MC33035, NCV33035
V
CC
= 20 V
V
C
= 20 V
T
A
= 25°C
,
OSC OSCILLATOR FREQUENCY CHANGE (%)
100
f OSC, OSCILLATOR FREQUENCY (kHz)
4.0
V
CC
= 20 V
V
C
= 20 V
R
T
= 4.7 k
C
T
= 10 nF
2.0
10
0
C
T
= 100 nF
0
1.0
C
T
= 10 nF
C
T
= 1.0 nF
− 2.0
R
T
, TIMING RESISTOR (kΩ)
Δ
f
10
100
1000
− 4.0
− 55
− 25
0
25
50
75
100
125
T
A
, AMBIENT TEMPERATURE (°C)
Figure 1. Oscillator Frequency versus
Timing Resistor
Figure 2. Oscillator Frequency Change
versus Temperature
φ
, EXCESS PHASE (DEGREES)
Vsat , OUTPUT SATURATION VOLTAGE (V)
A VOL, OPEN LOOP VOLTAGE GAIN (dB)
56
48
40
32
24
16
8.0
0
− 8.0
−16
− 24
1.0 k
V
CC
= 20 V
V
C
= 20 V
V
O
= 3.0 V
R
L
= 15 k
C
L
= 100 pF
T
A
= 25°C
10 k
100 k
f, FREQUENCY (Hz)
1.0 M
Gain
Phase
40
60
80
0
V
ref
Source Saturation
(Load to Ground)
− 0.8
−1.6
1.6
0.8
0
0
V
CC
= 20 V
V
C
= 20 V
T
A
= 25°C
100
120
140
160
180
200
220
Gnd
Sink Saturation
(Load to V
ref
)
5.0
240
10 M
1.0
2.0
3.0
4.0
I
O
, OUTPUT LOAD CURRENT (mA)
Figure 3. Error Amp Open Loop Gain and
Phase versus Frequency
Figure 4. Error Amp Output Saturation
Voltage versus Load Current
VO, OUTPUT VOLTAGE (V)
3.0
2.95
VO, OUTPUT VOLTAGE (V)
3.05
A
V
= +1.0
No Load
T
A
= 25°C
4.5
A
V
= +1.0
No Load
T
A
= 25°C
3.0
1.5
1.0
μs/DIV
5.0
μs/DIV
Figure 5. Error Amp Small−Signal
Transient Response
Figure 6. Error Amp Large−Signal
Transient Response
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