5 V/3 .3 V o r Ad ju s t a b le , 1 0 0 % Du t y-Cyc le ,
Hig h -Effic ie n c y, S t e p -Do w n DC-DC Co n t ro lle rs
ELECTRICAL CHARACTERISTICS
/MAX1627
(V+ = +3V to +16.5V, SHDN = 3/5 = 0V, T = -40°C to +85°C, unless otherwise noted.) (Note 2)
A
PARAMETER
Input Voltage
SYMBOL
CONDITIONS
MIN
TYP
MAX
16.5
100
2
UNITS
V+
3.0
V
Operating, no load
Supply Current into V+
Undervoltage Lockout
Output Voltage
I
µA
V
OUT
V+ = SHDN = 16.5V (shutdown)
2.9
4.80
3.16
24
5.20
3.44
50
Circuit of Figure 1, 3/5 = V+
Circuit of Figure 1, 3/5 = 0V
MAX1626, 3/5 = V+, output forced to 5V
MAX1627, includes hysteresis
MAX1627
V
OUT
V
OUT Input Current
FB Threshold Voltage
FB Leakage Current
CS Threshold Voltage
Reference
I
µA
V
OUT
1.25
0
1.35
50
nA
mV
V
80
120
1.35
I
= 0µA
1.25
LOAD
Note 1: V+ must exceed V
to maintain regulation.
OUT
Note 2: Specifications from 0°C to -40°C are guaranteed by design, not production tested.
__________________________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
(Circuit of Figure 1, T = +25°C, unless otherwise noted.)
A
DROPOUT VOLTAGE
vs. LOAD CURRENT
EFFICIENCY vs. LOAD CURRENT
EFFICIENCY vs. LOAD CURRENT
(V = +5V)
OUT
(V = +3.3V)
OUT
0.45
0.40
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
C
B
C
B
A
A
0.35
0.30
0.25
3.3V SETTING
= +3.17V
D
E
V
OUT
D E
F
5V SETTING
= +4.8V
0.20
0.15
0.10
0.05
0
V
A: V+ = +4.3V
B: V+ = +5V
C: V+ = +8V
D: V+ = +10V
E: V+ = +12V
F: V+ = +15V
OUT
A: V+ = +6V
B: V+ = +8V
C: V+ = +10V
D: V+ = +12V
E: V+ = +15V
CIRCUIT OF FIGURE 1
0.1m 1m 10m
LOAD CURRENT (A)
CIRCUIT OF FIGURE 1
0.1m 1m 10m
0
0.5
1.0
1.5
2.0
2.5
100m
1
10
100m
1
10
LOAD (A)
LOAD CURRENT (A)
_______________________________________________________________________________________
3
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
