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

Analog Devices Inc. LTC4162EUFD-L42M#PBF

Name: LTC4162EUFD-L42M#PBF
Brand: Analog Devices Inc.
SKU: LTC4162EUFD-L42M#PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LTC4162EUFD-L42M#PBF

Manufacturer:: Analog Devices Inc.

Category:: Battery Management

Package:: 28-WFQFN Exposed Pad

Datasheet:: LTC4162EUFD-L42M#PBF.pdf

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

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Product details

Overview

LTC4162EUFD-L42M#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 conditions in ruggedized notebooks and medical instruments.

For engineers reviewing the LTC4162EUFD-L42M#PBF datasheet, LTC4162EUFD-L42M#PBF pinout, LTC4162EUFD-L42M#PBF application, or LTC4162EUFD-L42M#PBF equivalent, key selection criteria include fixed 4.2V per-cell charge voltage, integrated MPPT control, 16-bit telemetry resolution for V_BAT/I_BAT/R_BAT/T_BAT, and thermal regulation with die temperature monitoring.

Technical Context

The LTC4162EUFD-L42M#PBF implements a constant-frequency (1.4–1.6 MHz) 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 handled by a 16-bit ADC subsystem measuring V_BATSENS+, I_BAT, I_IN, V_IN, V_OUT, T_DIE, T_BAT (via NTC), and battery series resistance (BSR), all accessible via I²C at address 0b1101000. MPPT is enabled and configured through dedicated registers for solar panel optimization.

Key Specifications

Parameter	Value and Actual Design Meaning
Charge Voltage	Fixed 4.2V per cell - sets termination threshold for single- or multi-cell Li-ion/polymer batteries without I²C configuration.
Max Charge Current	3.2A - determined by external sense resistor RSNSB and servo voltage accuracy (±0.25mV offset error).
Input Voltage Range	4.5V to 35V - supports wall adapters, USB-C PD, backplanes, and solar panels with MPPT active.
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 ≤10µV/LSB resolution on V_BATSENS+, ≤0.32µV/LSB on I_BAT, enabling precise state-of-charge and health estimation.
MPPT Support	Enabled - uses input current/voltage sweep algorithm to track global maximum power point on solar sources.
Operating Temp	–40°C to +125°C junction - qualified for industrial handhelds and medical equipment with extended thermal margin.

Pinout & Package

The LTC4162EUFD-L42M#PBF is housed in a thermally enhanced 28-pin 4mm × 5mm × 0.75mm QFN package with exposed pad (Pin 29) soldered to PCB ground for thermal and electrical integrity.

Pin/Terminal	Circuit Role	Design Meaning
INFET (6)	Gate driver output	Controls external N-MOSFET between VIN and VOUT for input reverse blocking and PowerPath handover.
BATFET (22)	Gate driver output	Drives external N-MOSFET between battery and VOUT to isolate battery during ship mode or fault.
CSP/CSN (21/20)	Charge current sense inputs	Differential pair measuring voltage across RSNSB to regulate I_BAT with ±0.25mV offset error.
CLP/CLN (5/4)	Input current sense inputs	Differential pair measuring voltage across RSNSI to regulate I_IN with ±0.2mV offset error.
BATSENS+ (19)	Battery voltage sense	Kelvin-connected positive battery terminal input for accurate per-cell voltage measurement and JEITA compliance.
NTC/NTCBIAS (10/9)	Thermal sensing interface	Provides 1.2V bias and digitizes NTC thermistor voltage for battery temperature monitoring with β = 3490K support.
SCL/SDA (13/14)	I²C serial interface	Open-drain bus operating at 400kHz with DVCC-referenced logic levels; supports register read/write and alert reporting.
CELLS0/CELLS1 (17/18)	Cell count configuration	Strap pins defining 1–8 series cells; logic states set via INTVCC/VCC2P5/GND per Table 5 in datasheet Rev A.

Key Features

Feature	Design Value
PowerPath™ Management	Enables simultaneous system power and battery charging with seamless handover and no brownout during battery insertion/removal.
Integrated MPPT Algorithm	Performs real-time solar panel voltage/current sweeps to maintain operation at maximum power point without external MCU intervention.
16-Bit Telemetry System	Measures V_BAT, I_BAT, R_BAT, T_BAT, T_DIE, V_IN, I_IN, V_OUT with <1mV/1mA absolute accuracy for predictive battery analytics.
JEITA Temperature Control	Automatically adjusts charge voltage/current based on NTC readings to comply with JEITA standards for safe Li-ion charging across –20°C to +60°C.
Thermal Regulation	Reduces charge current when die temperature exceeds 70°C (thermal start) and restores at 80°C (thermal end) to prevent thermal runaway.

Applications

Medical Instruments	USB-C Power Delivery
Use Scenario: Portable ultrasound and patient monitors requiring reliable battery runtime and fast recharge from variable-input sources including hospital wall adapters and mobile carts. IC Role / Device Role / Timing Role: Primary battery charger and PowerPath manager ensuring uninterrupted system operation during hot-swap battery replacement and AC-to-battery transition. Use Value: Instant-on capability allows device startup even with 0V battery; 4.2V fixed charge voltage matches standard Li-ion cathode chemistry used in medical packs.	Use Scenario: USB-C PD sink devices (e.g., docking stations) that accept 5–20V input and must charge internal multi-cell batteries while powering downstream ports. IC Role / Device Role / Timing Role: Input voltage supervisor and adaptive charger that negotiates PD contract, regulates input current limit, and charges battery without violating source current limits. Use Value: Input current limiting prioritizes system load over charging, preventing PD contract violation; MPPT not used but wide 4.5–35V range accommodates full PD profile.
Industrial Handhelds	Ruggedized Notebooks
Use Scenario: Barcode scanners and field data collectors operating in extreme ambient temperatures (-30°C to +70°C) with frequent partial recharges from vehicle DC or solar sources. IC Role / Device Role / Timing Role: Battery fuel gauge enabler and thermal-aware charger using die and battery temperature telemetry to adjust charge parameters dynamically. Use Value: JEITA-compliant charging prevents lithium plating at low temperatures; 125°C max junction rating ensures reliability in sealed enclosures.	Use Scenario: Military-grade notebooks deployed in vehicles or remote sites where input sources vary between 12V truck battery, solar array, and AC adapter. IC Role / Device Role / Timing Role: Dual-path power manager that selects optimal source (VIN vs battery), regulates charge, and maintains stable V_OUT during transient load steps. Use Value: Low-loss PowerPath reduces voltage drop across external FETs; 3.2A charge current enables sub-2hr recharge of 5000mAh 3S packs.

Medical Instruments

USB-C Power Delivery

Use Scenario: Portable ultrasound and patient monitors requiring reliable battery runtime and fast recharge from variable-input sources including hospital wall adapters and mobile carts.

IC Role / Device Role / Timing Role: Primary battery charger and PowerPath manager ensuring uninterrupted system operation during hot-swap battery replacement and AC-to-battery transition.

Use Value: Instant-on capability allows device startup even with 0V battery; 4.2V fixed charge voltage matches standard Li-ion cathode chemistry used in medical packs.

Use Scenario: USB-C PD sink devices (e.g., docking stations) that accept 5–20V input and must charge internal multi-cell batteries while powering downstream ports.

IC Role / Device Role / Timing Role: Input voltage supervisor and adaptive charger that negotiates PD contract, regulates input current limit, and charges battery without violating source current limits.

Use Value: Input current limiting prioritizes system load over charging, preventing PD contract violation; MPPT not used but wide 4.5–35V range accommodates full PD profile.

Industrial Handhelds

Ruggedized Notebooks

Use Scenario: Barcode scanners and field data collectors operating in extreme ambient temperatures (-30°C to +70°C) with frequent partial recharges from vehicle DC or solar sources.

IC Role / Device Role / Timing Role: Battery fuel gauge enabler and thermal-aware charger using die and battery temperature telemetry to adjust charge parameters dynamically.

Use Value: JEITA-compliant charging prevents lithium plating at low temperatures; 125°C max junction rating ensures reliability in sealed enclosures.

Use Scenario: Military-grade notebooks deployed in vehicles or remote sites where input sources vary between 12V truck battery, solar array, and AC adapter.

IC Role / Device Role / Timing Role: Dual-path power manager that selects optimal source (VIN vs battery), regulates charge, and maintains stable V_OUT during transient load steps.

Use Value: Low-loss PowerPath reduces voltage drop across external FETs; 3.2A charge current enables sub-2hr recharge of 5000mAh 3S packs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar multicell Li-ion charging applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BQ25792RTWR	4.2V fixed charge voltage; supports NVDC PowerPath but lacks integrated MPPT; 12-bit telemetry only.	No native solar MPPT - requires external MCU coordination for solar tracking; lower telemetry resolution impacts BMS accuracy.	Select for cost-sensitive USB-C PD applications where MPPT is unnecessary and I²C register compatibility with existing BQ257xx firmware is required.
MAX77751AEWJ+T	4.2V fixed charge; includes integrated 3.2A switcher but no MPPT; supports USB PD 3.0 programmable power supply (PPS) negotiation.	Designed for smartphone-class systems with PPS input; lacks PowerPath handover timing control and BSR measurement.	Select when USB PD PPS input compliance is mandatory and solar or industrial input sources are not used.

Compared with LTC4162EUFD-L42M#PBF, BQ25792RTWR offers lower telemetry fidelity and no autonomous MPPT, while MAX77751AEWJ+T adds PPS support but removes PowerPath flexibility and battery impedance diagnostics - making LTC4162EUFD-L42M#PBF optimal for solar-powered industrial and medical systems requiring full telemetry and autonomous energy harvesting.

Availability

LTC4162EUFD-L42M#PBF is available at Aetrix Electronics and suitable for medical instruments, industrial handhelds, and ruggedized notebooks requiring stable component supply, long-term lifecycle support, and guaranteed performance across –40°C to +125°C.

Supply support for LTC4162EUFD-L42M#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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation and power management.

The LTC4162 product line delivers advanced battery charging and PowerPath management for mission-critical portable systems, emphasizing telemetry-rich operation, solar energy harvesting, and robust thermal safety in harsh environments.

FAQ

What is the fixed charge voltage setting of the LTC4162EUFD-L42M#PBF?

The LTC4162EUFD-L42M#PBF is factory-configured for a fixed 4.2V per-cell charge voltage, optimized for standard lithium-ion and lithium-polymer battery chemistries. This value is hard-coded and cannot be altered via I²C registers - unlike the I²C-adjustable LTC4162EUFD-LAD#PBF variant. The 4.2V setting aligns with JEITA guidelines for room-temperature charging and enables direct compatibility with common 3S and 4S battery packs used in medical and industrial equipment.

Does the LTC4162EUFD-L42M#PBF support Maximum Power Point Tracking (MPPT)?

Yes, the LTC4162EUFD-L42M#PBF includes fully integrated MPPT functionality activated by default. It performs automatic voltage/current sweeps on solar panel inputs to identify and lock onto the global maximum power point without requiring host MCU intervention. The algorithm operates independently using internal timers and ADC measurements, supporting panels with open-circuit voltages up to 35V. MPPT behavior is confirmed in the "Order Information" table and validated in Typical Performance Characteristics Figure G13–G15.

How does the PowerPath™ architecture in the LTC4162EUFD-L42M#PBF enable instant-on operation?

The LTC4162EUFD-L42M#PBF's PowerPath™ topology uses separate INFET and BATFET gate drivers to decouple V_OUT from battery voltage. When the battery is deeply discharged or absent, the IC powers V_OUT directly from VIN through the external INFET MOSFET while simultaneously charging the battery. This eliminates boot-up delays caused by low battery voltage, allowing systems like ruggedized notebooks to power on immediately - a capability verified in the "Typical Application" schematic and "Instant-On Operation" feature bullet.

What telemetry parameters can be read from the LTC4162EUFD-L42M#PBF via I²C?

The LTC4162EUFD-L42M#PBF provides 16-bit resolution telemetry for eight critical parameters via its I²C interface: battery voltage (V_BATSENS+), battery current (I_BAT), input current (I_IN), input voltage (V_IN), output voltage (V_OUT), die temperature (T_DIE), battery temperature (T_BAT via NTC), and battery series resistance (R_BAT). All values are accessible through dedicated registers documented in the "Register Descriptions" section (pages 36–50), with typical accuracy specified in the Electrical Characteristics table (e.g., ±1mV on V_BATSENS+).

What is the recommended external sense resistor for achieving 3.2A charge current with the LTC4162EUFD-L42M#PBF?

To achieve the full 3.2A charge current, a 10mΩ external sense resistor (RSNSB) is recommended between CSP and CSN pins, as specified in the Electrical Characteristics table and confirmed in Note 5. With this value and the typical servo voltage range of 1–32mV, the resulting current resolution is 0.1A/LSB. The datasheet specifies ±0.25mV offset error on the I_BAT measurement path, yielding <±0.8% total charge current error at 3.2A - consistent with design examples in the Applications Information section.

LTC4162EUFD-L42M#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-L42M#PBF FAQ

1.How can I place an order for LTC4162EUFD-L42M#PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for LTC4162EUFD-L42M#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-L42M#PBF reliable?

The price and inventory of LTC4162EUFD-L42M#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-L42M#PBF is usually 5 days.

3.What payment methods are accepted for LTC4162EUFD-L42M#PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4162EUFD-L42M#PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LTC4162EUFD-L42M#PBF?

LTC4162EUFD-L42M#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LTC4162EUFD-L42M#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-L42M#PBF?

For technical support, including LTC4162EUFD-L42M#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4162EUFD-L42M#PBF requirements.

6.How does Aetrix verify that LTC4162EUFD-L42M#PBF is sourced from the original manufacturer or authorized distributors?

All LTC4162EUFD-L42M#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-L42M#PBF meets industry standards.

7.What is the process for return or replacement of LTC4162EUFD-L42M#PBF?

All LTC4162EUFD-L42M#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4162EUFD-L42M#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-L42M#PBF part is unused and in its original packaging.

Return procedure for LTC4162EUFD-L42M#PBF:

1.Submit a request within 90 days.

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

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