AIC1573 AIC [Analog Intergrations Corporation], AIC1573 Datasheet - Page 19

• Manufacturer Part Number: AIC1573
• Description: 5-bit DAC, Synchronous PWM Power Regulator with Simple PWM Power Regulator, LDO And Linear Controller
• Manufacturer: AIC [Analog Intergrations Corporation]

n
where
The break frequency of Internal Compensation Gain
are given by
PHYSICAL DIMENSIONS
l
F
F
F
F
F
F
Q
1
LC
ESR
Z
Z
P
P
10
1
1
2
2
log
28 LEAD PLASTIC SO (unit: mm)
2
30
C
24
L
400
2
6 .
O
O
2
KHz
KHz
1
KHz
KHz
B
L
1
O
R
R
F
;
C
;
;
ESR
ESR
F
LC
O
1
;
2
C
e
D
2
C
O
L
O
O
;
F
LC
R
F
LOAD
1
Q
2
A
E
H
C
L
Bode Plot of Converter Gain
Sampling theory shows that F
half the switching frequency for the loop stables.
But it must be considerably less than that, or there
will be large amplitude switching frequency ripple at
the output. Thus, the usual practices is to fix F
at 1/4 to 1/5 the switching frequency.
-20
60
40
20
0
100
20log(V
Modulation
Gain
SYMBOL
Fig. 21 Bode Plot of Converter Gain
A1
IN
A
B
C
D
E
H
e
L
/ V
1k
F
F
OSC
LC
F
)
Z1
F
Frequency (KHz)
ESR
10k
F
Z2
17.70
10.00
2.35
0.10
0.33
0.23
7.40
0.40
F
MIN
F
OdB
P1
Compensation Gain
100k
1.27 (TYP)
F
P2
0dB
Closed Loop
Gain
must be less that
1M
AIC1573
18.10
10.65
MAX
2.65
0.30
0.51
0.32
7.60
1.27
10M
19
0dB