MAX20313-MAX20316 - 6A Adjustable Current-Limit Switch WLP-12 | Analog Devices
部品番号: MAX20313EWC+ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.55 | $25.50 |
| 100 | $2.18 | $218.00 |
| 500 | $1.92 | $960.00 |
| 1,000 | $1.71 | $1,710.00 |
MAX20313EWC+ 概要
A current-limit switch (also known as an eFuse, hot-swap controller, or power-distribution switch) is a semiconductor device that combines a MOSFET switch with analog current monitoring and fault detection on a single die. It belongs to the broader power-management IC hierarchy: current-limit switch -> load switch -> power switch -> power management IC -> semiconductor. By replacing discrete fuses, sense resistors, and supervisor circuitry, these devices reduce BOM count, board area, and improve diagnostic accuracy in USB, charging, and industrial 24 V bus applications.
Key features of the MAX20313-MAX20316 family include 500 mA to 6 A adjustable current limit, 10 mΩ typical on-resistance, reverse-current blocking, and thermal-shutdown protection. Two distinct fault responses are offered - the MAX20313 and MAX20315 operate in continuous current-limit mode (auto-retry), while the MAX20314 and MAX20316 latch off after the blanking window expires, requiring host toggling of the EN input to restart.
Internally, the device uses a high-side N-channel MOSFET driven by an internal charge pump, a bandgap-referenced current-sense amplifier that compares the drop across the FET against an external resistor-set threshold, and a state machine that controls the blanking timer and latched/auto-retry behavior. The WLP-12 package achieves a thermal resistance (θJA) suitable for 6 A operation on a properly sized PCB copper pour, and the small 1.65 mm × 1.45 mm footprint enables placement near the connector it protects.
Typical applications include USB Type-C VBUS current limiting and port-power switching, large-capacitance load charging (battery packs, super-cap banks), SATA and PCIe hot-plug protection, industrial 24 V bus protection, and any system rail requiring electronic circuit-breaker behavior with processor visibility.
When designing with these parts, place the device as close to the input connector as possible, use a low-ESR ceramic bypass on IN, and follow the manufacturer's recommended copper-pour geometry on the GND and OUT bumps for thermal dissipation. The ILIM resistor must be a 1% tolerance part to maintain current-limit accuracy.
This page synthesizes distributor pricing, same-package drop-in family variants, and practical layout guidance beyond what the manufacturer datasheet alone provides.
ドロップイン代替品: MAX20313EWC+ — 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: MAX20313EWC+ （同一形状・フットプリント） — 相違点: FLAG Output, Function, Operating Temperature Range, Package, Thermal Shutdown.
クイック比較ツール — 並列比較する代替部品を選択:
MAX20313EWC+
✅ ドロップイン✓ 在庫あり
$1.71 / 個
データシートを見る →MAX20314EWC+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX20315EWC+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX20316EWC+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX20313EWC+T
✅ ドロップイン✓ 在庫あり
$2.46 / 個
データシートを見る →MAX20313EWC+ 最大定格＆電気的特性
| 機能 | Programmable current-limit switch (high-side load switch) |
| Input Voltage Range (IN) | +2.5 V to +5.5 V |
| Adjustable Current Limit | 500 mA to 6 A |
| On-Resistance (RON) | 10 mΩ typical |
| Reverse Current Blocking | Yes |
| 熱シャットダウン | Yes (internal) |
| Fault Response - MAX20313/MAX20315 | Continuous current-limit mode (auto-retry) |
| Fault Response - MAX20314/MAX20316 | Latch-off mode |
| FLAG Output | Open-drain fault indicator |
| Blanking Time | Fixed (per datasheet) |
| Enable Input | Active-high EN |
| パッケージ | 12-bump WLP (1.65 mm × 1.45 mm) |
| 動作温度範囲 | -40°C to +85°C (extended industrial) |
| 実装タイプ | Surface Mount (WLP) |
| Compliance | RoHS compliant |
MAX20313EWC+ ピン構成
| ピン A1 | IN — Input supply (+2.5V to +5.5V) |
| ピン A2 | IN — Input supply (parallel bump for high current) |
| ピン A3 | GND — Ground |
| ピン B1 | OUT — Switch output to load |
| ピン B2 | OUT — Switch output (parallel bump) |
| ピン B3 | GND — Ground |
| ピン C1 | EN — Active-high enable input |
| ピン C2 | ILIM — Current-limit programming resistor |
| ピン C3 | FLAG — Open-drain fault indicator output |
| ピン D1 | NC — Not connected (per datasheet) |
| ピン D2 | NC — Not connected (per datasheet) |
| ピン D3 | NC — Not connected (per datasheet) |
主な用途
MAX20313EWC+ の用途: 6 件s: USB Type-C VBUS Current-Limit Switch, Hot-Plug Protection for SATA / PCIe Ports, Large Load-Capacitor Charging (Battery / Super-Cap), Industrial 24 V Bus Protection, Portable Device Charging Port Protection, Embedded System Auxiliary Rail Switching.
USB Type-C VBUS Current-Limit Switch
The MAX20313EWC+ fits USB Type-C VBUS power switching because it delivers a 500 mA to 6 A programmable current limit in a 1.65 mm × 1.45 mm WLP-12 package, placing protection immediately adjacent to the Type-C connector. Its 10 mΩ typical on-resistance minimizes voltage drop between the system 5 V rail and the device port, preserving compliance with USB PD voltage tolerances at high current. The reverse-current blocking feature prevents back-feeding when a downstream device sources current upstream, a critical safety requirement in modern USB-C designs. The fixed blanking time and open-drain FLAG output let the USB-PD controller distinguish between momentary inrush and sustained overcurrent events, while thermal shutdown protects the WLP die when a hard short persists. Compared to a discrete P-MOSFET + sense resistor + supervisor, the MAX20313 integrates all functions in a single 12-bump die, reducing BOM and board area by 50-70%.
おすすめ
Hot-Plug Protection for SATA / PCIe Ports
The MAX20313EWC+ suits SATA and PCIe hot-plug insertion because its adjustable current limit prevents the inrush of charging bulk load capacitance from collapsing the upstream rail. With 10 mΩ on-resistance and a 6 A maximum rating, the device can supply typical 3.3 V or 5 V rail loads up to several amps while limiting inrush to a programmable safe level via the ILIM resistor. The MAX20314 latchoff variant is preferred for storage applications because a sustained overcurrent almost always indicates a true fault that should not auto-retry - host intervention prevents data corruption. Reverse-current blocking also protects the upstream supply if a downstream bulk capacitor remains charged after the source is removed, which is common in PCIe cards with large bypass banks.
おすすめ
Large Load-Capacitor Charging (Battery / Super-Cap)
When charging large bulk capacitors such as super-capacitor banks or large Li-ion battery packs, the MAX20313EWC+ provides controlled inrush by limiting the current to the ILIM-programmed value rather than allowing a near-short at the moment of connection. This prevents connector arcing, upstream rail collapse, and MOSFET avalanche stress. The continuous-limit behavior of the MAX20313 keeps the current regulated rather than shutting off, which is ideal when the load itself is the destination and the system should tolerate brief overloads until the bulk cap charges up. The 10 mΩ RON means the conduction loss is roughly 0.36 W at 6 A, which the WLP-12 package handles with proper layout. Designers typically place the device within 5 mm of the load capacitor to minimize parasitic inductance that could otherwise create voltage transients.
おすすめ
Industrial 24 V Bus Protection
The MAX20313-MAX20316 family is specified for +2.5 V to +5.5 V operation, so a 24 V industrial bus requires a pre-regulator ahead of the IN pin, but the device still fits as the secondary protection stage for downstream 5 V or 3.3 V rails. Its 6 A continuous rating handles multi-port industrial sensor hubs and PLC I/O banks, while the FLAG output wires back to the PLC's digital input for fault telemetry. The latchoff mode of the MAX20314/MAX20316 versions aligns with industrial safety practices where a fault must be acknowledged by the controller rather than silently auto-retrying. The reverse-current blocking also matters in 24 V systems where motor back-EMF or inductive kickback can drive reverse current that would damage unprotected switches.
おすすめ
Portable Device Charging Port Protection
For portable devices like handheld scanners, medical wearables, and ruggedized tablets, the MAX20313EWC+ provides protection at the charging input port where the device is most exposed to faulty cables, contaminated connectors, and user-induced shorts. The 1.65 mm × 1.45 mm WLP-12 package fits into the compact PCB real estate of a portable enclosure, while the 10 mΩ on-resistance is critical for preserving battery-life efficiency during charge cycles. The MAX20313 auto-retry mode is appropriate for consumer devices where occasional cable-flap transients should self-clear without user intervention. Reverse-current blocking also prevents the battery from back-driving the charging source when the input is removed - a common failure mode with passive switches in low-cost designs.
おすすめ
Embedded System Auxiliary Rail Switching
Embedded designs that need to power-cycle auxiliary subsystems (RF modules, sensors, displays) benefit from the MAX20313EWC+ as a software-controlled load switch with built-in current limiting. The EN pin connects directly to a GPIO, allowing firmware to reset a misbehaving peripheral by toggling power. The 10 mΩ RON means the switch adds minimal voltage drop even at 1-2 A loads, and the small WLP footprint fits next to the peripheral it powers. Designers can use the MAX20315 variant when tighter ILIM accuracy is needed for analog peripherals that draw constant currents and would be disturbed by even brief ILIM oscillations. The FLAG output also doubles as a fault telemetry channel for diagnostics in fielded systems.
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: MAX20313EWC+ — 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 | MAX20313EWC+ | MAX20314EWC+ | MAX20315EWC+ | MAX20316EWC+ | MAX20313EWC+T |
|---|---|---|---|---|---|---|
| Package | 12-bump WLP (1.65x1.45) | 12-bump WLP (1.65x1.45) | 12-bump WLP (1.65x1.45) | 12-bump WLP (1.65x1.45) | 12-bump WLP (1.65x1.45) | 12-bump WLP (1.65x1.45) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Input Voltage Range | +2.5V to +5.5V | +2.5V to +5.5V | +2.5V to +5.5V | +2.5V to +5.5V | +2.5V to +5.5V | +2.5V to +5.5V |
| Current Limit Range | 500 mA to 6 A | 500 mA to 6 A | 500 mA to 6 A | 500 mA to 6 A (tighter tolerance) | 500 mA to 6 A (tighter tolerance) | 500 mA to 6 A |
| On-Resistance (typ) | 10 mΩ | 10 mΩ | 10 mΩ | 10 mΩ | 10 mΩ | 10 mΩ |
| Fault Response | Continuous-limit (auto-retry) | Continuous-limit | Latchoff | Continuous-limit (tight ILIM) | Latchoff (tight ILIM) | Continuous-limit |
| Reverse-Current Blocking | Yes | Yes | Yes | Yes | Yes | Yes |
| Thermal Shutdown | Yes | Yes | Yes | Yes | Yes | Yes |
主な差別化要因
- Smallest 6 A current-limit switch in 1.65 mm × 1.45 mm WLP （vs MAX20314EWC+)
- Continuous-limit auto-retry fault response （vs MAX20314EWC+)
- Family of four parts on single die for BOM consolidation （vs MAX20313EWC+T (tape/reel variant))
設計ノート
At 6 A continuous load and 10 mΩ RON, the WLP-12 die dissipates approximately 0.36 W of conduction loss; peak dissipation during fault conditions is higher due to I*R losses in the linear current-limit loop. The WLP package relies on PCB copper pours for heat spreading - design at least 1 oz copper on both top and bottom layers directly under the IN/OUT bumps, with thermal vias stitching the layers. Without adequate copper, the junction temperature can exceed the thermal-shutdown threshold during sustained faults, causing the protection feature to mask the actual fault behavior.
Place the MAX20313EWC+ within 5 mm of the connector it protects to minimize parasitic inductance in the protected path. Use a 1 µF low-ESR ceramic bypass capacitor on IN and a 1 µF to 10 µF output capacitor on OUT per the datasheet. The WLP-12 bumps require solder-mask-defined (SMD) pads with the specific land-pattern geometry published in the datasheet - using non-solder-mask-defined (NSMD) pads without verifying can lead to bump-coplanarity failures during reflow.
Use a 1% tolerance ILIM programming resistor - any drift in this resistor directly translates to drift in the current-limit threshold. Do not enable the device (drive EN high) before IN has reached its minimum operating voltage, or the part may enter an undetermined state. The FLAG output is open-drain and requires an external pull-up resistor (typically 10 kΩ to 100 kΩ) to a logic rail; leaving it floating will mask fault conditions. When substituting between family members (MAX20313/14/15/16), verify the fault-response bit - substituting a latchoff part where auto-retry is expected changes system behavior silently.
コンプライアンス情報
RoHS compliance stated on Analog Devices product page. The -Q suffix variants, if released, would be the AEC-Q100 qualified members; the standard EWC+ variant is industrial grade (-40C to +85C).
