Typical operating characteristics, Electrical characteristics – Rainbow Electronics MAX1627 User Manual
Page 3
MAX1626/MAX1627
5V/3.3V or Adjustable, 100% Duty-Cycle,
High-Efficiency, Step-Down DC-DC Controllers
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS
(V+ = +3V to +16.5V, SHDN =
3/5 = 0V, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 2)
Note 1:
V+ must exceed V
OUT
to maintain regulation.
Note 2:
Specifications from 0°C to -40°C are guaranteed by design, not production tested.
V+ = SHDN = 16.5V (shutdown)
Operating, no load
I
LOAD
= 0µA
MAX1627
Circuit of Figure 1,
3/5 = V+
MAX1626,
3/5 = V+, output forced to 5V
MAX1627, includes hysteresis
CONDITIONS
µA
2
I
OUT
Supply Current into V+
100
V
3.0
16.5
V+
Input Voltage
V
1.25
1.35
Reference
mV
80
120
CS Threshold Voltage
nA
0
50
FB Leakage Current
V
2.9
Undervoltage Lockout
4.80
5.20
µA
24
50
I
OUT
OUT Input Current
V
1.25
1.35
FB Threshold Voltage
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
Circuit of Figure 1,
3/5 = 0V
V
3.16
3.44
V
OUT
Output Voltage
__________________________________________Typical Operating Characteristics
(Circuit of Figure 1, T
A
= +25°C, unless otherwise noted.)
100
0
0.1m
100m
1
1m
10m
10
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= +3.3V)
20
10
MAX1626-05
LOAD CURRENT (A)
EFFICIENCY (%)
40
30
60
50
70
80
90
A: V+ = +4.3V
B: V+ = +5V
C: V+ = +8V
D: V+ = +10V
E: V+ = +12V
F: V+ = +15V
CIRCUIT OF FIGURE 1
A
B
C
D E F
100
0
0.1m
100m
1
1m
10m
10
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= +5V)
20
10
MAX1626-03
LOAD CURRENT (A)
EFFICIENCY (%)
40
30
60
50
70
80
90
A: V+ = +6V
B: V+ = +8V
C: V+ = +10V
D: V+ = +12V
E: V+ = +15V
CIRCUIT OF FIGURE 1
A
B
C
D E
0.45
0
0
0.5
1.0
1.5
2.0
2.5
DROPOUT VOLTAGE
vs. LOAD CURRENT
0.05
0.10
0.35
0.25
0.30
0.40
MAX1626-11
LOAD (A)
DROPOUT VOLTAGE (V)
0.20
0.15
3.3V SETTING
V
OUT
= +3.17V
5V SETTING
V
OUT
= +4.8V