MAX15038 Datasheet, PDF (7/18 Pages) Maxim Integrated Products – 4A, 2MHz Step-Down Regulator with Integrated Switches

4A, 2MHz Step-Down Regulator
with Integrated Switches
Typical Operating Characteristics (continued)
(Typical values are V_IN = V_EN = 5V, V_OUT = 1.8V, R_FREQ = 49.9kΩ, I_OUT = 4A, T_A = +25°C, circuit of Figure 1, unless otherwise noted.)
HICCUP CURRENT LIMIT
MAX15038 toc13
VOUT
1V/div
0V
IOUT
5A/div
0A
IIN
1A/div
0A
400µs/div
RMS INPUT CURRENT DURING
SHORT CIRCUIT vs. INPUT VOLTAGE
0.5
0.4
0.3
0.2
0.1
VOUT = 0V
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
100
90
80
70
60
50
40
30
20
10
0
0
EXPOSED PAD TEMPERATURE
vs. AMBIENT TEMPERATURE
4A LOAD
MEASURED ON A MAX15038EVKIT
20
40
60
80
100
AMBIENT TEMPERATURE (°C)
FEEDBACK VOLTAGE
vs. TEMPERATURE
0.64
SOFT-START WITH REFIN
MAX15038 toc17
0.63
IIN
1A/div
0.62
0A
0.61
VREFIN
0.5V/div
0.60
0V
0.59
1V/div
VOUT
0.58
0V
0.57
0.56
-40 -15
10
35
60
85
TEMPERATURE (°C)
VPWRGD
200µs/div
2V/div
0V
STARTING INTO PREBIASED OUTPUT
(MODE = VDD, VOUT = 2.5V, 2A LOAD)
MAX15038 toc18
VEN
5V/div
0V
1V/div
VOUT
0V
2A
IOUT
0A
VPWRGD
200µs/div
5V/div
0V
STARTING INTO PREBIASED OUTPUT
(MODE = VDD/2, VOUT = 2.5V, 2A LOAD)
MAX15038 toc19
VEN
5V/div
0V
1V/div
VOUT
0V
2A
IOUT
0A
VPWRGD
200µs/div
5V/div
0V
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