-NVI/MF reliable?

The price and inventory of MCP73834-NVI/MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP73834-NVI/MF is usually 5 days.

3.What payment methods are accepted for MCP73834-NVI/MF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73834-NVI/MF transactions.

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4.How is shipping managed for MCP73834-NVI/MF?

MCP73834-NVI/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MCP73834-NVI/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 MCP73834-NVI/MF?

For technical support, including MCP73834-NVI/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73834-NVI/MF requirements.

6.How does Aetrix verify that MCP73834-NVI/MF is sourced from the original manufacturer or authorized distributors?

All MCP73834-NVI/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 MCP73834-NVI/MF meets industry standards.

7.What is the process for return or replacement of MCP73834-NVI/MF?

All MCP73834-NVI/MF units undergo pre-shipment inspection (PSI). If there is an issue with MCP73834-NVI/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 MCP73834-NVI/MF part is unused and in its original packaging.

Return procedure for MCP73834-NVI/MF:

1.Submit a request within 90 days.

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

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