L4959 데이터 시트보기 (PDF) - STMicroelectronics
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L4959 Datasheet PDF : 6 Pages
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L4959
THERMAL DATA
Symbol
Rth j-case
Parameter
Thermal Resistance Junction-case
Value
2
Unit
°C/W
ELECTRICAL CHARACTERISTICS (VS = 18V, Tcase = 25°C, unless otherwise specified.)
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
VS
Operating Supply Voltage
no load
loaded (*)
15
22
30
V
14.4
18
21.6
V
En
Output Noise Voltage
Any reg. supply,
f = 100Hz to 20KHz
200
400
µV
Iq
Quiescent Current
8
mA
5.6V/250mA OUTPUT VOLTAGE
t(s) Vout 5V
5V Output Voltage
IO = 125mA
14.4V < VS < 21.6V
5mA < I < 0.25
c ∆Vline
u ∆Vload
d Vdropout
Line Regulation
Load Regulation
Dropout Voltage
14.4V < VS < 21.6V
5mA < Io < 250mA
Iout = 250mA
ro ) Ilim
Current Limit
VS = 21.6V
P t(s 8.6V/0.6A SWITCHED OUTPUT VOLTAGE
5.45
5.9
V
5.40
6
V
5
50
mV
50
150 mV
2.05 2.7
V
250 325
mA
te c Vout 8V
8.6V Output Voltage
sole rodu ∆Vline
b P ∆Vload
- O te Vdropout
Ilim
) le SWon
t(s so SW off
c b SW hyst
Line Regulation
Load Regulation
Dropout Voltage
Current Limit
Switch ON
Switch OFF
Switch Hysteresis
IO = 300mA
8.4
9.1
V
14.4V < VS < 21.6V 5mA < I < 0.6A 8.3
9.2
V
14.4V < VS < 21.6V
5
50
mV
5mA < Io < 0.6A
50
350 mV
Iout = 0.6A
2.05 2.7
V
VS = 21.6V
0.6
0.8
A
2.31 3.5
V
1.5 2.11
V
200
mV
u O 12V/0.8A SWITCHED OUTPUT VOLTAGE
Prod t(s) - Vout12Va 12V Output Voltage
Iout = 400mA
14.4V < VS < 21.6V
5mA < I < 0.8A
lete uc ∆Vline
d ∆Vload
so ro Vdropout
b P Ilim
O te SVR
Line Regulation
Load Regulation
Dropout Voltage
Current Limit
Supply Voltage Rejection
14.4V < Vs < 21.6V
5mA < Io < 0.8A
Iout = 0.8A
VS = 21.6V
f = 100Hz
f = 10KHz
le SWon Switch ON
so SW off Switch OFF
bSW hyst Switch Hysteresis
O12V/1.3A SWITCHED OUTPUT VOLTAGE
11.7
12.7
V
11.6
12.8
V
10
50
mV
100 350 mV
2.13 2.7
V
0.8
1.1
A
55
75
dB
40
2.31 3.5
V
1.5 2.11
V
200
mV
Vout12Vb 12V Output Voltage
∆Vline
∆Vload
Vdropout
Ilim
Line Regulation
Load Regulation
Dropout Voltage
Current Limit
Iout = 650mA
14.4V < VS < 21.6V
5mA < I < 1.3A
14.4V < Vs < 21.6V
5mA < Io < 1.3A
Iout = 1.3A
VS = 21.6V
11.6
12.6
V
11.5
12.7
V
10
50
mV
200 450 mV
2.15 2.7
V
1.3
1.7
A
3/6
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