The MAX1823 is a dual, current-limited switch with autoreset specifically made for USB applications. The autoreset feature latches the switch off if the output is shorted, saving system power. The switch reactivates when the short circuit is removed. Each channel is guaranteed to supply 720mA and meet USB specifications. Low quiescent supply current (50µA) and standby current (3µA) conserve battery power in portable applications.

The MAX1823 has multiple safety features to ensure that the USB port is protected. Built-in thermal-overload protection limits power dissipation and junction temperature. Accurate internal current-limiting circuitry protects the input supply against both overload and short-circuit conditions. Independent fault signals (active-low FAULTA and active-low FAULTB) notify the microprocessor (µP) when a thermal-overload, current-limit, undervoltage-lockout (UVLO), or short-circuit fault occurs. A 20ms fault-blanking feature ignores momentary faults, such as those caused when hot swapping a capacitive load, preventing false alarms to the host system. The MAX1823A/MAX1823B also block reverse current (current from OUT_ to IN_) while in shutdown.

The MAX1823 is available in a space-saving 10-pin µMAX® package. The MAX1823/MAX1823A are enabled with an active-low signal, and the MAX1823B/MAX1823H are enabled with an active-high signal. For a single version of this device, refer to the MAX1946 data sheet. For a triple version, refer to the MAX1940 data sheet.

• MAX9031 - 低成本、超小型、单/双/四路、单电源比较器
• MAX5048B - 7.6A、12ns、SOT23/TDFN封装、MOSFET驱动器
• MAX8556 - 4A、超低输入电压LDO稳压器
• MAX97000 - 带有单声道D类扬声器和H类耳机放大器的音频子系统
• MAX1497 - 3位半和4位半、单片ADC，带有LED驱动器和µC接口
• MAX521 - 四/八通道、2线串行8位DAC，满摆幅输出
• MAX14627 - SEND/END按键支持低功耗耳机检测
• MAX4031E - 低成本、144MHz、双/三路运算放大器，带有±15kV ESD保护
• MAX973 - 超低功耗、漏极开路输出、单/双电源比较器
• MAX6308 - 5引脚、多输入、可编程复位IC