参数资料
| 型号： | BD4153FV-E2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 8/20页 |
| 文件大小： | 0K |
| 描述： | IC PWR MGMT SWITCH 24SSOP |
| 标准包装： | 2,000 |
| 应用： | LDO（线性），带复位功能 |
| 输入电压： | 4.5 V ~ 5.5 V |
| 输出数： | 2 |
| 输出电压： | 3.3V，可调 |
| 工作温度： | -30°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 24-SSOP |
| 包装： | 带卷 (TR) |
BD4153FV,BD4153EFV
Technical Note
● Description of operations
VCC
BD4153FV/EFV has an independent power input pin for an internal circuit operation in order to activate UVLO, Input logic,
and charge pump, the maximum current through which is rated to 2 mA. It is recommended to connect a bypass capacitor
of 0.1 μ F or so to VCC pin.
EN
With an input of 2.3 volts or higher, this terminal turns to “High” level to activate the circuit, while it turns to “Low” level to
deactivate the circuit (with the standby circuit current of 35 μ A), discharges each output and lowers output voltage If the input
is lowered to 0.8 volts or less.
V3_IN, V15_IN, and V3AUX_IN
These are the input terminals for each channel of a 3ch switch. V3 _ IN and V15 _ IN terminals have two pins each, which
should be short-circuited on the pc board with a thick conductor.
And V3AUX IN terminal should be short-circuited to VCC
terminal. Through these three terminals, a big current runs (V3 _ IN: 1.35A, V3AUX _ IN: 0.275 A, and V15 _ IN: 0.625 A). In
order to lower the output impedance of the power supply to be connected, it is recommended to provide ceramic capacitors
(of B-characteristics or better) between these terminals and ground; 1 μ F or so between V3 _ IN and GND and between
V15 _ IN and GND, and 0.1 μ F or so between V3AUX _ IN and GND.
V3, V15, and V3AUX
These are the output terminals for each switch. V3 and V15 terminals have two pins each, which should be short-circuited
on the pc board and connected to an ExpressCard connector with a thick conductor as shortest as possible. In order to
stabilize the output, it is recommended to provide ceramic capacitors (of B-characteristics or better) between these terminals
and ground; 10 μ F or so between V3 and GND and between V15 and GND, and 1 μ F or so between V3AUX and GND.
CPPE#
The pin used to find whether a PCI-Express signal compatible card is provided or not. Turns to “High” level with an input of
2.3 volts or higher, which means that no card is provided, while it turns to “Low” level when the input is lowered to 0.8 volts or
less, which means that a card is provided.
Controls turning ON/OFF of the switch according to the status of the system.
CPUSB#
The pin used to find whether a USB2.0 signal compatible card is provided or not. Turns to “High” level with an input of 2.3
volts or higher, which means that no card is provided, while it turns to “Low” level when the input is lowered to 0.8 volts or
less, which means that a card is provided. Controls turning ON/OFF of the switch according to the system status.
SYSR
The pin used to detect the system status. Turns to “High” level with an input of 2.3 volts or higher, which means that the
system is activated, while it turns to “Low” level when the input is lowered to 0.8 volts or less, which means that the system is
on standby.
PERST_IN#
The pin used to control a reset signal to a card (PERST#) from the system side. (Also referred to as “SysReset#” by
PCMCIA.) Turns to “High” level with an input of 2.3 volts or higher, and turns PERST# to “High” level AND with a “Power
Good” output. Turns to “Low” level and turns PERST# to “Low” level when the input is lowered to 0.8 volts or less.
PERST#
The pin used to provide a reset signal to a PCI-Express compatible card. The status is determined by each output,
PERST#_IN, CPPE# system status, and EN on/off status. Turns to “High” level and activates the PCI-Express compatible
card only if each output is within the “Power Good” threshold with the card kept inserted and with PERST_IN# turned to
“High” level.
PERST#_DELAY
Delay during which the level at PERST# pin turns from Low to High may be set with a capacitor externally applied. The
delay time is determined by the regulated current (2 μ A), the reference voltage (0.7 volts) inside the IC and the capacitance
of the capacitor externally applied. The delay time is specified as “at least 1 ms” in “ExpressCard Standard”. It does not
synchronize with PERST_IN#, and it synchronizes only with a “Power Good” output inside the IC. Turns to “Low” level
when SW is turned OFF.
OC
Turns its output to “Low” level if an overcurrent condition is detected. This open drain output may be pulled up to 3.6 volts
power supply via resistor.
OC-Delay
Delay during which the level at OC pin turns from High to Low may be set with a capacitor externally applied. The delay
time is determined by the regulated current (2 μ A), the reference voltage (0.7 volts) inside the IC and the capacitance of the
capacitor externally applied. May be used to control with the OC status fed back to the system.
If fed back to EN terminal
of this IC, it may be used to turn OFF the output that is provided when an overcurrent condition is detected.
www.rohm.com
? 2010 ROHM Co., Ltd. All rights reserved.
8/17
2010.04 - Rev.B
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相关代理商/技术参数 |
参数描述 |
|---|---|
| BD4154FV | 制造商:ROHM 制造商全称:Rohm 功能描述:Power Switch IC for ExpressCardTM |
| BD4154FV_09 | 制造商:ROHM 制造商全称:Rohm 功能描述:Power Switch IC for ExpressCardTM |
| BD4154FV_10 | 制造商:ROHM 制造商全称:Rohm 功能描述:Power Switch IC for ExpressCard |
| BD4154FV-E2 | 功能描述:热插拔功率分布 POWER SWITCH IC EXPRESSCARD RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| BD4155FV | 制造商:ROHM 制造商全称:Rohm 功能描述:Power Switch IC for ExpressCard |
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