Rainbow Electronics MAX1627 - Manual (Page 4)

MAX1626/MAX1627
5V/3.3V or Adjustable, 100% Duty-Cycle,
High-Efficiency, Step-Down DC-DC Controllers
4 _______________________________________________________________________________________
____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 1, T A = +25°C, unless otherwise noted.)
0
-60 -40
MAX1626 SHUTDOWN CURRENT
vs. TEMPERATURE
MAX1626-04
TEMPERATURE (°C)
SHUTDOWN CURRENT (
µ A)
0.1
0.3
0.2
0.5
0.4
0.6
0.7
0.8
-20 0 20 40 60 80 100 120 140
E
C
B
A
D
APPLICATION CIRCUIT
SHUTDOWN CURRENT:
A: V+ = +15V
B: V+ = +10V
C: V+ = +4V
MAX1626 SHUTDOWN
CURRENT:
D: V+ = +16V
E: V+ = +4V
400
0
0 2000 4000
EXT RISE AND FALL TIMES
vs. CAPACITANCE
50
100
300
250
350
MAX1626-10
CAPACITANCE (pF)
t RISE
AND t
FALL
(ns)
200
150
t RISE , V+ = +15V
t FALL , V+ = +5V
t RISE , V+ = +5V
t FALL , V+ = +15V
50
0
-60 -40 -20 40 60 140
EXT RISE AND FALL TIMES
vs. TEMPERATURE
10
5
15
40
35
45
MAX1626-09
TEMPERATURE (°C)
t RISE
AND t
FALL
(ns)
0 20 80
25
20
30
100 120
t FALL , V+ = +5V
C EXT = 1nF
3/5 = 0V
OUT = 50kHz, 0.3Vp-p
, 3.3V DC
t RISE , V+ = +5V
t RISE , t FALL , V+ = +15V
60
-60 -40
MAX1626
V+ QUIESCENT CURRENT
vs. TEMPERATURE
MAX1626-01
TEMPERATURE (°C)
I Q
(
µ A)
62
64
66
68
70
72
-20 0 20 40 60 80 100 120 140
3/5 = 0V
OUT FORCED TO 3.4V
V+ = +16V
V+ = +10V
V+ = +4V
12
0
0 1 2 3 4 5
MAX1626 EXT OFF TIME
vs. OUTPUT VOLTAGE
2
8
10 MAX1626-02
OUTPUT VOLTAGE (V)
EXT OFF TIME (
µ s)
6
4
V+ = +5V
3/5 = GND
3/5 = V+
12
0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
MAX1627 EXT OFF TIME
vs. FB PIN VOLTAGE
2
8
10 MAX1626-03
FB PIN VOLTAGE (V)
EXT OFF TIME (
µ s)
6
4
V+ = +5V
115
85
-60 -40 -20 0 20 40 60 80 100 120 140
CS TRIP LEVEL vs. TEMPERATURE
90
105
110 MAX1626-12
TEMPERATURE (°C)
CS TRIP LEVEL (mV)
100
95
OUT = 0V