Datasheet

6Maxim Integrated
MAX16909
36V, 220kHz to 1MHz Step-Down Converter
with Low Operating Current
Typical Operating Characteristics (continued)
(V
SUP
= V
SUPSW
= V
EN
= 14V, V
OUT
= 1.8V, R1 = 80.6kΩ, R2 = 100kΩ, T
A
= +25NC (Figure 4), unless otherwise noted.)
OUTPUT RESPONSE TO SLOW INPUT
(ILOAD = 3A)
MAX16909 toc12
V
IN
V
LX
V
PGOOD
V
OUT
5V/div
10V/div
10V/div
2V/div
0V
0V
0V
0V
2s/div
1.8V/400kHz
0.6I RESISTIVE LOAD
LOAD DUMP TEST (1.8V/400kHz)
MAX16909 toc11
V
IN
V
OUT
10V/div
2V/div
0V
0V
10ms/div
14V
42V
UNDERVOLTAGE PULSE (1.8V/400kHz)
MAX16909 toc10
V
SUPSW
V
LX
I
LOAD
V
OUT
2V/div
5V/div
20V/div
5A/div
0A
0V
0V
0V
20ms/div
SUP = 5V
RESISITIVE LOAD = 0.6I
FSYNC TRANSITION FROM INTERNAL
TO EXTERNAL FREQUENCY (1.8V/400kHz)
MAX16909 toc09
V
FSNC
V
LX
5V/div
10V/div
0V
0V
2µs/div
f
FSYNC
= 440kHz
SKIP-MODE LOAD-TRANSIENT
RESPONSE (1.8V/400kHz)
MAX16909 toc08
V
OUT
AC-COUPLED
I
LOAD
50mV/div
10mA/div
0A
100µs/div
V
IN
= 14V
PWM MODE LOAD-TRANSIENT
RESPONSE (1.8V/400kHz)
MAX16909 toc07
V
OUT
AC-COUPLED
I
LOAD
200mV/div
1A/div
0A
100µs/div
V
IN
= 14V
0.5A