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| 型号： | FPF2313MPX |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 12/17页 |
| 文件大小： | 0K |
| 描述： | IC LOAD SW 2CH ADJ CURR 8-MLP |
| 标准包装： | 1 |
| 系列： | IntelliMax™ |
| 类型： | 高端开关 |
| 输出数： | 2 |
| Rds（开）： | 140 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： | 8-MLP |
| 供应商设备封装： | 8-MLP（3x3） |
| 包装： | 标准包装 |
| 其它名称： | FPF2313MPXDKR |
Table 1: R SET Selection Guide
Output Discharge Resistor
R SET
[ ? ]
511
536
562
590
620
649
681
732
775
Minimum
Current
Limit
[mA]
607
578
552
526
500
478
455
424
400
Typical
Current
Limit
[mA]
674
643
613
584
556
531
506
471
445
Maximum
Current
Limit [mA]
742
707
674
642
611
584
556
518
489
Tolerance
(%)
10
10
10
10
10
10
10
10
10
The FPF2310/2/3 and FPF2313L family contains an 70 ? on-
chip output pull-down resistor for quick output discharge when
the switch is turned off. This features become more attractive
when an application requires a large output capacitor to be
discharged when switch turns off. However, the OUT pin should
not be connected directly to the battery source due to the
discharge mechanism of the load switch.
Thermal Shutdown
The thermal shutdown protects the device from internally or
externally generated excessive temperatures. Each switch has
an individual thermal shutdown protection function and operates
independently as adjacent switch temperature increases above
140°C. If one switch is in normal operation and shutdown
protection of second switch is activated, the first channel
continues to operate if the affected channel's heat stays
confined. The over-temperature in one channel can shut down
both switches due to rapidly generated excessive load currents
resulting in very high power dissipation. Generally, a thermally
improved board layout can provide heat sinking and allow heat
to stay confined and not affect operation of the second switch.
During an over-temperature condition, the affected switch is
turned off. If the temperature of the die drops below the
threshold temperature, the switch automatically turns on again.
To avoid unwanted thermal oscillations, a 10°C (typical) thermal
hysteresis is implemented between thermal shutdown entry and
exit temperatures.
If output of both switches are connected together and an
excessive load current activates thermal protection of both, the
controller can shutdown the switches after both outputs go LOW
and turn on both channels again. This provides a simultaneous
switch turn on. Thermal protection is for device protection and
should not be used as regular application operation.
R SET ( ? )
Figure 35. I LIM vs. R SET
Under-Voltage Lockout (UVLO)
The under-voltage lockout feature turns off the switch if the
input voltage drops below the under-voltage lockout threshold.
With the ON pin is active (ON pin is pulled LOW), the input
voltage rising above the under-voltage lockout threshold causes
a controlled turn-on of the switch and limits current overshoot.
The device detects the UVLO condition when input voltage goes
below UVLO voltage, but remains above 1.3V (typical).
ON
device wake-up
IN
UVLO THRESHOLD
RISE
TIME
90% V OUT
OUT
10% V OUT
I LOAD
I LIMIT
Figure 36. Under-Voltage Lockout (UVLO)
? 2009 Fairchild Semiconductor Corporation
FPF2310/12/13/13L ? Rev. 1.1.3
12
www.fairchildsemi.com
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