Typical operating characteristics (continued) – Rainbow Electronics MAX8649 User Manual
Page 8
MAX8649
1.8A Step-Down Regulator with Differential
Remote Sense in 2mm x 2mm WLP
8
_______________________________________________________________________________________
LIGHT LOAD STARTUP WAVEFORMS
MAX8649 toc17
100mA/div
500mA/div
1V/div
5V/div
V
OUT
I
IN
I
L
V
EN
200μs/div
10
I LOAD
HEAVY LOAD STARTUP WAVEFORMS
MAX8649 toc18
200mA/div
500mA/div
1V/div
5V/div
V
OUT
I
IN
I
L
V
EN
200μs/div
1
I LOAD
PREBIAS STARTUP WAVEFORMS
(FORCED PWM)
MAX8649 toc19
500mV/div
1A/div
5V/div
V
OUT
I
L
V
EN
200μs/div
OUTPUT PREBIASED TO 1.3V
STARTUP TO 1.1V
LINE TRANSIENT RESPONSE (4.2V TO
3.2V TO 4.2V) SYNC OFF
MAX8649 toc20
1V/div
20mV/div
200mA/div
V
OUT
I
L
20μs/div
300mA LOAD
V
IN
LINE TRANSIENT RESPONSE (4.2V TO
3.2V TO 4.2V) 26MHz SYNC
MAX8649 toc21
1V/div
20mV/div
200mA/div
V
OUT
I
L
20μs/div
300mA LOAD
V
IN
LOAD TRANSIENT RESPONSE
(1mA TO 1A)
MAX8649 toc22
50mV/div
500mA/div
1A/div
V
OUT
I
OUT
I
L
40μs/div
Typical Operating Characteristics (continued)
(
Typical Operating Circuit, V
IN1
= V
IN2
= 3.6V, V
AGND
= V
PGND
= 0V, V
OUT
= 1.1V, V
DD
= 1.8V, T
A
= +25°C, unless otherwise noted.)