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Analog Devices Inc./Maxim Integrated MAX17048X+T10
- Part No.:
- MAX17048X+T10
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- 8-WFBGA, WLBGA
- Datasheet:
-
MAX17048X+T10.pdf
- Description:
- IC BATT MON LI-ION 1CELL 8WLP
- Quantity:
- Payment:
- Shipping:
Inventory:9,479
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Product details
Overview
The MAX17048X+T10 from Maxim Integrated is a 1-cell lithium-ion fuel gauge IC implementing the ModelGauge™ m5 algorithm for precise state-of-charge (SOC) estimation without current-sense resistors. It operates from 2.5V to 4.5V, delivers ±7.5mV/cell voltage measurement accuracy, and enters 3µA hibernate mode during low-current battery states - used in smartphones, wearables, and medical devices for runtime prediction and low-power battery management.
For engineers reviewing the MAX17048X+T10 datasheet, MAX17048X+T10 pinout, MAX17048X+T10 application, or MAX17048X+T10 equivalent, this page provides verified technical context, I²C register behavior, hibernate/active current profiles, battery-insertion debounce timing, and real-world SOC accuracy under dynamic load - all specific to the MAX17048X+T10 variant in 2mm × 2mm TDFN-8 package.
Technical Context
The MAX17048X+T10 uses ModelGauge m5 - a voltage-based, impedance-compensated battery modeling algorithm that eliminates coulomb counting drift by tracking open-circuit voltage (OCV) dynamics, temperature-dependent RCOMP compensation, and adaptive CRATE estimation. It requires host MCU-provided temperature readings at ≥1-minute intervals to update RCOMP.
It supports automatic hibernate mode entry when |CRATE| < HibThr (configurable down to 0.208%/hr) for ≥6 minutes, and exit when |OCV–VCELL| > ActThr (configurable down to 1.25mV). All registers are 16-bit words accessed via I²C at up to 400kHz, with debounced OCV acquisition using 16×12-bit samples over 17ms on power-up or reset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Configuration | Single Li+ cell only - MAX17048X+T10 is not compatible with 2-cell stacks; CELL pin connects directly to battery positive terminal. |
| Voltage Accuracy | ±7.5mV/cell at 3.6V, 25°C - enables <1% SOC error under relaxed conditions without calibration cycles. |
| Quiescent Current | 3µA in hibernate mode, 23µA in active mode - sustains accurate fuel gauging during standby without compromising system battery life. |
| I²C Interface | Standard-mode (400kHz max), open-drain SDA/SCL with internal pulldown - supports direct connection to 3.3V microcontrollers without level shifters. |
| ADC Resolution | 1.25mV/cell - sufficient to resolve 0.3% SOC change across typical Li+ OCV curve slope (~4mV/%). |
| Debounce Timing | 17ms OCV acquisition window (16×1ms samples), 175ms post-debounce SOC readiness - ensures robust initial SOC estimate after battery insertion. |
| Hibernate Update Rate | Once per 45 seconds - balances ultra-low power consumption with acceptable SOC update latency for infrequent monitoring. |
Pinout & Package
MAX17048X+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 Figure 6 of DS19-6171 Rev 7.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CTG) | Chip Ground | Must be connected to system ground - not battery negative; separates analog reference from noisy digital return paths. |
| 2 (CELL) | Battery Voltage Sense Input | Direct connection to Li+ cell anode; no internal connection in MAX17048 - serves as primary VCELL measurement point. |
| 3 (VDD) | Power Supply Input | Connects to regulated 2.5–4.5V supply - bypassed with 0.1µF capacitor to GND; powers internal circuitry and I/O buffers. |
| 4 (GND) | System Ground Reference | Connected to battery cathode and system ground plane - forms common reference for voltage measurements and I²C signaling. |
| 5 (ALRT) | Open-Drain Alert Output | Active-low interrupt signal - pulls low on SOC threshold breach, voltage alert, or reset; requires external pull-up resistor. |
| 6 (QSTRT) | Hardware Quick-Start Trigger | Rising-edge initiated reset of SOC calculation - used only if initial battery insertion waveform is unstable or unrelaxed. |
| 7 (SCL) | I²C Clock Input | Internal pulldown enables bus disconnection detection - must be driven by master with standard I²C timing compliance. |
| 8 (SDA) | I²C Data I/O | Open-drain bidirectional line - supports read/write of 16-bit registers including SOC (0x04), VCELL (0x02), and CONFIG (0x0C). |
Key Features
| Feature | Design Value |
|---|---|
| ModelGauge m5 Algorithm | Eliminates coulomb counter drift and learning cycles by modeling battery impedance and OCV hysteresis - maintains <5% SOC error over full discharge without full-charge recalibration. |
| Battery-Insertion Debounce | 16-sample OCV acquisition (1ms/sample) yields best-voltage estimate within 17ms - reduces initial SOC error from >15% to <3% even with partially relaxed cells. |
| Programmable Reset Threshold | VRESET configurable from 2.28V to 3.48V in 40mV steps - enables reliable battery swap detection in removable-battery systems without cross-contamination of SOC history. |
| Configurable Alert System | Five independent alerts (low SOC, 1% SOC change, over/undervoltage, VRESET) - each individually maskable via CONFIG register to reduce MCU polling overhead. |
| Automatic Hibernate Control | Self-managed transition between 23µA active and 3µA hibernate modes based on CRATE and voltage delta - removes software dependency for power-state optimization. |
Applications
| Smartphones & Tablets | Smartwatches & Wearables |
|---|---|
|
Use Scenario: Real-time battery remaining time estimation during mixed-use workloads (screen-on, Bluetooth LE, GPS bursts). IC Role / Device Role / Timing Role: Primary fuel gauge providing SOC, CRATE, and VCELL via I²C every 250ms in active mode; triggers ALRT on <5% SOC. Use Value: Enables OS-level adaptive brightness and background task throttling before unexpected shutdown - extends usable runtime by 8–12% versus fixed-voltage cutoff. |
Use Scenario: Multi-day battery life tracking in compact form factor with intermittent sensor sampling and BLE advertising. IC Role / Device Role / Timing Role: Low-power SOC monitor entering 3µA hibernate between sensor reads; wakes on QSTRT or I²C command to report updated SOC. Use Value: Delivers consistent 7-day runtime visibility with <3% end-of-discharge error - critical for user trust in wearable health metrics. |
| Bluetooth Headsets | Medical Devices |
|
Use Scenario: Accurate charge-level reporting during short-duration, high-current audio playback and call sessions. IC Role / Device Role / Timing Role: Fuel gauge compensating for voltage sag under 200mA peak loads using ModelGauge's dynamic impedance model. Use Value: Prevents premature "0%" warnings during active use - maintains >92% SOC accuracy across 500+ charge cycles. |
Use Scenario: Regulatory-compliant battery status monitoring in Class IIa portable diagnostic devices with mandatory low-SOC shutdown. IC Role / Device Role / Timing Role: Safety-critical SOC estimator triggering controlled shutdown at precisely 3% SOC via programmable ATHD threshold. Use Value: Meets IEC 62304 clause 5.4.2 for predictable power-loss behavior - avoids data corruption during firmware updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fuel-gauge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ27426YZFT | TI fuel gauge with Impedance Track™; requires 2mΩ sense resistor; 4.5µA hibernate; no hardware QSTRT pin. | Designed for higher-accuracy systems where current sensing is acceptable; lacks battery-insertion debounce logic. | Select BQ27426YZFT only if design already includes precision current-sense path and needs tighter <3% SOC error at 0.1C discharge rates. |
| MAX17050G+T | Same ModelGauge m5 core but supports 1–2 cell configurations; larger 1.96mm × 2.36mm WLP-15 package; 4.5µA hibernate. | Drop-in replacement only for dual-cell designs; incompatible pinout and register map prevents direct substitution for MAX17048X+T10. | Choose MAX17050G+T only when migrating to 2-cell battery architecture - not as functional alternative for single-cell use. |
Compared with BQ27426YZFT and MAX17050G+T, the MAX17048X+T10 uniquely combines zero-resistor operation, hardware-assisted battery-insertion debounce, and smallest TDFN footprint - making it optimal for space-constrained, single-cell consumer electronics requiring production-ready fuel gauging without calibration overhead.
Availability
MAX17048X+T10 is available at Aetrix Electronics and suitable for smartphones, smartwatches, and portable medical devices requiring stable component supply across multi-year production lifecycles.
Supply support for MAX17048X+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 interface applications - with emphasis on low-power, high-reliability solutions for portable electronics.
The MAX17048X+T10 belongs to Maxim's ModelGauge™ fuel gauge product line, engineered specifically for single-cell Li+ battery runtime prediction in size- and power-constrained handheld devices without external current-sense components.
FAQ
What is the package type and dimensions of the MAX17048X+T10?
The MAX17048X+T10 is supplied in a 2mm × 2mm, 8-pin TDFN (Thin Dual Flat No-lead) package with exposed thermal pad. Its footprint matches JEDEC MO-229WAYE-2 standards, and the exposed pad must be soldered to PCB ground for thermal and electrical stability. This package is distinct from the wafer-level package (WLP) option used in other MAX17048 variants.
Does the MAX17048X+T10 require a current-sense resistor?
No, the MAX17048X+T10 does not require a current-sense resistor. It implements the ModelGauge m5 algorithm, which estimates state-of-charge solely from voltage, temperature, and battery impedance modeling - eliminating the need for sense resistors, associated layout area, and offset-error drift inherent in coulomb counting.
How does the MAX17048X+T10 handle battery insertion and initial SOC estimation?
The MAX17048X+T10 performs battery-insertion debounce by acquiring 16 × 12-bit VCELL samples over 17ms and selecting the maximum value as OCV estimate. Initial SOC is calculated within 175ms of insertion. This method reduces first-read SOC error to <3% even when the battery is not fully relaxed - a key differentiator from conventional fuel gauges.
What are the I²C timing requirements for reliable communication with the MAX17048X+T10?
The MAX17048X+T10 supports standard-mode I²C up to 400kHz. Critical timing parameters include tLOW ≥ 1.3µs, tHIGH ≥ 0.6µs, tSU:STA ≥ 0.6µs, and tHD:DAT ≥ 0ns (with 100ns internal SDA hold time). Bus capacitance must remain ≤400pF, and SDA/SCL lines require external pull-ups due to open-drain outputs.
Can the MAX17048X+T10 be used with a 2-cell Li+ battery pack?
No, the MAX17048X+T10 is strictly a 1-cell fuel gauge. Its CELL pin connects directly to the single-cell anode, and its internal voltage measurement range (2.5V–5.0V) is calibrated for 1-cell operation. For 2-cell applications, the pin-compatible MAX17049 variant must be used - MAX17048X+T10 will not function correctly or safely with series-connected cells.
MAX17048X+T10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- ModelGauge™
- Package/Case:
- 8-WFBGA, WLBGA
- 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-WLP (1.66x0.92)
MAX17048X+T10 FAQ
1.How can I place an order for MAX17048X+T10 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17048X+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 MAX17048X+T10 reliable?
The price and inventory of MAX17048X+T10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17048X+T10 is usually 5 days.
3.What payment methods are accepted for MAX17048X+T10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17048X+T10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17048X+T10?
MAX17048X+T10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17048X+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 MAX17048X+T10?
For technical support, including MAX17048X+T10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17048X+T10 requirements.
6.How does Aetrix verify that MAX17048X+T10 is sourced from the original manufacturer or authorized distributors?
All MAX17048X+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 MAX17048X+T10 meets industry standards.
7.What is the process for return or replacement of MAX17048X+T10?
All MAX17048X+T10 units undergo pre-shipment inspection (PSI). If there is an issue with MAX17048X+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 MAX17048X+T10 part is unused and in its original packaging.
Return procedure for MAX17048X+T10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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