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参数资料
| 型号： | MAX1823AEUB+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/13页 |
| 文件大小： | 0K |
| 描述： | IC SW USB DUAL W/FB 10-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 应用： | USB，外设 |
| 电流 - 电源： | 50µA |
| 电源电压： | 4 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-µMAX |
| 包装： | 管件 |
Dual USB Switch with Fault
Blanking and Autoreset
After the fault condition is removed, the FAULT_ output
deasserts after a 20ms delay. Ensure that the MAX1823
has adequate input bypass capacitance to prevent
glitches from triggering FAULT_ outputs. Input glitches
greater than 0.2V/μs may cause erroneous FAULT_
indications.
Behavior During Current Limit
and Fault Blanking
The MAX1823 limits switch current in three ways. When
ON_ is deasserted (high for MAX1823/MAX1823A, low
for MAX1823B/MAX1823H), the switch is off and leak-
age dominates the residual output current. When ON_
is asserted (low for MAX1823/MAX1823A, high for
MAX1823B/MAX1823H), the switch supplies a continu-
ous output current of at least 720mA. When the output
current exceeds the 0.9A threshold, the MAX1823 lim-
its the current depending on the output voltage. For
V OUT_ greater than 1V (current-limit mode), the
MAX1823 regulates the output current to 0.9A. For
V OUT_ less than 1V (short-circuit mode), the MAX1823
pulses the switch, decreasing the current to 0.35A RMS
(Table 1). Note that a thermal overload may result from
either of these high-current conditions.
The MAX1823 switches may enter current limit in nor-
mal operation when powering up or driving heavy
capacitive loads. To differentiate these conditions from
short circuits or sustained overloads that may damage
the device, the MAX1823 has an independent fault-
blanking circuit in each switch. When a load transient
causes the device to enter current limit, an internal
counter starts to monitor the duration of the fault. For
load faults exceeding 20ms fault-blanking time, the
switch turns off, the FAULT_ signal asserts low, and the
device enters autoreset mode (see the Autoreset Mode
section). Only current-limit and short-circuit faults are
blanked. Thermal-overload faults and input voltage
drops below the UVLO threshold immediately cause
the switch to turn off and FAULT_ to assert low.
INA
FAULTA
INA
ONA
*(ONA)
CHARGE
PUMP
BIAS
ILIM
OUTA
UVLO
THERMAL
SHUTDOWN
25mA
1 μ F
4V TO 5.5V
REF
FAULT
LOGIC
GND
IN_
0.1 μ F
OSC
25kHz
TIMER
20ms
25mA
OUTB
*(ONB)
MAX1823/MAX1823A
MAX1823B/MAX1823H
CHARGE
ILIM
1 μ F
ONB
INB
*( ) ARE FOR THE MAX1823B/MAX1823H.
Figure 2. Functional Diagram
PUMP
FAULTB
INB
10
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1823AEUB+ | 功能描述:电源开关 IC - USB Dual USB Switch w/Fault Blank RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| MAX1823AEUB+T | 功能描述:电源开关 IC - USB Dual USB Switch w/Fault Blank RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| MAX1823AEUB-T | 功能描述:电源开关 IC - USB Dual USB Switch w/Fault Blank RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| MAX1823BEUB | 功能描述:电源开关 IC - USB Dual USB Switch w/Fault Blank RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
| MAX1823BEUB+ | 功能描述:电源开关 IC - USB Dual USB Switch w/Fault Blank RoHS:否 制造商:Micrel 电源电压-最小:2.7 V 电源电压-最大:5.5 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:SOIC-8 封装:Tube |
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