MAX1771 Просмотр технического описания (PDF) - Maxim Integrated
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MAX1771 Datasheet PDF : 16 Pages
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12V or Adjustable, High-Efficiency,
Low IQ, Step-Up DC-DC Controller
L1
D03340
220µH–680µH
D1
MBRS1100T3
C5
0.1µF
4
SHDN
5
REF
12
EXT
8
CS
3
Q1
MTD6N10 R9
1
5.1k
3
MAX1771
2
FB
V+
7
GND
6
AGND
C6
10µF
100V
Q2
-48V MMBT8099LT1
R1
R5
0.15Ω 1k
C8
1µF
R7
200Ω
D3
CMPSH-3
C7
R2
220pF
47k
1%
Q3
MMBT8599LT1
R4
C4
100k
2.2µF
R6
20V
200k D2
R3
CMPZ5240/
16k
MMBZ5240BL
1%
C1
220µF
10V
+5V
300mA
C2
220µF
10V
C3
0.33µF
Figure 7. -48V Input to 5V Output at 300mA, Without a Transformer
BATTERY
INPUT
2V TO 12V
3.3V OR 5V
LOGIC
SUPPLY
OFF
ON
0.1µF
2
V+
EXTL
4 SHDN
CS
MAX1771
REF
5
0.1µF
FB
GND
6, 7
L1
22µH
1
8
RSENSE
0.2Ω
3
1N5817
OUTPUT
Adj. = 12V TO 24V
(AS SHOWN)
N
MMFT3055ELT1
47µF
R2
150k
R3
10k
10k
Figure 8. 2V Input to 24V Output LCD Bias
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