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参数资料
| 型号： | MIC2026-2YM TR |
| 厂商： | Micrel Inc |
| 文件页数： | 12/16页 |
| 文件大小： | 0K |
| 描述： | IC SW DISTRIBUTION 2CHAN 8SOIC |
| 标准包装： | 1 |
| 类型： | 高端开关 |
| 输出数： | 2 |
| Rds（开）： | 140 毫欧 |
| 内部开关： | 是 |
| 电流限制： | 900mA |
| 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： | 标准包装 |
| 产品目录页面： | 1114 (CN2011-ZH PDF) |
| 其它名称： | 576-1060-6 |
Micrel, Inc.
T J = P D × θ JA + T A
where:
T J = junction temperature
T A = ambient temperature
θ JA = is the thermal resistance of the package
Current Sensing and Limiting
The current-limit threshold is preset internally. The
preset level prevents damage to the device and external
load but still allows a minimum current of 500mA to be
delivered to the load.
The current-limit circuit senses a portion of the output
MOSFET switch current. The current-sense resistor
shown in the block diagram is virtual and has no voltage
drop. The reaction to an overcurrent condition varies
with three scenarios:
Switch Enabled into Short-Circuit
If a switch is enabled into a heavy load or short-circuit,
the switch immediately enters into a constant-current
mode, reducing the output voltage. The FLG signal is
asserted indicating an overcurrent condition.
Short-Circuit Applied to Enabled Output
MIC2026/2076
Current-Limit Response—Ramped Load
The MIC2026/76 current-limit profile exhibits a small
foldback effect of about 200mA. Once this current-limit
threshold is exceeded the device switches into a
constant current mode. It is important to note that the
device will supply current up to the current-limit
threshold.
Fault Flag
The FLG signal is an N-channel open-drain MOSFET
output. FLG is asserted (active-low) when either an
overcurrent or thermal shutdown condition occurs. In the
case of an overcurrent condition, FLG will be asserted
only after the flag response delay time, t D , has elapsed.
This ensures that FLG is asserted only upon valid
overcurrent conditions and that erroneous error reporting
is eliminated. For example, false overcurrent conditions
can occur during hot plug events when a highly
capacitive load is connected and causes a high transient
inrush current that exceeds the current-limit threshold for
up to 1ms. The FLG response delay time t D is typically
3ms.
Undervoltage Lockout
Undervoltage lockout (UVLO) prevents the output
When a heavy load or short-circuit is applied to an
MOSFET from turning on until V IN
exceeds
enabled switch, a large transient current may flow until
the current-limit circuitry responds. Once this occurs, the
device limits current to less than the short-circuit current
limit specification.
approximately 2.5V. Undervoltage detection functions
only when the switch is enabled.
V EN
V OUT
I LIMIT
I LOAD
I OUT
V FLG
3ms typ.
delay
Short-Circuit Fault
Thermal
Shutdown
Reached
Load and Fault Removed
(Output Reset)
Figure 1. MIC2076-2 Fault Timing: Output Reset by Removing Load
V EN
V OUT
I LIMIT
I LOAD
I OUT
V FLG
Short-Circuit Fault
Load/Fault
Removed
Thermal
Shutdown
Reached
3ms typ.
delay
Figure 2. MIC2026-2 Fault Timing
June 2010
12
M9999-060410-B
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2026A | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Dual-Channel Power Distribution Switch |
| MIC2026A_09 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Dual-Channel Power Distribution Switch |
| MIC2026A-1YM | 功能描述:电源开关 IC - USB Dual USB High-Side Power Switch 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 |
| MIC2026A-1YM TR | 功能描述:电源开关 IC - USB Dual USB High-Side Power Switch 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 |
| MIC2026A-2YM | 功能描述:电源开关 IC - USB Dual USB High-Side Power Switch 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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