Analog Devices Inc. LTC4096XEDD#PBF

Overview

LTC4096XEDD#PBF from Analog Devices (formerly Linear Technology) is a standalone dual-input linear Li-ion battery charger IC for single-cell 4.2V batteries, supporting independent programmable charge currents up to 1.2A from wall adapter and 1A from USB inputs, with ±0.6% float voltage accuracy and thermal regulation at 115°C - used in portable handheld devices requiring automatic input selection and low-quiescent shutdown.

For engineers reviewing the LTC4096XEDD#PBF datasheet, LTC4096XEDD#PBF pinout, LTC4096XEDD#PBF application, or LTC4096XEDD#PBF equivalent, key selection criteria include dual-input priority logic, independent current programming via IDC/IUSB pins, absence of trickle charge (vs. LTC4096), thermal foldback behavior, and 10-lead DFN package thermal pad grounding requirements.

Technical Context

The LTC4096XEDD#PBF implements constant-current/constant-voltage (CC/CV) charging with two internal P-channel MOSFETs enabling automatic DCIN/USBIN source selection - DCIN has priority when both inputs are valid and exceed UVLO thresholds (DCIN > 4.22V, USBIN > 4.0V) and maintain ≥30mV headroom over BAT. It lacks trickle charge circuitry present in the LTC4096 variant.

Charge termination is based on ITERM pin comparator monitoring with 3ms filter time; thermal regulation activates at ~115°C junction temperature to reduce charge current without shutdown, while hard thermal shutdown occurs at ~150°C. The PWR output sources up to 120mA and reflects active input voltage (DCIN or USBIN).

Key Specifications

Pinout & Package

Package: 10-lead (3mm × 3mm) DFN with exposed thermal pad (Pin 11 = GND), 0.75mm profile, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ24075RGTR, LTC4096XEDD#PBF provides native dual-input arbitration and thermal regulation without external components; compared with LTC4096EDD#PBF, it removes trickle charge functionality - simplifying qualification and eliminating potential overcharge risk in systems with battery fuel gauges.

Availability

LTC4096XEDD#PBF is available at Aetrix Electronics and suitable for portable medical monitors, industrial handheld scanners, and emergency communication radios requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant manufacturing.

Supply support for LTC4096XEDD#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 acquired Linear Technology in 2017 and maintains its precision analog and power management product lines with full datasheet, simulation model, and application support.

The LTC4096XEDD#PBF belongs to Linear's standalone battery charger IC family, designed specifically for space-constrained portable electronics needing robust dual-input Li-ion charging without microcontroller supervision.

FAQ

What is the key functional difference between LTC4096XEDD#PBF and LTC4096EDD#PBF?

The LTC4096XEDD#PBF omits the trickle charge feature present in the LTC4096EDD#PBF. When BAT voltage falls below 2.9V, LTC4096EDD#PBF delivers 1/10th of programmed current to condition deeply discharged cells, whereas LTC4096XEDD#PBF skips this stage and enters constant-current mode directly. Both share identical pinout, package, and all other charging parameters including float voltage, termination logic, and thermal regulation.

How does LTC4096XEDD#PBF select between DCIN and USBIN inputs?

LTC4096XEDD#PBF selects DCIN over USBIN when both inputs exceed their respective UVLO thresholds (DCIN > 4.22V, USBIN > 4.0V) and maintain ≥30mV above BAT voltage. If DCIN drops below these conditions, USBIN automatically becomes the active source. The PWR pin reflects the selected input voltage, sourcing up to 120mA to indicate valid power presence.

What is the purpose of the exposed thermal pad (Pin 11) on LTC4096XEDD#PBF?

The exposed thermal pad (Pin 11) on LTC4096XEDD#PBF is electrically GND and thermally critical: it must be soldered to a PCB copper pour to achieve the specified θJA = 40°C/W. Failure to do so increases thermal resistance significantly, causing premature thermal regulation and reduced maximum charge current - especially under sustained 1.2A DCIN operation.

Can LTC4096XEDD#PBF terminate charging without an external resistor on ITERM?

No. LTC4096XEDD#PBF requires an external resistor from ITERM to GND to set the termination threshold (ITERMINATE = 100mV / RITERM). Without this resistor, the ITERM pin floats, preventing reliable detection of current drop below threshold - resulting in indefinite constant-voltage charging and potential battery overvoltage stress. Typical values range from 1kΩ (100mA) to 10kΩ (10mA).

Does LTC4096XEDD#PBF support automatic recharge, and how does it work?

Yes. LTC4096XEDD#PBF enters automatic recharge when battery voltage falls below 4.15V (VFLOAT – 50mV) after charge termination. A 1.6ms filtered comparator detects this condition and restarts the full CC/CV cycle. This maintains battery SOC near 90% without host intervention and is visible as periodic CHRG pin pulsing if no battery is connected.