MAX8792 Maxim Integrated Products, MAX8792 Datasheet - Page 8

• Manufacturer Part Number: MAX8792
• Description: Single Quick-PWM Step-Down Controller
• Manufacturer: Maxim Integrated Products

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Single Quick-PWM Step-Down
Controller with Dynamic REFIN
8
(MAX8792 Circuit of Figure 1, V
1.5V
0.01
100
0.1
5V
5V
5V
10
50
40
30
20
10
_______________________________________________________________________________________
0
0
0
0
0
1
0
A. SHDN, 5V/div
B. PWRGD, 5V/div
C. DL, 5V/div
6
+85°C
+25°C
NO-LOAD SUPPLY CURRENT I
9
ILIM THRESHOLD VOLTAGE (mV)
SHUTDOWN WAVEFORM
VOLTAGE DISTRIBUTION
20V ILIM THRESHOLD
LOW-NOISE MODE
vs. INPUT VOLTAGE
PWM MODE
INPUT VOLTAGE (V)
12
SKIP MODE
200μs/div
15
D. V
E. INDUCTOR CURRENT,
5A/div
SAMPLE SIZE = 100
OUT
18
, 1V/div
IN
MAX17016 toc19
21
= 12V, V
IN
24
A
B
C
D
E
DD
= 5V, SKIP = GND, R
1.55V
1.45V
1.5V
2.02
2.01
2.00
1.99
1.98
Typical Operating Characteristics (continued)
5V
5V
8A
8A
1A
8A
1A
0
0
0
0
-10
A. I
B. V
A. SHDN, 5V/div
B. PWRGD, 5V/div
OUT
OUT
0
= 1A TO 8A, 10A/div
, 50mV/div
LOAD-TRANSIENT RESPONSE
10 20
SOFT-START WAVEFORM
REF OUTPUT VOLTAGE
vs. LOAD CURRENT
LOAD CURRENT (μA)
30
(HEAVY LOAD)
(PWM MODE)
40
200μs/div
20μs/div
TON
50
C. V
B. INDUCTOR CURRENT,
60
C. INDUCTOR CURRENT,
10A/div
= 200kΩ, T
OUT
10A/div
70
, 1V/div
80
MAX17016 toc17
MAX17016 toc20
90 100
A
110
= +25°C, unless otherwise noted.)
A
B
C
D
A
B
C
1.55V
1.45V
1.5V
10A
5V
5V
8A
1A
0A
50
40
30
20
10
0
0
0
0
0
A. I
B. V
A. SHDN, 5V/div
B. PWRGD, 5V/div
OUT
+85°C
+25°C
OUT
= 1A TO 8A, 10A/div
, 50mV/div
LOAD-TRANSIENT RESPONSE
SOFT-START WAVEFORM
VOLTAGE DISTRIBUTION
REFIN-TO-FB OFFSET
OFFSET VOLTAGE (mV)
(LIGHT LOAD)
(SKIP MODE)
200μs/div
20μs/div
C. V
B. INDUCTOR CURRENT,
C. INDUCTOR CURRENT,
10A/div
SAMPLE SIZE = 100
OUT
10A/div
, 1V/div
MAX17016 toc18
MAX17016 toc21
A
B
C
D
A
B
C