Typical operating characteristics (continued) – Rainbow Electronics MAX15038 User Manual
Page 7
MAX15038
4A, 2MHz Step-Down Regulator
with Integrated Switches
_______________________________________________________________________________________
7
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.)
HICCUP CURRENT LIMIT
MAX15038 toc13
400
µs/div
1V/div
5A/div
1A/div
0V
0A
0A
V
OUT
I
OUT
I
IN
RMS INPUT CURRENT DURING
SHORT CIRCUIT vs. INPUT VOLTAGE
MAX15038 toc14
INPUT VOLTAGE (V)
RMS INPUT CURRENT (A)
5.0
4.5
4.0
3.5
3.0
0.1
0.2
0.3
0.4
0.5
0
2.5
5.5
V
OUT
= 0V
EXPOSED PAD TEMPERATURE
vs. AMBIENT TEMPERATURE
MAX15038 toc15
AMBIENT TEMPERATURE (
°C)
EXPOSED PAD TEMPERATURE (
°C)
80
60
40
20
10
20
30
40
50
60
70
80
90
100
0
0
100
MEASURED ON A MAX15038EVKIT
4A LOAD
FEEDBACK VOLTAGE
vs. TEMPERATURE
MAX15038 toc16
TEMPERATURE (
°C)
FEEDBACK VOLTAGE (V)
60
35
-15
10
0.57
0.58
0.59
0.60
0.62
0.61
0.63
0.64
0.56
-40
85
SOFT-START WITH REFIN
MAX15038 toc17
200
µs/div
1A/div
0.5V/div
2V/div
0A
1V/div
0V
0V
0V
I
IN
V
PWRGD
V
REFIN
V
OUT
STARTING INTO PREBIASED OUTPUT
(MODE = V
DD
, V
OUT
= 2.5V, 2A LOAD)
MAX15038 toc18
200
µs/div
5V/div
1V/div
5V/div
0V
2A
0A
0V
0V
V
EN
V
PWRGD
V
OUT
I
OUT
STARTING INTO PREBIASED OUTPUT
(MODE = V
DD
/2, V
OUT
= 2.5V, 2A LOAD)
MAX15038 toc19
200
µs/div
5V/div
1V/div
5V/div
0V
2A
0A
0V
0V
V
EN
V
PWRGD
V
OUT
I
OUT