Analog Devices Inc./Maxim Integrated MAX17806ETI+CEA

Overview

MAX17806ETI+CEA from Maxim Integrated is an advanced smart battery pack controller integrating an 8-bit RISC microcontroller core, Coulomb-counter-based fuel gauge, 8-channel data acquisition unit (measuring individual Li-ion cell voltages to ±50mV accuracy), integrated 3.4V LDO regulator (VIN = 4V to 28V), and dual-interface support (SPI + SMBus master/slave). It directly supervises 2–4 series Li-ion cells in portable SMBus battery packs.

For engineers reviewing the MAX17806ETI+CEA datasheet, MAX17806ETI+CEA pinout, MAX17806ETI+CEA application, or MAX17806ETI+CEA equivalent, key selection considerations include its on-chip protection MOSFET drivers, <1µV input offset for fuel gauging, 1nA shutdown current, programmable overcurrent comparators, and integrated 3.5MHz instruction oscillator with watchdog timer.

Technical Context

The MAX17806ETI+CEA implements a Harvard-architecture 8-bit RISC CPU with 1.5KB on-chip ROM, 0.5KB program RAM, and 144 bytes of data RAM. It executes instructions at 3.5MHz and includes dedicated hardware peripherals: dual voltage-to-frequency ADCs for precise coulomb counting, analog front-end multiplexer with bias cancellation, and independent high-voltage output port (HV0–HV7) for cell balancing or LED driving.

Its mixed-signal architecture integrates a precision bandgap reference, 32.768kHz crystal oscillator, low-dropout linear regulator, and configurable GPIOs (IO0–IO7) supporting timer A/B, interrupts, and SMBus arbitration logic. Protection logic operates autonomously via hardware comparators for overcharge/discharge current detection without firmware intervention.

Key Specifications

Pinout & Package

MAX17806ETI+CEA is housed in a 48-pin TQFP package (7mm × 7mm, 0.5mm pitch) with exposed thermal pad. Pin functions are validated per Maxim Integrated datasheet Rev 0 (12/00) and confirmed on official ordering diagram.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ76PL536AIPAPR and MAX17853ATJ+T, the MAX17806ETI+CEA uniquely combines user-programmable firmware execution, integrated LDO, and SMBus master capability in a 4-cell optimized footprint-making it optimal for space-constrained, self-contained smart battery packs where autonomy and protocol flexibility are critical.

Availability

MAX17806ETI+CEA is available at Aetrix Electronics and suitable for laptop battery packs, medical portable devices, industrial handheld scanners, and remote data loggers requiring stable component supply and long-lifecycle support.

Supply support for MAX17806ETI+CEA 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

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in analog, mixed-signal, and power management ICs for industrial, computing, and portable applications.

The MAX17806ETI+CEA belongs to Maxim's Smart Battery Controller product line, designed specifically for autonomous, firmware-programmable supervision of multi-cell Li-ion battery packs in SBS-compliant and proprietary systems.

FAQ

What is the primary function of the MAX17806ETI+CEA in a battery pack?

The MAX17806ETI+CEA serves as a fully integrated smart battery pack controller that performs real-time cell voltage monitoring (±50mV accuracy), coulomb counting for fuel gauging, hardware-based overcurrent protection, and SMBus/SPI communication. It replaces discrete protection ICs and fuel gauges in 2–4 series Li-ion packs, and its user-programmable RISC core enables custom battery management logic without external microcontrollers.

Does the MAX17806ETI+CEA require external calibration for fuel gauging accuracy?

No, the MAX17806ETI+CEA does not require external calibration. Its fuel gauge uses a voltage-to-frequency conversion method with <1µV input offset voltage and automatic input offset cancellation circuitry. This design ensures high-accuracy coulomb counting across temperature and aging without factory trimming or field recalibration-key to reliable state-of-charge reporting in the MAX17806ETI+CEA.

Can the MAX17806ETI+CEA drive external MOSFETs for battery protection?

Yes, the MAX17806ETI+CEA includes dedicated gate drivers for external N-channel MOSFETs used in charge and discharge paths. Its hardware overcurrent comparators trigger protection responses autonomously, and the IO0–IO7 port supports configurable outputs-including HV0–HV7 high-voltage pins rated up to 28V-to directly control protection FETs without additional level-shifting circuitry in the MAX17806ETI+CEA design.

What power supply configurations does the MAX17806ETI+CEA support?

The MAX17806ETI+CEA accepts a wide input range of 4V to 28V and integrates a fully functional 3.4V low-dropout linear regulator. It can be powered directly from the battery stack (e.g., 3S or 4S Li-ion), eliminating the need for auxiliary power supplies. The internal LDO supplies all core logic, analog blocks, and I/O, ensuring stable operation even under varying stack voltage conditions in the MAX17806ETI+CEA.

Is the MAX17806ETI+CEA compatible with Smart Battery Specification (SBS) systems?

Yes, the MAX17806ETI+CEA supports full SBS compliance through its hardware SMBus interface with master capability. It implements required SBS commands-including ManufacturerAccess, RemainingCapacity, FullChargeCapacity, and CycleCount-and handles address arbitration, ACK/NACK generation, and timing constraints autonomously. This native SMBus master functionality enables seamless integration into notebook and enterprise portable systems using the MAX17806ETI+CEA.