MAX8792 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX8792 Datasheet PDF : 28 Pages
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Single Quick-PWM Step-Down
Controller with Dynamic REFIN
Typical Operating Characteristics (continued)
(MAX8792 Circuit of Figure 1, VIN = 12V, VDD = 5V, SKIP = GND, RTON = 200kΩ, TA = +25°C, unless otherwise noted.)
NO-LOAD SUPPLY CURRENT IIN
vs. INPUT VOLTAGE
100
10
PWM MODE
REF OUTPUT VOLTAGE
vs. LOAD CURRENT
2.02
2.01
REFIN-TO-FB OFFSET
VOLTAGE DISTRIBUTION
50
+85°C
SAMPLE SIZE = 100
40 +25°C
30
1
LOW-NOISE MODE
2.00
20
0.1
1.99
SKIP MODE
10
0.01
6
9 12 15 18 21 24
INPUT VOLTAGE (V)
20V ILIM THRESHOLD
VOLTAGE DISTRIBUTION
50
+85°C
SAMPLE SIZE = 100
40 +25°C
30
20
10
0
ILIM THRESHOLD VOLTAGE (mV)
SHUTDOWN WAVEFORM
MAX8792 toc19
5V
A
0
5V
B
0
5V
0
C
1.5V
D
0
0
E
1.98
0
-10 0 10 20 30 40 50 60 70 80 90 100 110
LOAD CURRENT (μA)
SOFT-START WAVEFORM
(HEAVY LOAD)
MAX8792 toc17
5V
A
5V
0
0
5V
5V
B
0
0
1.5V
1.5V
C
0
0
8A
D
0
0
OFFSET VOLTAGE (mV)
SOFT-START WAVEFORM
(LIGHT LOAD)
MAX8792 toc18
A
B
C
D
A. EN, 5V/div
B. PGOOD, 5V/div
200μs/div
C. VOUT, 1V/div
B. INDUCTOR CURRENT,
10A/div
LOAD-TRANSIENT RESPONSE
(PWM MODE)
MAX8792 toc20
A. EN, 5V/div
B. PGOOD, 5V/div
200μs/div
C. VOUT, 1V/div
B. INDUCTOR CURRENT,
10A/div
LOAD-TRANSIENT RESPONSE
(SKIP MODE)
MAX8792 toc21
8A
8A
A
A
1A
1A
1.55V
1.55V
B
B
1.45V
1.45V
8A
10A
C
C
1A
0A
A. EN, 5V/div
B. PGOOD, 5V/div
C. DL, 5V/div
200μs/div
D. VOUT, 1V/div
E. INDUCTOR CURRENT,
5A/div
20μs/div
A. IOUT = 1A TO 8A, 10A/div C. INDUCTOR CURRENT,
B. VOUT, 50mV/div
10A/div
20μs/div
A. IOUT = 1A TO 8A, 10A/div C. INDUCTOR CURRENT,
B. VOUT, 50mV/div
10A/div
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