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参数资料
| 型号： | SP2525A-2EN-L/TR |
| 厂商： | Exar Corporation |
| 文件页数： | 8/10页 |
| 文件大小： | 0K |
| 描述： | IC USB PWR SW HIGH-SIDE 8NSOIC |
| 标准包装： | 2,500 |
| 系列： | * |
| 类型： | 高端开关 |
| 输入类型： | * |
| 输出数： | 1 |
| 导通状态电阻： | 70 毫欧 |
| 电流 - 输出 / 通道： | 500mA |
| 电流 - 峰值输出： | 1A |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -45°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 带卷 (TR) |
S P 2 5 2 5 A
S i n g l e C h a n n e l U S B P o w e r D i s t r i b u t i o n S w i t c h
APPLICATION INFORMATION
E RROR F LAG
The Error Flag is an open-drained output of an
N-channel MOSFET, the FLG output is pulled
low to signal the following fault conditions:
input undervoltage, output current limit, and
thermal shutdown.
C URRENT L IMIT
The current limit threshold is preset internally.
It protects the output MOSFET switches from
damage resulting from undesirable short
circuit conditions or excess inrush current,
which is often encountered during hot plug-in.
The low limit of the current limit threshold of
the SP2525A allows a minimum current of
0.5A through the MOSFET switches. A current
limit condition will signal the Error Flag.
T HERMAL S HUTDOWN
When the temperature of the SP2525A
exceeds 135oC for any reasons, the thermal
shutdown function turns off the MOSFET
switch and signals the Error Flag. A hysteresis
of 10oC prevents the MOSFETs from turning
back on until the chip temperature drops
below 125oC.
S UPPLY F ILTERING
A 0.1 μ F to 1 μ F bypass capacitor from IN to
GND, located near the device, is strongly
recommended to control supply transients.
Without a bypass capacitor, an output short
may cause ringing on the input (from supply
lead inductance) which can damage internal
control circuitry.
T RANSIENT R EQUIREMENTS
USB supports dynamic attachment (hot
plugin) of peripherals. A current surge is
caused by the input capacitance of a
downstream device. Ferrite beads are
recommended in series with all power and
ground connector pins. Ferrite beads reduce
EMI and limit the inrush current during hot-
attachment by filtering high-frequency signals.
S HORT C IRCUIT T RANSIENT
Bulk capacitance provides the short-term
transient current needed during a hot-
attachment event. A 33 μ F/16V tantalum or a
100 μ F/ 10V electrolytic capacitor mounted
close to the downstream connector at each
port should provide sufficient transient drop
protection.
P RINTED C IRCUIT L AYOUT
The Power circuitry of USB printed circuit
boards requires a customized layout to
maximize thermal dissipation and to minimize
voltage drop and EMI.
I NPUT AND O UTPUT
The independent solid state switch connects
the IN pin to the OUT pin when enabled by a
logic signal at EN. The IN pin is the power
supply connection to the internal circuitry and
the drain of the output MOSFET. The OUT pin
is the source for the MOSFET. Typically, the
current in USB application will flow through
the switch from IN to OUT towards the load. If
VOUT is greater than VIN when a switch is
enabled, the current will flow from OUT to the
IN pin because the MOSFET channels are
bidirectional when switched on. The output
source is allowed to be externally forced to a
higher voltage than its input without causing
unwanted current flow when the output is
disabled.
TEST CIRCUIT
? 2011 Exar Corporation
8/10
Rev. 2.1.0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SP2525XS23RG | 制造商:SYNC-POWER 制造商全称:SYNC-POWER 功能描述:Low ESR Cap. & Low Power High-speed CMOS LDO |
| SP2525XS35RG | 制造商:SYNC-POWER 制造商全称:SYNC-POWER 功能描述:Low ESR Cap. & Low Power High-speed CMOS LDO |
| SP2526 | 制造商:SYNC-POWER 制造商全称:SYNC-POWER 功能描述:Low ESR Cap. Compatible Positive Voltage Regulators |
| SP2526-1 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP2526-1EN | 制造商:Exar Corporation 功能描述:3.0V TO +5.5V USB POWER CONTROL SWITCH (ACTIVE HIGH) |
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