BL2556 is a USB output protection chip with adjustable current limit threshold for 5V applications. The device integrates over current protection, short protection, over temperature protection, under voltage lock-out protection functions, etc. It can limit output current when short event happens or heavy capacitive load is applied to the USB output, so as to protect the supply voltage source from collapsing.

• Low on resistance: 70mΩ
• Current-limit threshold adjustable by external resistor
• Current limit accuracy over full operating conditions：±15%
• Output short fast response and protection
• No parasitic substrate diode, and reverse current blocking when switch is off

• BL2556_V4.1_en.pdf

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