Datasheet

MAX8576–MAX8579
3V to 28V Input, Low-Cost, Hysteretic
Synchronous Step-Down Controllers
_______________________________________________________________________________________ 7
Typical Operating Characteristics (continued)
( T
A
= +25°C, unless otherwise noted.)
OUTPUT OVERVOLTAGE PROTECTION
(CIRCUIT OF FIGURE 2)
MAX8576-79 toc19
200μs/div
V
DH
V
OUT
V
DL
V
FB
20V/div
5V/div
0
0.5V/div
0
1V/div
0
0
NONMONOTONIC OUTPUT-VOLTAGE RISE
(CIRCUIT OF FIGURE 2, MAX8577)
MAX8576-79 toc17
1ms/div
V
IN
V
LX
V
OUT
V
DL
10V/div
1.5V
0.5V/div
20V/div
5V/div
0
SHORT CIRCUIT AND RECOVERY
(CIRCUIT OF FIGURE 2)
MAX8576-79 toc18
10ms/div
V
IN
I
OUT
I
IN
V
OUT
10V/div
2A/div
10A/div
2V/div
0
STARTUP AND SHUTDOWN
(CIRCUIT OF FIGURE 2)
MAX8576-79 toc15
4ms/div
V
GS(Q3)
V
SS
V
OUT
I
LX
10V/div
0
0
0.5V/div
2V/div
0
0
10A/div
MONOTONIC OUTPUT-VOLTAGE RISE
(CIRCUIT OF FIGURE 2, MAX8576)
MAX8576-79 toc16
1ms/div
V
IN
V
LX
V
OUT
V
DL
10V/div
1.5V
0.5V/div
20V/div
5V/div
0