MIC38C45BM Micrel Inc, MIC38C45BM Datasheet - Page 6

• Manufacturer Part Number: MIC38C45BM
• Description: IC CTRLR PWM CURRENT MODE 8-SOIC
• Manufacturer: Micrel Inc

Specifications of MIC38C45BM

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 500kHz
• Duty Cycle: 50%
• Voltage - Supply: 7.6 V ~ 20 V
• Buck: Yes
• Boost: Yes
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-SOIC (3.9mm Width)
• Frequency-max: 500kHz
• Number Of Pwm Outputs: 1
• On/off Pin: No
• Adjustable Output: No
• Topology: Boost/Buck/Flyback/Forward
• Switching Freq: 500KHz
• Operating Supply Voltage (max): 20V
• Output Current: 500A
• Synchronous Pin: No
• Rise Time: 40ns
• Fall Time: 30ns
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 8
• Package Type: SOIC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

MIC38C42/3/4/5
Typical Characteristics
M9999-091107
100
1.2
1.0
0.8
0.6
0.4
0.2
1x10
10
0
1
vs. Error Amplifier Output
0
OSCILLATOR FREQUENCY (Hz)
ERROR AMPLIFIER OUTPUT (V)
Current Sense Amplifier
1.8nF
4
Oscillator Frequency
V
DD
4.7nF
125°C
Configuration
= 15V
2
10nF
-50°C
4
1x10
25°C
200pF
5
470pF
6
1nF
5x10
8
5
100
120
100
10
80
60
40
20
1x10
MIC38C42/43 Output Dead Time
1
0
-60 -30
Current vs. Temperature
Short-Circuit Reference
vs. Oscillator Frequency
10nF
4
V
DD
V
4.7nF
DD
TEMPERATURE (°C)
= 15V
FREQUENCY (Hz)
= 15V
0
30
6
1x10
60
18nF
5
1nF
90 120 150
470pF
200pF
1x10
6
-10
-15
9.0
8.8
8.6
8.4
8.2
8.0
7.8
7.6
7.4
7.2
7.0
25
20
15
10
-5
5
0
-60 -30
0.0
Current vs. Temperature
V
C
Oscillator Discharge
D
L
= 1nF
0.2
= 15V
Output Waveform
TEMPERATURE (°C)
0
MIC38C4x
0.4
TIME (µs)
30
60
0.6
V
V
September 2007
DD
OSC
90 120 150
= 15V
= 2V
0.8
Micrel, Inc.
1.0