Inverting dc-dc controllers, Typical operating characteristics (continued) – Rainbow Electronics MAX776 User Manual
Page 5
MAX774/MAX775/MAX776
-5V/-12V/-15V or Adjustable,
High-Efficiency, Low I
Q
Inverting DC-DC Controllers
_______________________________________________________________________________________
5
2.5
1.5
-60
60
SWITCH OFF-TIME vs. TEMPERATURE
2.0
MAX761-13
TEMPERATURE (°C)
t
OFF
(µs)
0
120
V+ = 5V
_____________________________Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
5.0
2.5
100
START-UP VOLTAGE
vs. LOAD CURRENT (BOOTSTRAPPED)
3.0
4.5
MA744/5/6-14
LOAD CURRENT (mA)
START-UP VOLTAGE (V)
10
1000
3.5
1
4.0
V
OUT
= -12V
V
OUT
= -15V
V
OUT
= -5V
5.0
2.5
0.1
100
START-UP VOLTAGE
vs. LOAD CURRENT (NON-BOOTSTRAPPED)
3.0
4.5
MA744/5/6-15
LOAD CURRENT (mA)
START-UP VOLTAGE (V)
10
1000
3.5
1
4.0
V
OUT
= -24V
V
OUT
= -15V
V
OUT
= -12V
V
OUT
= -5V
2200
800
2
4
10
16
MAX774
MAXIMUM LOAD vs. INPUT VOLTAGE
1200
1000
1800
2000
MAX774/5/6-16
INPUT VOLTAGE (V)
LOAD CURRENT (mA)
8
6
12
14
1600
1400
BOOTSTRAPPED
NON-BOOTSTRAPPED
V
OUT
= -5V
20
-60 -40
60
140
EXT RISE AND FALL TIMES
vs. TEMPERATURE
40
30
MAX774/5/6-9
TEMPERATURE (°C)
t
RISE &
t
FALL
(ns)
40
20
0
-20
80
120
100
50
5V RISE
60
80
70
90
100
120
110
130
5V FALL
12V RISE
12V FALL
C
EXT
= 1nF
-60 -40
60
140
EXT RISE AND FALL TIMES
vs. TEMPERATURE
MAX774/5/6-10
TEMPERATURE (°C)
t
RISE &
t
FALL
(ns)
40
20
0
-20
80
120
100
5V RISE
450
400
500
5V FALL
12V RISE
12V FALL
C
EXT
= 5nF
300
250
350
150
100
200
50
17
15
-60
60
SWITCH ON-TIME vs. TEMPERATURE
16
MAX761-13
TEMPERATURE (°C)
t on
(µs)
0
120
V+ = 5V
8.0
7.8
7.6
7.4
7.2
7.0
6.8
6.6
6.4
6.2
6.0
-60 -40
60
140
SWITCH ON-TIME/OFF-TIME RATIO
MAX774/5/6-6
TEMPERATURE (°C)
t
ON
/t
OFF
RATIO (µs/µs)
40
20
0
-20
80
120
100
V+ = 5V
4.0
0
-60 -40
60
140
SHUTDOWN CURRENT
vs. TEMPERATURE
1.0
0.5
2.5
3.5
MAX774/5/6-7
TEMPERATURE (°C)
I
CC
(µA)
40
20
0
-20
80
120
100
2.0
1.5
3.0
V+ = 15V
V+ = 8V
V+ = 4V