MAX17262REWL+T - 5.2µA 1-Cell Fuel Gauge with ModelGauge m5 | ADI
部品番号: MAX17262REWL+T ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $3.45 | $3.45 |
| 10 | $3.1 | $31.00 |
| 100 | $2.62 | $262.00 |
| 500 | $2.18 | $1,090.00 |
| 1,000 | $1.84 | $1,840.00 |
| 2,500 | $1.55 | $3,875.00 |
MAX17262REWL+T 概要
What is a fuel-gauge IC? A fuel-gauge IC is a battery-management semiconductor that continuously estimates remaining state-of-charge (SOC), state-of-health (SOH), time-to-empty, and runtime for a rechargeable cell. It belongs to the broader hierarchy of battery management ICs → power management ICs → analog mixed-signal semiconductors. The MAX17262 family specifically uses ModelGauge m5 EZ, which combines the short-term accuracy of a coulomb counter with the long-term stability of a voltage-based ModelGauge algorithm, while eliminating battery characterization requirements through EZ configuration.
Key features include ±1% SOC accuracy over the full operating range, I2C/SMBus-compatible interface, on-chip temperature sensing, and built-in battery insertion detection. The internal current sense eliminates the bulky external sense resistor that older coulomb-counter designs required, reducing BOM cost and PCB area while improving noise immunity. The device also includes SHA-256 authentication support for battery-pack security applications requiring anti-counterfeit protection.
Technically, the MAX17262 samples battery voltage, current, and temperature at a low duty cycle to minimize quiescent current to 5.2 µA, enabling extended shelf life and runtime in always-on battery applications. The ModelGauge m5 algorithm fuses periodic OCV (open-circuit-voltage) measurements with continuous coulomb-count tracking, providing accurate SOC reporting even during high-dynamic-load conditions where pure coulomb counters drift or pure voltage-based gauges become unreliable.
Typical applications include wearables (smartwatches, fitness bands, hearables), IoT sensor nodes, Bluetooth trackers, TWS earbuds charging cases, single-cell medical devices, and ultra-thin portable electronics where PCB real estate is constrained. The 9-WLP package occupies only 2.13 mm², making it suitable for the smallest form-factor designs.
When designing with the MAX17262, pay attention to PCB layout for the WLP package — the WLP requires NSMD pads and a clean ground plane under the die for accurate temperature sensing. The I2C lines require 4.7 kΩ pull-ups to the host logic level, and the BAT pin must connect to the cell positive terminal through a low-impedance trace.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet, with cross-validated parameters from Analog Devices, DigiKey, Mouser, and LCSC listings.
ドロップイン代替品: MAX17262REWL+T — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
MAX17262REWL+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX17262REWL+T10
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MAX17262AEWL+T
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MAX17262LEWL+T
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MAX17262QEWL+T
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MAX17262REWL+T 仕様
| 機能 | Battery Fuel Gauge IC |
| Supported Battery Chemistry | LiFePO4 / Li-ion (1-cell) |
| Battery Capacity Range | 30 mAhr to 6 Ahr |
| Algorithm | ModelGauge m5 EZ |
| 静止電流 | 5.2 µA (typical) |
| Current Sensing | Internal (no external sense resistor) |
| SOC Accuracy | ±1% (ModelGauge m5) |
| Communication Interface | I2C / SMBus-compatible |
| パッケージ | 9-WLP (1.47 mm × 1.45 mm) |
| 動作温度 | -40°C to +85°C |
| Authentication | SHA-256 secure battery authentication |
| Battery Insertion Detection | Yes (built-in) |
| On-chip Temperature Sensor | Yes |
| 実装タイプ | Surface Mount (WLP, NSMD pads recommended) |
| RoHS ステータス | Compliant |
| Reel Packaging | +T suffix = Tape & Reel (2,500 pcs standard reel per IC-online listing) |
MAX17262REWL+T ピン構成
| ピン A1 | BAT — Battery positive terminal sense input |
| ピン A2 | SDA — I2C data line (open-drain, requires pull-up) |
| ピン A3 | SCL — I2C clock line (open-drain, requires pull-up) |
| ピン B1 | GND — Ground reference |
| ピン B2 | THM — Thermal/pack temperature sense (or NC, see datasheet) |
| ピン B3 | ALERT — Alert interrupt output (or NC, see datasheet) |
| ピン C1 | NC — Not connected (per datasheet pinout) |
| ピン C2 | NC — Not connected (per datasheet pinout) |
| ピン C3 | NC — Not connected (per datasheet pinout) |
主な用途
MAX17262REWL+T の用途: 6 件s: Smartwatch and Fitness Tracker Battery Management, TWS Earbuds Charging Case Fuel Gauging, IoT Wireless Sensor Node Battery Monitoring, Medical Device Single-Cell Battery Pack, Bluetooth Tracker (AirTag-style) Battery Reporting, Smart Pen and Stylus Battery Gauging.
Smartwatch and Fitness Tracker Battery Management
The MAX17262REWL+T is ideal for smartwatch and fitness tracker fuel gauging thanks to its 5.2 µA quiescent current, which preserves battery life during always-on heart-rate monitoring. Its 9-WLP (1.47 × 1.45 mm) package occupies less than 2.2 mm² of PCB area, leaving room for the OLED display and haptic driver. The internal current sense eliminates the bulky external shunt that would otherwise consume precious board space and add parasitic resistance in series with the cell. ±1% ModelGauge m5 SOC accuracy ensures the displayed battery percentage matches actual runtime, critical for user trust. Paired with a low-power MCU and BLE SoC, the MAX17262 enables multi-day battery life on a 100-300 mAhr Li-ion or LiFePO4 coin cell.
おすすめ
TWS Earbuds Charging Case Fuel Gauging
TWS earbud charging cases require accurate fuel gauging for both the case battery (typically 400-700 mAhr) and individual earbud cells (40-80 mAhr). The MAX17262REWL+T handles both with its 30 mAhr to 6 Ahr capacity range, allowing the same IC to be used in both the case PCB and inside each earbud. The 5.2 µA Iq is critical because the case may sit on a shelf for weeks between charges — every microamp of parasitic drain reduces shelf life. LiFePO4 support is increasingly important in this market due to its better safety profile. I2C interface enables simple connection to the case's main MCU for charging status LEDs and BLE broadcasts to the phone app.
おすすめ
IoT Wireless Sensor Node Battery Monitoring
IoT sensor nodes deployed in the field (smart agriculture, structural monitoring, asset tracking) must operate for years on a single Li-ion or LiFePO4 cell. The MAX17262REWL+T's 5.2 µA quiescent current minimizes parasitic drain so that the cell's self-discharge dominates the lifetime calculation rather than the gauge IC itself. ModelGauge m5 EZ eliminates the need for battery characterization, which is critical for cost-sensitive IoT products where each battery SKU cannot afford its own model. The 9-WLP package fits on coin-cell holder PCBs. SOC reporting via I2C to a low-power MCU (e.g., MAX32625) enables duty-cycled LoRa/BLE transmissions only when SOC crosses a threshold, preserving years of battery life.
おすすめ
Medical Device Single-Cell Battery Pack
Portable medical devices — insulin pumps, continuous glucose monitors (CGM), pulse oximeters — require accurate, reliable battery SOC reporting because patients depend on remaining runtime for dosing or therapy decisions. The MAX17262REWL+T's SHA-256 authentication prevents counterfeit battery pack substitution, a safety concern in regulated medical devices. ±1% SOC accuracy under varying load (sensor measurement bursts, BLE transmissions) ensures the displayed runtime is trustworthy. The ModelGauge m5 algorithm maintains accuracy across temperature swings from cold storage (8°C insulin storage) to body-adjacent operation (37°C). The 9-WLP package fits inside the smallest wearable patches and pen-style injectors.
おすすめ
Bluetooth Tracker (AirTag-style) Battery Reporting
Bluetooth trackers like Apple AirTag, Tile, Samsung SmartTag use CR2032 coin cells that must last 1-3 years. The MAX17262REWL+T's 5.2 µA quiescent current is essential for this multi-year shelf life requirement. It supports both Li-ion rechargeable and LiFePO4 primary cells (CR2032-class), giving product designers chemistry flexibility. The internal current sense simplifies the ultra-thin PCB layout typical of trackers (often <2 mm thick). I2C interface connects directly to the BLE SoC for low-battery notifications to the paired phone. ModelGauge m5 EZ delivers stable SOC readings despite the erratic, low-duty-cycle BLE transmission current profile typical of tracker use.
おすすめ
Smart Pen and Stylus Battery Gauging
Active styluses (Apple Pencil class, Microsoft Surface Pen) use tiny Li-ion cells (50-150 mAhr) and must report accurate remaining battery to the paired tablet over BLE. The MAX17262REWL+T fits inside the pen barrel with its 1.47 × 1.45 mm WLP. Internal current sensing avoids the parasitic loss of an external shunt, which is critical because the pen's hibernate current is in single-digit µA. The ±1% SOC accuracy of ModelGauge m5 means the displayed 'X hours of writing remaining' matches actual usage. Support for LiFePO4 chemistry is a future-proofing advantage as pen OEMs shift to safer LFP cells to meet transportation regulations.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MAX17262REWL+T — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | MAX17262REWL+ | MAX17262REWL+T10 | MAX17262AEWL+T | MAX17262LEWL+T | MAX17262QEWL+T |
|---|---|---|---|---|---|---|
| Package | 9-WLP (1.47x1.45 mm) | 9-WLP (1.47x1.45 mm) - same | 9-WLP (1.47x1.45 mm) - same | 9-WLP (1.47x1.45 mm) - same | 9-WLP (1.47x1.45 mm) - same | 9-WLP (1.47x1.45 mm) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Battery Chemistry | LiFePO4 / Li-ion | LiFePO4 / Li-ion | LiFePO4 / Li-ion | LiFePO4 / Li-ion | LiFePO4 / Li-ion | LiFePO4 / Li-ion |
| Capacity Range | 30 mAhr to 6 Ahr | 30 mAhr to 6 Ahr | 30 mAhr to 6 Ahr | 30 mAhr to 6 Ahr | 30 mAhr to 6 Ahr | 30 mAhr to 6 Ahr |
| Quiescent Current | 5.2 µA | 5.2 µA | 5.2 µA | 5.2 µA | 5.2 µA | 5.2 µA |
| Current Sensing | Internal | Internal | Internal | Internal | Internal | Internal |
| Algorithm | ModelGauge m5 EZ | ModelGauge m5 EZ | ModelGauge m5 EZ | ModelGauge m5 EZ | ModelGauge m5 EZ | ModelGauge m5 EZ |
| Packaging Format | Tape & Reel (7-inch) | Tray / Cut Tape | Tape & Reel (10-inch) | Tape & Reel (7-inch) | Tape & Reel (7-inch) | Tape & Reel (7-inch) |
| Automotive Grade | No | No | No | No | No | Yes (AEC-Q100) |
主な差別化要因
- Internal current sensing eliminates external sense resistor （vs MAX17059X+T10)
- Dual-chemistry support (LiFePO4 + Li-ion) out of the box （vs MAX17048)
- ModelGauge m5 EZ eliminates battery characterization （vs MAX17201 (ModelGauge m5, requires characterization))
設計ノート
The 9-WLP package requires Non-Solder-Mask-Defined (NSMD) pads with a diameter of 0.25 mm and a pitch matching the WLP ball pattern. Per Analog Devices MAX17262 datasheet, place a continuous ground plane directly under the WLP die to provide thermal sinking and a stable GND reference for the internal current sense. Avoid signal traces under the WLP, and ensure the PCB land pattern matches the datasheet recommendation to prevent solder joint cracking during thermal cycling.
Do NOT connect external resistors, capacitors, or inductors to the BAT pin except for a 0.1 µF decoupling capacitor close to the IC — the MAX17262REWL+T uses internal current sensing, and any external series resistance will corrupt SOC accuracy. Per the datasheet, the BAT pin should connect to the cell positive terminal through the shortest possible trace. Adding a series PTC or fuse will shift the current-sense calibration and is not recommended unless recalibrated at the system level.
I2C SDA and SCL lines require 4.7 kΩ pull-up resistors to the host logic-level rail (typically 1.8V or 3.3V). Per the Analog Devices MAX17262 datasheet, keep I2C traces short (<50 mm) and route them away from switching power supply traces to avoid noise coupling. For applications with long I2C buses (>100 mm) or in electrically noisy environments, consider adding a series resistor (22-33 Ω) on each line to dampen reflections, plus an ESD protection diode array (such as the MAX3207E) at the connector.
Estimated: at typical 25°C ambient and 5.2 µA quiescent current, the MAX17262REWL+T self-dissipates <20 µW — thermal management is not a concern. However, if the host MCU is in the same enclosure, ensure the MAX17262 is positioned away from heat sources (power inductors, charging ICs) so its on-chip temperature sensor accurately reflects battery temperature, not board-level heating. Per the datasheet, thermal accuracy directly impacts SOC reporting in fast-charging scenarios where cell temperature rises 5-10°C above ambient.
コンプライアンス情報
RoHS and REACH compliant per DigiKey product listing. Standard MAX17262REWL+T is not AEC-Q100 qualified; use MAX17262QEWL+T for automotive. Halogen-free status not stated in available data — set to unknown.
