参数资料
型号: MIC2019A-2YM6 TR
厂商: Micrel Inc
文件页数: 25/30页
文件大小: 0K
描述: IC POWER SWITCH 2.0A SOT23-6
标准包装: 1
类型: 高端开关
输出数: 1
Rds(开): 220 毫欧
内部开关:
电流限制: 可调
输入电压: 2.5 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: SOT-23-6
供应商设备封装: SOT-23-6
包装: 标准包装
产品目录页面: 1114 (CN2011-ZH PDF)
其它名称: 576-3584-6
Micrel, Inc.
MIC20xx Family
1.2
1.0
0.8
0.6
0.4
0.2
Normalized Output Current
vs. Output Voltage (2.5V)
C SLEW ’s Effect on I LIMIT
An unavoidable consequence of adding C SLEW
capacitance is a reduction in the MIC20X5 – 20X8’s
ability to quickly limit current transients or surges. A
sufficiently large capacitance can prevent both the
primary and secondary current limits from acting in time
to prevent damage to the MIC20X5 – 20X8 or the
system from a short circuit fault. For this reason, the
upper limit on the value of C SLEW is 4nF.
0
0
0.5 1.0 1.5 2.0 2.5
OUTPUT VOLTAGE (V)
3.0
Variable Undervoltage Lock Out (VUVLO)
2003 2004 2005X 2006 2007 2008
2009X
2013
2014
2015
2016
2017
2018
2019X
Figure 7. Normalized Output Current vs. Output Voltage
Only parts in bold have VUVLO pin and functionality.
C SLEW
2003
2013
2004
2014
2005X
2015
2006
2016
2007
2017
2008
2018
2009X
2019X
Power-conscious systems, such as those implementing
ACPI, will remain active even in their low-power states
and may require the support of external devices
through both phases of operation. Under these
14
0.014
0.012
T DELAY
0.01
Only parts in bold have CSLEW pin.
(Not available in 5-pin SOT-23 packages).
The C SLEW pin is provided to increase control of the
output voltage ramp at turn-on. This input allows
designers the option of decreasing the output’s slew
rate (slowing the voltage rise) by adding an external
capacitance between the C SLEW and V IN pins. This
capacitance slows the rate at which the pass FET gate
voltage increases and thus, slows both the response to
an Enable command as well as V OUT ’s ascent to its final
value.
Figure 8 illustrates effect of C SLEW on turn-on delay and
output rise time.
Typical Turn-on Times
vs. External C Capacitance
SLEW
T ON
12
10
0.008 8
conditions, the current allowed these external devices
may vary according to the system’s operating state and
as such require dual current limits on their peripheral
ports. The MIC20X6 is designed for systems
demanding two primary current limiting levels but
without the use of a control signal to select between
current limits.
To better understand how the MIC20X6 provides this,
imagine a system whose main power supply supports
heavy loads during normal operation, but in sleep mode
is reduced to only few hundred milliamps of output
current. In addition, this system has several USB ports
which must remain active during sleep. During normal
operation, each port can support a 500mA peripheral,
but in sleep mode their combined output current is
limited to what the power supply can deliver minus
whatever the system itself is drawing.
If a peripheral device is plugged in which demands
more current than is available, the system power supply
will sag, or crash. The MIC20X6 prevents this by
monitoring both the load current and V IN . During normal
operation, when the power supply can source plenty of
0 0 0 0 0 0 0 0 0 0 0
0.006 6
0.004 4
0.002 2
0
T RISE
0.5 1 1.5 2 2.5 3 3.5 4 4.5
C SLEW (nF)
current, the MIC20X6 will support any load up to its
factory programmed current limit. When the weaker,
standby supply is in operation, the MIC20X6 monitors
V IN and will shut off its output should V IN dip below a
predetermined value. This predetermined voltage is
user programmable and set by the selection of the
resistor divider driving the VUVLO pin.
Figure 8. C SLEW vs. Turn-On, Delay and Rise Times
August 2011
25
M9999-080211-D
相关PDF资料
PDF描述
ECM12DRAN CONN EDGECARD 24POS R/A .156 SLD
SK101M200ST CAP ALUM 100UF 200V 20% RADIAL
94SVPD226X0035E12 CAP ALUM 22UF 35V 20% SMD
REF195GRUZ-REEL7 IC VREF SERIES PREC 5V 8-TSSOP
V300C2E50BL3 CONVERTER MOD DC/DC 2V 50W
相关代理商/技术参数
参数描述
MIC2019BM6 功能描述:IC DISTRIBUTION SW ADJ SOT23-6 RoHS:否 类别:集成电路 (IC) >> PMIC - 电源分配开关 系列:- 特色产品:XRP252 Switches 标准包装:1 系列:- 类型:高端开关 输出数:2 Rds(开):140 毫欧 内部开关:是 电流限制:1.15A 输入电压:1.75 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-WFDFN 裸露焊盘 供应商设备封装:10-TDFN(3x3) 包装:Digi-Reel® 其它名称:1016-1691-6
MIC2019BM6 TR 功能描述:IC DISTRIBUTION SW ADJ SOT23-6 RoHS:否 类别:集成电路 (IC) >> PMIC - 电源分配开关 系列:- 特色产品:XRP252 Switches 标准包装:1 系列:- 类型:高端开关 输出数:2 Rds(开):140 毫欧 内部开关:是 电流限制:1.15A 输入电压:1.75 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-WFDFN 裸露焊盘 供应商设备封装:10-TDFN(3x3) 包装:Digi-Reel® 其它名称:1016-1691-6
MIC2019YM6 功能描述:IC DISTRIBUTION SW ADJ SOT23-6 RoHS:是 类别:集成电路 (IC) >> PMIC - 电源分配开关 系列:- 特色产品:XRP252 Switches 标准包装:1 系列:- 类型:高端开关 输出数:2 Rds(开):140 毫欧 内部开关:是 电流限制:1.15A 输入电压:1.75 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-WFDFN 裸露焊盘 供应商设备封装:10-TDFN(3x3) 包装:Digi-Reel® 其它名称:1016-1691-6
MIC2019YM6 TR 功能描述:电源开关 IC - USB Programmable Current Limit Single High-Side Switch w/Kickstart + Flag - Lead Free 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
MIC2019YM6-TR 功能描述:IC DISTRIBUTION SW ADJ SOT23-6 制造商:microchip technology 系列:- 包装:剪切带(CT) 零件状态:停产 开关类型:通用 输出数:1 比率 - 输入:输出:1:1 输出配置:高端 输出类型:P 通道 接口:开/关 电压 - 负载:2.5 V ~ 5.5 V 电压 - 电源(Vcc/Vdd):不需要 电流 - 输出(最大值):2A 导通电阻(典型值):70 毫欧 输入类型:非反相 特性:- 故障保护:限流(可调),超温 工作温度:-40°C ~ 85°C(TA) 封装/外壳:SOT-23-6 供应商器件封装:SOT-23-6 标准包装:1