Datasheet

MAX8792
Single Quick-PWM Step-Down
Controller with Dynamic REFIN
_______________________________________________________________________________________ 7
1.05V OUTPUT EFFICIENCY
vs. LOAD CURRENT
MAX8792 toc04
LOAD CURRENT (A)
EFFICIENCY (%)
10.1
30
40
50
60
70
80
90
100
20
0.01 10
7V
20V
SKIP MODE
PWM MODE
12V
1.05V OUTPUT EFFICIENCY
vs. LOAD CURRENT
MAX8792 toc05
LOAD CURRENT (A)
EFFICIENCY (%)
10.1
30
40
50
60
70
80
90
100
20
0.01 10
SKIP MODE
PWM MODE
LOW-NOISE
MODE
1.05V OUTPUT VOLTAGE
vs. LOAD CURRENT
MAX8792 toc06
LOAD CURRENT (A)
OUTPUT VOLTAGE (V)
4682
1.05
1.04
1.06
1.07
1.03
010
SKIP MODE
PWM MODE
LOW-NOISE
MODE
SWITCHING FREQUENCY
vs. LOAD CURRENT
MAX8792 toc07
LOAD CURRENT (A)
SWITCHING FREQUENCY (kHz)
10.1
50
100
150
200
250
300
350
0
0.01 10
SKIP MODE
LOW-NOISE
MODE
PWM MODE
PWM MODE SWITCHING FREQUENCY
vs. INPUT VOLTAGE
MAX8792 toc08
INPUT VOLTAGE (V)
SWITCHING FREQUENCY (kHz)
14 1810
250
270
260
280
290
300
310
320
330
240
622
I
LOAD
= 5A
NO LOAD
SWITCHING FREQUENCY
vs. TEMPERATURE
MAX8792 toc09
TEMPERATURE (°C)
SWITCHING FREQUENCY (kHz)
20 40 60 80-20 0
280
290
300
270
-40 100
I
LOAD
= 10A
I
LOAD
= 5A
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
MAX8792 toc10
INPUT VOLTAGE (V)
MAXIMUM OUTPUT CURRENT (A)
15 18 21912
13.1
13.0
13.4
13.3
13.2
13.6
13.5
12.9
624
MAXIMUM OUTPUT CURRENT
vs. TEMPERATURE
MAX8792 toc11
TEMPERATURE (°C)
MAXIMUM OUTPUT CURRENT (A)
20 40 60 80 100-20 0
13
12
11
17
16
14
15
20
19
18
10
-40
WITHOUT TEMPERATURE
COMPENSATION
R4 = R5 = 49.9kΩ
WITH
TEMPERATURE
COMPENSATION
(FIGURE 1)
NO-LOAD SUPPLY CURRENT I
BIAS
vs. INPUT VOLTAGE
MAX8792 toc12
INPUT VOLTAGE (V)
I
BIAS
(mA)
12 15 18 219
6
4
2
10
8
12
14
16
0
624
SKIP MODE
PWM MODE
LOW-NOISE MODE
Typical Operating Characteristics (continued)
(MAX8792 Circuit of Figure 1, V
IN
= 12V, V
DD
= 5V, SKIP = GND, R
TON
= 200kΩ, T
A
= +25°C, unless otherwise noted.)