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| 型号： | MAX890LESA |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/8页 |
| 文件大小： | 0K |
| 描述： | IC SW MOSFET PWR PCH HSIDE 8SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 类型： | 高端开关 |
| 输出数： | 1 |
| Rds（开）： | 130 毫欧 |
| 内部开关： | 是 |
| 电流限制： | 1.2A |
| 输入电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°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-SOIC |
| 包装： | 管件 |
1.2A, Current-Limited, High-Side
P-Channel Switch with Thermal Shutdown
Output Capacitor
Connect a 0.1μF capacitor from OUT to GND. One
function of this capacitor is to prevent inductive para-
sitics from pulling OUT negative during turn-off.
MAX890L
SET
GND
R SET
Layout and Thermal-Dissipation
Consideration
To take full advantage of the switch-response time to
output short-circuit conditions, it is very important to
keep all traces as short as possible to reduce the effect
of undesirable parasitic inductance. Place input and
output capacitors as close as possible to the device
(no more than 5mm).
Under normal operating conditions, the package can
Figure 2. Setting the Current Limit
Thermal Shutdown
The MAX890L features thermal shutdown. The switch
turns off when the junction temperature exceeds
+135°C. Once the device cools by 10°C, the switch
turns back on. If the fault short-circuit condition is not
removed, the switch cycles on and off, resulting in a
pulsed output.
Fault Indicator
The MAX890L provides a fault output ( FAULT ). This
dissipate and channel heat away. Calculate the maxi-
mum power as follows:
P = I 2 LIMIT x R ON
where R ON is the on-resistance of the switch.
When the output is short circuited, the voltage drop
across the switch equals the input supply. Hence, the
power dissipated across the switch increases, as does
the die temperature. If the fault condition is not
removed, the thermal-overload-protection circuitry turns
the switch off until the die temperature falls by 10°C. A
ground plane in contact with the device helps dissipate
open-drain output goes low when in current limit or
when the die temperature exceeds +135°C. A 100k Ω
pull-up resistor from FAULT to IN provides a logic-
additional heat.
Package Information
control signal.
Applications Information
Input Capacitor
For the latest package outline information and land patterns
(footprints), go to www.maxim-ic.com/packages . Note that a
“+”, “#”, or “-” in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but the
drawing pertains to the package regardless of RoHS status.
To limit the input voltage drop during momentary output
short-circuit conditions, connect a capacitor from IN to
GND. A 1μF ceramic capacitor is adequate for most
applications; however, higher capacitor values further
PACKAGE
TYPE
8 SO
PACKAGE
CODE
S8+5
OUTLINE
NO.
LAND
PATTERN NO.
reduce the voltage drop at the input.
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX890LESA/V+ | 功能描述:电源开关 IC - 配电 5/3.3/AdjV 200mA LDO RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MAX890LESA/V+T | 功能描述:电源开关 IC - 配电 1.2A P-Channel Swtch w/Thermal Shutdown RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MAX890LESA+ | 功能描述:电源开关 IC - 配电 1.2A Current-Limited High-Side PCh Switch RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MAX890LESA+T | 功能描述:电源开关 IC - 配电 1.2A Current-Limited High-Side PCh Switch RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
| MAX890LESA-T | 功能描述:电源开关 IC - 配电 1.2A Current-Limited High-Side PCh Switch RoHS:否 制造商:Exar 输出端数量:1 开启电阻（最大值）:85 mOhms 开启时间（最大值）:400 us 关闭时间（最大值）:20 us 工作电源电压:3.2 V to 6.5 V 电源电流（最大值）: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 |
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