Rainbow Electronics MAX1745 - Manual (Page 6)

MAX1744/MAX1745
High-Voltage, Step-Down DC-DC
Controller in µMAX
6 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(Circuit of Figure 1, T A = +25°C, unless otherwise specified.)
REFERENCE OUTPUT VOLTAGE CHANGE
vs. TEMPERATURE
MAX1744/5toc10
TEMPERATURE ( °C)
REFERENCE OUTPUT VOLTAGE CHANGE (%)
100 75 25 50 0 -25
-4
-3
-2
-1
0
1
2
3
4
5
-5
-50 125
V OUT
2V/div
SHUTDOWN
PULSE
5V/div
MAX1744
ENTERING/EXITING SHUTDOWN
MAX1744/5toc11
2ms/div
R L = 3.3 Ω
V
IN
= 7.2V, V
OUT
= 3.3V, LOAD CURRENT = 0.1A TO 2A
A: V OUT , 50mV/div, 3.3V AC-COUPLED
B: LOAD CURRENT, 1A/div
LOAD-TRANSIENT RESPONSE
MAX1744/5toc12
A
B
50 µs/div
V OUT = 5V, LOAD CURRENT = 1A
A: V OUT , 100mV/div, AC-COUPLED
B: V
IN
, 6V TO 12V, 5V/div
LINE-TRANSIENT RESPONSE
MAX1744/5toc13
A
B
4ms/div