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参数资料
| 型号： | G571 |
| 厂商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Single-Slot PCMCIA/CardBus Power Controllers |
| 中文描述： | 单插槽的PCMCIA / CardBus电源控制器 |
| 文件页数： | 9/11页 |
| 文件大小： | 151K |
| 代理商： | G571 |
Ver 1.1
Jan 08, 2001
TEL: 886-3-5788833
http://www.gmt.com.tw
9
G571
Global Mixed-mode Technology Inc.
Thermal limiting prevents destruction of the IC from
overheating if the package power dissipation rating
are exceeded. Thermal limiting disables power output
until the device has cooled.
12V Supply Not Required
Most PC Card switches use the externally supplied
12V to power gate drive and other chip functions,
which require that power be present at all times. The
G571 offers considerable power savings by using an
internal charge pump to generate the required higher
voltages from 5V input; Therefore, the external 12V
supply can be disable except when needed for
flash-memory functions, thereby extending battery
lifetime. Do not ground the 12V switch inputs when the
12-V input is not used. Additional power savings are
realized by the G571 during a software shutdown in
which quiescent current drops to a maximum of 3μA.
3.3V Low Voltage Mode
The G571 will operates in a 3.3V low voltage mode
when 3.3V is only available input voltage (V
I(5V)
= 0).
This allows host and PC Cards to be operated in
low-power 3.3V-only modes such as sleep modes or
pager modes. Note that in these operation mode, the
G571 will derive its bias current from the 3.3V input
pin and only 3.3V can be delivered to the PC Card.
Voltage Transitioning Requirement
PC Cards are migrating from 5V to 3.3V to minimize
power consumption, optimize board space, and in-
crease logic speeds. The G571 meets all combina-
tions of power delivery as currently defined in the
PCMCIA standard. The latest protocol accommodates
mixed 3.3V/5V systems by first powering the card with
5V, then polling it to determine its 3.3V compatibility.
The PCMCIA specification requires that the capacitors
on 3.3V-compatible cards be discharged to below
0.8V before applying 3.3V power. This functions as a
power reset and ensures that sensitive 3.3V circuitry is
not subjected to any residual 5V charge. The G571
offer a selectable V
CC
and V
PP
ground state, in accor-
dance with PCMCIA 3.3V/5V switching specifications.
Output Ground Switches
PC Card specification requires that V
CC
be discharged
within 100 ms. PC Card resistance can not be relied
on to provide a discharge path for voltages stored on
PC
Card
capacitance
high-impedance
isolation by power-management
schemes.
because
of
possible
Power Supply Considerations
The G571 has multiple pins for each of its 3.3V, and
5V power inputs and for switched V
CC
outputs. Any
individual pin can conduct the rated input or output
current. Unless all pins are connected in parallel, the
series resistance is significantly higher than that
specified, resulting in increased voltage drops and lost
power. it is recommended that all input and output
power pins be paralleled for optimum operation.
To increase the noise immunity of the G571, the
power supply inputs should be bypassed with a 1μF
electrolytic or tantalum capacitor paralleled by a
0.047μF to 0.1μF ceramic capacitor. It is strongly
recommended that the switched outputs be bypassed
with a 0.1μF or larger, ceramic capacitor; doing so
improves the immunity of the G571 to electrostatic
discharge (ESD). Care should be taken to minimize
the inductance of PCB traces between the G571 and
the load. High switching currents can produce large
negative voltage transients, which forward biases sub-
strate diodes, resulting in unpredictable performance.
Similary, no pin should be taken below -0.3V.
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| G571S1 | Single-Slot PCMCIA/CardBus Power Controllers |
| G571SZ | CAP TANT 100 UF 16V 7343 |
| G5LE-1-ASI | PCB Relay |
| G5LE-14 | PCB Relay |
| G5LE-14-ACD | PCB Relay |
相关代理商/技术参数 |
参数描述 |
|---|---|
| G57102000A000G | 制造商:SL Power Electronics 功能描述:- Bulk |
| G57121500A000G | 制造商:SL Power Electronics 功能描述:- Bulk |
| G57121700A000G | 制造商:SL Power Electronics 功能描述:- Bulk |
| G5713 | 功能描述:电话连接器 PLUG ASSEMBLY - RoHS RoHS:否 制造商:Switchcraft 标准:1/4 in 开关配置:Switched 型式:Female 位置/触点数量: 端接类型:Solder 安装风格:Chassis (Panel) 方向: |
| G571403S | 制造商:GRAND-TEK TECHNOLOGY 功能描述:14W CBL MNT PLG |
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