Analog Devices Inc. LTC4062EDD#TRPBF

Overview

LTC4062EDD#TRPBF from Analog Devices (formerly Linear Technology) is a standalone linear Li-Ion battery charger IC for single-cell 4.2V batteries, supporting USB-compliant input (4.3V–8V), programmable charge current up to 1A via external resistor, ±0.35% float voltage accuracy, 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#TRPBF datasheet, LTC4062EDD#TRPBF pinout, LTC4062EDD#TRPBF application, or LTC4062EDD#TRPBF equivalent, key selection criteria include USB C/5 current programming, dual termination modes (timer- or current-based), 20µA shutdown quiescent current, and DFN-10 (3mm × 3mm, 0.75mm height) thermal performance with exposed pad grounding.

Technical Context

The LTC4062EDD#TRPBF implements a constant-current/constant-voltage (CC/CV) charging algorithm with three termination options: programmable timer (via CTIMER capacitor), current-based detection (via IDET resistor), or user-controlled (via EN/TIMER). Its internal thermal feedback loop dynamically reduces charge current above ~105°C junction temperature to prevent overheating without external compensation.

It features two independent open-drain status outputs: CHRG (three-state: pull-down, high-Z, 6Hz pulsing for fault indication) and OUT (micropower comparator output, functional with V_BAT ≥ 2.5V and V_CC = 0V), plus integrated undervoltage lockout (3.8V threshold, 200mV hysteresis) and reverse-battery protection (V_CC – V_BAT lockout at 190mV typical).

Key Specifications

Pinout & Package

Package: 10-lead (3mm × 3mm) low-profile DFN (DD), 0.75mm height, exposed thermal pad (Pin 11 = GND, must be soldered to PCB).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TP4056 and BQ24075, the LTC4062EDD#TRPBF uniquely combines micropower comparator operation with V_CC = 0V, SmartStart™ battery-presence-aware charging, and USB C/5 hardware scaling-all in a thermally optimized 3mm × 3mm DFN-making it optimal for space-constrained, battery-monitoring-critical portable devices.

Availability

LTC4062EDD#TRPBF is available at Aetrix Electronics and suitable for portable digital cameras, handheld computers, and Bluetooth headsets requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for LTC4062EDD#TRPBF 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) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and consumer markets.

The LTC4062EDD#TRPBF belongs to Linear's legacy precision battery management product line, designed specifically for USB-powered portable electronics needing robust, standalone, thermally aware Li-ion charging with minimal external components.

FAQ

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

The LTC4062EDD#TRPBF supports a programmable charge current up to 1A, set by an external resistor (R_PROG) 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 while applying thermal regulation above ~105°C junction temperature.

How does the LTC4062EDD#TRPBF handle thermal management during high-current charging?

The LTC4062EDD#TRPBF incorporates an internal thermal feedback loop that monitors die temperature and automatically reduces charge current when the junction exceeds ~105°C. This regulation occurs without external components or host intervention, preserving reliability in compact enclosures or high-ambient environments. The 3mm × 3mm DFN package with soldered exposed pad achieves θ_JA = 40°C/W, enabling sustained 800mA charging even at 55°C ambient.

Can the LTC4062EDD#TRPBF operate without a V_CC supply?

Yes-the micropower comparator (IN+/OUT) remains fully functional with V_CC = 0V as long as V_BAT ≥ 2.5V. In this mode, the comparator draws only 7–13µA from the battery and provides accurate 1V threshold detection with 50mV hysteresis. This capability enables battery presence sensing, low-voltage alerts, and system wake-up functions independent of main power rails.

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

The LTC4062EDD#TRPBF supports three charge termination methods: (1) timer-based (capacitor on TIMER pin), (2) current-based (resistor on IDET pin + TIMER grounded), and (3) user-controlled (TIMER tied to V_CC). Selection is hardware-configured-no firmware required. Timer mode offers fixed-duration charging (e.g., 0.1µF = 3h); current mode terminates when IBAT drops below IDETECT; user mode disables internal termination for external control via EN.

Does the LTC4062EDD#TRPBF include battery health monitoring features?

Yes-the LTC4062EDD#TRPBF includes SmartStart™ (recharges only if V_BAT < 4.1V), automatic recharge (restarts when V_BAT drops below 4.1V), and defective battery detection (fault mode with 6Hz CHRG pulsing if trickle charge persists >25% of timer duration). These features collectively extend usable battery cycle life and provide clear visual fault indication via the CHRG pin.