Typical operating characteristics (continued) – Rainbow Electronics MAX1791 User Manual
Page 7
MAX1762/MAX1791
High-Efficiency, 10-Pin µMAX, Step-Down
Controllers for Notebooks
_______________________________________________________________________________________
7
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
LOAD-TRANSIENT RESPONSE
MAX1762/91 toc12
V
OUT
AC-COUPLED
100mV/div
I
L
2A/div
100
µs/div
V
VP
= 12V, I
L
= 0 TO 2A, V
OUT
= 2.5V
LOAD-TRANSIENT RESPONSE
MAX1762/91 toc13
V
OUT
AC-COUPLED
100mV/div
I
LOAD
2A/div
100
µs/div
V
VP
= 12V, I
LOAD
= 0 TO 2A, V
OUT
= 1.8V
LINE-TRANSIENT RESPONSE
MAX1762/91 toc11
VP
1V/div
7V
V
OUT
AC-COUPLED
20mV/div
100
µs/div
V
VP
= 7.5V TO 8V, I
LOAD
= 0, V
OUT
= 2.5V
SHUTDOWN AND STARTUP WAVEFORMS
(I
L
= 300mA)
MAX1762/91 toc15
V
OUT
2V/div
I
LX
1A/div
SHDN
5V/div
2ms/div
V
VP
= 8V, I
LOAD
= 300mA, V
OUT
= 2.5V
SHUTDOWN AND STARTUP WAVEFORMS
(I
L
= 2.5A)
MAX1762/91 toc16
I
LX
2A/div
SHDN
5V/div
V
OUT
2V/div
2ms/div
V
VP
= 8V, I
LOAD
= 2.5A, V
OUT
= 2.5V
OUTPUT OVERLOAD WAVEFORMS
MAX1762/91 toc14
100
µs/div
V
VP
= 12V, I
LOAD
= 0 TO 3A, V
OUT
= 2.5V
V
OUT
AC-COUPLED
I
LOAD
2A/div
4.0
4.6
4.4
4.2
4.8
5.0
5.2
5.4
5.6
5.8
6.0
5
11
8
14
17
SUPPLY CURRENT vs. INPUT VOLTAGE
(SHUTDOWN)
MAX1762/91 toc10
VP (V)
SUPPLY CURRENT (µA)
NO LOAD
0
100
50
200
150
250
300
5
11
8
14
17
SUPPLY CURRENT vs. INPUT VOLTAGE
MAX1762/91 toc09
VP (V)
SUPPLY CURRENT (
µ
A)
V
OUT
= 3.3V
NO LOAD