ML4818CS Micro Linear, ML4818CS Datasheet - Page 7

• Manufacturer Part Number: ML4818CS
• Description: Phase Modulation/Soft Switching Controller
• Manufacturer: Micro Linear

OUTPUT DRIVER STAGE
The ML4818 has four high current high speed totem pole
output drivers each capable of 1.5A peak output, designed
to quickly switch the gates of capacitive loads, such as
power MOSFET transistors. Figure 8 illustrates the
saturation characteristics of the ouput drive transistors
shown in Figure 7. Typical rise and fall time characteristics
of the output drivers are illustrated with capacitive loads
of 1nF and 10nF in Figure 9.
120
100
80
60
40
20
0
7
6
5
4
3
2
1
0
Figure 8. Output Drive Saturation Voltage vs.
0
Figure 6. Error Amplifier Open-Loop Gain and
0
0.2
100
0.4
Phase vs. Frequency.
Output Current.
1k
SOURCE
SINK
GAIN
0.6
FREQUENCY
OUTPUT CURRENT (A)
10k
0.8
100k
1.0
PHASE
1.2
1M
1.4
10M
180
135
90
45
0
15
10
Figure 7. Power Driver Simplified Schematic.
5
1nF
Figure 9. Output Rise/Fall Time.
100
t
F
10nF
200
V
CC
(ns)
1nF
V
Q2
Q1
100
CC
t
R
10nF
200
OUT
POWER
GND
ML4818
7