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

Microchip Technology MCP73837T-NVI/MF

Name: MCP73837T-NVI/MF
Brand: Microchip Technology
SKU: MCP73837T-NVI/MF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MCP73837T-NVI/MF

Manufacturer:: Microchip Technology

Category:: Battery Chargers

Package:: 10-VFDFN Exposed Pad

Datasheet:: MCP73837T-NVI/MF.pdf

Description:: IC BATT CHG LI-ION 1CELL 10DFN

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Product details

Overview

MCP73837T-NVI/MF from Microchip Technology is a fully integrated linear Li-ion/Li-polymer battery charge management controller with autonomous AC adapter or USB port source selection, ±0.5% voltage regulation accuracy, 4.20 V fixed charge voltage, thermal regulation, and dual open-drain status outputs - used in portable medical devices and ultra-mobile consumer electronics requiring dual-source charging and battery temperature monitoring.

For engineers reviewing the MCP73837T-NVI/MF datasheet, MCP73837T-NVI/MF pinout, MCP73837T-NVI/MF application, or MCP73837T-NVI/MF equivalent, key selection considerations include its 10-lead 3 mm × 3 mm DFN package, programmable AC charge current (15–1000 mA), USB-selectable 100/500 mA charge rates, integrated reverse discharge protection, and PG output for power-good indication.

Technical Context

The MCP73837T-NVI/MF implements a CC/CV charge algorithm with factory-set 4.20 V regulation, preconditioning for deeply depleted cells, and automatic recharge at 94% of VREG. It uses internal sense-FETs (350 mΩ typical R_DS(ON)) and integrates UVLO with separate thresholds for USB (3.45 V start) and AC (4.15 V start) inputs.

Thermal regulation dynamically reduces charge current above die temperature thresholds (150 °C shutdown, 10 °C hysteresis), while the THERM pin supports NTC thermistor biasing via a 50 µA current source. The device includes autonomous power-source arbitration: AC adapter dominates when both VAC and VUSB are present.

Key Specifications

Parameter	Value and Actual Design Meaning
Charge Voltage	4.20 V ±0.5% - tightly regulated for standard single-cell Li-ion chemistry compliance
AC Charge Current Range	15–1000 mA - set by PROG1 resistor (1–10 kΩ), enabling flexible system-level current scaling
USB Charge Current Options	100 mA (low-power USB) or 500 mA (high-power USB) - selected via PROG2 logic level
Operating Temp Range	−40°C to +85°C - qualified for industrial and portable medical device environments
Package	10-lead 3 mm × 3 mm DFN with exposed thermal pad - optimized for compact PCB layouts and thermal dissipation
UVLO Thresholds	V_START = 3.45 V (USB), 4.15 V (AC); hysteresis = 75 mV / 55 mV - prevents oscillation during input brownout
Thermal Shutdown	150°C with 10°C hysteresis - protects IC and battery under high ambient or high-current conditions

Pinout & Package

Package: 10-lead 3 mm × 3 mm DFN with exposed thermal pad (EP), internally connected to VSS. EP must be soldered to PCB ground plane for thermal and electrical integrity.

Pin/Terminal	Circuit Role	Design Meaning
VAC	AC adapter supply input	Accepts 4.3–6 V; dominates over VUSB when both present; requires ≥4.7 µF bypass to VSS
VUSB	USB port supply input	Accepts 4.3–6 V; enables 100/500 mA USB charging; requires ≥1 µF bypass to VSS
STAT1	Open-drain charge status output	Active-low during charging; high-Z at completion; drives LED or microcontroller interrupt
STAT2	Open-drain charge status output	Active-low at charge completion; high-Z during charging; complements STAT1 for dual-indicator designs
VSS	Ground reference	Common return for battery, inputs, and EP; must connect to exposed thermal pad
PROG1	AC charge current programming input	Resistor-to-VSS sets I_REG; floating disables charge; >70 kΩ forces shutdown
PROG2	USB charge current select input	Logic low = 100 mA, high = 500 mA; also sets USB precondition/termination ratios
PG	Power-good status output	Open-drain active-low when valid input power detected on VAC or VUSB - unique to MCP73837 variant
THERM	Battery temperature monitor	Biased with 50 µA current source; interfaces to NTC thermistor for JEITA-compliant thermal charging control
VBAT	Battery positive connection	Direct connection to Li-ion cell anode; requires ≥1 µF capacitor for loop stability when battery disconnected

Key Features

Feature	Design Value
Autonomous dual-source selection	Eliminates external multiplexing circuitry; AC adapter takes priority over USB without host intervention
Integrated reverse discharge protection	Blocks battery-to-input leakage (<0.55 µA in shutdown), preserving battery life when no input power is present
Programmable safety timer	Configurable 4/6/8-hour timeout prevents overcharge during CV phase - critical for unattended charging
LDO mode for system test	Enables VBAT output regulation independent of battery presence when THERM > VDD − 100 mV
Preconditioning enable/disable	Factory-configured threshold (66.5% of VREG) safely recovers deeply discharged cells before fast charge

Applications

Smartphones & PDAs	Portable Medical Devices
Use Scenario: Compact handheld device with dual-input charging (USB for field use, AC for docked operation) and strict battery safety requirements. IC Role / Device Role / Timing Role: MCP73837T-NVI/MF manages full CC/CV charge cycle, monitors battery temperature via NTC, and signals charge status via STAT1/STAT2. Use Value: Enables safe, autonomous charging without MCU supervision; ±0.5% voltage accuracy ensures optimal Li-ion cell longevity.	Use Scenario: Battery-powered glucose meter or pulse oximeter requiring reliable, low-risk charging in clinical and home settings. IC Role / Device Role / Timing Role: MCP73837T-NVI/MF provides JEITA-compliant thermal regulation, automatic recharge, and UVLO-protected input arbitration. Use Value: Prevents unsafe charging outside temperature limits; integrated reverse discharge protection extends shelf life during storage.
Ultra-Mobile Devices (UMD)	Digital Cameras
Use Scenario: Sub-7-inch tablet or detachable keyboard device with space-constrained layout and dual-input flexibility. IC Role / Device Role / Timing Role: MCP73837T-NVI/MF delivers up to 1 A AC charge current, supports USB 2.0 current limits, and reports power-good status via PG pin. Use Value: Reduces BOM count by integrating pass FETs, current sense, and source selection - critical for miniaturized designs.	Use Scenario: DSLR or mirrorless camera with removable Li-ion battery pack and rapid recharge capability via AC adapter or computer USB. IC Role / Device Role / Timing Role: MCP73837T-NVI/MF executes preconditioning for cold batteries, regulates 4.20 V precisely, and terminates charge at 5% I_REG. Use Value: Ensures full capacity recovery after deep discharge; thermal regulation avoids overheating during high-current AC charging.

Smartphones & PDAs

Portable Medical Devices

Use Scenario: Compact handheld device with dual-input charging (USB for field use, AC for docked operation) and strict battery safety requirements.

IC Role / Device Role / Timing Role: MCP73837T-NVI/MF manages full CC/CV charge cycle, monitors battery temperature via NTC, and signals charge status via STAT1/STAT2.

Use Value: Enables safe, autonomous charging without MCU supervision; ±0.5% voltage accuracy ensures optimal Li-ion cell longevity.

Use Scenario: Battery-powered glucose meter or pulse oximeter requiring reliable, low-risk charging in clinical and home settings.

IC Role / Device Role / Timing Role: MCP73837T-NVI/MF provides JEITA-compliant thermal regulation, automatic recharge, and UVLO-protected input arbitration.

Use Value: Prevents unsafe charging outside temperature limits; integrated reverse discharge protection extends shelf life during storage.

Ultra-Mobile Devices (UMD)

Digital Cameras

Use Scenario: Sub-7-inch tablet or detachable keyboard device with space-constrained layout and dual-input flexibility.

IC Role / Device Role / Timing Role: MCP73837T-NVI/MF delivers up to 1 A AC charge current, supports USB 2.0 current limits, and reports power-good status via PG pin.

Use Value: Reduces BOM count by integrating pass FETs, current sense, and source selection - critical for miniaturized designs.

Use Scenario: DSLR or mirrorless camera with removable Li-ion battery pack and rapid recharge capability via AC adapter or computer USB.

IC Role / Device Role / Timing Role: MCP73837T-NVI/MF executes preconditioning for cold batteries, regulates 4.20 V precisely, and terminates charge at 5% I_REG.

Use Value: Ensures full capacity recovery after deep discharge; thermal regulation avoids overheating during high-current AC charging.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Li-ion linear charger applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP73831T-2ACI/OT	Single-input (USB only), 4.20 V, 500 mA max, SOT-23-5 package	No AC adapter support; lacks PG, STAT2, THERM, and PROG1 programmability	Select when only USB charging is required and board space is extremely limited
BQ24075RGTR	4.20 V, 1.5 A max, integrated LDO, different pinout, no PG output	Higher current capability but no power-good indicator; requires external reverse-blocking MOSFET	Select when higher charge current and integrated LDO are needed, and PG signal is not required

Compared with MCP73831T-2ACI/OT and BQ24075RGTR, the MCP73837T-NVI/MF uniquely combines dual-input autonomy, PG output, thermal monitoring, and precise 4.20 V regulation in a 3×3 mm DFN - making it optimal for space-constrained, safety-critical dual-source applications.

Availability

MCP73837T-NVI/MF is available at Aetrix Electronics and suitable for smartphones, portable medical devices, and ultra-mobile devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MCP73837T-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 Inc. is a leading provider of microcontrollers, analog components, and battery management ICs, serving automotive, industrial, and consumer markets with high-reliability silicon solutions.

The MCP73837/8 product line was designed specifically for autonomous, dual-input Li-ion charging in space-constrained portable electronics - emphasizing integration, thermal safety, and JEITA-compliant battery protection.

FAQ

What is the fixed charge voltage of the MCP73837T-NVI/MF?

The MCP73837T-NVI/MF has a factory-set constant-voltage regulation point of 4.20 V with ±0.5% accuracy across −40°C to +85°C. This value is fixed and not user-adjustable; it complies with standard single-cell Li-ion battery specifications and eliminates the need for external voltage-setting resistors.

Does the MCP73837T-NVI/MF support both AC adapter and USB charging simultaneously?

Yes, the MCP73837T-NVI/MF autonomously selects between AC adapter (VAC) and USB (VUSB) inputs. When both are present, VAC takes priority and sets the charge current via PROG1; VUSB is disabled as a power source but remains monitored for fallback if VAC is removed.

How does the MCP73837T-NVI/MF implement battery temperature monitoring?

The MCP73837T-NVI/MF uses its THERM pin to bias a standard 10 kΩ NTC thermistor with a 50 µA current source. Internal comparators detect upper (1.23 V) and lower (0.25 V) trip thresholds, enabling JEITA-compliant charge suspension outside safe temperature ranges - all without external op-amps or ADCs.

What is the function of the PG pin on the MCP73837T-NVI/MF?

The PG (Power-Good) pin on the MCP73837T-NVI/MF is an open-drain output that goes low when either VAC or VUSB supplies valid input power above their respective UVLO thresholds. It provides immediate system-level power-status feedback - a feature absent in the MCP73838 variant and many competing chargers.

Can the MCP73837T-NVI/MF be used without a microcontroller?

Yes, the MCP73837T-NVI/MF operates autonomously: it initiates charging upon valid input detection, executes preconditioning, transitions through CC/CV phases, terminates based on current ratio, and signals status via STAT1, STAT2, and PG. No firmware or host control is required for basic operation.

MCP73837T-NVI/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:: -

Fault Protection:: Over Voltage

Charge Current - Max:: 1.1A

Battery Pack Voltage:: 4.35V

Voltage - Supply (Max):: 6V

Interface:: USB

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

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

MCP73837T-NVI/MF FAQ

1.How can I place an order for MCP73837T-NVI/MF through Aetrix?

Please submit a Request for Quotation (RFQ) for MCP73837T-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 MCP73837T-NVI/MF reliable?

The price and inventory of MCP73837T-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 MCP73837T-NVI/MF is usually 5 days.

3.What payment methods are accepted for MCP73837T-NVI/MF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73837T-NVI/MF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MCP73837T-NVI/MF?

MCP73837T-NVI/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MCP73837T-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 MCP73837T-NVI/MF?

For technical support, including MCP73837T-NVI/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73837T-NVI/MF requirements.

6.How does Aetrix verify that MCP73837T-NVI/MF is sourced from the original manufacturer or authorized distributors?

All MCP73837T-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 MCP73837T-NVI/MF meets industry standards.

7.What is the process for return or replacement of MCP73837T-NVI/MF?

All MCP73837T-NVI/MF units undergo pre-shipment inspection (PSI). If there is an issue with MCP73837T-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 MCP73837T-NVI/MF part is unused and in its original packaging.

Return procedure for MCP73837T-NVI/MF:

1.Submit a request within 90 days.

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

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