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