MAX8599 Maxim Integrated Products, MAX8599 Datasheet - Page 7

• Manufacturer Part Number: MAX8599
• Description: Low-Dropout Wide-Input-Voltage Step-Down Controllers
• Manufacturer: Maxim Integrated Products

(Circuit of Figure 4, T
(AC-COUPLED)
V
COMP
V
V
13
12
11
10
OUT
V
V
V
V
OUT
V
9
8
7
6
5
4
DL
LX
IN
LX
IN
0
HEAVY-DROPOUT WAVEFORMS
OUTPUT PREBIASED STARTUP
OUTPUT VOLTAGE vs. V
1
_______________________________________________________________________________________
A
CIRCUIT OF FIGURE 1
= +25°C, 500kHz switching frequency, V
2
(V
IN
10µs/div
V
1ms/div
ADJ
= 12V)
3
CIRCUIT OF FIGURE 1
R
(V)
LOAD
= 1.2Ω
4
ADJ
Low-Dropout, Wide-Input-Voltage,
MAX8597 toc11
MAX8597 toc07
5
6
11.9V
10V/div
500mV/div
500mV/div
10V/div
1.2V
1.0V
5V/div
5V/div
Typical Operating Characteristics (continued)
IN
= 12V, unless otherwise noted.)
Step-Down Controllers
(AC-COUPLED)
V
V
V
COMP
V
OUT
V
POK
OUT
I
V
V
LX
EN
LX
IN
1ms RISE
TIME
5ms RISE
TIME
ENTERING DROPOUT WAVEFORMS
STARTUP/SHUTDOWN WITH
OUTPUT TRACKING REFIN
CIRCUIT OF FIGURE 1
EN (I
LOAD
2ms/div
2µs/div
1ms/div
= 20A)
CIRCUIT OF FIGURE 3
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MAX8597 toc08
MAX8597 toc10
MAX8597 toc12
10A/div
5V/div
1V/div
5V/div
10V/div
11V
500mV/div
100mV/div
V
V
1V/div
V
V
1V/div
REFIN
OUT
REFIN
OUT
7