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G551 参数 Datasheet PDF下载

G551图片预览
型号: G551
PDF下载: 下载PDF文件 查看货源
内容描述: 限流开关 [Current-Limit Switches]
分类和应用: 开关
文件页数/大小: 1 页 / 559 K
品牌: GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
   
Global Mixed-mode Technology Inc.
G551/G552
Current-Limit Switches
Features
700mΩ On-Resistance
2 Versions of Current Limits, 85mA (G551B1/ B2 &
G552B1/B2) and 170mA (G551A1/A2 & G552A1/ A2)
2V to 5.5V Supply Range
Undervoltage Lockout
85μA Supply Current
1μA Maximum Shutdown Current
Auto-Restart Function (G551A1/B1 & G552A1/B1)
or Latch-off Function (G551A2/B2 & G552A2/B2)
Active High Enable (G551) or Active Low Enable
(G552)
Thermal-Shutdown Protection
Reverse-Current Limit Protection
40ms Blanking Time
280ms Auto-Restart Time (G551A1/B1 & G552A1/B1)
Fault
FLAG Function
Fast Current-Limit Response Time
SC-70-5( SOT-353) Package
General Description
The G551/G552 family of switches feature internal cur-
rent limiting to prevent host devices from being dam-
aged due to faulty load conditions. These analog
switches have a low 0.7Ω on-resistance and operate
from a 2.0V to 5.5V input voltage range. They are
available with guaranteed 50mA and 100mA current
limits, making them ideal for load-switching applica-
tions.
When the switch is on and a load is connected to the
port, a typical blanking time of 40ms ensures that the
transient voltages settle down. If after this blanking
time the load current is greater than the current limit,
the G551A2/B2 & G552A2/B2 enter a latch-off state
where the switch is turned off and
FLAG is issued to
the microprocessor. The switch can be turned on again
by cycling the power or the ON pin.
Applications
PDAs
Cell Phones
GPS Systems
Hand-Held Devices
The G551A1/B1 & G552A1/B1 have an auto-restart
feature where the switch turns off after the blanking
time and then continuously checks to see if the over-
load condition is present. The switch remains on after
the overload condition disappears. The ON pin of
G551 series are active high, while G552 series are
active low.
Pin Configuration
Typical Application Circuit
G551/G552
G551/G552
VOUT
1
5
VIN
V
IN
VIN
OUT
V
OUT
GND
2
FLAG
FLAG
GND
ON
(ON)
ON
OFF
FLAG
3
4
ON
(ON)
SC-70-5 (SOT-353)
() is for G552
Ver: 1.3
Aug 24, 2009
TEL: 886-3-5788833
http://www.gmt.com.tw
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