US2076B 查看數據表（PDF） - Unisonic Technologies

零件编号

产品描述 (功能)

生产厂家

US2076B

DUAL USB HIGH-SIDE POWER SWITCH

Unisonic Technologies 

US2076B

Preliminary

CMOS IC

„ APPLICATIONS INFORMATION

Supply filtering

In order to control supply transients, a bypass capacitor is located nearly between IN to GND. 0.1µF ~ 1µF is

suitable (See Figure 1). Without a bypass capacitor, an output short may cause sufficient ringing on the input (from

supply lead inductance) to damage internal control circuitry.

Input transients must not exceed the absolute maximum supply voltage (VIN max = 6V) even for a short duration.

Enable Input

For a clearly defined input, the EN pin must be driven logic high or logic low. Floating the input may cause

unpredictable operation. EN should not be allowed to go negative with respect to GND.

Soft Start

The UTC US2076B is high impedance when off and slowly becomes a low impedance as it turns on. This

reduces inrush current and related voltage drop that results from charging a capacitive load, satisfying the USB

voltage drop requirements, for bus-powered applications as shown in Figure 2.

VBUS

USB Host

GND

Cable

USB

Controller

UTC

US2076B

1 ENA

2

FLGA

3

FLGB

4 ENB

8

OUTA

7

IN

6

GND

OUTB 5

4.7

µF

BUS Powered Hub

CBULK

Cable

Capactive

Load

Downstream USB Device

Figure 2. Soft Start (Single Channel)

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

6 of 8

QW-R502-447.a

Share Link: