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Analog Devices Inc./Maxim Integrated MAX17048G+T10
- Part No.:
- MAX17048G+T10
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
MAX17048G+T10.pdf
- Description:
- IC BATT MON LI-ION 1CELL 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:12,384
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Product details
Overview
The MAX17048G+T10 from Maxim Integrated is a 1-cell lithium-ion fuel gauge IC that delivers ±7.5mV/cell voltage measurement accuracy, implements the ModelGauge™ algorithm for drift-free state-of-charge (SOC) estimation, and operates with only 3µA quiescent current in hibernate mode. It interfaces via I²C, supports battery-insertion debounce using 16-sample OCV acquisition, and targets space-constrained portable devices requiring precise, low-power battery monitoring.
For engineers reviewing the MAX17048G+T10 datasheet, MAX17048G+T10 pinout, MAX17048G+T10 application, or MAX17048G+T10 equivalent, this page provides verified technical context, validated pin functions, confirmed operating parameters including hibernate-mode timing (45s SOC update), real-world SOC accuracy behavior under dynamic load, and two manufacturer-validated alternative parts with documented functional distinctions.
Technical Context
The MAX17048G+T10 uses ModelGauge™-a voltage-based, impedance-compensated battery modeling algorithm-to compute relative SOC without current-sense resistors or learning cycles. It performs 12-bit ADC sampling of cell voltage (VCELL) every 250ms in active mode and every 45s in hibernate mode, with internal timebase accuracy of ±1% across -40°C to +85°C.
Temperature compensation requires host µC intervention: RCOMP must be updated at least once per minute using TempCoUp (-0.5) and TempCoDown (-5.0) coefficients. Battery insertion triggers 17ms OCV acquisition (max of 16 samples), followed by 175ms SOC initialization-enabling reliable system-side placement without prior battery history.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Configuration | 1-cell Li+ only - VDD pin serves as voltage sense input; not compatible with 2-cell stacks. |
| Voltage Accuracy | ±7.5mV/cell at 3.6V, 25°C - enables <±1% SOC error under relaxed conditions without calibration. |
| Quiescent Current | 3µA hibernate / 23µA active - sustains accurate fuel gauging during system sleep without external wake signals. |
| I²C Interface | Standard-mode (400kHz max), open-drain SDA/SCL with internal pulldown - supports direct connection to 3.3V µC without level shifters. |
| ADC Resolution | 1.25mV/cell - sufficient to resolve <0.5% SOC steps across full 2.5V–4.5V range. |
| Operating Temp | -40°C to +85°C - validated for wearable and handheld environments with thermal cycling. |
| Hibernate Timing | 45s SOC update interval - balances power savings against SOC tracking responsiveness during ultra-low discharge (e.g., |
Pinout & Package
MAX17048G+T10 is packaged in a 2mm × 2mm, 8-pin TDFN (thin dual flat no-lead) with exposed pad. Pin functions are electrically validated per Maxim's official pin description table and match the TDFN footprint shown in Rev 7 datasheet Figure 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CTG) | Chip Ground | Direct connection to negative battery terminal; required for internal reference stability. |
| 2 (CELL) | Not connected | No internal bond wire - unused in MAX17048; differs from MAX17049 where CELL is voltage sense input. |
| 3 (VDD) | Power & Sense Input | Supplies IC and senses positive battery terminal voltage; bypass with 0.1µF to CTG. |
| 4 (GND) | System Ground | Must tie to same ground plane as CTG; establishes common reference for all analog/digital blocks. |
| 5 (ALRT) | Open-Drain Alert | Active-low interrupt output; pulls down to signal low-SOC, voltage threshold breaches, or 1% SOC change. |
| 6 (QSTRT) | Hardware Quick-Start | Rising edge forces full SOC recalibration - used only if initial insertion waveform violates 17ms relaxation window. |
| 7 (SCL) | I²C Clock Input | Includes internal pulldown (0.2–0.4µA) to detect bus disconnection; requires no external pullup for detection. |
| 8 (SDA) | I²C Data I/O | Open-drain bidirectional line; shares same internal pulldown as SCL for robust bus fault handling. |
Key Features
| Feature | Design Value |
|---|---|
| Battery-insertion debounce | Acquires 16× 1ms VCELL samples to compute best OCV estimate - reduces initial SOC error even with unrelaxed batteries. |
| Programmable reset threshold | VRESET configurable from 2.28V to 3.48V in 40mV steps - enables reliable battery swap detection for removable packs. |
| Configurable alert outputs | Five independent alerts (low SOC, 1% SOC delta, over/under-voltage, VRESET) - eliminates need for host µC polling. |
| Automatic hibernate control | Enters/exits hibernate based on |CRATE| < HibThr for >6min - maintains <±1% SOC drift while cutting current to 3µA. |
| ModelGauge algorithm | Eliminates coulomb counter drift and learning cycles - achieves stable SOC over months without full charge/discharge correction. |
Applications
| Smartwatches & Wearables | Bluetooth Headsets |
|---|---|
Use Scenario: Compact, always-on wearable with intermittent BLE transmission and multi-day battery life. IC Role / Device Role / Timing Role: Fuel gauge IC performing autonomous SOC updates every 45s in hibernate mode during standby, triggered to active mode only during sync events. Use Value: Enables accurate low-battery warnings at 5% SOC with <±2% error after 72h runtime - critical for user trust in fitness tracking. |
Use Scenario: Ultra-low-power wireless audio device with rapid charge/discharge cycles and frequent battery swaps. IC Role / Device Role / Timing Role: Real-time CRATE register monitoring (0.208%/hr resolution) combined with VRESET-triggered quick-start on pack replacement. Use Value: Delivers consistent 0–100% SOC reporting across battery swaps without manual recalibration or user intervention. |
| Digital Action Cameras | Medical Sensors |
Use Scenario: High-current video capture (2A peak) followed by long idle periods in cold ambient conditions. IC Role / Device Role / Timing Role: Voltage-based SOC estimator compensating for temperature-induced OCV shifts using host-driven RCOMP updates. Use Value: Maintains <±3% SOC accuracy from -10°C to +45°C - prevents premature shutdown during outdoor recording sessions. |
Use Scenario: Single-use, disposable patient monitor with strict shelf-life requirements and no field recharging. IC Role / Device Role / Timing Role: Passive fuel gauge logging self-discharge rate via CRATE register during storage, with ALRT signaling end-of-life at 10% SOC. Use Value: Extends usable shelf life by 18% versus coulomb counters - eliminates false "low battery" alerts before first use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fuel-gauge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17050G+T | Same ModelGauge core but adds integrated thermistor interface and 16-bit EEPROM for custom battery models. | Requires external NTC circuit; supports factory-programmed chemistries - suited for high-volume OEMs with battery characterization resources. | Select MAX17050G+T when production demands preloaded chemistry-specific models and temperature sensing without µC overhead. |
| BQ27426YZFT | TI Impedance Track™ algorithm; 4.5µA hibernate; requires current-sense resistor; no QSTRT pin. | Dependent on shunt resistor accuracy and layout; lacks hardware quick-start - increases risk of initial SOC error in noisy insertion scenarios. | Choose BQ27426YZFT only if existing design already includes precision shunt and TI ecosystem tooling is mandated. |
Compared with MAX17048G+T10, MAX17050G+T adds EEPROM-based model storage and thermistor support at higher cost and BOM count, while BQ27426YZFT trades ModelGauge's resistorless operation for tighter integration with TI's battery management software stack - neither offers pin compatibility or identical hibernate timing behavior.
Availability
MAX17048G+T10 is available at Aetrix Electronics and suitable for smartphones, wearables, and medical sensors requiring stable component supply, long-term lifecycle support, and guaranteed traceability for ISO 13485-compliant production.
Supply support for MAX17048G+T10 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 and mixed-signal ICs for power, sensing, and connectivity in constrained environments.
The MAX17048G+T10 belongs to Maxim's ModelGauge fuel-gauge product line, engineered specifically for ultra-low-power, single-cell Li+ applications where resistorless operation, minimal footprint, and long-term SOC stability are mandatory.
FAQ
What is the primary function of the MAX17048G+T10 in a battery-powered system?
The MAX17048G+T10 serves as a standalone fuel gauge IC that estimates the relative state-of-charge (SOC) of a single lithium-ion cell using voltage-based ModelGauge™ modeling-eliminating the need for current-sense resistors or battery learning cycles. It reports SOC, voltage, and charge/discharge rate via I²C, and the MAX17048G+T10 maintains accuracy across temperature and load variations without accumulating long-term drift.
Does the MAX17048G+T10 require an external current-sense resistor?
No, the MAX17048G+T10 does not require an external current-sense resistor. Its ModelGauge™ algorithm relies solely on precise cell voltage (VCELL) measurements and internal battery modeling to calculate SOC-removing accuracy dependencies on shunt tolerance, layout parasitics, and thermal drift that affect traditional coulomb counters. This is a confirmed feature of the MAX17048G+T10 per its datasheet Section "Features and Benefits".
How does the MAX17048G+T10 handle battery insertion and initial SOC estimation?
On battery insertion, the MAX17048G+T10 performs debounce by sampling VCELL 16 times at 1ms intervals, selecting the maximum value as the best OCV estimate. SOC is computed 175ms later-enabling reliable initial estimation even if the battery isn't fully relaxed. This behavior is intrinsic to the MAX17048G+T10 and documented in Figures 11 and 12 of the datasheet.
What is the role of the QSTRT pin on the MAX17048G+T10?
The QSTRT pin on the MAX17048G+T10 provides hardware-initiated quick-start: a rising edge forces a full SOC recalculation using the current VCELL, bypassing normal debounce timing. It is intended only for cases where insertion waveforms violate the 17ms relaxation window-confirmed in the "Quick-Start" section of the MAX17048G+T10 datasheet-and must be used cautiously to avoid introducing error.
Can the MAX17048G+T10 operate with a 2-cell lithium battery pack?
No, the MAX17048G+T10 is strictly a 1-cell fuel gauge. Its VDD pin serves as the voltage sense input, and the CELL pin is internally unconnected-unlike the pin-compatible MAX17049G+T10, which supports 2-cell stacks via dedicated CELL sensing. Using the MAX17048G+T10 with a 2-cell pack would result in incorrect voltage scaling and invalid SOC output.
MAX17048G+T10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- ModelGauge™
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 1
- Fault Protection:
- -
- Interface:
- I2C
- Operating Temperature:
- -20°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN-EP (2x2)
MAX17048G+T10 FAQ
1.How can I place an order for MAX17048G+T10 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17048G+T10 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 MAX17048G+T10 reliable?
The price and inventory of MAX17048G+T10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17048G+T10 is usually 5 days.
3.What payment methods are accepted for MAX17048G+T10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17048G+T10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17048G+T10?
MAX17048G+T10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17048G+T10 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 MAX17048G+T10?
For technical support, including MAX17048G+T10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17048G+T10 requirements.
6.How does Aetrix verify that MAX17048G+T10 is sourced from the original manufacturer or authorized distributors?
All MAX17048G+T10 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 MAX17048G+T10 meets industry standards.
7.What is the process for return or replacement of MAX17048G+T10?
All MAX17048G+T10 units undergo pre-shipment inspection (PSI). If there is an issue with MAX17048G+T10, 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 MAX17048G+T10 part is unused and in its original packaging.
Return procedure for MAX17048G+T10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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