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| 型号： | MIC2004-0.5YM5 |
| 厂商： | Micrel Inc |
| 文件页数： | 21/30页 |
| 文件大小： | 0K |
| 描述： | IC DISTRIBUTION SW 0.5A SOT23-5 |
| 标准包装： | 1,050 |
| 类型： | 高端开关 |
| 输出数： | 1 |
| Rds（开）： | 100 毫欧 |
| 内部开关： | 是 |
| 电流限制： | 500mA |
| 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： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 管件 |
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Micrel, Inc.
Functional Description
V IN and V OUT
V IN is both the power supply connection for the internal
circuitry driving the switch and the input (Source
connection) of the power MOSFET switch. V OUT is the
Drain connection of the power MOSFET and supplies
power to the load. In a typical circuit, current flows from
V IN to V OUT toward the load. Since the switch is bi-
directional when enabled, if V OUT is greater than V IN ,
current will flow from V OUT to V IN .
When the switch is disabled, current will not flow to the
load, except for a small unavoidable leakage current of
a few microamps. However, should V OUT exceed V IN by
more than a diode drop (~0.6 V), while the switch is
disabled, current will flow from output to input via the
power MOSFET’s body diode.
If discharging C LOAD is required by your application,
consider using MIC20X4 or MIC20X7; these MIC20XX
family members are equipped with a discharge FET to
insure complete discharge of C LOAD .
Current Sensing and Limiting
MIC20XX protects the system power supply and load
from damage by continuously monitoring current
through the on-chip power MOSFET. Load current is
monitored by means of a current mirror in parallel with
the power MOSFET switch. Current limiting is invoked
when the load exceeds the set over-current threshold.
When current limiting is activated the output current is
constrained to the limit value, and remains at this level
until either the load/fault is removed, the load’s current
requirement drops below the limiting value, or the
switch goes into thermal shutdown.
MIC20xx Family
During this delay period, typically 128ms, a secondary
current limit is in effect. If the load demands a current in
excess the secondary limit, MIC201X acts immediately
to restrict output current to the secondary limit for the
duration of the Kickstart? period. After this time the
MIC201X reverts to its normal current limit. An example
of Kickstart? operation is shown in Figure 3.
Figure 3. Kickstart? Operation
Figure 3 Label Key:
A. MIC201X is enabled into an excessive load (slew
rate limiting not visible at this time scale) The initial
current surge is limited by either the overall circuit
resistance and power supply compliance, or the
secondary current limit, whichever is less.
B. R ON of the power FET increases due to internal
heating (effect exaggerated for emphasis).
Kickstart?
2003 2004 2005X 2006 2007
2013 2014 2015 2016 2017
Only parts in bold have Kickstart?.
(Not available in 5-pin SOT-23 packages)
2008
2018
2009X
2019X
C. Kickstart? period.
D. Current limiting initiated. FAULT/ goes LOW.
E. V OUT is non-zero (load is heavy, but not a dead short
where V OUT = 0V. Limiting response will be the same
for dead shorts).
F. Thermal shutdown followed by thermal cycling.
G. Excessive load released, normal load remains.
The MIC201X is designed to allow momentary current
surges (Kickstart?) before the onset of current limiting,
which permits dynamic loads, such as small disk drives
or portable printers to draw the energy needed to
overcome inertial loads without sacrificing system
safety. In this respect, the Kickstart? parts (MIC201X)
differs markedly from the non-Kickstart? parts
(MIC200X) which immediately limit load current,
potentially starving the motor and causing the appliance
to stall or stutter.
MIC201X drops out of current limiting.
H. FAULT/ delay period followed by FAULT/ going
HIGH.
Undervoltage Lock-Out
Undervoltage lock-out insures no anomalous operation
occurs before the device’s minimum input voltage of
UVLO THRESHOLD which is 2V minimum, 2.25V typical,
and 2.5V maximum had been achieved. Prior to
reaching this voltage, the output switch (power
MOSFET) is OFF and no circuit functions, such as
FAULT/ or ENABLE, are considered to be valid or
operative.
August 2011
21
M9999-080211-D
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2004-1.2YM5 | 功能描述:IC DISTRIBUTION SW 1.2A SOT23-5 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 |
| MIC2004-1.2YM5 TR | 功能描述:电源开关 IC - USB Fixed Current Limit Single High-Side Switch + LdDschg -1.2A - 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 |
| MIC2004-1.2YM5TR | 制造商:Micrel 功能描述:USB Power Switch 2.5V to 5.5V 1.6A |
| MIC2004-1.2YM5-TR | 功能描述:IC DISTRIBUTION SW 1.2A SOT23-5 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）:1.2A 导通电阻（典型值）:70 毫欧 输入类型:非反相 特性:负载释放 故障保护:限流（固定），超温 工作温度:-40°C ~ 85°C（TA） 封装/外壳:SC-74A，SOT-753 供应商器件封装:SOT-23-5 标准包装:1 |
| MIC2004-1.2YM5TX | 功能描述:IC DISTRIBUTION SW 1.2A SOT23-5 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 |
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