参数资料
| 型号： | FPF2213 |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 10/14页 |
| 文件大小： | 0K |
| 描述： | IC LOAD SWITCH MICROFET6 |
| 标准包装： | 1 |
| 类型： | 高端开关 |
| 输出数： | 1 |
| Rds（开）： | 325 毫欧 |
| 内部开关： | 是 |
| 电流限制： | 可调 |
| 输入电压： | 1.8 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-MLP |
| 供应商设备封装： | 6-MicroFET（2x2） |
| 包装： | 标准包装 |
| 产品目录页面： | 1218 (CN2011-ZH PDF) |
| 其它名称： | FPF2213DKR |
Application Information
Setting Current Limit
The FPF2213, FPF2214, and FPF2215 have adjustable high
precision current limit which is set with an external resistor
connected between ISET and GND. Please see the layout
recommendation section of the application note for the
recommended R SET layout. The R SET resistance is selected by
using the following equation:
305
275
245
215
185
I LIM (Typ) (mA) =
7050
R SET (K )
155
125
Max
Typ
Min
95
For a particular I LIM (min) value, R SET can be calculated from
below formula:
26
32
38 44
R SET (KOhms)
Figure 21. I LIM vs R SET
50
56
62
R SET (K ) =
7050
I LIM (Min) (mA) + 10 +
750
I LIM (Min) (mA)
Input Capacitor
To limit the voltage drop on the input supply caused by transient
in-rush currents when the switch is turned on into a discharged
load capacitor or a short-circuit, a capacitor is recommended to
FPF221X family has 5% precision at higher load current. The
I LIM (Max) and tolerance of current limit value can be determined
using Figure 21 (I LIM vs R SET ) and the following formula:
be placed between V IN and GND. A 1uF ceramic capacitor, C IN ,
placed close to the pins is usually sufficient. Higher values of
C IN can be used to further reduce the voltage drop.
Output Capacitor
Tolerance (%) = 100 *
I LIM (Typ) - I LIM (Min)
I LIM (Typ)
A 0.1uF capacitor C OUT , should be placed between V OUT and
GND. This capacitor will prevent parasitic board inductances
from forcing V OUT below GND when the switch turns-off. For the
FPF2213 and FPF2214, the total output capacitance needs to
I LIM (Typ) + LIM (Typ)
I LIM (Max) =
I
* Tolerance (%)
100
be kept below a maximum value, C OUT (max), to prevent the
part from registering an over-current condition and turning-off
the switch. The maximum output capacitance can be
determined from the following formula:
C OUT (Max) =
The table and figure below can be used to select R SET :
R SET Min. Current Typ. Current Max. Current
[k ] Limit [mA] Limit [mA] Limit [mA]
26.8 250 263 276
28.0 238 252 265
Tol
[%]
5.0
5.4
I LIM (Max) * t BLANK (Min)
V IN
Power Dissipation
During normal on-state operation, the power dissipated in the
device will depend upon the level at which the current limit is
29.4
30.0
32.4
36.5
40.2
48.7
60.0
226
221
204
179
160
129
100
240
235
218
193
175
145
118
253
249
232
208
190
161
135
5.7
5.8
6.4
7.5
8.5
11.1
15.0
set. The maximum allowed setting for the current limit is 250mA
and will result in a power dissipation of:
P = (I LIM ) 2 * R DS = (0.25) 2 * 0.275 = 17mW
If the part goes into current limit, maximum power dissipation
will occur when the output is shorted to ground. For the
FPF2213, the power dissipation will be scaled by the Auto-
Restart Time, t RSTRT , and the Over Current Blanking Time,
t BLANK . Therefore, the maximum power dissipated is:
Table 1: R SET Selection Guide
P (Max) =
t BLANK
t BLANK + t RSTRT
* V IN (Max) * I LIM (Max)
=
30
30 + 450
* 5.5 * 0.276 = 94mW
FPF2213-FPF2215 Rev. C
10
www.fairchildsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| FPF2214 | 功能描述:电源开关 IC - 配电 Adj High Precision Current Limit 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 |
| FPF2215 | 功能描述:电源开关 IC - 配电 Adj High Precision Current Limit 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 |
| FPF2223 | 功能描述:电源开关 IC - 配电 Adj High Precision Current Limit 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 |
| FPF2224 | 功能描述:电源开关 IC - 配电 Adj High Precision Current Limit 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 |
| FPF2225 | 功能描述:电源开关 IC - 配电 Adj High Precision Current Limit 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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