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Analog Devices Inc./Maxim Integrated MAX17303G+
- Part No.:
- MAX17303G+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
MAX17303G+.pdf
- Description:
- MODEL GAUGE M5 1S TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:525
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Product details
Overview
The MAX17303G+ from Analog Devices is a stand-alone 1-cell Li-ion/polymer fuel gauge IC with integrated protector, SHA-256 authentication, and ModelGauge m5 algorithm. It monitors voltage, current, temperature, and state-of-charge (SOC) with ±1% SOC accuracy, 24µA active quiescent current, and dynamic power estimation-enabling precise battery management in space-constrained wearables and medical devices.
For engineers reviewing the MAX17303G+ datasheet, MAX17303G+ pinout, MAX17303G+ application, or MAX17303G+ equivalent, this page delivers verified technical context, validated pin functions, real-world use cases for smart batteries, and confirmed alternative parts with documented functional and application differences.
Technical Context
The MAX17303G+ implements a dual-sensing architecture: coulomb counting for short-term capacity tracking and open-circuit voltage (OCV)-based modeling for long-term stability, fused via ModelGauge m5 EZ. It supports JEITA-compliant charging prescriptions and zero-volt charging, with protection thresholds configurable via I²C registers including nVPrtTh1 (overvoltage), nIPrtTh1 (overcurrent), and nTPrtTh1 (temperature).
Protection logic uses external high-side N-FETs controlled by CHG and DIS pins, enabling ideal diode discharge during charge faults and fast/slow overcurrent detection. Authentication leverages a 160-bit secret key and unique 64-bit ID, while nonvolatile memory stores 122 bytes of user data and 100-cycle life logs without host intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| SOC Accuracy | ±1% over full temperature and SoC range-enables reliable low-battery warnings and runtime prediction without factory calibration. |
| Quiescent Current | 24µA (FETs enabled), 5µA (ship mode)-extends shelf life and reduces standby drain in sealed battery packs. |
| Interface | I²C (2-wire) or 1-Wire®-supports simple host communication with minimal PCB routing and no dedicated UART or SPI controller required. |
| Protection Functions | Over/undervoltage, over/undertemperature, overcurrent, short-circuit, overcharge, internal self-discharge detection-eliminates need for discrete protection ICs in single-cell designs. |
| Authentication | SHA-256 with 160-bit secret key + unique 64-bit ID-prevents unauthorized battery pack cloning in premium portable devices. |
| Dynamic Power | Real-time max output power calculation-allows system host to throttle load before violating minimum input voltage, avoiding brownouts. |
| Package | 3mm × 3mm, 14-pin TDFN-EP-fits compact battery pack PCBs with thermal pad for efficient heat dissipation during FET switching. |
Pinout & Package
The MAX17303G+ is housed in a lead-free, thermally enhanced 14-pin TDFN-EP package (3mm × 3mm, 0.5mm pitch) with exposed pad (EP) for grounding and thermal conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PK+ | Battery pack positive terminal | High-side connection point for battery cell anode; routes current through external CHG/DIS FETs. |
| PK− | Battery pack negative terminal | Reference node for all voltage/current measurements; connects to CSP/CSN sense resistors and GND. |
| CSP / CSN | Coulomb counter sense inputs | Differential inputs across sense resistor (0.5–10mΩ); enables ±1mA current measurement resolution. |
| CHG / DIS | High-side N-FET gate drivers | Open-drain outputs controlling external FETs; DIS disables discharge path, CHG controls charge path independently. |
| ALRT/PIO | Programmable interrupt/output | Configurable as alert (e.g., SOC < 5%, fault condition) or general-purpose I/O for system wake-up signaling. |
| SDA / SCL | I²C bidirectional data/clock | Standard 2-wire interface supporting 400kHz operation; allows full register access and configuration without additional protocol overhead. |
| TH | Thermistor input | Analog input for NTC thermistor (10kΩ typical); supports JEITA temperature profiling and over/undertemperature cutoff. |
| GND / EP | Ground reference & thermal pad | Primary ground return and thermal conduction path; EP must be soldered to PCB copper pour for thermal compliance. |
Key Features
| Feature | Design Value |
|---|---|
| ModelGauge m5 EZ algorithm | Delivers ±1% SOC accuracy across aging, temperature, and discharge rate-no learning cycles or host-side modeling required. |
| SHA-256 authentication | Prevents counterfeit battery insertion via cryptographic challenge-response using device-unique 64-bit ID and programmable 160-bit key. |
| Dynamic power estimation | Calculates instantaneous max deliverable power (W) based on real-time impedance and voltage-enables adaptive system load management. |
| Nonvolatile history logging | Stores 100 entries of cycle count, full-capacity decay, temperature profiles, and fault events-supports field failure analysis without cloud connectivity. |
| Pushbutton wakeup | Wakes device from deep-ship mode (0.02µA) on mechanical button press-eliminates always-on system power consumption in battery-powered IoT endpoints. |
Applications
| Smart Wearables | Medical Monitoring Devices |
|---|---|
Use Scenario: Compact smartwatch with multi-day battery life requiring accurate remaining runtime and low-power shutdown. IC Role / Device Role / Timing Role: Stand-alone fuel gauge and protector managing single-cell Li-ion pack, performing autonomous SOC updates every 10 seconds. Use Value: ±1% SOC accuracy extends perceived battery life by eliminating premature shutdown; 0.02µA DeepShip mode preserves charge during 12-month shelf storage. | Use Scenario: Portable ECG monitor used intermittently over multi-year service life, needing traceable battery health and anti-counterfeit assurance. IC Role / Device Role / Timing Role: Battery-side security and telemetry agent-logging cycle count, capacity fade, and authenticating pack origin via SHA-256 handshake. Use Value: Cycle+™ age forecasting predicts end-of-life within ±3 months; nonvolatile 100-entry log meets FDA audit requirements for field reliability data. |
| Digital Action Cameras | Smart Battery Packs |
Use Scenario: High-drain 4K video camera drawing burst currents >2A, requiring stable voltage under dynamic load. IC Role / Device Role / Timing Role: Real-time dynamic power estimator feeding host MCU with safe max power envelope at 100ms intervals. Use Value: Prevents brownout-induced video corruption by throttling encoder clock before VMIN violation-no external voltage supervisor needed. | Use Scenario: Replaceable battery module for industrial handheld scanner, requiring tamper-proof identification and JEITA-compliant charging. IC Role / Device Role / Timing Role: Pack-integrated protector enforcing JEITA temperature zones (nJEITACfg register) and zero-volt charging (ZVC pin support). Use Value: Eliminates need for host-side thermal management logic; SHA-256 authentication blocks third-party packs that bypass safety firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fuel gauge with protector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ28Z610R1YFFR | TI fuel gauge with integrated protector; supports 2-cell stacks and SMBus interface only-no 1-Wire option. | Targeted at industrial tools and power tools with higher voltage packs; lacks SHA-256 authentication and internal self-discharge detection. | Select when multi-cell support and SMBus ecosystem integration outweigh need for cryptographic security and ultra-low ship current. |
| MAX17205G+T | Legacy Maxim fuel gauge (ModelGauge m3); no SHA-256, no JEITA charging prescription, 35µA active IQ vs. 24µA. | Used in cost-sensitive consumer electronics where clone resistance and advanced charging control are not required. | Choose only for legacy design refreshes; lacks dynamic power estimation, Cycle+ age forecasting, and modern authentication required for medical/wearable certification. |
Compared with BQ28Z610R1YFFR and MAX17205G+T, the MAX17303G+ uniquely combines cryptographic pack authentication, JEITA-compliant charging control, and ±1% SOC accuracy in a 3mm × 3mm footprint-making it optimal for next-generation smart batteries where security, longevity, and precision are co-prioritized.
Availability
The MAX17303G+ is available at Aetrix Electronics and suitable for smartphones, medical monitors, and smart wearables requiring stable component supply, long-term lifecycle support, and guaranteed authentic sourcing.
Supply support for MAX17303G+ 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 Maxim Integrated in 2021) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies.
The MAX1730x family is designed for secure, autonomous battery management in compact, safety-critical portable systems-emphasizing accuracy, low power, and cryptographic integrity over host dependency.
FAQ
What is the primary function of the MAX17303G+ in a battery pack?
The MAX17303G+ serves as a stand-alone fuel gauge and protector for 1-cell Li-ion/polymer batteries. It autonomously measures voltage, current, and temperature; computes state-of-charge with ±1% accuracy using ModelGauge m5 EZ; enforces safety limits via external FETs; and provides SHA-256 authentication to prevent cloning. The MAX17303G+ requires no host microcontroller for basic operation.
Does the MAX17303G+ support both I²C and 1-Wire interfaces simultaneously?
No-the MAX17303G+ supports either I²C (2-wire) or 1-Wire® interface, selected at power-up via the SCL pin state. When SCL is pulled high during reset, the device initializes in I²C mode; when floating or low, it defaults to 1-Wire. Both modes provide full register access, but only one can be active per power cycle. The MAX17303G+ does not time-multiplex or auto-switch between protocols.
How does the MAX17303G+ handle battery aging compensation?
The MAX17303G+ automatically compensates for aging using its ModelGauge m5 algorithm, which tracks full-capacity decay (FullCapRep register), cycle count (Cycles register), and impedance rise (RCell register). It applies Cycle+™ forecasting to predict remaining useful life within ±3 months and adjusts SOC calculations in real time-no manual recalibration or host intervention is required. This aging model is embedded in the MAX17303G+ silicon and operates continuously in background.
What protection features are configurable via registers in the MAX17303G+?
The MAX17303G+ allows full configuration of overvoltage (nVPrtTh1/nVPrtTh2), overcurrent (nIPrtTh1, nODSCTh), temperature (nTPrtTh1–nTPrtTh3), JEITA charging (nJEITAV/nJEITACfg), and fault timing (nDelayCfg) thresholds via I²C. All protection actions-including CHG/DIS FET disable, ALRT assertion, and fault logging-are triggered autonomously. Configuration persists in nonvolatile memory after write, ensuring consistent behavior across power cycles.
Is the MAX17303G+ pin-compatible with other members of the MAX1730x family?
Yes-the MAX17303G+ shares identical pinout and package (14-pin TDFN-EP) with MAX17300G+, MAX17301G+, and MAX17302G+. Functional differences exist (e.g., internal self-discharge detection is only in MAX17300/MAX17310; SHA-256 is standard across MAX17300–MAX17303), but PCB layout and interconnect are fully interchangeable. Firmware and register maps are also backward-compatible within the MAX1730x series.
MAX17303G+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- ModelGauge™
- Package/Case:
- 14-WFDFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Fuel Gauge
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1
- Fault Protection:
- Over Current, Over Temperature, Over/Under Voltage, Short Circuit
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TDFN (3x3)
MAX17303G+ FAQ
1.How can I place an order for MAX17303G+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17303G+ 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 MAX17303G+ reliable?
The price and inventory of MAX17303G+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17303G+ is usually 5 days.
3.What payment methods are accepted for MAX17303G+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17303G+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17303G+?
MAX17303G+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17303G+ 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 MAX17303G+?
For technical support, including MAX17303G+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17303G+ requirements.
6.How does Aetrix verify that MAX17303G+ is sourced from the original manufacturer or authorized distributors?
All MAX17303G+ 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 MAX17303G+ meets industry standards.
7.What is the process for return or replacement of MAX17303G+?
All MAX17303G+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17303G+, 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 MAX17303G+ part is unused and in its original packaging.
Return procedure for MAX17303G+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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