WEITRON
http://www.weitron.com.tw
5/7
05-Nov-2010
Parameter Symbol Min Typ Max Unit
V
Output Voltage
T
j
=25°C
Line Regulation
O
=1~100mA, T
j
=25°C
O
=1~40mA, T
j
=25°C
WT78L18
(Refer to the test circuits, Tj=0~125°C, I
O
=40mA, V
in
=26V, C
in
=0.33µF, C
O
=0.1µF unless otherwise specified)
18
17.3
17.1
18.7
18.9
27
19
-
-
180
90
mV
Load Regulation
j
=25°C
Quiescent Current
j
=25°C
70
64
-
-
360
300
mV
V
O
4.7- 6.5 mA
I
Q
Quiescent Current Change
-
-
-
-
1.5
0.1
mA
Q
Output Noise Voltage
89- - µV
V
n
Dropout Voltage
1.7- - V
V
D
Ripple Rejection
j
=0-125°C
3632 - dBRR
20.5V<=V <=33V,
in
I
O
=1mA~40mA,T
j
=0-125°C
I
O
=1mA~70mA, T
j
=0~125°C
17.1
18
18
18.9
I
I
∆V
O
20.5V<=V <=33V,
in
22V<=V <=33V,
in
∆V
O
T
∆I
22V<=V <=33V,
in
T
j
=0-125°C
1mA<=I
O
<=40mA,T
j
=0-125°C
10Hz<=f<=100KHz,
T =25°C
21.5V<=V <=31.5V,
in
T =25°C
WT78LXXG
j
=25°C
