Typical operating characteristics (continued) – Rainbow Electronics MAX15058 User Manual
Page 7
High-Efficiency, 3A, Current-Mode
Synchronous, Step-Down Switching Regulator
MAX15058
_______________________________________________________________________________________ 7
Typical Operating Characteristics (continued)
(V
IN
= 5V, V
OUT
= 1.8V, I
LOAD
= 3A, Circuit of Figure 5, T
A
= +25NC, unless otherwise noted.)
STARTING INTO A PREBIASED OUTPUT
(I
OUT
= 2A)
MAX15058 toc19
V
ENABLE
5V/div
V
OUT
1V/div
V
PGOOD
5V/div
I
LX
1A/div
200
µs/div
PWM MODE
STARTING INTO A PREBIASED OUTPUT
HIGHER THAN SET OUTPUT
MAX15058 toc21
V
OUT
500mV/div
V
SS/REFIN
500mV/div
I
L
1A/div
400
µs/div
1.8V
10I LOAD AT OUT
STARTING INTO A PREBIASED OUTPUT
(NO LOAD)
MAX15058 toc20b
V
ENABLE
5V/div
V
OUT
1V/div
V
PGOOD
5V/div
I
LX
1A/div
200
µs/div
SKIP MODE
STARTING INTO A PREBIASED OUTPUT
(NO LOAD)
MAX15058 toc20a
V
ENABLE
5V/div
V
OUT
1V/div
V
PGOOD
5V/div
I
LX
1A/div
200
µs/div
PWM MODE
SOFT-START WAVEFORMS
(EXTERNAL REFIN) (SKIP MODE)
MAX15058 toc18b
V
SS/REFIN
500mV/div
V
OUT
1V/div
V
PGOOD
5V/div
I
LX
1A/div
200
µs/div
NO LOAD
SOFT-START WAVEFORMS
(EXTERNAL REFIN) (PWM MODE)
MAX15058 toc18a
V
SS/REFIN
500mV/div
V
OUT
1V/div
V
PGOOD
5V/div
I
LX
1A/div
200
µs/div
NO LOAD