US211B Datasheet | Unisonic Technologies

DESCRIPTION The UTC US211/A/B/C series are 80mΩ high-side power switches. There’s internal single low voltage N-Channel MOSFET which makes it an ideal for all USB applications. This MOSFET should be driven by a charge pump circuitry inside. Its switch on resistance is as low as 80mΩ which we know specially meets the drop voltage for USB applications. The flag pin can output an open-drain fault flag to next controller. There’re lots internal special ways for protecting the chip’s operation. When in hot-plug events, there’s large current which can create the upstream voltage droop to match the USB’s voltage droop requirements and soft-start for isolating the power source. As soon as the die temperature is higher than 130℃, the internal shutdown circuit will work. Only when there’s a normal input voltage in the VIN pin, the UVLO (under-voltage lockout, 1.3V/2.5V typ.) can make sure the chip is till in the off state. Because of the requirement of USB power the fault current should be ensured less than 0.6A/1.1A (UTC US211/A, single port) and 1.3A /1.5A (UTC US211B/C, dual ports). - FEATURES - 80mΩ(Typ) N-Channel MOSFET - Supply Current: - Switch On : 25μA(Typ) - Switch Off : 1μA (Typ) - Load Current 500m A for US211 and 1.0A for US211A/B/C - Input Voltage from 2V ~ 5.5V - In Off-State: Output Voltage can be Higher than Input - ORDERING INFORMATION Ordering Number Lead Free Halogen Free US211XXL-AF5-R US211XXG-AF5-R Package SOT-25 Packing Tape Reel .unisonic..tw Copyright © 2014 Unisonic Technologies Co., Ltd 1 of 8 QW-R502-A67.a Free Datasheet http://.. US211/A/B/C - MARKING 5 Current Code: 1: 0.6A, A: 1.1A, B: 1.3A, C: 1.5A U1 1 2 3 4 Preliminary CMOS IC G: Halogen Free L : Lead Free Logic Level Enable Pin - PIN CONFIGURATION VOUT 5 VIN 4 1 CTL 2 GND 3 FLG - PIN DESCRIPTION PIN NAME CTL GND PIN NO 1 2 3 4 5 DESCRIPTION Enable Input pin, H: High active, L: Low active Ground Open-drain fault flag output Power input voltage Output voltage VIN...