Rainbow Electronics MAX17101 - Manual (Page 10)

MAX17101
Dual Quick-PWM, Step-Down Controller
with Low-Power LDO, RTC Regulator
10 ______________________________________________________________________________________
5V OUTPUT EFFICIENCY
vs. LOAD CURRENT
MAX17101 toc01
LOAD CURRENT (A)
EFFICIENCY (%)
1 0.1
60
55
70
80
90
65
75
85
95
100
50
0.01 10
20V
12V
7V
SKIP MODE
PWM MODE
5V OUTPUT EFFICIENCY
vs. LOAD CURRENT
MAX17101 toc02
LOAD CURRENT (A)
EFFICIENCY (%)
1 0.1
60
70
80
90
100
50
65
75
85
95
55
0.01 10
SKIP MODE
PWM MODE
ULTRASONIC
MODE
12V
3.3V OUTPUT EFFICIENCY
vs. LOAD CURRENT
MAX17101 toc03
LOAD CURRENT (A)
EFFICIENCY (%)
1 0.1
60
70
80
90
100
50
65
75
85
95
55
0.01 10
20V
12V
7V
5V SMPS ENABLED
SKIP MODE
PWM MODE
3.3V OUTPUT EFFICIENCY
vs. LOAD CURRENT
MAX17101 toc04
LOAD CURRENT (A)
EFFICIENCY (%)
1 0.1
60
70
80
90
100
50
65
75
85
95
55
0.01 10
SKIP MODE
5V SMPS ENABLED
PWM MODE
ULTRASONIC
MODE
12V
SMPS OUTPUT VOLTAGE DEVIATION
vs. LOAD CURRENT
MAX17101 toc05
LOAD CURRENT (A)
OUTPUT VOLTAGE DEVIATION (%)
1 0.1
-2
-1
0
1
2
3
-3
0.01 10
PWM MODE
12V
LOW-NOISE
ULTRASONIC
SKIP MODE
SWITCHING FREQUENCY
vs. LOAD CURRENT
MAX17101 toc06
LOAD CURRENT (A)
SWITCHING FREQUENCY (kHz)
1 0.1
10
100
1000
1
0.01 10
PWM MODE
LOW-NOISE
ULTRASONIC
MODE
SKIP MODE
12V
5V LDO OUTPUT VOLTAGE
vs. LOAD CURRENT
MAX17101 toc07
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
100 120 40 60 80
4.9
4.8
5.1
5.0
5.2
4.7
0 20 140
3.3V RTC OUTPUT VOLTAGE
vs. LOAD CURRENT
MAX17101 toc08
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
10 4 6 8
3.2
3.1
3.3
3.5
3.4
3.0
0 2 12
NO-LOAD INPUT SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX17101 toc09
INPUT VOLTAGE (V)
SUPPLY CURRENT (mA)
15 20 5 10
1
10
100
0.01
0.1
0 25
PWM MODE
LOW-NOISE
ULTRASONIC
SKIP MODE
Typical Operating Characteristics
(Circuit of Figure 1, V IN = 12V, V DD = V CC = 5V, TON = REF, T A = +25°C, unless otherwise noted.)