LM337
100
RR, RIPPLE REJECTION (dB)
80
60
40
20
0
V
in
− V
out
= 5.0 V
I
L
= 500 mA
f = 120 Hz
T
J
= 25°C
0
−5.0
−10
−15
−20
−25
V
out
, OUTPUT VOLTAGE (V)
−30
−35
−40
RR, RIPPLE REJECTION (dB)
C
Adj
= 10
mF
100
80
C
Adj
= 10
mF
Without C
Adj
Without C
Adj
60
40
20
0
0.01
V
in
= −15 V
V
out
= −10 V
f = 120 Hz
T
J
= 25°C
0.1
1.0
I
O
, OUTPUT CURRENT (A)
10
Figure 11. Ripple Rejection versus Output Voltage
Figure 12. Ripple Rejection versus Output Current
100
RR, RIPPLE REJECTION (dB)
80
C
Adj
=10
mF
60
40
20
0
10
Z O , OUTPUT IMPEDANCE (
Ω
)
V
in
= −15 V
V
out
= −10 V
I
L
= 500 mA
T
J
= 25°C
10
1
V
in
= −15 V
V
out
= −10 V
I
L
= 500 mA
C
L
= 1.0
mF
T
J
= 25°C
Without C
Adj
C
Adj
= 10
mF
10
0
10
−1
Without C
Adj
10
−2
100
1.0 k
10 k
100 k
1.0 M
10 M
10
−3
10
100
f, FREQUENCY (Hz)
1.0 k
10 k
f, FREQUENCY (Hz)
100 k
1.0 M
Figure 13. Ripple Rejection versus Frequency
Figure 14. Output Impedance
Δ
V in, INPUT
ΔV
out , OUTPUT
VOLTAGE CHANGE (V) VOLTAGE DEVIATION (V)
ΔV
out , OUTPUT
VOLTAGE DEVIATION (V)
0.6
0.4
0.2
0
−0.2
−0.4
−0.6
0
−0.5
−1.0
−1.5
0
10
V
in
= −15 V
V
out
= −10 V
I
L
= 50 mA
T
J
= 25°C
C
L
= 1.0
mF
20
t, TIME (ms)
30
40
C
Adj
= 10
mF
Without C
Adj
0.8
0.6
0.4
0.2
0
−0.2
−0.4
0
−0.5
−1.0
0
V
out
= −10 V
I
L
= 50 mA
T
J
= 25°C
C
L
= 1.0
mF
10
20
t, TIME (ms)
30
40
Without C
Adj
C
Adj
= 10
mF
Figure 15. Line Transient Response
I L , LOAD
CURRENT (A)
Figure 16. Load Transient Response
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