Datasheet

MAX1776
24V, 600mA Internal Switch, 100% Duty Cycle,
Step-Down Converter
_______________________________________________________________________________________ 7
LX WAVEFORM, CIRCUIT 1
V
IN
= 15V, I
LOAD
= 500mA
MAX1776 toc22
V
LX
I
L
V
OUT
1A
10V
0
2
µ
s/div
50mV/div
0
Typical Operating Characteristics (continued)
(Circuit of Figure 1, components from Table 3, V
IN
= +12V, SHDN = IN, T
A
= +25°C.)
STARTUP WAVEFORM, CIRCUIT 1,
R
LOAD
= 100Ω
MAX1776 toc23
I
L
V
OUT
5V
1A
0
2
µ
s/div
6V
0
V
SHDN
0
2V
4V
75
0.10 100010 1001
EFFICIENCY vs. I
LOAD
, CIRCUIT 3, V
IN
= 12V
100
85
80
95
90
MAX1776 toc24
I
LOAD
(mA)
EFFICIENCY (%)
L = 22
µ
H
L = 47
µ
H
L = 100
µ
H
75
0.10 100010 1001
EFFICIENCY vs. I
LOAD
, CIRCUIT 3, V
IN
= 12V
100
85
80
95
90
MAX1776 toc25
I
LOAD
(mA)
EFFICIENCY (%)
L = 22
µ
H, 0.6A
L = 10
µ
H, 1.2A
L = 47
µ
H, 0.3A