參數(shù)資料
型號： UA7908C
廠商： Texas Instruments, Inc.
英文描述： NEGATIVE-VOLTAGE REGULATORS
中文描述： 負電壓調(diào)節(jié)器
文件頁數(shù)： 5/10頁
文件大小： 317K
代理商： UA7908C
μ
SLVS058D JUNE 1976 REVISED APRIL 2004
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics at specified virtual junction temperature, V
I
= 23 V, I
O
= 500 mA (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
μ
A7915C
TYP
15
UNITS
TJ
MIN
14.4
MAX
15.6
25
°
C
Output voltage
IO = 5 mA to 1 A,
P
≤
15 W
VI = 17.5 V to 30 V
VI = 20 V to 26 V
VI = 18.5 V to 28.5 V, f = 120 Hz
IO = 5 mA to 1.5 A
IO = 250 mA to 750 mA
IO = 5 mA
f = 10 Hz to 100 kHz
IO = 1 A
VI = 17.5 V to 30 V,
0
°
C to 125
°
C
14.25
15.75
V
Input regulation
5
3
100
50
mV
Ripple rejection
0
°
C to 125
°
C
54
60
20
8
1
375
1.1
dB
Output regulation
300
150
mV
Temperature coefficient of output voltage
Output noise voltage
Dropout voltage
Bias current
0
°
C to 125
°
C
25
°
C
25
°
C
25
°
C
mV/
°
C
μ
V
V
mA
2
3
Bias current change
VI = 17.5 V to 30 V
IO = 5 mA to 1 A
0.04
0.06
2.1
0.5
0.5
mA
Peak output current
Pulse-testing techniques are used to maintain the junction temperature as close to the ambient temperature as possible. Thermal effects must
be taken into account separately. All characteristics are measured with a 2-
μ
F capacitor across the input and a 1-
μ
F capacitor across the output.
This specification applies only for dc power dissipation permitted by absolute maximum ratings.
25
°
C
A
electrical characteristics at specified virtual junction temperature, V
I
= 27 V, I
O
= 500 mA (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
μ
A7918C
TYP
18
UNITS
TJ
MIN
17.3
MAX
18.7
25
°
C
Output voltage
IO = 5 mA to 1 A,
P
≤
15 W
VI = 21 V to 33 V
VI = 24 V to 30 V
VI = 22 V to 32 V, f = 120 Hz
IO = 5 mA to 1.5 A
IO = 250 mA to 750 mA
IO = 5 mA
f = 10 Hz to 100 kHz
IO = 1 A
VI = 21 V to 33 V,
0
°
C to 125
°
C
17.1
18.9
V
Input regulation
5
3
360
180
mV
Ripple rejection
0
°
C to 125
°
C
54
60
30
10
1
450
1.1
dB
Output regulation
360
180
mV
Temperature coefficient of output voltage
Output noise voltage
Dropout voltage
Bias current
0
°
C to 125
°
C
25
°
C
25
°
C
25
°
C
mV/
°
C
μ
V
V
mA
2
3
1
Bias current change
VI = 21 V to 33 V
IO = 5 mA to 1 A
0.04
0.06
2.1
mA
0.5
Peak output current
Pulse-testing techniques are used to maintain the junction temperature as close to the ambient temperature as possible. Thermal effects must
be taken into account separately. All characteristics are measured with a 2-
μ
F capacitor across the input and a 1-
μ
F capacitor across the output.
This specification applies only for dc power dissipation permitted by absolute maximum ratings.
25
°
C
A
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