MIC38HC42 Micrel Semiconductor, MIC38HC42 Datasheet - Page 6

• Manufacturer Part Number: MIC38HC42
• Description: BiCMOS 1A Current-Mode PWM Controllers
• Manufacturer: Micrel Semiconductor

MIC38HC42/3/4/5
Typical Characteristics
MIC38HC42/3/4/5
100
1.2
1.0
0.8
0.6
0.4
0.2
0.0
10
1x10
1
0
ERROR AMPLIFIER OUTPUT (V)
OSCILLATOR FREQUENCY (Hz)
vs. Error Amplifier Output
4.7nF
Current Sense Amplifier
4
V
Oscillator Frequency
DD
10nF
125°C
= 15V
2
Configuration
-50°C
1x10
4
25°C
200pF
5
470pF
6
1nF
1.8nF
1x10
8
6
100
120
100
10
80
60
40
20
1x10
1
0
Time vs. Oscillator Frequency
MIC38C/HC42/43 Output Dead
-60 -30
Current vs. Temperature
10nF
4
Short-Circuit Reference
V
DD
V
4.7nF
DD
TEMPERATURE (°C)
= 15V
FREQUENCY (Hz)
= 15V
0
30 60 90 120 150
6
1x10
18nF
5
1nF
470pF
200pF
1x10
6
9.0
8.8
8.6
8.4
8.2
8.0
7.8
7.6
7.4
7.2
7.0
-10
-15
25
20
15
10
-5
5
0
-60 -30
0.0
Current vs. Temperature
V
C
D
L
Oscillator Discharge
= 1nF
0.2
= 15V
Output Waveform
TEMPERATURE (°C)
0
MIC38C4x
0.4
TIME (µs)
30 60 90 120 150
0.6
V
V
DD
OSC
= 15V
= 2V
0.8
August 2000
1.0
Micrel