參數(shù)資料
型號(hào)： TK71617ASCL
廠商： TOKO Inc.
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： LOW DROPOUT VOLTAGE REGULATOR
中文描述： 低壓差穩(wěn)壓器
文件頁(yè)數(shù)： 18/20頁(yè)
文件大?。?/td> 111K
代理商： TK71617ASCL
Page 18
December 1999 TOKO, Inc.
TK716xx
PARALLEL ON/OFF CONTROL
The figure below illustrates multiple regulators being
controlled by a single ON/OFF control signal. The series
resistor R is put in the input line of the low output voltage
regulator in order to prevent overdissipation. The voltage
dropped across the resistor reduces the large input-to-
output voltage across the regulator, reducing the power
dissipation in the device.
SWITCHING OPERATION
Even though the input voltages or the output voltages are
different, the outputs of the TK716xx regulators can be
connected together, and the output voltages switched. If
two or more TK716xx regulators are turned ON
simultaneously, the highest output voltage will be present.
The outputs of the TK716xx regulator and a CMOS regulator
can be connected together as long as the output voltage of
the TK716xx is greater than the CMOS regulator. When
the TK716xx is OFF, the CMOS regulator is turned ON.
When the TK716xx is ON, the CMOS regulator is turned
OFF.
APPLICATION INFORMATION (CONT.)
TK71650
5 V
VIN
TK71630
TK71620
3 V
2 V
ON/OFF CONTROL
R
TK71630
VIN
TK71628
VIN
3.0VOUT
ON/OFF LOGIC
VCONT
VCONT
CURRENT BOOST OPERATION
The output current can be increased by connecting an
external PNP transistor as shown below. The output
current capability depends upon the H
fe
of the external
transistor. Note: The TK716xx internal short circuit
protection and thermal sensor do not protect the external
transistor.
TK716xx
VIN
RECMOS
VOUT
ON/OFF LOGIC
TK716xx
VIN
VOUT
VCONT
0.22 μF
150
VIN
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TK71617ASCLH 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:LOW DROPOUT VOLTAGE REGULATOR
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TK71617ASILH 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:LOW DROPOUT VOLTAGE REGULATOR
TK71617SCL 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:LOW DROPOUT VOLTAGE REGULATOR
TK71617SCLH 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:LOW DROPOUT VOLTAGE REGULATOR
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