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ML4823CS Datasheet(PDF) 6 Page - Micro Linear Corporation

Part # ML4823CS
Description  High Frequency Power Supply Controller
PDF  9 Pages
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Manufacturer  MICRO-LINEAR [Micro Linear Corporation]
Direct Link  http://www.microlinear.com
Logo MICRO-LINEAR - Micro Linear Corporation

ML4823CS Datasheet(HTML) 6 Page - Micro Linear Corporation

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ML4823
6
ERROR AMPLIFIER
The ML4823 error amplifier is a 5.5MHz bandwidth 12V/
µs
slew rate op-amp with provision for limiting the positive
output voltage swing (Output Inhibit line) for ease in
implementing the soft start function.
5
4
3
2
1
0
0.2
0.4
0.6
0.8
1.0
TIME (
µs)
VIN
VOUT
100
80
60
40
20
0
–20
100
1K
10K 100K
1M
10M
FREQ (Hz)
100M
0
0
–90
–180
GAIN
φ
Figure 5. Unity Gain Slew Rate
Figure 6. Open Loop Frequency Response
OUTPUT DRIVER STAGE
The ML4823 Output Driver is a 2A peak output high speed
totem pole circuit designed to quickly switch the gates of
capacitive loads, such as power MOSFET transistors.
Figure 8. Saturation Curves
3
2
1
0
0
0.5
1.0
1.5
IOUT (A)
SOURCE
SINK
Figure 7. Simplified Schematic
POWER
GND
Q1
Q2
OUT
VCC
POWER
VC
15
10
5
0
0
40
80
120
160
200
TIME (ns)
0.2
IL (A)
0
–0.2
15
10
5
0
0
100
200
300
400
500
TIME (ns)
2
IL (A)
0
–2
Figure 10 Rise/Fall Time (CL = 10,000pF)
Figure 9. Rise/Fall Time (CL = 1000pF)



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