MAX1771 Maxim, MAX1771 Datasheet - Page 16

• Manufacturer Part Number: MAX1771
• Description: 12V or Adjustable / High-Efficiency / Low IQ / Step-Up DC-DC Controller
• Manufacturer: Maxim

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12V or Adjustable, High-Efficiency,
Low I
Figure 9. 5V/1A Boost Converter
16
2.7V TO 5.5V
ON
INPUT
______________________________________________________________________________________
0.1 F
OFF
150 F
Q
4
5
SHDN
REF
, Step-Up DC-DC Controller
GND
MAX1771
7
22 H
AGND
6
EXT
CS
V+
FB
1
8
2
3
0.1 F
MTD20N03HDL
0.04
1N5820
232k
100k
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100pF
OUTPUT
330 F
5V
1A
TRANSISTOR COUNT: 501
SUBSTRATE CONNECTED TO V+
___________________Chip Topography
V+
FB
EXT
100
90
80
70
60
50
SHDN
1m
V
IN
EFFICIENCY vs. LOAD CURRENT
= 4V
(2.032mm)
0.080"
LOAD CURRENT (A)
10m
V
IN
= 3V
100m
REF
CS
GND
AGND
(3.200mm)
0.126"
1