Typical operating characteristics (continued) – Rainbow Electronics MAX15038 User Manual
Page 8
MAX15038
4A, 2MHz Step-Down Regulator
with Integrated Switches
8
_______________________________________________________________________________________
Typical Operating Characteristics (continued)
(Typical values are V
IN
= V
EN
= 5V, V
OUT
= 1.8V, R
FREQ
= 49.9k
Ω, I
OUT
= 4A, T
A
= +25°C, circuit of Figure 1, unless otherwise noted.)
STARTING INTO PREBIASED OUTPUT
(MODE = V
DD
, V
OUT
= 2.5V, NO LOAD)
MAX15038 toc20
200
µs/div
V
EN
2V/div
V
OUT
1V/div
V
PWRGD
2V/div
0V
0V
0V
STARTING INTO PREBIASED OUTPUT
(MODE = V
DD
/2, V
OUT
= 2.5V, NO LOAD)
MAX15038 toc21
200
µs/div
V
EN
2V/div
V
OUT
1V/div
V
PWRGD
2V/div
0V
0V
0V
STARTING INTO PREBIASED OUTPUT
ABOVE NOMINAL SETPOINT (V
OUT
= 1.5V)
MAX15038 toc22
1ms/div
V
EN
2V/div
V
OUT
1V/div
V
PWRGD
2V/div
0V
0V
0V
V
MODE
= V
DD
,
NO LOAD
STARTING INTO PREBIASED ABOVE
NOMINAL SETPOINT (V
OUT
= 1.5V)
MAX15038 toc23
1ms/div
V
EN
2V/div
V
OUT
1V/div
V
PWRGD
2V/div
0V
0V
0V
V
MODE
= V
DD
/2,
NO LOAD
TRANSITION FROM SKIP MODE
TO FORCED PWM MODE
MAX15038 toc24
2ms/div
V
MODE
5V/div
V
LX
5V/div
V
OUT
0.5V/div
0V
TRANSITION FROM FORCED PWM
TO SKIP MODE
MAX15038 toc25
4ms/div
V
MODE
5V/div
V
LX
5V/div
V
OUT
0.5V/div
0V