MAX1626 Datasheet, PDF (4/16 Pages) Maxim Integrated Products – 5V/3.3V or Adjustable, 100% Duty-Cycle, High-Efficiency, Step-Down DC-DC Controllers

5V/3.3V or Adjustable, 100% Duty-Cycle,
High-Efficiency, Step-Down DC-DC Controllers
____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 1, TA = +25°C, unless otherwise noted.)
MAX1626 SHUTDOWN CURRENT
vs. TEMPERATURE
0.8
APPLICATION CIRCUIT
A
0.7 _{SHUTDOWN CURRENT:}
A: V+ = +15V
0.6 _{B: V+ = +10V}
C: V+ = +4V
B
0.5
MAX1626 SHUTDOWN
0.4 ^CURRENT:
C
D: V+ = +16V
0.3 ^{E: V+ = +4V}
D
0.2
E
0.1
0
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
MAX1626 EXT OFF TIME
vs. OUTPUT VOLTAGE
12
V+ = +5V
10
8
6
3/5 = V+
4
3/5 = GND
2
0
0
1
2
3
4
5
OUTPUT VOLTAGE (V)
MAX1627 EXT OFF TIME
vs. FB PIN VOLTAGE
12
V+ = +5V
10
8
6
4
2
0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
FB PIN VOLTAGE (V)
EXT RISE AND FALL TIMES
vs. TEMPERATURE
50
45
40
tFALL, V+ = +5V
35
tRISE, V+ = +5V
30
25
20
tRISE, tFALL, V+ = +15V
15
10
CEXT = 1nF
5
3/5 = 0V
OUT = 50kHz, 0.3Vp-p, 3.3VDC
0
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
400
350
300
250
200
150
100
50
0
0
EXT RISE AND FALL TIMES
vs. CAPACITANCE
tRISE, V+ = +15V
tFALL, V+ = +5V
tRISE, V+ = +5V
tFALL, V+ = +15V
2000
CAPACITANCE (pF)
4000
MAX1626
V+ QUIESCENT CURRENT
vs. TEMPERATURE
72
V+ = +16V
70
CS TRIP LEVEL vs. TEMPERATURE
115
OUT = 0V
110
68
V+ = +10V
66
64 V+ = +4V
62
3/5 = 0V
OUT FORCED TO 3.4V
60
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
105
100
95
90
85
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
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