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PDF US251 Data sheet ( Hoja de datos )
| Número de pieza | US251 | |
| Descripción | POWER-DISTRIBUTION SWITCHES | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de US251 (archivo pdf) en la parte inferior de esta página. Total 5 Páginas | ||
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UNISONIC TECHNOLOGIES CO., LTD
US251
Preliminary
CURRENT-LIMITED,
POWER-DISTRIBUTION
SWITCHES
CMOS IC
DESCRIPTION
The UTC US251 is a power distribution switch. It is intended for
applications such as USB where heavy capacitive loads and
short-circuits are likely to be encountered. This family offers
multiple devices with fixed current-limit thresholds for applications
between 0.5A and 2A.
The RDS(ON) of the MOSFET switch is as low as 80mΩ. OC is
open-drain output report over-current or over-temperature event
which has deglitch typical 9ms timeout period typically 9ms.
The UTC US251 incorporates protection circuits including
current limiting circuit with foldback function, thermal shutdown
circuit designed to prevent catastrophic switch failure due to
increasing power dissipation when continuous heavy loads or short
circuit occurs. Besides, a built-in charge pump is used to drive the
N-channel MOSFET that is free of parasitic body diode to eliminate
any reversed current flow across the switch when it is powered off.
The UTC US251 is applied in high-side power protection switch,
USB power management, USB host and self-powered bubs, USB
bus-powered hubs, hot plug-in power supplies, battery-charger
circuits.
FEATURES
* Single Power Switch Family
* 80-mΩ High-Side MOSFET
* Rated currents of 0.5 A, 1 A, 1.5 A, 2 A
* Accurate, Fixed, Constant Current Limit
* Deglitched Fault Reporting
* Output Discharge When Disabled
* Reverse Current Blocking
* Built-in Softstart
ORDERING INFORMATION
Ordering Number
US251G-xx-AF5-R
US251G-xx-AF5-R
(1)Packing Type
(2)Package Type
(3)Current Limit
(4)Green Package
Package
SOT-25
Packing
Tape Reel
(1) R: Tape Reel
(2) AF5: SOT-25
(3) 08: 0.8mA, 16: 1.6mA, 22: 2.2mA, 29: 2.9mA
(4) G: Halogen Free and Lead Free
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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US251
Preliminary
TYPICAL APPLICATION CIRCUIT
VIN
RFLT
10kΩ 0.1µF
IN
OUT
Fault Signal
Control Signal
OC
EN of EN
GND
CMOS IC
VOUT
150µF
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet US251.PDF ] | |
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