Typical operating characteristics (continued) – Rainbow Electronics MAX15020 User Manual
Page 5
MAX15020
2A, 40V Step-Down DC-DC Converter with
Dynamic Output-Voltage Programming
_______________________________________________________________________________________
5
TURN-ON/TURN-OFF WAVEFORM
MAX15020 toc10
10ms/div
5V/div
0V
1V/div
0V
V
OUT
V
ON/OFF
V
IN
= 40V, R
LOAD
= 27
Ω
REFOUT VOLTAGE vs. TEMPERATURE
MAX15020 toc11
TEMPERATURE (
°C)
REFOUT VOLTAGE (V)
110
85
60
35
10
-15
0.97
0.99
1.01
1.03
1.05
0.95
-40
135
EFFICIENCY vs. LOAD CURRENT
MAX15020 toc12
OUTPUT CURRENT (A)
EFFICIENCY (%)
1
0.1
10
20
30
40
50
60
70
80
90
100
0
0.01
10
V
IN
= 40V
V
IN
= 24V
f
S
= 500kHz
V
OUT
= 3.3V
V
IN
= 12V
V
IN
= 7.5V
EFFICIENCY vs. LOAD CURRENT
MAX15020 toc13
OUTPUT CURRENT (A)
EFFICIENCY (%)
1
0.1
10
20
30
40
50
60
70
80
90
100
0
0.01
10
f
S
= 500kHz
V
IN
= 40V
V
OUT
= 30V
TURN-ON/TURN-OFF WAVEFORM
MAX15020 toc09
10ms/div
5V/div
0V
1V/div
0V
V
OUT
V
ON/OFF
V
IN
= 12V, R
LOAD
= 27
Ω
Typical Operating Characteristics (continued)
(V
IN
= 36V, Circuit of Figure 2, T
A
= +25°C, unless otherwise noted.)
LOAD TRANSIENT
MAX15020 toc14
200
µs/div
50mV/div
AC-COUPLED
2A
1A
I
OUT
V
OUT
V
IN
= 12V, V
OUT
= 3.3V
LOAD TRANSIENT
MAX15020 toc15
200
µs/div
50mV/div
AC-COUPLED
1.2A
0.2A
V
OUT
I
OUT
V
IN
= 12V, V
OUT
= 3.3V