User Manual

MAX5082/MAX5083
1.5A, 40V, MAXPower Step-Down
DC-DC Converters
_______________________________________________________________________________________ 5
Typical Operating Characteristics (continued)
(V
IN
= 12V, see Figure 5 (MAX5082) and Figure 6 (MAX5083), T
A
= +25°C, unless otherwise noted.)
MAXIMUM DUTY CYCLE
vs. INPUT VOLTAGE (MAX5083)
MAX5080 toc08b
INPUT VOLTAGE (V)
MAXIMUM DUTY CYCLE (%)
353020 2510 155
82
84
86
88
90
92
94
96
98
100
80
040
OPEN-LOOP GAIN/PHASE vs. FREQUENCY
MAX5082 toc10
FREQUENCY (kHz)
GAIN (dB)
PHASE (DEGREES)
10001001010.10.010.001
0
20
40
60
80
100
-20
75
100
125
150
175
50
0 10,000
GAIN
PHASE
OUTPUT CURRENT LIMIT
vs. INPUT VOLTAGE
MAX5082/3 toc10
INPUT VOLTAGE (V)
OUTPUT CURRENT LIMIT (A)
353020 2510 155
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
2.0
040
MAX5082
T
A
= +135°C
T
A
= +25°C
T
A
= +85°C
T
A
= -40°C
OUTPUT IS
PULSED WITH 3% DUTY CYCLE
TURN-ON/OFF WAVEFORM
MAX5082/3 toc11a
V
OUT
2V/div
2ms/div
I
LOAD
= 1A
V
ON/OFF
2V/div
TURN-ON/OFF WAVEFORM
MAX5082/3 toc11b
V
ON/OFF
2V/div
V
OUT
2V/div
2ms/div
I
LOAD
= 100mA
OUTPUT VOLTAGE vs. TEMPERATURE
MAX5082/3 toc12
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
1108535 6010-15
3.22
3.24
3.26
3.28
3.30
3.32
3.34
3.36
3.38
3.40
3.20
-40 135
MAX5082
I
LOAD
= 0A
I
LOAD
= 1A
EFFICIENCY vs. LOAD CURRENT
MAX5082/3 toc13a
LOAD CURRENT (A)
EFFICIENCY (%)
0.10.01
20
30
40
50
60
70
80
90
100
0
0.001 101
V
IN
= 40V,
V
OUT
= 3.3V
MAX5082
V
IN
= 24V,
V
OUT
= 3.3V
V
IN
= 12V,
V
OUT
= 3.3V
V
IN
= 7.5V,
V
OUT
= 3.3V
V
IN
= 4.5V,
V
OUT
= 3.3V