Typical operating characteristics (continued) – Rainbow Electronics MAX15051 User Manual
Page 5
MAX15050/MAX15051
High-Efficiency, 4A, 1MHz, Step-Down Regulators
with Integrated Switches in 2mm x 2mm Package
_______________________________________________________________________________________
5
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.)
FREQUENCY vs. INPUT VOLTAGE
INPUT VOLTAGE (V)
FREQUENCY (MHz)
5.3
5.1
3.1 3.3 3.5
3.9 4.1 4.3 4.5 4.7
3.7
4.9
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
0.80
2.9
5.5
M
AX15050
toc03
T
A
= +25NC
T
A
= -40NC
T
A
= +85NC
40
60
50
80
70
90
100
0.1
1
10
EFFICIENCY vs. LOAD CURRENT
V
IN
= 3.3V (MAX15051)
MAX15050 toc02b
LOAD CURRENT (A)
EFFICIENCY (%)
V
OUT
= 2.5V
V
OUT
= 1.8V
V
OUT
= 1.2V
LINE REGULATION
(I
LOAD
= 4A)
MAX15050 toc04
INPUT VOLTAGE (V)
% OUTPUT FROM NORMAL
5.3
5.1
4.7 4.9
3.5 3.7 3.9 4.1 4.3 4.5
3.1 3.3
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0
2.9
5.5
LOAD REGULATION
MAX15050 toc05
LOAD CURRENT (A)
% OUTPUT FROM NORMAL
3.0
3.5
2.5
2.0
1.5
1.0
0.5
0
4.0
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0
LOAD-TRANSIENT RESPONSE
MAX15050 toc06
V
OUT
AC-COUPLED
200mV/div
I
OUT
2A/div
4A
1A
40µs/div
LOAD-TRANSIENT RESPONSE
MAX15050 toc07
V
OUT
AC-COUPLED
100mV/div
I
OUT
2A/div
2A
4A
40µs/div
SWITCHING WAVEFORMS
MAX15050 toc08
V
OUT
AC-COUPLED
50mV/div
I
LX
1A/div
V
LX
2V/div
0V
400ns/div
SHUTDOWN WAVEFORM
MAX15050 toc09
V
EN
5V/div
V
OUT
1V/div
10µs/div