Datasheet

High-Voltage, 2.2MHz, 2A Automotive Step-
Down Converter with Low Operating Current
MAX16974
_______________________________________________________________________________________ 5
Typical Operating Characteristics (continued)
(V
SUP
= V
SUPSW
= 14V, V
OUT
= 5V, FSYNC = GND, f
OSC
= 400kHz, T
A
= +25NC, unless otherwise noted. See Figure 1.)
LOAD TRANSIENT
MAX16974 toc06
0V
1A/div
200mV/div
0A
V
OUT
I
LOAD
SF = 400kHz
V
OUT
AC-
COUPLED
UNDERVOLTAGE PULSE
MAX16974 toc07
0V
0V
5V/div
5V/div
5V/div
0V
V
SUP
V
OUT
20ms/div
V
RES
SF = 2.2MHz
RESET TIMEOUT PERIOD vs. C
RES
MAX16974 toc08
C
RES
(µF)
RESET TIMEOUT PERIOD (ms)
0.90.80.6 0.70.2 0.3 0.4 0.50.1
10
20
30
40
50
60
70
80
90
100
0
0 1.0
SWITCHING FREQUENCY
vs. TEMPERATURE
MAX16974 toc09
TEMPERATURE (°C)
SWITCHING FREQUENCY (kHz)
1109565 80-10 5 20 35 50-25
410
420
430
440
450
460
470
480
490
500
400
-40 125
V
OUT
= 5V
LOAD DUMP TEST (5V/2.2MHz)
MAX16974 toc10
0
0
20V/div
5V/div
5V/div
0
V
SUP
V
OUT
100ms/div
V
RES
SHORT-CIRCUIT RESPONSE
MAX16974 toc11
0A
0V
5A/div
5V/div
5V/div
0V
I
LX
V
OUT
2ms/div
2.2MHz
V
RES