MAX16922_10 Datasheet, PDF (5/17 Pages) Maxim Integrated Products – 2.2MHz, Dual, Step-Down DC-DC Converters, Dual LDOs, and RESET

2.2MHz, Dual, Step-Down DC-DC
Converters, Dual LDOs, and RESET
Typical Operating Characteristics
(V_PV1 = 13.5V, V_PV2 = V_PV3 = V_OUT1, V_PV4 = V_OUT2; T_A = +25°C, unless otherwise specified.)
OUT1 EFFICIENCY vs. LOAD CURRENT
100
90
80
70
PV1 = 13.5V
60 _{PV1 = 18V}
50
PV1 = 8V
40
30
20
10
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2
LOAD CURRENT (A)
SUPPLY CURRENT vs. TEMPERATURE
1.8
NO LOAD
1.7 _{PWM = GND}
1.6
1.5
1.4
1.3
1.2
1.1
1.0
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
OUT1 EFFICIENCY vs. LOAD CURRENT
100
PV1 = 13.5V
90
T_A = -40°C
80
70
T_A = +125°C
60
T_A = +25°C
50
40
30
20
10
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2
LOAD CURRENT (A)
NORMALIZED OUT1 VOLTAGE
vs. LOAD CURRENT
2.0
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2
I_PV1 (A)
POWER-UP ENABLE TURNING ON
MAX16922 toc07
EN
10V/div
OUT1
5V/div
OUT2
2V/div
OUT3
2V/div
OUT4
1V/div
OUT2 EFFICIENCY vs. LOAD CURRENT
100
90
80
T_A = +125°C ^TA ^{= +25°C}
70
60
PV2 = 5V
OUT2 = 2.7V
50
0.1 0.2 0.3 0.4 0.5 0.6
LOAD CURRENT (A)
5.20
5.15
5.10
5.05
5.00
4.95
4.90
4.85
4.80
6
OUT1 VOLTAGE vs. V_PV1
I_OUT1 = 1A
9
12
15
18
V_PV1 (V)
POWER-UP/DOWN AT
THERMAL SHUTDOWN
MAX16922 toc08
RESET
5V/div
OUT1
5V/div
OUT2
2V/div
OUT3
2V/div
OUT4
1V/div
1ms/div
2ms/div
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