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Analog Devices Inc./Maxim Integrated MAX11080GUU+
- Part No.:
- MAX11080GUU+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- 38-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX11080GUU+.pdf
- Description:
- IC BATT MON LI-ION 1-12C 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,999
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Product details
Overview
MAX11080GUU+ from Maxim Integrated is a 12-channel, high-voltage lithium-ion battery-pack fault monitor IC designed for series-stacked multicell battery systems. It provides overvoltage and undervoltage fault detection with ±25mV OV accuracy and ±100mV UV accuracy across –40°C to +105°C, programmable delay (3.0ms–3.32s), and daisy-chain capability supporting up to 31 devices. It is used in electric vehicle battery management systems to prevent cell damage during charge/discharge cycles.
For engineers reviewing the MAX11080GUU+ datasheet, MAX11080GUU+ pinout, MAX11080GUU+ application, or MAX11080GUU+ equivalent, key selection criteria include its 38-pin TSSOP package, 6V–72V operating input range, 300mV comparator hysteresis, ultra-low 80µA operating current, and AEC-Q100 Type 2 qualification for automotive-grade reliability.
Technical Context
The MAX11080GUU+ implements differential cell voltage monitoring with internal 4× attenuation and AGND-referenced comparators. Its OV/UV thresholds are set via dedicated pin-strapped inputs (OVSEL0–3, UVSEL0–2), with configuration latched at power-up to prevent runtime glitches.
It integrates a 3.3V linear regulator powered from DCIN (6V–72V), a charge pump generating level-shifted VDDU/GNDU for daisy-chain communication, and a CD pin-based RC-programmable alarm delay circuit with 6.1µA current source and 1.23V internal trip threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Channels | 12 independent Li+ cell inputs (C0–C12), enabling full-stack monitoring of 12-series battery packs. |
| OV Threshold Range | +3.3V to +4.8V in 100mV steps; ±25mV accuracy ensures precise overcharge protection across temperature. |
| UV Threshold Range | +1.6V to +2.8V in 200mV steps; ±100mV accuracy supports reliable deep-discharge prevention. |
| Alarm Delay Range | 3.0ms to 3.32s via external CD capacitor (15nF–16.5µF); enables configurable fault persistence filtering. |
| Operating Voltage | DCIN = 6.0V to 72V; supports wide-range battery stacks from 2S to >20S Li+ configurations. |
| Current Consumption | 80µA in operating mode; 2µA in shutdown - critical for low-quiescent BMS standby operation. |
| Temperature Range | –40°C to +105°C, AEC-Q100 Type 2 qualified - suitable for under-hood and traction battery environments. |
Pinout & Package
MAX11080GUU+ is housed in a lead-free, RoHS-compliant 38-pin TSSOP package (9.7mm × 4.4mm, 0.5mm pitch) optimized for high-density battery module PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DCIN | Main power input | Supplies internal 3.3V regulator; accepts 6V–72V - eliminates need for external bias supply in high-voltage stacks. |
| C0–C12 | Differential cell voltage inputs | Monitor cell voltages across 12-series stack; C0 connects to AGND (cell 1 negative), C12 to top of stack (cell 12 positive). |
| OVSEL0–3 / UVSEL0–2 | Threshold configuration inputs | Pin-strapped binary inputs selecting OV/UV thresholds; latched at power-up to prevent spurious reconfiguration. |
| CD | Programmable delay timing node | Connects to external capacitor; charges at 6.1µA to 1.23V threshold - sets alarm hold time before ALRML assertion. |
| ALRML / ALRMU | Daisy-chain alarm interface | ALRML outputs heartbeat (4.096kHz) or level alarm; ALRMU receives upstream alarm signal - enables cascaded fault propagation without isolators. |
| TOPSEL | Stack position identifier | Drives VAA to indicate topmost device in daisy chain; enables automatic hierarchical fault reporting in multi-module systems. |
| SHDN | Global shutdown control | Active-low input disabling regulators, oscillators, and comparators - reduces current to 2µA for system-level power gating. |
Key Features
| Feature | Design Value |
|---|---|
| 12-cell differential monitoring | Simultaneous real-time tracking of all cell voltages in series stacks - enables per-cell fault isolation without multiplexing overhead. |
| Daisy-chain scalability | Up to 31 devices connected serially using ALRML/ALRMU; eliminates isolated digital interfaces and reduces BOM cost per module. |
| Comparator hysteresis | 300mV (MAX11080-specific) prevents false triggering near OV/UV thresholds due to noise or transient ripple. |
| Integrated linear regulator | Generates stable 3.3V VAA from 6V–72V DCIN - removes dependency on external LDO and simplifies power architecture. |
| AEC-Q100 qualification | Type 2 rating (–40°C to +105°C) confirms suitability for automotive traction battery applications with stringent reliability requirements. |
Applications
| Electric Vehicle Traction Battery | Hybrid Electric Vehicle Energy Storage |
|---|---|
Use Scenario: Monitoring 96-cell (3.7V nominal) LiNiMnCoO₂ stack in BEV powertrain under regenerative braking and fast charging. IC Role / Device Role / Timing Role: Fault monitor detecting individual cell overvoltage (>4.25V) or undervoltage (<2.5V) with 10ms delay to reject transients. Use Value: Prevents thermal runaway by triggering pack disconnect before cell degradation occurs; hysteresis avoids chatter during voltage recovery. |
Use Scenario: Supervising 48-cell LFP battery in HEV start-stop and energy recapture subsystem. IC Role / Device Role / Timing Role: Redundant fault detector paired with MAX11068 measurement IC; validates voltage readings before BMS action. Use Value: Dual-fault detection architecture meets ASIL-B requirements; daisy-chain alarm propagation ensures no single-point failure silences warning. |
| High-Power UPS Backup System | Solar-Storage Hybrid Battery Pack |
Use Scenario: 24S Li-ion backup for datacenter UPS with 72V nominal bus and strict uptime requirements. IC Role / Device Role / Timing Role: Standby-mode fault monitor drawing only 80µA; detects cell imbalance during float charging. Use Value: Enables >10-year field life with minimal self-discharge impact; shutdown mode (2µA) extends shelf-life during storage. |
Use Scenario: 16S NMC battery in off-grid solar installation exposed to desert temperature cycling (–30°C to +70°C ambient). IC Role / Device Role / Timing Role: Temperature-compensated OV/UV detection with guaranteed ±25mV/±100mV accuracy from –40°C to +105°C junction. Use Value: Maintains protection integrity across extreme environments where conventional monitors drift beyond safe limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery fault-monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX11081GUU+ | Hysteresis reduced to 37.5mV; otherwise identical pinout, thresholds, and daisy-chain functionality. | Better suited for high-precision cell balancing where tighter OV/UV window detection is required. | Select MAX11081GUU+ when lower hysteresis improves response to marginal overvoltage events without increasing false alarms. |
| BQ7695203RGER | Integrated ADC, coulomb counter, and host interface (I²C); higher integration but no daisy-chain alarm bus. | Requires isolated communication per module; lacks native ALRML/ALRMU cascade for large stacks. | Choose BQ7695203RGER when system needs telemetry and host-controlled diagnostics instead of autonomous fault propagation. |
Compared with MAX11080GUU+, MAX11081GUU+ offers finer hysteresis resolution for sensitive fault detection, while BQ7695203RGER trades daisy-chain simplicity for richer telemetry - making MAX11080GUU+ optimal for cost-sensitive, high-reliability stacked-battery safety layers.
Availability
MAX11080GUU+ is available at Aetrix Electronics and suitable for electric vehicle traction batteries, hybrid electric vehicle energy storage, and high-power uninterruptible power supplies requiring stable component supply across extended automotive and industrial lifecycles.
Supply support for MAX11080GUU+ 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 precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX11080GUU+ belongs to Maxim's high-voltage battery monitoring product line, engineered specifically for redundant, ultra-low-power fault detection in multicell Li+ battery packs - complementing the MAX11068 measurement IC in safety-critical BMS architectures.
FAQ
What is the maximum number of MAX11080GUU+ devices that can be daisy-chained?
The MAX11080GUU+ supports up to 31 devices in a daisy-chain configuration using its ALRML and ALRMU pins. This architecture eliminates the need for optocouplers or digital isolators between modules, reducing system cost and board space while maintaining robust fault propagation across high-voltage battery stacks. Each MAX11080GUU+ passes or blocks the heartbeat signal based on local cell status, enabling hierarchical alarm reporting.
How does the MAX11080GUU+ achieve ±25mV overvoltage detection accuracy over temperature?
The MAX11080GUU+ achieves ±25mV overvoltage detection accuracy from –40°C to +105°C through trimmed bandgap references, matched comparator input stages, and factory calibration of threshold-setting circuitry. This specification is guaranteed across the full operating temperature range - not just at +25°C - ensuring consistent overcharge protection in automotive under-hood or outdoor energy storage environments where thermal stress is severe.
Can the undervoltage detection function be disabled on the MAX11080GUU+?
Yes, undervoltage detection on the MAX11080GUU+ can be fully disabled by setting UVSEL0, UVSEL1, and UVSEL2 to logic low (000). This configuration disables the undervoltage comparator path while preserving overvoltage monitoring and daisy-chain functionality. The setting is latched at power-up, preventing accidental re-enablement during operation - a critical feature for applications where UV faults are managed externally or not required.
What is the purpose of the CD pin on the MAX11080GUU+ and how is it configured?
The CD pin on the MAX11080GUU+ controls the programmable alarm delay time via an external capacitor (15nF–16.5µF). An internal 6.1µA current source charges the capacitor until it reaches a 1.23V threshold, triggering the ALRML alarm output. This RC-based timing allows precise, adjustable fault persistence filtering - for example, a 100nF capacitor yields ~20ms delay - ensuring transient spikes do not falsely activate safety shutdowns in noisy battery environments.
Is the MAX11080GUU+ qualified for automotive applications?
Yes, the MAX11080GUU+ is AEC-Q100 qualified to Type 2 standards (–40°C to +105°C), confirming its reliability for automotive use cases including electric vehicle traction batteries and hybrid powertrain energy storage. Its 38-pin TSSOP package, 72V absolute maximum DCIN rating, and integrated charge pump for level-shifted daisy-chain signaling meet stringent automotive EMC, thermal, and functional safety requirements - making it suitable for ASIL-B–capable BMS designs.
MAX11080GUU+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 38-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 1 ~ 12
- Fault Protection:
- Over/Under Voltage
- Interface:
- -
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-TSSOP
MAX11080GUU+ FAQ
1.How can I place an order for MAX11080GUU+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11080GUU+ 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 MAX11080GUU+ reliable?
The price and inventory of MAX11080GUU+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11080GUU+ is usually 5 days.
3.What payment methods are accepted for MAX11080GUU+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11080GUU+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11080GUU+?
MAX11080GUU+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11080GUU+ 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 MAX11080GUU+?
For technical support, including MAX11080GUU+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11080GUU+ requirements.
6.How does Aetrix verify that MAX11080GUU+ is sourced from the original manufacturer or authorized distributors?
All MAX11080GUU+ 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 MAX11080GUU+ meets industry standards.
7.What is the process for return or replacement of MAX11080GUU+?
All MAX11080GUU+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11080GUU+, 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 MAX11080GUU+ part is unused and in its original packaging.
Return procedure for MAX11080GUU+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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