Typical operating characteristics (continued) – Rainbow Electronics MAX15051 User Manual
Page 6
MAX15050/MAX15051
High-Efficiency, 4A, 1MHz, Step-Down Regulators
with Integrated Switches in 2mm x 2mm Package
6
_______________________________________________________________________________________
Typical Operating Characteristics (continued)
(V
IN
= 5V, output voltage = 1.8V, I
LOAD
= 4A, and T
A
= +25°C, circuit of Figure 1, unless otherwise noted.)
SOFT-START WAVEFORM
MAX15050 toc10
V
EN
5V/div
V
OUT
1V/div
400µs/div
INPUT SHUTDOWN CURRENT
vs. INPUT VOLTAGE
MAX15050 toc11
INPUT VOLTAGE (V)
INPUT SHUTDOWN CURRENT (µA)
80
65
-25 -10
5
35
20
50
2
4
6
8
10
12
0
-40
V
IN
= 3.3V
V
IN
= 5V
MAX15050 toc12
I
OUT
5A/div
V
OUT
1V/div
HICCUP CURRENT LIMIT
I
IN
2A/div
400µs/div
RMS INPUT CURRENT DURING SHORT
CIRCUIT vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
RMS INPUT CURRENT (A)
5.3
5.1
4.7 4.9
3.5 3.7 3.9 4.1 4.3 4.5
3.1 3.3
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0
2.9
5.5
M
AX15050 toc13
V
OUT
= 0V
FEEDBACK VOLTAGE vs. TEMPERATURE
MAX15050 toc14
TEMPERATURE (°C)
FEEDBACK VOLTAGE (V)
60
35
10
-15
0.596
0.598
0.600
0.602
0.604
0.606
0.594
-40
85
SOFT-START WITH REFIN/SS
MAX15050 toc15
I
IN
1A/div
V
REFIN/SS
500mV/div
V
OUT
1V/div
V
PWRGD
2V/div
400µs/div
STARTING INTO PREBIASED
OUTPUT WITH 2A LOAD
MAX15050 toc16
V
EN
2V/div
V
OUT
1V/div
0V
0V
0A
0V
I
OUT
2A/div
V
PWRGD
5V/div
400µs/div
STARTING INTO PREBIASED
OUTPUT WITH NO LOAD
MAX15050 toc17
V
EN
2V/div
V
OUT
1V/div
V
PWRGD
2V/div
400µs/div
0V
0V
0V