Typical operating characteristics – Rainbow Electronics MAX1567 User Manual
Page 9
MAX1566/MAX1567
Six-Channel, High-Efficiency, Digital
Camera Power Supplies
_______________________________________________________________________________________
9
90
0
1
1000
100
10
STEP-UP EFFICIENCY vs. LOAD CURRENT
30
10
70
50
100
40
20
80
60
MAX1566/67 toc01
LOAD CURRENT (mA)
EFFICIENCY (%)
V
IN
= 4.5V
V
IN
= 3.8V
V
IN
= 3.2V
V
IN
= 2.5V
V
IN
= 2.0V
V
IN
= 1.5V
V
SU
= 5V
90
0
1
1000
100
10
MAIN (STEP-UP) EFFICIENCY
vs. LOAD CURRENT
30
10
70
50
100
40
20
80
60
MAX1566/67 toc02
OUTPUT CURRENT (mA)
EFFICIENCY (%)
V
IN
= 3.2V
V
IN
= 2.5V
V
IN
= 2.0V
V
IN
= 1.5V
V
M
= 3.3V
90
0
1
1000
100
10
BOOST-BUCK EFFICIENCY
(SU + MAIN AS STEP-DOWN) vs. LOAD CURRENT
30
10
70
50
100
40
20
80
60
MAX1566/67 toc03
OUTPUT CURRENT (mA)
EFFICIENCY (%)
V
IN
= 4.5V
V
IN
= 3.8V
V
IN
= 3.2V
V
IN
= 2.5V
V
M
= 3.3V
V
SU
= 5V
90
0
1
1000
100
10
STEP-DOWN EFFICIENCY
vs. LOAD CURRENT
30
10
70
50
100
40
20
80
60
MAX1566/67 toc04
LOAD CURRENT (mA)
EFFICIENCY (%)
V
IN
= 2.5V
V
IN
= 3.0V
V
IN
= 3.8V
V
IN
= 4.5V
SD = 1.8V
SD INPUT
CONNECTED
TO BATT
90
10
1
1000
100
10
BOOST-BUCK EFFICIENCY (SU + SD)
vs. LOAD CURRENT
40
20
70
100
50
30
80
60
MAX1566/67 toc05
LOAD CURRENT (mA)
EFFICIENCY (%)
V
IN
= 3.2V
V
IN
= 2.5V
V
IN
= 2.0V
V
IN
= 1.5V
V
SU
= 3.3V
SD = 1.8V
100
95
90
85
80
75
70
1.5
2.5
3.5
4.5
EFFICIENCY vs. INPUT VOLTAGE
MAX1566/67 toc06
INPUT VOLTAGE (V)
EFFICIENCY (%)
SU + SD, I
OUT3
= 350mA
V
M
= 3.3V
I
OUTVM
= 200mA
SU = 5V, I
OUTSU
= 500mA
AUX2 = 8V, I
OUT2
= 100mA
80
0
1
1000
100
10
AUX EFFICIENCY vs. LOAD CURRENT
30
10
60
90
40
20
70
50
MAX1566/67 toc07
LOAD CURRENT (mA)
EFFICIENCY (%)
V
IN
= 4.5V
V
IN
= 3.8V
V
IN
= 3.0V
V
IN
= 2.0V
V
IN
= 1.5V
V
OUT_AUX
= 5V
1
10
100
AUX EFFICIENCY vs. LOAD CURRENT
MAX1566/67 toc08
LOAD CURRENT (mA)
90
30
50
40
80
100
60
70
EFFICIENCY (%)
V
IN
= 4.5V
V
IN
= 3.8V
V
IN
= 3.0V
V
IN
= 2.0V
V
IN
= 1.5V
V
OUT_AUX
= 15V
90
0
10
1
1000
100
10
MAX1567 AUX2 EFFICIENCY
vs. LOAD CURRENT
40
20
70
100
50
30
80
60
MAX1566/67 toc09
LOAD CURRENT (mA)
EFFICIENCY (%)
V
IN
= 2.5V
V
IN
= 3.0V
V
IN
= 3.8V
V
IN
= 4.5V
V
AUX2
= -7.5V
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)