User guide

MAX15020
2A, 40V Step-Down DC-DC Converter with
Dynamic Output-Voltage Programming
4 _______________________________________________________________________________________
Typical Operating Characteristics
(V
IN
= 36V, Circuit of Figure 2, T
A
= +25°C, unless otherwise noted.)
UNDERVOLTAGE LOCKOUT HYSTERESIS
vs. TEMPERATURE
MAX15020 toc01
TEMPERATURE (°C)
UNDERVOLTAGE LOCKOUT HYSTERESIS
1108535 6010-15
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0
-40 135
ON/OFF THRESHOLD HYSTERESIS
vs. TEMPERATURE
MAX15020 toc02
TEMPERATURE (°C)
ON/OFF THRESHOLD HYSTERESIS (V)
1108535 6010-15
0.05
0.10
0.15
0.20
0
-40 135
SHUTDOWN SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX15020 toc03
INPUT VOLTAGE (V)
SUPPLY CURRENT (µA)
302010
1
2
3
4
5
6
7
0
040
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX15020 toc04
INPUT VOLTAGE (V)
SUPPLY CURRENT (mA)
302010
2
4
8
6
10
12
14
16
0
040
OPERATING FREQUENCY
vs. TEMPERATURE
MAX15020 toc05
TEMPERATURE (°C)
OPERATING FREQUENCY (kHz)
1108535 6010-15
290
292
294
296
298
300
302
304
306
308
288
-40 135
MAXIMUM DUTY CYCLE
vs. INPUT VOLTAGE
MAX15020 toc06
INPUT VOLTAGE (V)
DUTY CYCLE (%)
302010
86
88
82
84
90
92
94
96
98
100
80
040
LOOP GAIN/PHASE
vs. FREQUENCY
MAX15020 toc07
FREQUENCY (kHz)
GAIN (dB)
PHASE (DEGREES)
100101
-40
-30
-20
-10
0
10
20
30
40
50
-50
-144
-108
-72
-36
0
36
72
108
144
180
-180
0.1 1000
PHASE
V
IN
= 37V, V
OUT
= 15V,
I
OUT
= 2.02A
GAIN
MAXIMUM LOAD CURRENT
vs. INPUT VOLTAGE
MAX15020 toc08
INPUT VOLTAGE (V)
LOAD CURRENT (A)
353020 2510 155
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
2.5
040
T
A
= -45°C
T
A
= +25°C
T
A
= +85°C