Datasheet

   
   

SLUS395J - FEBRUARY 2000 - REVISED MARCH 2009
17
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APPLICATION INFORMATION
Figure 10
MULTIPLIER OUTPUT CURRENT
vs
VOLTAGE ERROR AMPLIFIER OUTPUT
0.0 1.0 2.0 3.0 4.0 5.0
50
200
250
350
0
100
300
150
I
MOUT
- Multiplier Output Current − µA
VAOUT − Voltage Error Amplifier Output − V
IAC = 150 µA
V
FF
= 1.4 V
IAC = 300 µA
V
FF
= 3.0 V
IAC = 500 µA
V
FF
= 4.7 V
Figure 11
MULTIPLIER GAIN
vs
VOLTAGE ERROR AMPLIFIER OUTPUT
1.0 2.0 3.0 4.0 5.0
0.7
1.1
1.3
1.5
0.5
0.9
IAC = 300
µ
A
IAC = 500
µ
A
IAC = 150
µ
A
Multiplier Gain − K
VAOUT − Voltage Error Amplifier Output − V
Figure 12
VFF − Feedforward Voltage − V
1.0 2.0 3.0 4.0 5.0
100
300
400
500
0
200
VAOUT = 3 V
VAOUT = 2 V
VAOUT = 4 V
VAOUT = 5 V
(VFF × I
MOUT
) − µW
MULTIPLIER CONSTANT POWER PERFORMANCE
0.0
Figure 13
10 12 14 16 20
10
14
15
17
8
12
18
9
11
13
16
RECOMMENDED MINIMUM GATE RESISTANCE
vs
SUPPLY VOLTAGE
R
GATE
-
Recommended Minimum Gate Resistance
−
Ω
VCC − Supply Voltage − V