Typical operating characteristics – Rainbow Electronics MAX5098A User Manual
Page 6
MAX5098A
Dual, 2.2MHz, Automotive Buck or Boost
Converter with 80V Load-Dump Protection
6
_______________________________________________________________________________________
Typical Operating Characteristics
(See the
Typical Application Circuit, unless otherwise noted. V+ = V
IN_HIGH
= 14V, unless otherwise noted. V+ = V
IN_HIGH
means
that N1 is shorted externally.)
OUTPUT1 EFFICIENCY
vs. LOAD CURRENT
MAX5098A toc01
LOAD (A)
OUTPUT1 EFFICIENCY (%)
1.8
1.6
1.2 1.4
0.6 0.8 1.0
0.4
10
20
30
40
50
60
70
80
90
100
0
0.2
2.0
V
IN
= 8V
V
IN
= 14V
V
IN
= 16V
V
OUT
= 5V
f
SW
= 1.85MHz
OUTPUT2 EFFICIENCY
vs. LOAD CURRENT
MAX5098A toc02
LOAD (A)
OUTPUT2 EFFICIENCY (%)
0.9
0.8
0.6
0.7
0.4
0.5
0.3
0.2
1.0
10
20
30
40
50
60
70
80
90
100
0
V
IN
= 16V
V
IN
= 8V
V
IN
= 14V
V
IN
= 5.5V
V
IN
= 4.5V
V
OUT
= 3.3V
f
SW
= 1.85MHz
OUTPUT1 EFFICIENCY
vs. LOAD CURRENT
MAX5098A toc03
LOAD (A)
OUTPUT1 EFFICIENCY (%)
1.8
1.6
1.2 1.4
0.6 0.8 1.0
0.4
10
20
30
40
50
60
70
80
90
100
0
0.2
2.0
V
IN
= 8V
V
IN
= 14V
V
IN
= 16V
V
OUT
= 5V
f
SW
= 300kHz
L1 = 18
μH
OUTPUT2 EFFICIENCY
vs. LOAD CURRENT
MAX5098A toc04
LOAD (A)
OUTPUT2 EFFICIENCY (%)
0.9
0.8
0.6
0.7
0.4
0.5
0.3
0.2
1.0
10
20
30
40
50
60
70
80
90
100
0
V
IN
= 16V
V
IN
= 8V
V
IN
= 14V
V
IN
= 5.5V
V
IN
= 4.5V
V
OUT
= 3.3V
f
SW
= 300kHz
L2 = 27
μH
OUTPUT1 VOLTAGE
vs. LOAD CURRENT
MAX5098A toc05
LOAD (A)
OUTPUT1 VOLTAGE (V)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
4.92
4.94
4.96
4.98
5.00
4.90
0.2
2.0
V
IN
= 8V
V
IN
= 14V
V
IN
= 16V
V
OUT
= 5V
f
SW
= 1.85MHz
OUTPUT2 VOLTAGE
vs. LOAD CURRENT
MAX5098A toc06
LOAD (A)
OUTPUT2 VOLTAGE (V)
0.9
0.8
0.7
0.6
0.5
0.4
0.3
3.22
3.24
3.26
3.28
3.30
3.20
0.2
1.0
V
IN
= 5.5V
V
IN
= 16V
V
IN
= 14V
V
OUT
= 3.3V
f
SW
= 1.85MHz
V
L
OUTPUT VOLTAGE
vs. CONVERTER SWITCHING FREQUENCY
MAX5098A toc07
CONVERTER SWITCHING FREQUENCY (kHz)
V
L
OUTPUT VOLTAGE (V)
1700
1200
700
4.2
4.4
4.6
4.8
5.0
5.2
5.4
4.0
200
2200
V
IN
= 4.5V
V
IN
= 5.5V
V
IN
= 8V
V
IN
= 19V
V
IN
= 5V
BOTH CONVERTERS SWITCHING
FSEL_1 = V
L
EACH CONVERTER SWITCHING
FREQUENCY vs. R
OSC
MAX5098A toc08
R
OSC
(k
Ω)
SWITCHING FREQUENCY (MHz)
60
40
20
1
0
80
10
0.1
CONVERTER 1, CONVERTER 2
CONVERTER 1
FSEL_1 = V
L
,
FSEL_1 = GND,
EACH CONVERTER SWITCHING
FREQUENCY vs. TEMPERATURE
MAX5098A toc09
TEMPERATURE (
°C)
SWITCHING FREQUENCY (MHz)
-5
30
65
100
1
10
0.1
-40
135
0.3MHz
0.6MHz
1.25MHz
1.85MHz
2.2MHz
FSEL_1 = V
L