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US2076のメーカーはUnisonic Technologiesです、この部品の機能は「DUAL USB HIGH-SIDE POWER SWITCH」です。 |
部品番号 | US2076 |
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部品説明 | DUAL USB HIGH-SIDE POWER SWITCH | ||
メーカ | Unisonic Technologies | ||
ロゴ | |||
このページの下部にプレビューとUS2076ダウンロード(pdfファイル)リンクがあります。 Total 8 pages
UNISONIC TECHNOLOGIES CO., LTD
US2076
Preliminary
DUAL USB HIGH-SIDE POWER
SWITCH
DESCRIPTION
The UTC US2076 is a dual integrated high-side power switch
particularly designed for self-powered and bus-powered Universal Serial
Bus (USB) applications.
The UTC US2076 meets the requirements of the USB. The low
on-resistance of the switch satisfies USB voltage drop requirements.
Fault current is limited to typically 750mA, well below the UL 25VA
safety requirement. Flag outputs are available to indicate fault conditions
to the local USB controller. In addition, soft start can eliminate the
momentary voltage drop which is generated on the upstream port that
may occur when the switch is enabled in bus-powered applications.
This device has independent functions enable and flag, and an enable
input is compatible with both 3.3V and 5V logic.
The UTC US2076 includes protection circuits. Thermal shutdown
circuit is designed to protect the device from being damaged when
high-current loads exist. UVLO (Under-voltage lockout) is used to keep
the device off unless there is a valid input voltage present.
The UTC US2076 is use in applications, such as USB host and
self-powered hubs, bus-powered hubs, hot plug-in power supplies, and
battery-charger circuits.
FEATURES
* Continuous Load Current: 500mA (MIN.) per Channel
* Off-State Supply Current: 1µA (TYP.)
* Output can be Forced Higher than Input (Off-State)
* Current Limit up to 1.25A (MAX.)
* Input Supply Voltage: 3.0V ~ 5.5V
* On-State Supply Current: 110µA (TYP.)
* Thermal Shutdown Protection Circuit
* UVLO (Undervoltage Lockout): 2.4V (TYP.)
* Open-Drain Fault Flag
* 1ms Turn-On (Soft-Start) and Fast Turn-Off
* Compliant to USB Specifications
* Available with Active-Low / High Enable
ORDERING INFORMATION
Ordering Number
US2076XG-S08-R
Package
SOP-8
Packing
Tape Reel
CMOS IC
SOP-8
www.unisonic.com.tw
Copyright © 2010 Unisonic Technologies Co., Ltd
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1 Page US2076
BLOCK DIAGRAM
Preliminary
CMOS IC
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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3Pages US2076
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 US2076 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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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ページ | 合計 : 8 ページ | ||
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PDF ダウンロード | [ US2076 データシート.PDF ] |
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