Analog Devices Inc. LTC4062EDD#PBF

Overview

LTC4062EDD#PBF from Analog Devices (formerly Linear Technology) is a standalone linear Li-Ion battery charger IC for single-cell batteries, supporting USB-compliant input (4.3V–8V), programmable charge current up to 1A, ±0.35% float voltage accuracy (4.2V), and thermal regulation at 105°C. It integrates an internal P-channel MOSFET, micropower comparator (operational down to V_BAT ≥ 2.5V), and SmartStart™ algorithm-used in portable MP3 players, digital cameras, and handheld computers.

For engineers reviewing the LTC4062EDD#PBF datasheet, LTC4062EDD#PBF pinout, LTC4062EDD#PBF application, or LTC4062EDD#PBF equivalent, key selection considerations include USB C/5 current programming, dual termination modes (timer- or current-based), thermal feedback control, low-quiescent shutdown (20µA), and integrated trickle-charge with defective-battery detection.

Technical Context

The LTC4062EDD#PBF implements a constant-current/constant-voltage (CC/CV) charging algorithm with three operational phases: trickle-charge (10% I_CHG below 2.9V), full-current CC mode, and CV mode terminating at 4.2V ±0.35%. Termination is selectable via TIMER pin configuration: capacitor-based timing (e.g., 0.1µF = 3h), resistor-programmed current threshold (I_DETECT), or user-controlled via EN.

Its internal architecture includes a precision 1V bandgap-referenced comparator (IN+/OUT), programmable PROG pin (1V servo, 1000× scaling), thermal regulation loop limiting die temperature to ~105°C, and undervoltage lockout (3.8V with 200mV hysteresis). The CHRG pin provides three-state status indication (pull-down, high-Z, 6Hz pulsing for fault).

Key Specifications

Pinout & Package

Package: 10-lead (3mm × 3mm) DFN, 0.75mm profile, exposed pad (Pin 11 = GND, must be soldered to PCB for thermal performance; θ_JA = 40°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar standalone Li-Ion charging applications.

Compared with MAX1555ETA+ and BQ24075RGTR, the LTC4062EDD#PBF uniquely combines programmable current, ±0.35% voltage accuracy, thermal regulation, and zero-V_CC comparator operation-making it optimal for space-constrained, thermally sensitive, and battery-health-aware portable designs.

Availability

LTC4062EDD#PBF is available at Aetrix Electronics and suitable for handheld computers, portable MP3 players, and digital cameras requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for LTC4062EDD#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. (ADI) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and power management solutions for precision, reliability, and efficiency-critical applications.

The LTC4062EDD#PBF belongs to ADI's Linear Technology legacy battery management portfolio, designed specifically for compact, USB-powered portable electronics needing autonomous, thermally robust, and battery-health-conscious Li-Ion charging.

FAQ

What is the maximum charge current supported by the LTC4062EDD#PBF?

The LTC4062EDD#PBF supports a programmable charge current up to 1A, set by an external resistor connected from the PROG pin to ground. At R_PROG = 1.25kΩ, the typical charge current is 800mA; at R_PROG = 1kΩ, it reaches ~1A. The device maintains ±0.35% float voltage accuracy across this range and employs thermal regulation to prevent overheating during high-current operation.

How does the LTC4062EDD#PBF handle thermal management during charging?

The LTC4062EDD#PBF features an internal thermal regulation loop that actively reduces charge current when the junction temperature approaches ~105°C. This dynamic adjustment eliminates risk of overheating without requiring external thermal sensors or PCB copper pour design changes. The regulation ensures safe operation under high ambient temperatures or high-power PCB layouts while maintaining maximum possible charge rate.

Can the LTC4062EDD#PBF operate without an external power supply connected?

Yes-the LTC4062EDD#PBF's micropower comparator remains fully functional with V_CC = 0V, provided V_BAT ≥ 2.5V. In this mode, the IN+/OUT comparator draws only 7–13µA from the battery and retains its 1V threshold with 50mV hysteresis. This enables battery voltage monitoring, low-battery alerts, and wake-up signaling in systems where main power may be absent for extended periods.

What termination methods does the LTC4062EDD#PBF support, and how are they selected?

The LTC4062EDD#PBF supports three charge termination methods selected via the TIMER pin: (1) capacitor-based timing (e.g., 0.1µF = 3h), (2) current-based termination (TIMER grounded + R_DETECT on IDET), and (3) user-controlled termination (TIMER tied to V_CC). Each method configures CHRG pin behavior differently-pull-down, high-Z, or pulsing-and determines whether SmartStart and automatic recharge remain active.

Does the LTC4062EDD#PBF include defective battery detection, and how does it indicate failure?

Yes-the LTC4062EDD#PBF implements defective battery detection during trickle-charge mode. If V_BAT remains below 2.9V for more than 25% of the programmed charge time, the device enters FAULT mode and drives the CHRG pin with a 6Hz square wave (50% duty cycle). This pulsing pattern-visible on an LED-is a clear hardware-level indicator that the battery should be replaced, requiring no microcontroller intervention.