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

Analog Devices Inc. LTC4162IUFD-LADM#PBF

Name: LTC4162IUFD-LADM#PBF
Brand: Analog Devices Inc.
SKU: LTC4162IUFD-LADM#PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LTC4162IUFD-LADM#PBF

Manufacturer:: Analog Devices Inc.

Category:: Battery Management

Package:: 28-WFQFN Exposed Pad

Datasheet:: LTC4162IUFD-LADM#PBF.pdf

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

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Product details

Overview

LTC4162IUFD-LADM#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 even with deeply discharged or missing batteries-used in ruggedized notebooks and industrial handhelds.

For engineers reviewing the LTC4162IUFD-LADM#PBF datasheet, LTC4162IUFD-LADM#PBF pinout, LTC4162IUFD-LADM#PBF application, or LTC4162IUFD-LADM#PBF equivalent, key selection criteria include input voltage range (4.5V–35V), I²C-configurable charging parameters, integrated MPPT activation, 16-bit telemetry resolution for V_BAT/I_BAT/R_BAT/T_BAT, and thermal regulation down to –40°C.

Technical Context

The LTC4162IUFD-LADM#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.

MPPT is enabled via internal algorithm that dynamically adjusts input current limit to maximize power extraction from solar panels; telemetry includes 16-bit ADC measurements of V_BAT, I_BAT, R_BAT, T_BAT, T_DIE, V_IN, I_IN, and V_OUT, all accessible over I²C at address 0b1101000.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.5V to 35V - supports wall adapters, USB-C PD, and solar panels without external pre-regulation
Max Charge Current	3.2A - configurable via I²C or external sense resistor (RSNSB), enabling fast charging of multi-cell Li-ion packs
Cell Count Support	1–8 cells - set by CELLS0/CELLS1 strapping; accommodates 3.7V to 29.6V battery systems
Switching Frequency	1.5MHz (typ) - fixed frequency with RT pin programmability (1.4–1.6MHz), enabling compact magnetics
Telemetry Resolution	16-bit ADC - provides ±0.15mV offset error on I_BAT measurement, critical for precise Coulomb counting
MPPT Enable	Enabled - distinguishes LTC4162IUFD-LADM#PBF from non-MPPT variants (e.g., LTC4162IUFD-LAD#PBF)
Operating Temp	–40°C to +125°C - qualified for industrial and medical environments with full specification guarantee

Pinout & Package

Package: 28-pin 4mm × 5mm × 0.75mm QFN with exposed AGND pad (Pin 29), thermally enhanced for high-power battery charging applications.

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 enable instant-on and load sharing
CSP/CSN (21/20)	Charge current sense	Differential inputs for RSNSB; sets I_CHARGE = (VCSP–VCSN)/RSNSB with 5-bit resolution (12.5mV LSB)
CLP/CLN (5/4)	Input current sense	Differential inputs for RSNSI; configures I_IN limit = (VCLP–VCLN)/RSNSI with 6-bit resolution (0.5mV LSB)
CELLS0/CELLS1 (17/18)	Cell count configuration	Strap to INTVCC/VCC2P5/GND to select 1–8 series cells; determines V_CHARGE per cell and telemetry scaling
NTC/NTCBIAS (10/9)	Thermal sensing interface	Provides 1.2V bias and digitizes NTC thermistor voltage for JEITA-compliant temperature-controlled charging
SCL/SDA/SMBALERT (13/14/12)	I²C interface	Standard SMBus-compatible port (0b1101000) for telemetry readback and real-time parameter reconfiguration

Key Features

Feature	Design Value
PowerPath™ Management	Decouples system load (VOUT) from battery voltage, enabling instant startup and seamless source handover without brownout
MPPT Algorithm	Active maximum power point tracking for solar panel inputs-enabled only in -LADM/-L40M/-L41M/-L42M variants
16-Bit Telemetry System	Simultaneous high-resolution measurement of V_BAT, I_BAT, R_BAT, T_BAT, T_DIE, V_IN, I_IN, V_OUT with <1.5% span error
JEITA Temperature Control	Configurable charge enable/disable thresholds per temperature zone, compliant with JIS C 8712 for safe Li-ion charging
Thermal Regulation	Die temperature monitoring with automatic charge current reduction when T_DIE exceeds 70°C (thermal start) to 80°C (thermal end)

Applications

Medical Instruments	Industrial Handhelds
Use Scenario: Portable ultrasound or infusion pump requiring reliable battery operation across wide ambient temperatures and solar-recharge capability in field deployments. IC Role / Device Role / Timing Role: Primary battery charger and PowerPath manager-handles dual-input (AC adapter + solar) power routing while maintaining uninterrupted system operation during battery swaps. Use Value: MPPT maximizes energy harvest from portable solar panels; 16-bit telemetry enables accurate battery health monitoring and predictive maintenance.	Use Scenario: Rugged barcode scanner used in warehouse logistics with frequent hot-swap battery requirements and exposure to temperature extremes. IC Role / Device Role / Timing Role: Synchronous step-down charger with instant-on PowerPath-powers system directly from input when battery is depleted or absent, eliminating boot delay. Use Value: Input undervoltage lockout (VIN_DUVLO = 100–200mV) prevents false triggering during transient input dips; –40°C to +125°C operation ensures reliability in unconditioned environments.
Ruggedized Notebooks	USB-C Power Delivery Systems
Use Scenario: Military-grade tablet operating in vehicles with variable 12–28V DC inputs and need for simultaneous charging and system run-from-battery. IC Role / Device Role / Timing Role: Dual-role power manager-regulates input current to avoid overloading vehicle electrical systems while delivering up to 3.2A to 4-cell Li-ion pack. Use Value: Input current limiting prioritizes system load over charging; I²C telemetry allows host MCU to adapt charging profile based on real-time thermal and battery resistance data.	Use Scenario: USB-C PD sink device (e.g., portable monitor) accepting up to 100W input and managing internal Li-ion battery with dynamic power allocation. IC Role / Device Role / Timing Role: High-efficiency buck charger interfacing with USB-C PD controller-accepts variable VBUS (5–20V) and regulates to optimal battery voltage with MPPT-like optimization under low-light conditions. Use Value: Wide 4.5–35V input range eliminates need for additional buck-boost stage; I²C configurability allows firmware to adjust charge voltage/current based on PD contract negotiation.

Medical Instruments

Industrial Handhelds

Use Scenario: Portable ultrasound or infusion pump requiring reliable battery operation across wide ambient temperatures and solar-recharge capability in field deployments.

IC Role / Device Role / Timing Role: Primary battery charger and PowerPath manager-handles dual-input (AC adapter + solar) power routing while maintaining uninterrupted system operation during battery swaps.

Use Value: MPPT maximizes energy harvest from portable solar panels; 16-bit telemetry enables accurate battery health monitoring and predictive maintenance.

Use Scenario: Rugged barcode scanner used in warehouse logistics with frequent hot-swap battery requirements and exposure to temperature extremes.

IC Role / Device Role / Timing Role: Synchronous step-down charger with instant-on PowerPath-powers system directly from input when battery is depleted or absent, eliminating boot delay.

Use Value: Input undervoltage lockout (VIN_DUVLO = 100–200mV) prevents false triggering during transient input dips; –40°C to +125°C operation ensures reliability in unconditioned environments.

Ruggedized Notebooks

USB-C Power Delivery Systems

Use Scenario: Military-grade tablet operating in vehicles with variable 12–28V DC inputs and need for simultaneous charging and system run-from-battery.

IC Role / Device Role / Timing Role: Dual-role power manager-regulates input current to avoid overloading vehicle electrical systems while delivering up to 3.2A to 4-cell Li-ion pack.

Use Value: Input current limiting prioritizes system load over charging; I²C telemetry allows host MCU to adapt charging profile based on real-time thermal and battery resistance data.

Use Scenario: USB-C PD sink device (e.g., portable monitor) accepting up to 100W input and managing internal Li-ion battery with dynamic power allocation.

IC Role / Device Role / Timing Role: High-efficiency buck charger interfacing with USB-C PD controller-accepts variable VBUS (5–20V) and regulates to optimal battery voltage with MPPT-like optimization under low-light conditions.

Use Value: Wide 4.5–35V input range eliminates need for additional buck-boost stage; I²C configurability allows firmware to adjust charge voltage/current based on PD contract negotiation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LTC4162IUFD-LAD#PBF	No MPPT enabled; identical pinout, package, and I²C interface but lacks solar panel optimization algorithm	Suitable for AC adapter-only or fixed-input applications where MPPT adds no value	Select LTC4162IUFD-LADM#PBF when solar input is present; choose LTC4162IUFD-LAD#PBF for cost-sensitive non-solar designs
BQ25792RTWR	TI part with 3.5A max charge current, 3.0–24V input, integrated FETs (no external INFET/BATFET required), but no MPPT or 8-cell support	Targeted at space-constrained consumer electronics; lacks telemetry depth and industrial temp grade	LTC4162IUFD-LADM#PBF offers superior telemetry, wider input range, and extended temperature rating for industrial use cases

Compared with LTC4162IUFD-LAD#PBF, the LTC4162IUFD-LADM#PBF adds active MPPT for solar harvesting without hardware change; versus BQ25792RTWR, it provides higher cell count support, deeper telemetry, and guaranteed –40°C to +125°C operation-making it suitable for mission-critical industrial and medical battery systems.

Availability

LTC4162IUFD-LADM#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 industrial temperature performance.

Supply support for LTC4162IUFD-LADM#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 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 advanced battery management ICs with integrated PowerPath, telemetry, and MPPT-designed specifically for high-reliability portable equipment needing intelligent, multi-source power handling and precise battery health monitoring.

FAQ

What is the primary function of the LTC4162IUFD-LADM#PBF in a battery-powered system?

The LTC4162IUFD-LADM#PBF serves as a synchronous step-down battery charger and PowerPath manager. It controls charging of 1–8-cell Li-ion/polymer batteries from inputs up to 35V, manages seamless power handover between input sources and battery, and provides comprehensive I²C-accessible telemetry-including voltage, current, resistance, and temperature measurements. Its MPPT feature optimizes solar panel energy capture, distinguishing it from non-MPPT variants like LTC4162IUFD-LAD#PBF.

How does the MPPT functionality in the LTC4162IUFD-LADM#PBF differ from standard input current limiting?

The MPPT in LTC4162IUFD-LADM#PBF actively sweeps input voltage and adjusts the input current limit to locate and maintain operation at the solar panel's maximum power point-unlike static current limiting. This algorithm runs continuously during solar charging and requires no external microcontroller intervention. The LTC4162IUFD-LADM#PBF is the only variant in the LTC4162-IUFD family with this feature enabled by default; other versions (e.g., LTC4162IUFD-L40#PBF) lack MPPT firmware and cannot replicate this behavior.

Can the LTC4162IUFD-LADM#PBF operate without a battery connected?

Yes-the LTC4162IUFD-LADM#PBF supports instant-on operation with a discharged or missing battery via its PowerPath architecture. When no valid battery voltage is detected at BATSENS+, the device powers the system load (VOUT) directly from VIN through the external INFET MOSFET, enabling immediate system startup. Battery presence is verified via differential sensing between BATSENS+ and CSN; if invalid, the charger enters standby but maintains VOUT regulation.

What are the critical PCB layout considerations for the LTC4162IUFD-LADM#PBF?

Key layout requirements for LTC4162IUFD-LADM#PBF include: (1) low-inductance Kelvin connections for CSP/CSN and CLP/CLN sense resistors; (2) direct connection of the exposed AGND pad (Pin 29) to a solid inner-layer ground plane; (3) placement of 10µF VOUT bypass capacitors as close as possible to Pins 27/28; and (4) separation of analog (AGND, NTC, RT) and power (PGND, SW) grounds with single-point tie to AGND. These practices minimize noise coupling into the 16-bit telemetry subsystem and ensure stable switching regulation.

How is cell count configured on the LTC4162IUFD-LADM#PBF, and why does it matter for telemetry?

Cell count is set by strapping CELLS0 (Pin 17) and CELLS1 (Pin 18) to INTVCC, VCC2P5, or GND-defining 1–8 cells in binary-coded combinations. This setting directly scales the V_BAT telemetry range (e.g., 2.7–35V full scale for 1 cell vs. 21.6–35V for 8 cells) and determines the per-cell charge voltage target (e.g., 4.2V/cell). Incorrect strapping causes inaccurate battery voltage reporting and improper termination, making correct configuration essential before first power-up of LTC4162IUFD-LADM#PBF.

LTC4162IUFD-LADM#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)

LTC4162IUFD-LADM#PBF FAQ

1.How can I place an order for LTC4162IUFD-LADM#PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for LTC4162IUFD-LADM#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 LTC4162IUFD-LADM#PBF reliable?

The price and inventory of LTC4162IUFD-LADM#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4162IUFD-LADM#PBF is usually 5 days.

3.What payment methods are accepted for LTC4162IUFD-LADM#PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4162IUFD-LADM#PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LTC4162IUFD-LADM#PBF?

LTC4162IUFD-LADM#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LTC4162IUFD-LADM#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 LTC4162IUFD-LADM#PBF?

For technical support, including LTC4162IUFD-LADM#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4162IUFD-LADM#PBF requirements.

6.How does Aetrix verify that LTC4162IUFD-LADM#PBF is sourced from the original manufacturer or authorized distributors?

All LTC4162IUFD-LADM#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 LTC4162IUFD-LADM#PBF meets industry standards.

7.What is the process for return or replacement of LTC4162IUFD-LADM#PBF?

All LTC4162IUFD-LADM#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4162IUFD-LADM#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 LTC4162IUFD-LADM#PBF part is unused and in its original packaging.

Return procedure for LTC4162IUFD-LADM#PBF:

1.Submit a request within 90 days.

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

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