KA78TXX
4
Electrical Characteristics(KA78T15)
(Continued)
(V
I
= 23V, I
O
= 3.0A, 0°C ≤ T
J
≤ +125°C, Po ≤ P
MAX
(Note1), unless otherwise specified.)
Note:
1. Although power dissipation is internally limited, specifications apply only for P
O
≤ Pmax, Pmax = 25W
2. Load and line regulation are specified at constant junction temperature. Change in Vo due heating effects must be taken into
account separately. Pulse testing with low duty is used. ( P
MAX
= 25W)
Parameter Symbol Conditions Min. Typ. Max. Unit
Output Voltage Vo
5mA ≤ Io ≤ 3.0A, T
J
=+25°C
17.5V ≤ VI ≤ 30V, 5mA ≤ Io ≤ 2.0A
14.4
14.25
15
15
15.6
15.75
V
Line Regulation (Note2) ∆V
O
17.6V ≤ VI ≤ 40V, Io=5mA, T
J
=+25°C
17.6V ≤ VI ≤ 40V, Io=1.0A, T
J
=+25°C
18V ≤ VI ≤ 30V, Io =2.0A, T
J
=+25°C
20V ≤ VI ≤ 26V, Io =3.0A, T
J
=+25°C
-7.555mV
Load Regulation (Note2) ∆V
O
5mA ≤ Io ≤ 3.0A, T
J
=+25°C
5mA ≤ Io ≤ 3.0A
-
10
15
30
80
mV
mV
Thermal Regulation
REG
T
Pulse =10ms, P = 20W
TA = +25°C
- 0.002 0.03
%Vo/
W
Quiescent Current I
Q
5mA ≤ Io ≤ 3.0A, T
J
=+25°C
5mA ≤ Io ≤ 3.0A
-
3.5
4.0
5.0
6.0
mA
mA
Quiescent Current Change
∆I
Q
17.6V ≤ VI ≤ 40V, Io = 5mA
T
J
=+25°C ;
18V ≤ VI ≤ 30V, Io =2.0A ;
5mA ≤ Io ≤ 3.0A, T
J
=+25°C
-0.10.8mA
Ripple Rejection RR
f = 120Hz, 18.5V ≤ V
I
≤ 28.5V, Io = 2.0A
T
J
=+25°C
-65- dB
Dropout Voltage V
D
Io = 3A,T
J
=+25°C-2.22.5V
Output Noise Voltage V
N
T
A
=+25°C, 10Hz ≤ f ≤ 100kHz - 10 - µV/Vo
Peak Output Current I
PK
T
A
=+25°C-5.0-A
Output Resistance Ro f = 1.0kHz - 2.0 - mΩ
Short Circuit Current Limit Isc VI = 40V, T
J
=+25°C-1.02.0A
Average Temperature
Coefficient of Output Voltage
∆V
O
/∆T Io = 5.0mA - 0.5 - mV/°C
