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参数资料
| 型号： | FPF2702MPX |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 12/19页 |
| 文件大小： | 0K |
| 描述： | IC LOAD SWITCH 0.4-2A OCP 8MLP |
| 标准包装： | 3,000 |
| 系列： | AccuPower™ |
| 类型： | 高端开关 |
| 输出数： | 1 |
| Rds（开）： | 114 毫欧 |
| 内部开关： | 是 |
| 电流限制： | 可调 |
| 输入电压： | 2.8 V ~ 36 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WDFN 裸露焊盘 |
| 供应商设备封装： | 8-MLP（3x3） |
| 包装： | 带卷 (TR) |
Table 1.
R SET Selection Guide
Power Good
R SET
(k ? )
111
Current Limit [A]
Min. Typ. Max.
2.00 2.50 3.00
Tol. (%)
20
FPF270X has a power good feature. The PGOOD pin is
an open-drain MOSFET that asserts HIGH when the
output voltage reaches 90% of the input voltage (Figure
26). A typical 3% PGOOD hysteresis is added to
124
147
182
220
274
374
549
1.79
1.51
1.22
1.01
0.81
0.59
0.40
2.24
1.89
1.52
1.26
1.01
0.74
0.51
2.69
2.27
1.83
1.51
1.22
0.89
0.61
20
20
20
20
20
20
20
PGOOD to prevent PGOOD from chattering as V OUT
falls near the PGOOD threshold voltage.
The PGOOD pin requires an external pull-up resistor
connected to an external voltage source compatible with
input levels of other chips connected to this pin.
PGOOD is kept LOW when the device is inactive. To
save current in the OFF state, the pull-up resistor of the
PGOOD pin can be connected to the output voltage
when there is no battery, provided that compatibility with
the input levels of other devices connected to PGOOD
is observed. A typical value of 100 kΩ is recommended
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
for the pull up resistor. When the power-good feature is
not used in the application, the PGOOD pin can be
connected to GND.
Thermal Shutdown
Thermal shutdown protects the die from internally or
externally generated excessive temperatures. During an
over-temperature condition; as the temperature
increases above 140°C, FLAGB is activated and the
switch is turned off.
When the die cools down sufficiently (die temperature
drops below the threshold level), the switch
automatically turns on again. To avoid unwanted
100
200
300
R SET (k ? )
400
500
600
thermal oscillations, a 30°C (typical) thermal hysteresis
is implemented between thermal shutdown entry and
Figure 36. I LIM vs. R SET
exit temperatures. Proper board layout is required to
prevent premature thermal shutdown (see Figure 38 for
thermal shutdown behavior on FPF2702) .
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 active (ON pin pulled LOW),
the input voltage rising above the under-voltage lockout
threshold causes a controlled turn-on of the switch
ON
V IN
V OUT
2V
at 2.5 V for V IN rising. The under-voltage lockout
threshold has a 0.1 V hysteresis.
I OUT
I LIM
Thermal Cycling
Device cools off
ON
Over
current
condition
UVLO Threshold
Device Wake up
FLAGB
V IN
FLAGB
Figure 38. FPF2702 Thermal Shutdown Behavior
Rise time
10%V OUT
90%V OUT
V OUT
Figure 37. Under-Voltage Lockout Performance
? 2010 Fairchild Semiconductor Corporation
FPF2700 / FPF2701 / FPF2702 ? Rev. 1.0.3
12
www.fairchildsemi.com
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相关代理商/技术参数 |
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| FPF2702MX | 功能描述:电源开关 IC - POE / LAN AccuPower Advanced Load Mngmnt Products RoHS:否 制造商:Fairchild Semiconductor 开关数量:Single 开关配置:SPST 开启电阻（最大值）:7.3 Ohms 串话: 带宽: 开启时间（最大值）:13 ns 关闭时间（最大值）:20 ns 切换电压（最大）: 工作电源电压:8 V to 26 V 最大工作温度:+ 125 C 安装风格:Through Hole 封装 / 箱体:TO-220F-6 |
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| FPF3003 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:IntelliMAXa?￠ Full Functional Input Power Path Management Switch for Dual-Battery Portable System |
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