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参数资料
| 型号： | TK7403232LCLEX |
| 厂商： | TOKO INC |
| 元件分类： | 固定正电压多路输出LDO稳压器 |
| 英文描述： | DUAL OUTPUT, FIXED POSITIVE LDO REGULATOR, PDSO8 |
| 封装： | SOT-23, 8 PIN |
| 文件页数： | 20/30页 |
| 文件大小： | 913K |
| 代理商： | TK7403232LCLEX |
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TOKO@Inc.
IC Data Sheet
TK740xxL
May 2001
GC3-H010 /D
Page 27
Application @hint
On / off @Control
It is recommended to turn the regulator Off when the circuit following
the regulator is non-operating. A design with a little electric power loss
can be implemented. We recommend the use of the on/off control of the
regulator without using a high side switch to provide an output from
the regulator. A highly accurate output voltage with low voltage drop is
obtained.
Because the control current is small, it is possible to control it directly by CMOS logic.
The PULLDOWN resistance is not built into the control terminal.
The noise and the ripple rejection characteristics depend on the capacitance between the Vout to the Fb
terminal.
The IC will not be damaged if the capacitor value is increased.
Current boost
For current boost applications, use the products below. A low voltage drop, high current regulator can be
easily made.
TK714xx@@
Only the PNP transistor for the current boost is external.
TK732XX@iFor Iout=10A Max regulator)
Built-in Short circuit protection: a constant current can be set by an external resistor.
Definition of Term s
The output voltage tables are specified with a test voltage of Vin = output voltage Typ+1V.
Output Voltage ( Vout)
The output voltage is specified with Vin = output voltage Typ+1V and output current (Iout=5mA).
Maximum Output Current ( Iout Max)
The output current is measured when the output voltage decreases toiVoutTyp.~0.9j. The input voltage is
(output voltage Typ+1V). The maximum output current is measured in a short time so that it is not
influenced by the temperature of the chip.
The output current decreases during low voltage operation.
Please refer to the "Low input voltage-output current" graph for 2.1V or less.
Dropout Voltage ( Vdrop)
The dropout voltage is the difference between the input voltage and the output voltage at which point the
regulator starts to fall out of regulation. Below this value, the output voltage will fall as the input voltage
is reduced. It is dependent upon the load current (Iout) and the junction temperature (Tj).
The input voltage is gradually decreased below the test voltage. It is the voltage difference between the input
and the output when the output voltage decreases by 100mV.
REG
VsatO
P
On/Off Cont.
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