MAX15020_11 Datasheet, PDF (4/18 Pages) Maxim Integrated Products – 2A, 40V Step-Down DC-DC Converter with Dynamic Output-Voltage Programming

2A, 40V Step-Down DC-DC Converter with
Dynamic Output-Voltage Programming
Typical Operating Characteristics
(V_IN = 36V, Circuit of Figure 2, T_A = +25°C, unless otherwise noted.)
UNDERVOLTAGE LOCKOUT HYSTERESIS
vs. TEMPERATURE
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
-40 -15 10 35 60 85 110 135
TEMPERATURE (°C)
ON/OFF THRESHOLD HYSTERESIS
vs. TEMPERATURE
0.20
0.15
0.10
0.05
0
-40 -15
10 35 60 85
TEMPERATURE (°C)
110 135
SHUTDOWN SUPPLY CURRENT
vs. INPUT VOLTAGE
7
6
5
4
3
2
1
0
0
10
20
30
40
INPUT VOLTAGE (V)
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE
16
14
12
10
8
6
4
2
0
0
10
20
30
40
INPUT VOLTAGE (V)
OPERATING FREQUENCY
vs. TEMPERATURE
308
306
304
302
300
298
296
294
292
290
288
-40 -15 10 35 60 85 110 135
TEMPERATURE (°C)
MAXIMUM DUTY CYCLE
vs. INPUT VOLTAGE
100
98
96
94
92
90
88
86
84
82
80
0
10
20
30
40
INPUT VOLTAGE (V)
LOOP GAIN/PHASE
vs. FREQUENCY
50
180 ^{MAX15020 toc07}
40
PHASE
144
30
108
20
72
10
GAIN
36
0
0
-10
-36
-20
-72
-30
-40 ^{VIN = 37V, VOUT = 15V,}
I_OUT = 2.02A
-50
0.1
1
10
100
FREQUENCY (kHz)
-108
-144
-180
1000
MAXIMUM LOAD CURRENT
vs. INPUT VOLTAGE
3.5
3.4
3.3
T_A = -45°C
3.2
3.1
3.0 T_A = +25°C
2.9
2.8
T_A = +85°C
2.7
2.6
2.5
0
5 10 15 20 25 30 35 40
INPUT VOLTAGE (V)
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