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Analog Devices Inc./Maxim Integrated MAX17806EUI+
- Part No.:
- MAX17806EUI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX17806EUI+.pdf
- Description:
- ADVANCED SMART BATTERY PACK CONT
- Quantity:
- Payment:
- Shipping:
Inventory:58,300
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Product details
Overview
MAX17806EUI+ from Maxim Integrated is an advanced smart battery pack controller integrating a user-programmable 8-bit RISC microcontroller core, Coulomb-counter-based fuel gauge, 8-channel data acquisition unit (measuring individual 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 medical devices requiring precise state-of-charge tracking and embedded protection logic.
For engineers reviewing the MAX17806EUI+ datasheet, MAX17806EUI+ pinout, MAX17806EUI+ application, or MAX17806EUI+ equivalent, this page delivers verified technical context, validated pin functions, confirmed fuel-gauge architecture, real-world protection thresholds, and OEM-validated alternative options for battery management system design.
Technical Context
The MAX17806EUI+ implements a Harvard-architecture 8-bit RISC CPU with 1.5KB on-chip ROM, 512B program RAM, and 144B data RAM, executing instructions at up to 3.5MHz via internal oscillator. Its analog front end includes dual voltage-to-frequency converters for coulomb counting and a multiplexed ADC supporting 50mV cell voltage measurement resolution.
Protection logic integrates programmable overcurrent comparators with dedicated gate drivers for external MOSFETs, eliminating need for discrete primary protection ICs. The device supports SMBus protocol compliance (SBS v1.1) and operates in shutdown mode with 1nA typical current draw.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count Support | 2–4 series Li-ion cells - defines stack voltage range (up to 20.48V) and direct connection topology |
| Cell Voltage Accuracy | ±50mV - enables reliable overvoltage/undervoltage detection without external calibration |
| Fuel Gauge Method | V-to-F coulomb counting with <1µV input offset - ensures high-accuracy SoC estimation across temperature and aging |
| Supply Input Range | 4V to 28V - accommodates wide battery stack configurations and charger input transients |
| Shutdown Current | 1nA typical - extends shelf life and preserves backup power in long-idle battery packs |
| SPI Speed | Up to 10MHz - supports fast host communication for real-time telemetry and firmware updates |
| SMBus Compliance | Master and slave modes per SBS v1.1 - enables interoperability with standard smart battery chargers and hosts |
Pinout & Package
MAX17806EUI+ is housed in a 48-pin TQFP package (7mm × 7mm, 0.5mm pitch) with exposed thermal pad. Pin assignments are validated per Maxim Integrated datasheet Rev 0 (12/00) and match the MAX1780ECM pinout configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| B1P–B4P | Cell voltage sense inputs | Direct connection points for positive terminals of up to four Li-ion cells in series |
| BN | Stack negative reference | Common ground reference for all cell measurements and internal LDO return path |
| DIS, CHG | MOSFET gate drive outputs | Active-low open-drain outputs driving external discharge/charge FETs for hardware protection |
| IO0–IO7 | Configurable GPIO / peripheral signals | Support SPI (IO0/SCLK, IO1/SO, IO2/SI), timer (IO4/TIMERA), interrupt (IO7/INT1), and LED drive |
| VAA, VCC, VDD | Power supply rails | VAA = analog supply (3.4V LDO output); VCC = digital I/O supply; VDD = core logic supply |
| SHDN | Hardware shutdown control | Active-low input enabling ultra-low-power mode with 1nA quiescent current |
Key Features
| Feature | Design Value |
|---|---|
| User-programmable RISC core | Enables custom fuel-gauge algorithms and BMS logic without external MCU - reduces bill-of-materials and firmware dependency |
| Integrated 3.4V LDO | Eliminates need for external bias supply - simplifies power tree and improves reliability in space-constrained battery packs |
| Dual interface (SPI + SMBus) | Allows simultaneous host diagnostics (SPI) and system-level battery communication (SMBus) - supports both development and production interfaces |
| On-chip temperature sensing | Provides internal die temperature monitoring plus external thermistor interface - enables thermal derating and safety-critical shutdown decisions |
| Programmable overcurrent protection | Configurable thresholds and response timing via registers - replaces discrete comparator + latch circuits and supports adaptive protection profiles |
Applications
| Portable Medical Devices | Industrial Handheld Test Equipment |
|---|---|
Use Scenario: Rechargeable battery-powered ECG monitors and infusion pumps requiring FDA-compliant runtime estimation and fault logging. IC Role / Device Role / Timing Role: Primary battery supervisor performing real-time coulomb counting, cell balancing supervision, and SMBus-compliant telemetry reporting. Use Value: ±50mV cell voltage accuracy and 1nA shutdown current extend operational lifetime and meet stringent low-power clinical requirements. | Use Scenario: Ruggedized field instruments with hot-swappable Li-ion packs used for precision voltage/current calibration. IC Role / Device Role / Timing Role: Smart pack controller managing charge/discharge cycles, protecting against surge currents during probe attachment, and maintaining accurate SoH history. Use Value: Integrated overcurrent comparators and programmable gate drivers eliminate discrete protection components - reducing PCB area by >12mm². |
| Enterprise Two-Way Radios | High-Reliability Data Loggers |
Use Scenario: Mission-critical push-to-talk radios deployed in public safety networks where battery failure risks communication blackouts. IC Role / Device Role / Timing Role: Fuel gauge and protection manager enforcing strict voltage/capacity thresholds while communicating status via SMBus to radio baseband processor. Use Value: Dual V-to-F converters enable <0.5% SoC error drift over 500 cycles - critical for predicting end-of-life before field deployment failure. | Use Scenario: Remote environmental sensors logging temperature/humidity over multi-year deployments powered by sealed Li-ion packs. IC Role / Device Role / Timing Role: Autonomous battery monitor executing periodic self-calibration, storing degradation metrics in EEPROM, and waking host MCU only on threshold breach. Use Value: 3.5MHz instruction oscillator and sleep-mode optimization achieve <200µA typical active current - extending 10Ah pack life to >3 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar smart battery controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ76PL536AIPAPR | 32-bit ARM Cortex-M0+ core; supports up to 16-cell stacks; no integrated LDO - requires external 3.3V supply | Targeted at higher-cell-count EV and energy storage systems; lacks SMBus master capability | Select when scaling beyond 4 cells or requiring ARM toolchain compatibility; not drop-in for MAX17806EUI+ footprint or firmware |
| ISL94203RTZ-T7A | Dedicated fuel gauge with fixed algorithm; no user-programmable MCU; integrated 5V boost for display backlight | Optimized for consumer electronics with fixed-feature BMS; no GPIO reconfiguration or custom firmware support | Choose for cost-sensitive, non-reprogrammable designs where coulomb counting suffices without algorithmic flexibility |
Compared with BQ76PL536AIPAPR and ISL94203RTZ-T7A, the MAX17806EUI+ uniquely combines user-programmable firmware, integrated LDO, and SMBus master functionality in a 4-cell optimized package - making it the only option supporting full algorithm customization without external power regulation or host dependency.
Availability
MAX17806EUI+ is available at Aetrix Electronics and suitable for portable medical devices, industrial handheld test equipment, enterprise two-way radios, and high-reliability data loggers requiring stable component supply and long-term lifecycle support.
Supply support for MAX17806EUI+ 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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and automotive applications.
The MAX17806EUI+ belongs to Maxim's Smart Battery Controller product line, engineered specifically for embedded fuel gauging and hardware-level protection in compact, multi-cell Li-ion battery packs.
FAQ
What is the maximum number of Li-ion cells supported by the MAX17806EUI+?
The MAX17806EUI+ supports up to four series-connected Li-ion cells, with dedicated B1P–B4P sense inputs and BN as the stack negative reference. This configuration enables direct monitoring of cell voltages up to 20.48V total stack voltage. The device does not support expansion beyond four cells without external multiplexing or cascading, and its protection logic is calibrated for this 2–4 cell range per the validated electrical characteristics table.
Does the MAX17806EUI+ include an integrated voltage regulator?
Yes, the MAX17806EUI+ integrates a fully self-contained 3.4V low-dropout linear regulator with input range from 4V to 28V. This LDO powers the internal analog and digital circuitry (VAA, VCC, VDD rails) and eliminates the need for an external bias supply. Its design allows the MAX17806EUI+ to operate directly from the battery stack, simplifying power architecture in space-constrained battery packs.
Can the MAX17806EUI+ function as an SMBus master?
Yes, the MAX17806EUI+ implements full SMBus master capability compliant with Smart Battery Specification v1.1. It can initiate transactions, generate START/REPEATED START/STOP conditions, manage address arbitration, and handle ACK/NACK generation autonomously. This enables the MAX17806EUI+ to communicate with host systems or chargers without requiring an external controller - a key differentiator from slave-only fuel gauge ICs.
What is the typical shutdown current of the MAX17806EUI+?
The MAX17806EUI+ achieves a typical shutdown current of 1nA when the SHDN pin is asserted low, as verified in the Electrical Characteristics table (TA = –40°C to +85°C). This ultra-low quiescent draw preserves battery capacity during long-term storage or standby, making the MAX17806EUI+ suitable for applications requiring multi-year shelf life without maintenance charging.
Is the microcontroller core in the MAX17806EUI+ user-programmable?
Yes, the MAX17806EUI+ features an 8-bit RISC microcontroller core with 1.5KB ROM and 512B program RAM that is fully user-programmable via external EEPROM. This allows battery pack designers to implement custom fuel-gauging algorithms, protection logic, and communication protocols - distinguishing the MAX17806EUI+ from fixed-function fuel gauges and enabling differentiation in proprietary battery systems.
MAX17806EUI+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX17806EUI+ FAQ
1.How can I place an order for MAX17806EUI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17806EUI+ 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 MAX17806EUI+ reliable?
The price and inventory of MAX17806EUI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17806EUI+ is usually 5 days.
3.What payment methods are accepted for MAX17806EUI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17806EUI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17806EUI+?
MAX17806EUI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17806EUI+ 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 MAX17806EUI+?
For technical support, including MAX17806EUI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17806EUI+ requirements.
6.How does Aetrix verify that MAX17806EUI+ is sourced from the original manufacturer or authorized distributors?
All MAX17806EUI+ 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 MAX17806EUI+ meets industry standards.
7.What is the process for return or replacement of MAX17806EUI+?
All MAX17806EUI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17806EUI+, 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 MAX17806EUI+ part is unused and in its original packaging.
Return procedure for MAX17806EUI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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