Rainbow Electronics MAX773 - Manual (Page 11)

MAX770–MAX773
5V/12V/15V or Adjustable, High-Efficiency,
Low I Q , Step-Up DC-DC Controllers
______________________________________________________________________________________ 11
GND
MAX773
C3
0.1
µ F
V OUT
= 12V
V+
R4
63.4k
(1%)
R3
10k
(1%)
SGND
LBO
EXTH
8
5
7
6
EXTL
CS
V12
V15
V5
REF
LBI
SHDN
FB
2
14
1
10
4
13
12
11
9
R
SENSE
N
Si9410DY
C4
C2
0.1
µ F
VIN
L1
22
µ H
D1
1N5817
100k
C1
R4 = R3
(
V TRIP
-1
)
V REF
MIN NOMINAL MAX
10.6 11.0 11.4
V TRIP (V)
3
V REF = 1.5V
GND
MAX773
C3
0.1
µ F
V+
EXTL
CS
V12
8
5
7 V5
FB
SGND
LBO
REF
LBI
SHDN
4
10
12
11
1
2
6
9
R SENSE
0.4 Ω
C4
150 µ F
C2
0.1
µ F
D1
1N5818
V15 14
EXTH 13
C1
47 µ F
3
L1
150 µ H
910 Ω
R1
34k
R2
510k
ZTX694B
V OUT = 24V
@ 30mA
V IN = 5V
V
OUT
V REF
R2 = (R1)
(
-1
)
V REF = 1.5V
GND
MAX773
C3
0.1
µ F
V+
EXTL
CS
V5
8
7
6
V15
V12
SGND
LBO
REF
SHDN
FB
4
10
V IN = 5V
12
11
2
14
1
9
R SENSE
C4
C2
0.1
µ F
D1
1N5817
EXTH 13
3
L1
22 µ H
V OUT = 15V
LBI
N
Si9410DY
5
C1
GND
MAX773
C3
0.1
µ F
V+
EXTL
CS
V5
8
5
7
V15
V12
LBO
REF
LBI
SHDN
4
VIN
12
11
2
14
1
9
R SENSE
C4
D1
1N5817
EXTH 13
3
L1
20 µ H
V OUT = 16V
SGND
N
10
C1
C2
0.1
µ F
FB 6
R2
133k
R1
13.7k
V OUT
V
REF
R2 = (R1)
(
-1
)
V REF = 1.5V
Si9410DY
Figure 3a. 12V Preset Output, Bootstrapped, N-Channel
Power MOSFET Figure 3b. 24V Output, Non-Bootstrapped, NPN Power
Transistor
Figure 3c. 15V Preset Output, Non-Bootstrapped N-Channel
Power MOSFET Figure 3d. 16V Output, Bootstrapped, N-Channel
Power MOSFET