MC33363A Motorola, MC33363A Datasheet - Page 4

• Manufacturer Part Number: MC33363A
• Description: HIGH VOLTAGE OFF-LINE SWITCHING REGULATOR
• Manufacturer: Motorola

1.80 V
1.75 V
1.70 V
4
0.15
0.08
100
–20
0.8
0.5
0.3
0.2
0.1
80
60
40
20
0
7.0
10
Figure 5. Error Amp Open Loop Gain and
Figure 3. Oscillator Charge/Discharge
Phase
Figure 7. Error Amplifier Small Signal
100
10
Current versus Timing Resistor
Phase versus Frequency
Transient Response
R T , TIMING RESISTOR (k )
1.0 k
15
Gain
f, FREQUENCY (Hz)
1.0 s/DIV
20
10 k
30
100 k
V O = 1.0 to 4.0 V
V CC = 20 V
R L = 5.0 M
C L = 2.0 pF
T A = 25 C
V CC = 20 V
V CC = 20 V
T A = 25 C
C L = 10 pF
A V = –1.0
T A = 25 C
1.0 M
50
MC33363A
10 M
70
0
30
60
90
120
150
180
3.00 V
1.75 V
0.50 V
– 2.0
–1.0
2.0
1.0
70
60
50
40
30
0
0
1.0
0
Figure 6. Error Amp Output Saturation
Figure 4. Maximum Output Duty Cycle
Figure 8. Error Amplifier Large Signal
MOTOROLA ANALOG IC DEVICE DATA
0.2
Discharge Resistor
versus Timing Resistor Ratio
R D /R T Ratio
Pin 6 to Gnd
Voltage versus Load Current
Source Saturation
(Load to Ground)
I O , OUTPUT LOAD CURRENT (mA)
2.0
Transient Response
TIMING RESISTOR RATIO
Sink Saturation
(Load to V ref )
0.4
1.0 s/DIV
3.0
0.6
Gnd
V ref
5.0
R C /R T Ratio
Charge Resistor
Pin 6 to V reg
V CC = 20 V
T A = 25 C
V CC = 20 V
C L = 10 pF
0.8
A V = –1.0
T A = 25 C
V CC = 20 V
C T = 2.0 nF
T A = 25 C
7.0
1.0
10