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

Analog Devices Inc. LTC4162EUFD-L41M#PBF

Name: LTC4162EUFD-L41M#PBF
Brand: Analog Devices Inc.
SKU: LTC4162EUFD-L41M#PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LTC4162EUFD-L41M#PBF

Manufacturer:: Analog Devices Inc.

Category:: Battery Management

Package:: 28-WFQFN Exposed Pad

Datasheet:: LTC4162EUFD-L41M#PBF.pdf

Description:: IC BATT MON LI-ION 1-8CELL 28QFN

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Product details

Overview

LTC4162EUFD-L41M#PBF from Analog Devices is a 35V/3.2A synchronous step-down lithium-ion/polymer battery charger with PowerPath™ management and I²C telemetry. It supports 1–8-cell stacks, delivers up to 3.2A charge current, features MPPT for solar inputs, and enables instant-on operation under low-battery or no-battery conditions in rugged portable systems.

For engineers reviewing the LTC4162EUFD-L41M#PBF datasheet, LTC4162EUFD-L41M#PBF pinout, LTC4162EUFD-L41M#PBF application, or LTC4162EUFD-L41M#PBF equivalent, key selection criteria include fixed 4.1V per-cell charge voltage, integrated MPPT control, 16-bit telemetry accuracy for V_BAT/I_BAT/R_BAT/T_BAT, and thermal regulation with die temperature monitoring.

Technical Context

The LTC4162EUFD-L41M#PBF implements a constant-frequency (1.5MHz typical) synchronous buck topology with four independent regulation loops: battery voltage, charge current, input current, and input voltage. Its PowerPath architecture decouples V_OUT from battery voltage using external N-channel MOSFETs controlled by INFET and BATFET pins.

Telemetry is delivered via a 7-channel 16-bit ADC subsystem measuring V_BATSENS+, I_BAT, I_IN, V_IN, V_OUT, NTC voltage, and die temperature - all accessible over I²C with 0.5% full-scale accuracy on voltage measurements and ±0.15mV offset error on current sensing.

Key Specifications

Parameter	Value and Actual Design Meaning
Charge Voltage	Fixed 4.1V per cell - sets termination threshold for single- to 8-cell Li-ion/polymer stacks without I²C configuration.
Max Charge Current	3.2A - determined by external sense resistor (RSNSB) and servo voltage resolution of 0.25mV/LSB.
Input Voltage Range	4.5V to 35V - supports wall adapters, USB-C PD, backplanes, and solar panels with MPPT enabled.
Switching Frequency	1.5MHz typical (RT = 63.4kΩ) - enables compact magnetics and high efficiency across 1–8 cell counts.
Telemetry Resolution	16-bit ADC - provides 0.32µV/LSB resolution on I_BAT and 25mV/LSB on V_IN, enabling precise battery resistance (R_BAT) and state-of-charge estimation.
Thermal Protection	Dual thermal regulation - die temperature monitored with ±264.4°C offset and 0.0215°C/LSB resolution; thermal foldback starts at 70°C.
I²C Interface	Standard-mode (400kHz), 7-bit address 0b1101000 - supports register read/write for alerts, charge parameters, and real-time telemetry.

Pinout & Package

The LTC4162EUFD-L41M#PBF is housed in a thermally enhanced 28-pin 4mm × 5mm × 0.75mm QFN package with exposed AGND pad (Pin 29) requiring PCB soldering for thermal and electrical integrity. θ_JA = 43°C/W, θ_JC = 3.4°C/W.

Pin/Terminal	Circuit Role	Design Meaning
INFET (6)	Gate driver output	Controls external N-channel MOSFET between VIN and VOUT for input reverse blocking and PowerPath handover.
BATFET (22)	Gate driver output	Drives external N-channel MOSFET between battery and VOUT to isolate battery during ship mode or fault conditions.
CSP/CSN (21/20)	Charge current sense	Differential inputs for RSNSB resistor - measures I_BAT with ±0.15mV offset error and 0.25mV/LSB resolution.
CLP/CLN (5/4)	Input current sense	Differential inputs for RSNSI resistor - regulates I_IN with 0.5mV/LSB resolution and prioritizes system load over charging.
BATSENS+ (19)	Battery voltage sense	Kelvin-connected positive battery terminal input - enables accurate per-cell voltage measurement and JEITA-compliant charging.
NTC/NTCBIAS (10/9)	Temperature sensing	Provides 1.2V bias and digitizes NTC thermistor voltage for battery temperature monitoring with β = 3490K support.
SCL/SDA (13/14)	I²C interface	Open-drain bidirectional bus lines referenced to DVCC - enable telemetry readback and parameter configuration without additional level shifters.
CELLS0/CELLS1 (17/18)	Cell count selection	Strap pins to INTVCC/VCC2P5/GND to configure 1–8 series cells - determines V_CHARGE range and telemetry scaling.

Key Features

Feature	Design Value
MPPT for solar inputs	Integrated algorithm adjusts input current limit to track maximum power point - eliminates need for external MPPT controller in solar-powered portable devices.
PowerPath™ topology	Independent control of INFET and BATFET enables seamless transition between input power and battery, allowing instant-on startup even with 0V battery.
JEITA temperature profiling	Configurable charge enable/disable thresholds per temperature zone - ensures safe charging across –40°C to 125°C ambient with NTC feedback.
Ship mode battery drain	≤1µA typical battery current when activated - extends shelf life of medical and industrial handhelds during storage.
Input undervoltage lockout	Differential VIN-to-BATSENS+ threshold (100–200mV hysteresis) - prevents charging from weak sources while maintaining system load priority.

Applications

Medical Instruments	USB-C Power Delivery
Use Scenario: Portable ultrasound or infusion pumps requiring reliable battery backup and regulatory-compliant thermal management. IC Role / Device Role / Timing Role: Primary battery charger and PowerPath manager - handles dual-input (AC adapter + battery) power routing with JEITA-compliant charging. Use Value: Enables FDA-grade thermal logging via I²C telemetry and reduces BOM count by integrating MPPT, telemetry, and protection in one IC.	Use Scenario: Docking stations or multi-port chargers negotiating variable USB-C PD voltages (5–20V) while charging internal Li-ion packs. IC Role / Device Role / Timing Role: Input-voltage-flexible battery charger - accepts negotiated PD voltage as VIN and regulates charge current to match source capability. Use Value: Maintains full 3.2A charge rate across 9–20V PD profiles using input current limiting and dynamic power path allocation.
Industrial Handhelds	Ruggedized Notebooks
Use Scenario: Barcode scanners or field meters operating in extreme temperatures (-40°C to 85°C) with long shelf life requirements. IC Role / Device Role / Timing Role: Low-quiescent battery manager - provides ship mode (≤1µA drain), wide-temp telemetry, and robust overvoltage/undervoltage protection. Use Value: Eliminates need for external fuel gauge or thermal monitor ICs; supports battery resistance tracking for state-of-health estimation.	Use Scenario: Military-spec notebooks requiring hot-swap battery operation and simultaneous charging/running from AC adapter. IC Role / Device Role / Timing Role: Dual-path power controller - isolates battery during AC operation using BATFET, then seamlessly engages it during AC loss. Use Value: Achieves zero-interruption runtime transition and enables battery calibration cycles without system shutdown.

Medical Instruments

USB-C Power Delivery

Use Scenario: Portable ultrasound or infusion pumps requiring reliable battery backup and regulatory-compliant thermal management.

IC Role / Device Role / Timing Role: Primary battery charger and PowerPath manager - handles dual-input (AC adapter + battery) power routing with JEITA-compliant charging.

Use Value: Enables FDA-grade thermal logging via I²C telemetry and reduces BOM count by integrating MPPT, telemetry, and protection in one IC.

Use Scenario: Docking stations or multi-port chargers negotiating variable USB-C PD voltages (5–20V) while charging internal Li-ion packs.

IC Role / Device Role / Timing Role: Input-voltage-flexible battery charger - accepts negotiated PD voltage as VIN and regulates charge current to match source capability.

Use Value: Maintains full 3.2A charge rate across 9–20V PD profiles using input current limiting and dynamic power path allocation.

Industrial Handhelds

Ruggedized Notebooks

Use Scenario: Barcode scanners or field meters operating in extreme temperatures (-40°C to 85°C) with long shelf life requirements.

IC Role / Device Role / Timing Role: Low-quiescent battery manager - provides ship mode (≤1µA drain), wide-temp telemetry, and robust overvoltage/undervoltage protection.

Use Value: Eliminates need for external fuel gauge or thermal monitor ICs; supports battery resistance tracking for state-of-health estimation.

Use Scenario: Military-spec notebooks requiring hot-swap battery operation and simultaneous charging/running from AC adapter.

IC Role / Device Role / Timing Role: Dual-path power controller - isolates battery during AC operation using BATFET, then seamlessly engages it during AC loss.

Use Value: Achieves zero-interruption runtime transition and enables battery calibration cycles without system shutdown.

Equivalent & Alternatives

The following parts are listed as comparable options for similar battery charger applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BQ25792RTWR	4.2V fixed per-cell charge voltage; no MPPT; 3.5A max charge; 12-bit telemetry only	Lacks solar MPPT and high-resolution telemetry - suitable for AC-only or USB-powered designs without battery health monitoring	Select if cost sensitivity outweighs MPPT and precision telemetry needs; requires external thermal monitoring for JEITA compliance
MAX77751EWW+T	4.1V fixed per-cell; 3.0A max charge; includes integrated 5V boost for USB OTG; no MPPT	Offers bidirectional power delivery but omits solar optimization and has lower charge current headroom	Prefer for USB-C DRP applications needing VBUS sourcing; not recommended for solar-harvesting or high-current (>3A) charging

Compared with BQ25792RTWR and MAX77751EWW+T, the LTC4162EUFD-L41M#PBF uniquely combines fixed 4.1V/cell charging, integrated MPPT, 16-bit telemetry, and PowerPath™ with 3.2A capability - making it optimal for solar-recharged, thermally constrained, and battery-health-aware industrial and medical platforms.

Availability

LTC4162EUFD-L41M#PBF is available at Aetrix Electronics and suitable for medical instruments, USB-C power delivery systems, and ruggedized notebooks requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for LTC4162EUFD-L41M#PBF 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

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC4162 product line delivers highly integrated battery management solutions with embedded telemetry, MPPT, and PowerPath™ control - designed specifically for portable, solar-recharged, and thermally demanding applications where reliability and measurement fidelity are critical.

FAQ

What is the fixed charge voltage setting of the LTC4162EUFD-L41M#PBF?

The LTC4162EUFD-L41M#PBF is factory-configured for a fixed 4.1V per-cell charge voltage, supporting 1–8 series Li-ion/polymer cells without I²C programming. This setting is hard-coded in the "L41M" variant and cannot be adjusted via registers - unlike the I²C-adjustable LTC4162EUFD-LAD#PBF. The LTC4162EUFD-L41M#PBF maintains this voltage across temperature and load with ±0.5% accuracy.

Does the LTC4162EUFD-L41M#PBF support Maximum Power Point Tracking (MPPT)?

Yes, the LTC4162EUFD-L41M#PBF includes integrated MPPT functionality activated by default in the "M" suffix variants. It dynamically adjusts input current limit to maximize harvested power from solar panels or other variable-impedance sources. MPPT operates independently of charge voltage settings and is confirmed in the Order Information table and Applications Information section of the datasheet.

How does the PowerPath™ architecture in the LTC4162EUFD-L41M#PBF enable instant-on operation?

The LTC4162EUFD-L41M#PBF uses separate INFET and BATFET gate drivers to decouple V_OUT from battery voltage. When VIN is present, INFET turns on to power V_OUT directly - allowing the system to start instantly even with a fully discharged or missing battery. This behavior is inherent to the PowerPath™ topology and is verified in the Typical Application schematic and Operation section.

What telemetry data can be read from the LTC4162EUFD-L41M#PBF over I²C?

The LTC4162EUFD-L41M#PBF provides 16-bit telemetry for seven parameters over I²C: battery voltage (V_BATSENS+), battery current (I_BAT), input current (I_IN), input voltage (V_IN), output voltage (V_OUT), NTC thermistor voltage, and die temperature (T_DIE). All values are accessible via dedicated registers and support real-time monitoring of battery resistance (R_BAT) and state-of-health.

What package type and thermal characteristics does the LTC4162EUFD-L41M#PBF use?

The LTC4162EUFD-L41M#PBF uses a 28-pin 4mm × 5mm × 0.75mm QFN package (UFD) with exposed AGND pad (Pin 29). Its thermal metrics are θ_JA = 43°C/W and θ_JC = 3.4°C/W. The datasheet mandates soldering the exposed pad to PCB for thermal performance and specifies minimum copper pour area per JEDEC standards.

LTC4162EUFD-L41M#PBF Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: PowerPath™

Package/Case:: 28-WFQFN Exposed Pad

Packaging:: Tube

Product Status:: Active

Function:: Battery Monitor

Battery Chemistry:: Lithium Ion/Polymer

Number of Cells:: 1 ~ 8

Fault Protection:: Over Current, Over Temperature, Over Voltage

Interface:: I2C

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 28-QFN (4x5)

LTC4162EUFD-L41M#PBF FAQ

1.How can I place an order for LTC4162EUFD-L41M#PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for LTC4162EUFD-L41M#PBF 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 LTC4162EUFD-L41M#PBF reliable?

The price and inventory of LTC4162EUFD-L41M#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4162EUFD-L41M#PBF is usually 5 days.

3.What payment methods are accepted for LTC4162EUFD-L41M#PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4162EUFD-L41M#PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LTC4162EUFD-L41M#PBF?

LTC4162EUFD-L41M#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LTC4162EUFD-L41M#PBF 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 LTC4162EUFD-L41M#PBF?

For technical support, including LTC4162EUFD-L41M#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4162EUFD-L41M#PBF requirements.

6.How does Aetrix verify that LTC4162EUFD-L41M#PBF is sourced from the original manufacturer or authorized distributors?

All LTC4162EUFD-L41M#PBF 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 LTC4162EUFD-L41M#PBF meets industry standards.

7.What is the process for return or replacement of LTC4162EUFD-L41M#PBF?

All LTC4162EUFD-L41M#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4162EUFD-L41M#PBF, 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 LTC4162EUFD-L41M#PBF part is unused and in its original packaging.

Return procedure for LTC4162EUFD-L41M#PBF:

1.Submit a request within 90 days.

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

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