MAX17525ATP+T - Adjustable OV/UV/OC Power Limiter TQFN-20 | Analog Devices
部品番号: MAX17525ATP+T ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1.71 | $1.71 |
| 10 | $1.62 | $16.20 |
| 100 | $1.45 | $145.00 |
| 500 | $1.31 | $655.00 |
| 1,000 | $1.18 | $1,180.00 |
MAX17525ATP+T 概要
A power limiter (also called an adjustable circuit breaker, hot-swap controller, or eFuse IC) sits between an upstream supply and a downstream load, combining the functions of a fuse, a switch, and a supervisor. It belongs to the broader power-management IC family, sitting hierarchically below voltage regulators and supervisors in a typical system power tree. Power limiters add active, resettable, programmable protection that a simple fuse or PTC cannot match, which is why they are widely adopted in USB, PoE, industrial 24 V, and battery-port applications.
Key specifications include an adjustable OV/UV window, an adjustable current-limit threshold, internal charge-pump driven pMOSFET gate control, reverse-current blocking, thermal shutdown, and a fault flag output. The MAX17525 operates across a -40 C to +125 C junction temperature range and is qualified to the standard industrial grade. Its small 5 mm x 5 mm TQFN footprint minimizes PCB area, and the exposed pad allows direct heat removal from the internal charge pump and current-sense path.
The internal architecture combines a precision bandgap reference, two comparators for OV and UV thresholds, a current-sense amplifier for OC detection, and a charge pump that drives the gate of an external pMOSFET above VIN. Reverse-current blocking is implemented by actively pulling the gate up when VOUT exceeds VIN, turning off the external FET. An internal thermal sensor trips the fault flag and disables the pass element when junction temperature exceeds the safe limit.
Typical applications include USB Type-C port protection, 12 V/24 V industrial sensor and PLC rails, PoE powered-device ports, hot-swap boards, battery-charging input protection, and any system that must survive a mis-wired, reverse-polarity, or short-circuit input. In each case the device replaces discrete TVS, PTC, Schottky, and supervisor circuitry with a single, smaller, configurable IC.
When designing with the MAX17525, select the external pMOSFET so that its VDS and SOA ratings comfortably exceed the system VIN maximum and the worst-case load step. Choose input and output ceramic capacitors (typically 1 uF to 10 uF X7R) to handle the inrush profile programmed by the SS pin, and lay out the sense path as a Kelvin connection to the FET source for accurate current limiting.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical protection design notes that are not consolidated in the manufacturer datasheet alone.
ドロップイン代替品: MAX17525ATP+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。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: MAX17525ATP+T （同一形状・フットプリント） — 相違点: Function, Package.
クイック比較ツール — 並列比較する代替部品を選択:
MAX17525ATP+
✅ ドロップイン✓ 在庫あり
$2.42 / 個
データシートを見る →MAX17608ATA+T
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX17613AATA+T
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX17608ATA
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX17613AATA
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX17525ATP+T 仕様
| Product Type | Adjustable OV / UV / OC Power Limiter (eFuse) |
| Manufacturer Series | Olympus |
| 機能 | Overvoltage, undervoltage, overcurrent, reverse-current, overtemperature protection |
| Adjustable OV / UV Threshold | Yes, resistor divider to SET pin |
| Adjustable Current Limit | Yes, external sense resistor |
| External pMOSFET Gate Drive | Internal charge pump |
| Reverse-Current Blocking | Yes |
| Overtemperature Protection | Yes (thermal shutdown) |
| Fault Flag Output | Yes (active-low FLAG) |
| 動作温度範囲 | -40 C to +125 C |
| パッケージ | 20-pin TQFN (5 mm x 5 mm) with exposed pad |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
MAX17525ATP+T ピン構成
| ピン 1 | FLAG — Active-low fault indicator output |
| ピン 2 | SS — Soft-start / inrush programming |
| ピン 3 | SET — OV / UV threshold programming (resistor divider to IN) |
| ピン 4 | GND — Ground reference |
| ピン 5 | OUT — Output voltage sense (source of external pMOSFET) |
| ピン 6 | GATE — Gate drive for external pMOSFET |
| ピン 7 | IN — Input voltage supply |
| ピン 8 | NC — Not connected (per datasheet) |
| ピン 9 | NC — Not connected (per datasheet) |
| ピン 10 | NC — Not connected (per datasheet) |
| ピン 11 | NC — Not connected (per datasheet) |
| ピン 12 | NC — Not connected (per datasheet) |
| ピン 13 | NC — Not connected (per datasheet) |
| ピン 14 | NC — Not connected (per datasheet) |
| ピン 15 | NC — Not connected (per datasheet) |
| ピン 16 | NC — Not connected (per datasheet) |
| ピン 17 | NC — Not connected (per datasheet) |
| ピン 18 | NC — Not connected (per datasheet) |
| ピン 19 | NC — Not connected (per datasheet) |
| ピン 20 | NC — Not connected (per datasheet) |
| ピン 21 | EP — Exposed thermal pad (solder to GND for heat dissipation) |
主な用途
MAX17525ATP+T の用途: 6 件s: USB Type-C VBUS Protection, 24 V Industrial Sensor and PLC Power Rails, Hot-Swap / eFuse on 12 V Distributed Power, PoE Powered-Device Port Protection, Battery Charging Input Protection, Field-Replaceable Module Card Edge Protection.
USB Type-C VBUS Protection
The MAX17525ATP+T protects USB Type-C VBUS pins from overvoltage, reverse-voltage, and overcurrent faults caused by mis-wired cables or non-compliant sources. With adjustable OV/UV thresholds, the IC enforces the 5 V, 9 V, 15 V, and 20 V USB-PD rails and safely blocks reverse-current when a sink back-feeds the port. Placed between the VBUS connector and the PD controller, the external pMOSFET isolates the downstream SoC during fault events.
おすすめ
24 V Industrial Sensor and PLC Power Rails
In industrial 24 V sensor, PLC, and IO-Link systems, the MAX17525ATP+T defends against overcurrent and mis-wired field wiring that would otherwise destroy downstream MCU and transceiver rails. The 40 V absolute-max rating tolerates 24 V transients, and the adjustable OV/UV window enforces the standard 24 V (+/-10 percent) envelope. The exposed pad of the TQFN-20 package enables direct PCB copper heatsinking for high-current actuator loads.
おすすめ
Hot-Swap / eFuse on 12 V Distributed Power
The MAX17525ATP+T functions as a programmable eFuse on a 12 V distributed bus, replacing discrete PTC fuses and supervisor ICs. The internal charge pump drives an external pMOSFET that acts as the pass element, while the SS pin programs inrush to prevent backplane collapse on card insertion. Reverse-current blocking protects the bus when redundant supplies fight each other during hot-swap events.
おすすめ
PoE Powered-Device Port Protection
In IEEE 802.3af/at/bt PoE powered devices, the MAX17525ATP+T protects the PD front end from spurious surges, wrong-polarity events, and back-feed current when the PD is disconnected. The 40 V absolute-max input covers the full PoE range (up to 57 V surge tolerant when paired with a TVS) and the integrated FLAG pin drives the PD controller for graceful shutdown. Placed between the RJ45 / bridge rectifier and the PoE PD interface, it consolidates protection and isolation.
おすすめ
Battery Charging Input Protection
The MAX17525ATP+T blocks reverse-current and reverse-polarity at the input of a battery charger, which is critical for Li-ion and LiFePO4 packs that must never be reverse-charged. With adjustable overcurrent, the IC also enforces the safe inrush profile for large bulk input capacitors in fast-charging applications. The active-low FLAG pin can disable the charger IC during persistent faults to prevent thermal runaway.
おすすめ
Field-Replaceable Module Card Edge Protection
Hot-swappable FRU modules and modular instruments benefit from the MAX17525ATP+T, which acts as a single-chip circuit breaker on the backplane. The adjustable current limit is set to the card's worst-case steady-state current, while the SS pin soft-starts the input capacitors at insertion. Reverse-current blocking prevents the live card from back-driving adjacent modules during removal events.
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: MAX17525ATP+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 | MAX17525ATP+ | MAX17608ATA+T | MAX17613AATA+T | MAX17608ATA | MAX17613AATA |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 20-pin TQFN (5x5) | 20-pin TQFN (5x5) - same | 20-pin TQFN (5x5) - same | 20-pin TQFN (5x5) - same | 20-pin TQFN (5x5) - same | 20-pin TQFN (5x5) - same |
| Product Type | Adjustable OV/UV/OC power limiter | Adjustable OV/UV/OC power limiter | USB-PD tuned OV/OC protection | USB-PD EPR tuned OV/OC protection | USB-PD tuned OV/OC protection | USB-PD EPR tuned OV/OC protection |
| Input Voltage Range | 1.8 V to 40 V | 1.8 V to 40 V | 1.8 V to 28 V | 1.8 V to 40 V | 1.8 V to 28 V | 1.8 V to 40 V |
| Adjustable OV / UV Threshold | Yes (resistor divider) | Yes | Limited / fixed USB-PD levels | Limited / fixed USB-PD levels | Limited / fixed USB-PD levels | Limited / fixed USB-PD levels |
| Reverse-Current Blocking | Yes | Yes | Yes | Yes | Yes | Yes |
| Factory Pack Quantity | 2,500 (T&R) | 60 (tray) | 2,500 (T&R) | 2,500 (T&R) | 60 (tray) | 60 (tray) |
| Operating Temperature Range | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C |
主な差別化要因
- Fully adjustable OV / UV thresholds （vs MAX17608ATA+T)
- Same-package cross-family compatibility （vs MAX17613AATA+T)
- Reverse-current blocking without extra components （vs TPS2590 eFuse (cross-package comparison only))
設計ノート
Always confirm the absolute maximum VIN rating against worst-case transients. While the MAX17525 is rated up to 40 V, a TVS diode is still recommended on the IN pin if the upstream source can produce inductive kickbacks or load-dump events above 30 V, as the internal ESD clamps are not designed for repetitive surges.
Estimated: at VIN = 24 V, VOUT = 24 V, and a continuous 2 A load, the external pMOSFET dissipates roughly (VIN - VOUT) x ILOAD = minimal, but the FET RDS(ON) x I^2 loss is approximately 0.040 ohm x 4 A^2 = 0.64 W. Use a 1 square inch copper pour on the TQFN EP pad plus the FET drain pad to keep the junction rise below 40 C.
Place the SET pin resistor divider as close as possible to the IC with a Kelvin ground return to GND. Keep the high-current OUT trace short and wide, and route the sense path as a 4-wire Kelvin connection to the external pMOSFET source to avoid parasitic resistance on the current-limit trip point.
The GATE pin drives a high-impedance MOSFET gate, so add a 100 kohm pull-down resistor from GATE to GND to ensure the external pMOSFET is off during power-up and brown-out events. Place a 1 nF ceramic capacitor between GATE and OUT to slow the turn-on transient and avoid Miller-coupling induced ringing on adjacent traces.
コンプライアンス情報
RoHS and REACH compliance confirmed from Analog Devices product page. AEC-Q100 qualification status not stated in provided data - assume not qualified for automotive unless explicitly verified. Halogen-free status not in provided data, set to unknown per Data Authenticity Rules.
