MAX20313EWC+T - 6A Adjustable Current-Limit Switch | Analog Devices
MPN: MAX20313EWC+T ✓ Hoạt độngMAX20313EWC+T Tóm tắt
A current-limit switch, also known as an electronic fuse (e-fuse) or hot-swap controller, is a power-distribution switch that protects downstream circuitry from overcurrent, short-circuit, and thermal faults. It sits between an upstream DC rail and the load, integrating an N-channel MOSFET, current-sense amplifier, and control logic that interrupts current flow when the programmed threshold is exceeded. This hierarchical role - load switch -> e-fuse -> power-management IC -> semiconductor - makes the device essential in USB, HDMI, and battery-powered systems where host-side protection is mandatory.
Key features include reverse-current blocking to prevent back-feed into the source, thermal shutdown protection against sustained overloads, and a fault flag (FLAG) output for host diagnostics. The active-high ON input enables low-Iq standby when disabled, preserving battery life in portable designs. The MAX20313 variant offers continuous current-limit behaviour during overcurrent events, automatically recovering once the fault is cleared.
Internally, the MAX20313EWC+T combines a low-RDS(on) N-channel pass FET with an accurate sense amplifier and one-shot timer that blanks true load steps and prevents nuisance tripping. The 10 mΩ on-resistance keeps full-load dissipation within tens of milliwatts at moderate VIN, which is critical for thermally-constrained wearable and smartphone designs where the WLP cannot rely on a copper heatsink.
Typical applications include USB Type-C VBUS current limiting, smartphone and tablet charging port protection, HDMI/DisplayPort hot-plug switches, and any 5 V rail powering external accessories. Designers also use the family in multi-rail point-of-load distribution and OVP/OCM battery-pack firmware paths.
When using this device, derate the WLP package above +70 °C ambient using the published derating curve and place the decoupling capacitor within 1 mm of the IN bump. Choose the ILIM resistor value with a 1 % tolerance to maintain accuracy across the programmed current-limit range. This page synthesises distributor pricing, drop-in alternatives, and PCB layout guidance not found in the bare Maxim datasheet.
Bộ thay thế dễ dàng lắp đặt cho MAX20313EWC+T — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MAX20313EWC+T (cùng hình factor và footprint) — khác nhau ở Function, Package, Mounting Type, Thermal Shutdown, FLAG Output.
MAX20314EWC+T
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX20315EWC+T
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX20316EWC+T
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX20313EWC
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →MAX20313EWE+T
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MAX20313EWC+T Tỷ lệ tối đa & tính chất điện
| Chức năng | Adjustable current-limit load switch (e-fuse) |
| Phạm vi điện áp đầu vào | 2.5 V to 5.5 V |
| Continuous Load Current | Up to 6 A |
| Adjustable Current Limit Range | 500 mA to 6 A |
| On-Resistance (typ) | 10 mΩ |
| Quiescent Supply Current | 250 µA (operating) |
| Fault Response (MAX20313) | Continuous current-limit (auto-retry) |
| Reverse-Current Blocking | Yes |
| Tắt nhiệt | Yes |
| ON Control Input | Active-high |
| FLAG Output | Yes (open-drain fault indicator) |
| Khoảng nhiệt độ hoạt động | -40 °C to +85 °C |
| Hộp | 12-bump WLP, 1.65 mm x 1.45 mm |
| Kiểu lắp đặt | Surface Mount (WLP) |
| Trạng thái RoHS | Compliant |
Cấu hình chân MAX20313EWC+T
| Chân A1 | GND — Ground |
| Chân A2 | IN — Power input (+2.5 V to +5.5 V) |
| Chân A3 | IN — Power input (+2.5 V to +5.5 V) |
| Chân B1 | GND — Ground |
| Chân B2 | OUT — Switch output to load |
| Chân B3 | IN — Power input (+2.5 V to +5.5 V) |
| Chân C1 | FLAG — Open-drain fault indicator |
| Chân C2 | OUT — Switch output to load |
| Chân C3 | OUT — Switch output to load |
| Chân D1 | ON — Active-high enable input |
| Chân D2 | ILIM — Current-limit programming resistor |
| Chân D3 | OUT — Switch output to load |
Ứng dụng tiêu biểu
MAX20313EWC+T phù hợp cho 6 Áp dụngs: USB Type-C VBUS Current Limiting, Smartphone Charging Port Protection, HDMI / DisplayPort Hot-Plug Switch, Multi-Rail Point-of-Load Distribution, Wearable Device Battery Protection, Industrial Sensor / Actuator Bus Switch.
USB Type-C VBUS Current Limiting
The MAX20313EWC+T is a natural fit for USB Type-C VBUS switching because its 6 A ceiling covers USB-PD 5 V @ 3 A and legacy 5 V @ 0.9 A contracts from a single part. The 10 mΩ RON keeps the worst-case dropout at 60 mV at full load, preserving USB voltage tolerance at the connector. Reverse-current blocking prevents back-feed through the cable when the system is sourcing current from both ends, a real failure mode in dual-role-port designs. With thermal shutdown engaged above the WLP junction limit and a FLAG output tied to the host PMIC, designers can poll the part for sustained overloads and gracefully derate or announce degraded power.
Được đề xuất
Smartphone Charging Port Protection
Smartphone and tablet charging paths route VBUS through a current-limit switch to prevent the PMIC from absorbing dangerous fault currents when the cable or connector shorts. The MAX20313EWC+T's 2.5 V to 5.5 V input range matches the expected VBUS excursion during USB-PD negotiation, while the 250 µA quiescent current keeps standby drain minimal. The 12-bump 1.65x1.45 mm WLP fits inside the tight B-to-B (board-to-board) footprint behind the USB-C receptacle, eliminating the need for external MOSFETs. Continuous current-limit behaviour (vs latch-off) lets the device self-recover from a momentary cable event without user-visible disconnect.
Được đề xuất
HDMI / DisplayPort Hot-Plug Switch
HDMI and DisplayPort sources must deliver 5 V on the hot-plug pin while tolerating shorts to ground caused by user plugging in a damaged cable. The MAX20313EWC+T provides that 5 V rail with the bonus of reverse-current blocking, preventing a misbehaving sink from back-driving the source connector. Its 10 mΩ RON avoids the 50 mA drop-budget required for proper hot-plug detection. A FLAG interrupt lets the graphics controller qualify cable events, log failures, and light an OSD message rather than resetting the link on each nuisance fault.
Được đề xuất
Multi-Rail Point-of-Load Distribution
In multi-rail SoM and SBC designs, a single +5 V intermediate bus feeds several downstream rails via individual load switches; the MAX20313EWC+T replaces legacy P-channel MOSFETs and discrete sense-resistor designs in a 2 mm² package. Each instance sets its own ILIM, allowing downstream budget to match load (USB-C, SATA, M.2) without global re-scaling. The active-high ON simplifies GPIO control from the PMIC, while FLAG signals are OR-wired to a single interrupt input. The 6 A ceiling covers even the most power-hungry M.2 NVMe SSD during peak surge events, all without external thermal mitigation.
Được đề xuất
Wearable Device Battery Protection
Wearables such as fitness bands, smartwatches, and AR glasses share the same problem: a small internal cell must be protected against a short-circuit in the charging contact or inductive coil. The MAX20313EWC+T gives that protection with a parts-count of one IC, no inductor, and no firmware-controlled charging path. Its 250 µA quiescent current adds negligible draw during sleep, and its WLP package is small enough to place adjacent to the USB-C or pogo-pin connector. The continuous current-limit mode handles momentary shorts from foreign objects without disabling the entire device.
Được đề xuất
Industrial Sensor / Actuator Bus Switch
Industrial sensor hubs, robot end-effectors, and actuator driver boards often bus a 5 V rail to multiple off-board field devices where a miswiring short can disable an entire machine. The MAX20313EWC+T isolates each branch with 6 A of headroom and reverse-current blocking, ensuring one faulted actuator does not pull the 5 V rail down. The +85 °C top-end matches industrial enclosure ratings, and the WLP-12 footprint is small enough for the cramped backplane of a 4-axis robotic arm joint.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX20313EWC+T — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | MAX20314EWC+T | MAX20315EWC+T | MAX20316EWC+T | MAX20313EWC | MAX20313EWE+T |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 12-WLP (1.65x1.45) | 12-WLP (1.65x1.45) | 12-WLP (1.65x1.45) | 12-WLP (1.65x1.45) | 12-WLP (1.65x1.45) | 12-WLP (1.65x1.45) |
| Continuous Load Current | 6 A | 6 A | 6 A | 6 A | 6 A | 6 A |
| Input Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V |
| Adjustable Current Limit | 500 mA to 6 A | 500 mA to 6 A | 500 mA to 6 A | 500 mA to 6 A | 500 mA to 6 A | 500 mA to 6 A |
| On-Resistance (typ) | 10 mΩ | 10 mΩ | 10 mΩ | 10 mΩ | 10 mΩ | 10 mΩ |
| Fault Response | Continuous current-limit (auto-retry) | Latch-off | Continuous current-limit | Latch-off | Continuous current-limit (auto-retry) | Continuous current-limit (auto-retry) |
| Reverse-Current Blocking | Yes | Yes | Yes | Yes | Yes | Yes |
Bảo phân biệt quan trọng
- Higher continuous load current ceiling than MAX203xx latch-off siblings (vsMAX20314EWC+T)
- Smaller footprint than any WSON-6 5-V e-fuse alternative (vsTPS25200 (TI 2.7 A WSON-6))
- Integrated reverse-current blocking and FLAG interrupt (vsDiscrete P-MOSFET + current-sense resistor)
Ghi chú thiết kế
Estimated: at 6 A continuous load, VIN=5 V, VOUT=5 V, conduction loss is ~360 mW which the WLP-12 can dissipate without active cooling at +25 °C ambient. Above +70 °C ambient or above 5 A sustained, derate the device per the datasheet's thermal resistance curve (theta_JA typically 50-70 C/W for the 1.65x1.45 mm WLP on a 4-layer JEDEC test board). For sealed industrial enclosures, add a copper pour on the top layer of at least 1 cm² directly under the WLP bumps.
Place the 1 µF X5R (or better) ceramic decoupling capacitor on IN within 1 mm of the IC bump to suppress inductive ringing during switching transients. Use a separate 1 µF or larger ceramic on OUT adjacent to the bump cluster to keep the load-step response within the data-sheet SMBus spec. Route IN and OUT as wide 0.5 mm traces on the top layer; via-stitch to inner power layers with 0.2 mm thermal vias to spread heat from the WLP.
Do not omit the ILIM resistor: leaving ILIM floating may default the device into a high-current mode that violates connector and cable specifications. Choose a 1 % or better tolerance resistor to maintain trip-point accuracy below 10 % across the operating range. Ensure the ON pin is pulled high (or tied to IN) only after VIN is stable to avoid glitches at power-up, and always debounce the FLAG line for 100 µs minimum before treating it as a true fault event.
Thông tin tuân thủ
RoHS and REACH compliance per JLCPCB and DigiKey product pages (as of 2026-10-20). AEC-Q100 not required for USB / consumer applications - this part is targeted at industrial / consumer ratings only. Halogen-free per Maxim/Analog Devices declarations.
