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TS39501CZ5 数据表(PDF) 6 Page - Taiwan Semiconductor Company, Ltd

部件名 TS39501CZ5
功能描述  5A Ultra Low Dropout Positive Voltage Regulator
Download  12 Pages
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制造商  TSC [Taiwan Semiconductor Company, Ltd]
网页  http://www.taiwansemi.com
标志 TSC - Taiwan Semiconductor Company, Ltd

TS39501CZ5 数据表(HTML) 6 Page - Taiwan Semiconductor Company, Ltd

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TS39500/1/2/3
5A Ultra Low Dropout Positive Voltage Regulator
6/12
Version: A07
Application Information (Continue)
Enable Input
TS39501/2/3/4 versions feature an active-high enable (EN) input that allows ON/OFF control of the regulator. Current
drain reduces to “zero” when the device is shutdown, with only micro-amperes of leakage current. The EN input has
TTL/CMOS compatible thresholds for simple interfacing with logic interfacing. EN may be directly tied to VIN and pulled
up to the maximum supply voltage.
Error Flag
TS39501 versions feature an Error Flag, which looks at the output voltage and signals an error condition when this
voltage drops 5% below its expected value. The error flag is an open-collector output that pulls low under fault
conditions. It may sink 10mA. Low output voltage signifies a number of possible problems, including an over-current
fault (the device is in current limit) or low input voltage. The flag output is inoperative during over temperature
shutdown conditions. A pull-up resistor from error flag to either VIN or VOUT is required for proper operation. For
information regarding the minimum and maximum values of pull-up resistance, refer the graph as follow:
Transient Response and 3.3V to 2.5V or 2.5V to 1.8V Conversion
TS39500/1/2/3 has excellent transient response to variations in input voltage and load current. The device have been
designed to respond quickly to load current variations and input voltage variations. Large output capacitors are not
required to obtain this performance. A standard 10uF output capacitor, preferably tantalum, is all that is required.
Larger values help to improve performance even further. By virtue of its low dropout voltage, this device does not
saturate into dropout as readily as similar NPN base designs. When converting from 3.3V to 2.5V or 2.5V to 1.8V, the
NPN based regulators are already operating in dropout, with typical dropout requirements of 1.2V or greater,. To
convert down to 2.5V or 1.8V without operating in dropout, NPN based regulators require an input voltage of 3.7V at
the very least. The TS39500/1/2/3 regulator will provide excellent performance with an input as low as 3.0V or 2.5V
respectively. This gives the PNP based regulators a distinct advantage over older, NPN based linear regulators.
Output Sense
Sense pin can be connected to the load and traces the load voltage, TS39503/4 will adjust the output voltage to
maintain the load at expected voltage.


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