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| MAX16909_12 Datasheet, PDF (6/18 Pages) Maxim Integrated Products – 36V, 220kHz to 1MHz Step-Down Converter with Low Operating Current | |||
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MAX16909
36V, 220kHz to 1MHz Step-Down Converter
with Low Operating Current
Typical Operating Characteristics (continued)
(VSUP = VSUPSW = VEN = 14V, VOUT = 1.8V, R1 = 80.6kâ¦, R2 = 100kâ¦, TA = +25NC (Figure 4), unless otherwise noted.)
VOUT
AC-COUPLED
PWM MODE LOAD-TRANSIENT
RESPONSE (1.8V/400kHz)
MAX16909 toc07
VIN = 14V
200mV/div
VOUT
AC-COUPLED
SKIP-MODE LOAD-TRANSIENT
RESPONSE (1.8V/400kHz)
MAX16909 toc08
VIN = 14V
50mV/div
ILOAD
0.5A
100µs/div
1A/div
0A
ILOAD
100µs/div
10mA/div
0A
FSYNC TRANSITION FROM INTERNAL
TO EXTERNAL FREQUENCY (1.8V/400kHz)
MAX16909 toc09
fFSYNC = 440kHz
VFSNC
VLX
5V/div
0V
10V/div
0V
2µs/div
LOAD DUMP TEST (1.8V/400kHz)
MAX16909 toc11
42V
VIN
14V
VOUT
10ms/div
10V/div
0V
2V/div
0V
UNDERVOLTAGE PULSE (1.8V/400kHz)
MAX16909 toc10
VSUPSW
VOUT
VLX
ILOAD
5V/div
SUP = 5V
RESISITIVE LOAD = 0.6I
0V
2V/div
0V
20V/div
0V
20ms/div
5A/div
0A
OUTPUT RESPONSE TO SLOW INPUT
(ILOAD = 3A)
MAX16909 toc12
VIN
VOUT
VLX
VPGOOD
1.8V/400kHz
0.6I RESISTIVE LOAD
2s/div
10V/div
0V
2V/div
0V
10V/div
0V
5V/div
0V
Maxim Integrated
ââ6
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