Datasheet

MAX8543/MAX8544
Step-Down Controllers with Prebias Startup,
Lossless Sensing, Synchronization, and OVP
_______________________________________________________________________________________ 9
MAX8544 ENABLE WAVEFORMS
MAX8543 toc14
V
EN
5V/div
0
10A/div
2ms/div
V
OUT
I
L
2V/div
V
POK
5V/div
FSYNC AND SYNCO WAVEFORMS
MAX8543 toc15
V
OUT
1V/div
5V/div
2
μ
s/div
V
LX
V
SYNCO
10V/div
V
FSYNC
5V/div
SHORT CIRCUIT AND RECOVERY
MAX8543 toc16
V
IN
10V/div
12V
0
1ms/div
V
OUT
I
IN
1V/div
I
L
10A/div
0
10A/div
OVERVOLTAGE PROTECTION
WITH 15A LOAD
MAX8543 toc17
V
OUT
5V/div
40
μ
s/div
V
DH
V
DL
1V/div
10V/div
0V
0V
5V
5V
PREBIASED STARTUP
(OUTPUT PREBIASED AT 1.5V)
MAX8543 toc18
V
IN
5V/div
1ms/div
V
LX
V
DL
2.5V
10V/div
V
OUT
5V/div
500mV/div
1.5V
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)