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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： | 21/30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 28
Line Regulation iLin Reg j
Line regulation is the ability of the regulator to maintain a constant output voltage as the input voltage
changes. The line regulation is specified as the input voltage is changed from (output voltage Typ+1V) to
(output voltage Typ+6V). This measurement is not influenced by the temperature of the IC and is
measured in a short time.
Load Regulation iLoa d Reg )
Load regulation is the ability of the regulator to maintain a constant output voltage as the load current
changes. The input voltage is set to (output voltage Typ+1V). The output voltage change is measured as
the load current changes from 5 to 100mA and from 5 to 200mA. This measurement is not influenced by
the temperature of the IC and is measured in a short time.
Quiescent Current ( Iq)
The quiescent current is the current which flows through the ground terminal under no load conditions
(Io=0 mA).
Ground Pin Current iIgnd j
The ground pin current is the current which flows through the GND terminal according to load current. It
is measured by (input current-output current).
Ripple Rejection iqq )
Ripple rejection is the ability of the regulator to attenuate the ripple content of the input voltage at the output.
It is specified with the input voltage =iVout{1.5V), Io=10mA, CL=1.0
F and Cfb=4700pF. An Alternating
Current source of (f=1kHz and 200Vp-p) is superimposed to the power-supply voltage. Ripple rejection is
the ratio of the ripple content of the output vs. the input and is expressed in dB. It is typically about 84dB
at 1kHz. The ripple rejection improves when the value of the capacitor at the noise bypass terminal in the
circuit is large. However, the on/off response worsens.
Standby Current
Standby current is the current which flows into the regulator when the control voltage is made 0 volts. It is
measured with an input voltage of 8V.
PROTECTION CIRCUIT S
Short circuit Sensor
This sensor operates when there is excessive output current. The short circuit sensor protects the device if
the output is accidentally shorted to GND. The current flows at the set peak value.
Thermal Sensor
The thermal sensor protects the device if the junction temperature exceeds the safe value (Tj=150
°C).
This temperature rise can be caused by extreme heat, excessive power dissipation caused by large output
voltage drops, or excessive output current. The regulator will shut off when the temperature exceeds the
safe value. As the junction temperature decreases, the regulator will begin to operate again. Under
sustained fault conditions, the regulator output will oscillate as the device turns off then resets. Please
improve heat radiation or lower the input electric power. When heat radiation is poor, the forecast
package loss is not obtained.
dr D
MM
@200pF
0 @200V Min
HBM
@100pF 1.5k 2000V Min
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