-5V/-12V/-15V or Adjustable,
High-Efficiency, Low I
Q
Inverting DC-DC Controllers
MAX774/MAX775/MAX776
__________________________________________Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
MAX774
EFFICIENCY vs. LOAD CURRENT
V
OUT
= -5V (BOOTSTRAPPED)
MAX1774/5/6-01a
MAX774
EFFICIENCY vs. LOAD CURRENT
V
OUT
= -5V (NON-BOOTSTRAPPED)
MA774/5/6--1b
MAX774
EFFICIENCY vs. TEMPERATURE
I
LOAD
= 100mA
80
EFFICIENCY (%)
MAX774/5/6-2
90
V
IN
= 5V
80
EFFICIENCY (%)
V
IN
= 3V
V
IN
= 15V
70
90
V
IN
= 5V
80
EFFICIENCY (%)
V
IN
= 4V
70
V
IN
= 15V
90
I
LOAD
= 600mA
I
LOAD
= 1A
70
60
60
60
V
IN
= 5V
BOOTSTRAPPED
50
1
10
100
1000
LOAD CURRENT (mA)
50
1
10
100
1000
LOAD CURRENT (mA)
50
-40
-20
0
20
40
60
80
100
TEMPERATURE (°C)
MAX776
EFFICIENCY vs. LOAD CURRENT
V
OUT
= -15V (BOOTSTRAPPED)
MA774/5/6-1c
MAX776
EFFICIENCY vs. LOAD CURRENT
V
OUT
= -15V (NON-BOOTSTRAPPED)
MA774/5/6-1d
MAX775
EFFICIENCY vs. OUTPUT CURRENT
V
OUT
= -12V (BOOTSTRAPPED)
MA774/5/6--1
e
90
V
IN
= 6V
90
90
80
EFFICIENCY (%)
V
IN
= 5V
EFFICIENCY (%)
V
IN
= 4V
V
IN
= 3V
80
V
IN
= 15V
70
V
IN
= 6V
V
IN
= 4V
70
EFFICIENCY (%)
V
IN
= 5V
80
V
IN
= 4V
70
V
IN
= 5V
V
IN
= 8V
60
60
60
50
1
10
100
1000
LOAD CURRENT (mA)
50
1
10
100
1000
LOAD CURRENT (mA)
50
1
10
100
1000
OUTPUT CURRENT (mA)
MAX774/MAX775/MAX776
EFFICIENCY vs. LOAD CURRENT
V
OUT
= -24V (NON-BOOTSTRAPPED)
MA774/5/6--1f
MAX774/MAX775/MAX776
EFFICIENCY vs. LOAD CURRENT
V
OUT
= -24V OUTPUT (ZENER CONNECTION)
MA774/5/6--1g
MAX774
EFFICIENCY vs. INPUT VOLTAGE
V
OUT
= -5V AT 100mA
86
EFFICIENCY (%)
84
82
80
NON-BOOTSTRAPPED
78
76
V
OUT
= -5V AT 100mA
MAX774/5/6-3
90
V
IN
= 6V
80
EFFICIENCY (%)
V
IN
= 4V
70
V
IN
= 5V
90
V
IN
= 6V
80
EFFICIENCY (%)
V
IN
= 4V
70
V
IN
= 5V
88
BOOTSTRAPPED
60
60
50
1
10
100
1000
LOAD CURRENT (mA)
50
1
10
100
1000
LOAD CURRENT (mA)
74
2
4
6
8
10
12
14
16
INPUT VOLTAGE (V)
4
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
