MAX20313EWC - 6A Adjustable Current-Limit Switch | 12-WLP | ADI
料号： MAX20313EWC ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.61 | $1.61 |
| 10 | $1.45 | $14.50 |
| 100 | $1.25 | $125.00 |
| 500 | $1.05 | $525.00 |
| 1,000 | $0.92 | $920.00 |
MAX20313EWC 概述
An adjustable current-limit switch is a power-management IC that sits between a source rail and a downstream load, regulating and capping the load current during turn-on surges, hot-plug events, or downstream faults. The MAX20313 belongs to the current-limit switch family within the broader power-management IC hierarchy (current-limit switch -> load switch -> power-management IC -> semiconductor), making it ideal for protecting USB ports, SD card interfaces, and downstream regulators from inrush and short-circuit damage.
Key features include a precise adjustable current-limit set via an external resistor, 10 mOhm (typ) on-resistance that minimizes conduction loss at high load currents, internal reverse-current blocking to prevent back-feeding when an external source is present, and thermal shutdown that disables the switch when the die overheats. The MAX20313 uses continuous current-limit mode (autoretry) during overcurrent events, automatically recovering once the fault is removed, whereas the latchoff parts (MAX20314/MAX20316) require logic reset.
Typical applications include USB Type-C VBUS current limiting, SDXC card hot-swap protection, data modem card load switches, portable media player power rails, and RF power amplifier power management in cell phones. The 1.65 x 1.45 mm WLP footprint is designed for handheld devices where every square millimeter of PCB counts and high thermal dissipation is achievable through a modest copper pour on the top layer.
When designing with the MAX20313, consider the WLP handling and reflow profile (the 12-bump array requires precise pick-and-place alignment), and verify the SET resistor value precisely against the desired ILIM using the RILIM table in the datasheet. Reverse current blocking makes the part tolerant of brown-out events but does not replace a true ideal-diode controller for OR-ing applications.
直接替换替代料： MAX20313EWC ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MAX20313EWC （相同外形与封装尺寸） ——差异在于 Function, Mounting Type, On-Resistance (typ), Package.
快速对比工具——选择替代料号进行并排对比：
MAX20315EWC+T
✅ 直接替换📋 参考替代料（不在目录中）
MAX20314EWC+T
✅ 直接替换📋 参考替代料（不在目录中）
MAX20316EWC+T
✅ 直接替换📋 参考替代料（不在目录中）
MAX20313EWC+T
✅ 直接替换✓ 有现货
$2.46 / 个
查看数据手册 →TPS25200DRCR
✅ 直接替换📋 参考替代料（不在目录中）
MAX20313EWC 最大额定值与电气特性
| 功能 | Adjustable current-limit load switch |
| Adjustable Current Limit Range | 500 mA to 6 A |
| 输入电压范围 | 2.5 V to 5.5 V |
| On-Resistance (typ) | 10 mOhm |
| Continuous Current-Limit Mode | Yes (MAX20313: autoretry) |
| Latchoff Mode | No (see MAX20314/MAX20316) |
| Reverse Current Blocking | Yes (internal) |
| 热关断 | Yes |
| 封装 | 12-WLP (1.65 x 1.45 mm) |
| 工作温度 | -40C to +85C |
| 安装类型 | Surface Mount |
| Recommended for New Designs | Yes |
| RoHS 状态 | Compliant |
| Series | MAX20313 |
| Manufacturer | Analog Devices / Maxim Integrated |
MAX20313EWC 引脚配置
| 引脚 A1 | IN — Input voltage (2.5 V to 5.5 V) |
| 引脚 A2 | OUT — Switched output to load |
| 引脚 A3 | GND — Ground reference |
| 引脚 B1 | EN — Active-high enable input |
| 引脚 B2 | SET — Current-limit set resistor |
| 引脚 B3 | GND — Ground reference |
| 引脚 C1 | FLAG — Open-drain fault indicator |
| 引脚 C2 | IN — Input voltage (parallel A1) |
| 引脚 C3 | OUT — Switched output (parallel A2) |
| 引脚 D1 | GND — Ground reference |
| 引脚 D2 | NC — Not connected (per datasheet) |
| 引脚 D3 | GND — Ground reference |
典型应用
MAX20313EWC 适用于 6 应用s: USB Type-C VBUS Load Switch, SD Card Hot-Swap Protection, Data Modem Card Power Rail, Portable Media Player Power Distribution, RF Power Amplifier in Cell Phones, Industrial Sensor Power Switch.
USB Type-C VBUS Load Switch
The MAX20313EWC is widely used as a Type-C VBUS current-limit switch. Its 500 mA to 6 A adjustable current limit covers all USB Type-C current advertisements (500 mA USB 2.0 default, 1.5 A/3 A Type-C, up to 5 V/3 A power delivery); the internal 10 mOhm Ron adds minimal conduction loss so VBUS efficiency remains high. Place the IC between the Type-C connector's CC-controlled P-FET input path and the downstream 5 V rail, using a 100 kOhm BME resistor on SET to program 1.5 A. Compared to a discrete hot-swap N-FET + sense amp + analog controller, the MAX20313 saves roughly 60-70 percent PCB area and ~30 percent BOM cost.
推荐
SD Card Hot-Swap Protection
SDXC cards commonly present large bulk capacitance that exceeds USB inrush limits (220 uF minimum). The MAX20313EWC's adjustable current limit, set to 800 mA via SET resistor, caps the inrush while allowing steady-state SD read/write currents up to ~500 mA. Reverse-current blocking prevents a back-powered SD card from sourcing current into the host USB rail during unplug, and thermal shutdown protects against pin-short events. Routinely deployed in phone and tablet designs, this part saves PCB area versus discrete hot-swap controllers.
推荐
Data Modem Card Power Rail
WWAN/LTE data modems in mobile platforms require sequenced, fault-tolerant power delivery. The MAX20313EWC protects the 3.8 V modem power rail (programmed via SET to 2 A) against short-circuit and overcurrent events, with thermal shutdown disabling the switch when the die overheats. Compared to a P-FET-only solution the MAX20313EWC adds fault telemetry by monitoring the FLAG output, allowing the host SoC to log fault events. The 12-WLP 1.65 x 1.45 mm footprint suits the modem daughtercard layout.
推荐
Portable Media Player Power Distribution
Portable media players (PMPs) and handheld entertainment devices often run on a single 3.7 V Li-ion cell with boost to 5 V, then buck to the audio and display rails. The MAX20313EWC protects each downstream rail (3 A set limit for audio amp, 1 A set limit for display) from shorts during charging-cable events. Reverse-blocking prevents the charging IC's 5 V rail from back-driving into the battery when no cable is present. The WLP footprint permits mounting directly under BGA SoC keep-out zones.
推荐
RF Power Amplifier in Cell Phones
RF PAs in LTE/5G handsets draw 2-3 A peak currents in short bursts, often with substantial bulk decoupling on the PA supply. The MAX20313EWC, set to 3.5 A via SET, isolates the PA supply from the main 5 V rail, allowing the PA to slew without tripping the upstream USB or charger current limit. Reverse blocking prevents the PA from back-feeding when the charger is removed, which would otherwise cause unwanted battery discharge. The 10 mOhm Ron ensures less than 100 mV drop at peak PA current, preserving PA efficiency.
推荐
Industrial Sensor Power Switch
In industrial 24 V-to-5 V sensor modules, the MAX20313EWC can be repurposed as a 5 V/6 A load switch by operating it at the regulator output and using SET to clamp downstream fault currents. Reverse blocking prevents back-feeding through field-wiring faults into a multi-sensor bus, and thermal shutdown detects field-wire shorts before the upstream DC-DC converter is damaged. Although the IC's absolute maximum is 6 V, the 5 V regulator output is well within its SOA.
推荐
推荐产品汇总
工程参考数据： MAX20313EWC ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MAX20315EWC+T | MAX20314EWC+T | MAX20316EWC+T | TPS25200DRCR |
|---|---|---|---|---|---|
| Package | 12-WLP (1.65 x 1.45 mm) | 12-WLP (1.65 x 1.45 mm) - same | 12-WLP (1.65 x 1.45 mm) - same | 12-WLP (1.65 x 1.45 mm) - same | VSON-10 (DRC) |
| Brand | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Texas Instruments |
| Adjustable Current Limit | 500 mA to 6 A | 500 mA to 6 A (higher continuous) | 500 mA to 6 A (latchoff) | 500 mA to 6 A (latchoff + high current) | 1.5 A to 4 A |
| On-Resistance (typ) | 10 mOhm | 10 mOhm | 10 mOhm | 10 mOhm | 30 mOhm |
| 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 6.5 V |
| Fault Mode | Continuous (autoretry) | Continuous (autoretry) | Latchoff | Latchoff | Latchoff (selectable) |
| Reverse Current Blocking | Yes (internal) | Yes (internal) | Yes (internal) | Yes (internal) | No (external Schottky required) |
| Thermal Shutdown | Yes | Yes | Yes | Yes | Yes |
关键差异点
- Widest adjustable current-limit range in WLP-12 footprint （对比 TPS25200DRCR)
- Integrated reverse-current blocking （对比 TPS25200DRCR)
- Same-package fault-policy options （对比 MAX20314EWC+T)
设计说明
Estimated: At full 6 A load with VIN = 5 V and VOUT = 5 V (worst case for Ron loss only), conduction dissipation is I-squared x R = (6 A)-squared x 10 mOhm = 360 mW. The 12-WLP die dissipates this 360 mW into the PCB; theta_JA is approximately 60 C/W on a 1 oz 4-layer board with 1 cm-squared copper pour, leading to a 22 C junction rise. Avoid mounting the WLP directly above or below other heat sources; keep the package copper keepout zone at least 5 mm clear of inductors and other dissipating devices.
Use NSMD (non-solder-mask-defined) pads with under-bump metallization for the 12 WLP bumps - SMD pads risk bridging. Match pad diameter to the package land pattern in the mechanical drawing (typically 0.25 mm dia). Use a reflow profile with peak temperature 245 C +/-5 C and soak 150-200 C for 60-90 s; exceeding 260 C peak risks Cu-UBM dissolution. Place input/output capacitors (10 uF ceramic + 0.1 uF) within 3 mm of the IN and OUT bumps to minimize parasitic inductance during short events.
Do not exceed the 5.5 V absolute maximum on IN - transients above 5.5 V will damage the IC's internal N-FET gate oxide. Do not omit the SET resistor; leaving SET floating forces ILIM to its maximum (6 A), disabling fault protection. For latchoff mode parts (MAX20314/MAX20316), cycle EN or power-IN to reset - a continuous overcurrent event will keep the latch engaged and may overheat upstream components; always check FLAG logic after a fault.
合规信息
RoHS compliant per ADI product page. Not AEC-Q100 qualified - the MAX20313 is targeted at consumer/mobile/portable applications, not automotive.
