Datasheet

12V or Adjustable, High-Efficiency,
Low I
Q
, Step-Up DC-DC Controller
___________________Chip Topography
V+
FB
0.126"
(3.200mm)
0.080"
(2.032mm)
EXT
CS
GND
AGND
SHDN REF
TRANSISTOR COUNT: 501
SUBSTRATE CONNECTED TO V+
100
50
1m 10m 100m 1
EFFICIENCY vs. LOAD CURRENT
60
LOAD CURRENT (A)
EFFICIENCY (%)
70
80
90
V
IN
= 3V
MAX1771
GND
76
1N5820
330µF
0.1µF
4
5
1
8
2
3
OUTPUT
5V
1A
0.1µF
232kΩ
100kΩ
0.04Ω
150µF
22µH
MTD20N03HDL
INPUT
2.7V TO 5.5V
CS
EXT
V+
FB
100pF
AGND
SHDN
REF
OFF
ON
V
IN
= 4V
Figure 9. 5V/1A Boost Converter
MAX1771
16
Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical
Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
©
2002 Maxim Integrated
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