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参数资料
| 型号： | FPF1320UCX |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 13/15页 |
| 文件大小： | 0K |
| 描述： | IC ADVANCED POWER SWITCH 6-WLCSP |
| 标准包装： | 3,000 |
| 系列： | IntelliMax™ |
| 类型： | 高端开关 |
| 输出数： | 1 |
| Rds（开）： | 60 毫欧 |
| 内部开关： | 是 |
| 电流限制： | 1.5A |
| 输入电压： | 1.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-UFBGA，WLCSP |
| 供应商设备封装： | 6-WLCSP |
| 包装： | 带卷 (TR) |
Operation and Application Description
The FPF1320 and FPF1321 are dual-input single-output
power multiplexer switches with controlled turn-on and
seamless power source transition. The core is a 50 m ?
P-channel MOSFET and controller capable of
functioning over a wide input operating range of 1.5 V to
5.5 V per channel. The EN and SEL pins are active-
HIGH, GPIO/CMOS-compatible input. They control the
state of the switch and input power source selection,
respectively. TRCB functionality blocks unwanted
reverse current during both ON and OFF states when
higher V OUT than V IN A or V IN B is applied. FPF1321 has a
65 ? output discharge path during off.
Input Capacitor
To limit the voltage drop on the input supply caused by
transient inrush current when the switch turns on into a
discharged load capacitor; a capacitor must be placed
between the V IN A or V IN B pins to the GND pin. At least
1 μF ceramic capacitor, C IN , placed close to the pins, is
usually sufficient. Higher-value C IN can be used to
reduce more the voltage drop.
Inrush Current
Inrush current occurs when the device is turned on.
Inrush current is dependent on output capacitance and
slew rate control capability, as expressed by:
Power Source Selection
Input power source selection can be controlled by the
SEL pin. When SEL is LOW, output is powered from
V IN A while SEL is HIGH, V IN B is powering output. The
SEL signal is ignored during device OFF.
Output Voltage Drop during Transition
Output voltage drop usually occurs during input power
source transition period from low voltage to high
voltage. The drop is highly dependent on output
capacitance and load current.
FPF1320/1 adopts an advanced break-before-make
control, which can result in minimized output voltage
drop during the transition time.
Output Capacitor
Capacitor C OUT of at least 1 μF is highly recommended
between the V OUT and GND pins to achieve minimized
output voltage drop during input power source transition.
This capacitor also prevents parasitic board inductance.
True Reverse-Current Blocking
The true reverse-current blocking feature protects the
input source against current flow from output to input
regardless of whether the load switch is on or off.
I INRUSH = C OUT ×
where:
V IN ? V INITIAL
t R
+ I LOAD
(1)
Board Layout
For best performance, all traces should be as short as
possible. To be most effective, the input and output
capacitors should be placed close to the device to
C OUT :
t R :
V IN :
Output capacitance;
Slew rate or rise time at V OUT ;
Input voltage, V IN A or V IN B;
minimize the effect that parasitic trace inductance on
normal and short-circuit operation. Wide traces or large
copper planes for power pins (V IN A, V IN B, V OUT and
GND) minimize the parasitic electrical effects and the
thermal impedance.
V INITIAL : Initial voltage at C OUT , usually GND; and
I LOAD :
Load current.
Higher inrush current causes higher input voltage drop,
depending on the distributed input resistance and input
capacitance. High inrush current can cause problems.
FPF1320/1 has a 130 μs of slew rate capability under
3.3 V IN at 1 μF of C OUT and 150 ? of R L so inrush
current and input voltage drop can be minimized.
? 2011 Fairchild Semiconductor Corporation
FPF1320 / FPF1321 ? Rev. 1.0.2
13
www.fairchildsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| FPF1321 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:IntelliMAXa?￠ Dual-Input Single-Output Advanced Power Switch with True Reverse-Current Blocking |
| FPF1321BUCX | 制造商:Fairchild Semiconductor Corporation 功能描述:IC ADVANCED POWER SWITCH 6WLCSP |
| FPF1321UCX | 功能描述:电源开关 IC - 配电 Dual In Signal Out Advance Power Switch 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 |
| FPF15 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| FPF1504 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Advanced Load Management Switch |
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