MAX15003 Datasheet, PDF (6/32 Pages) Maxim Integrated Products – Triple-Output Buck Controller with Tracking/Sequencing

Triple-Output Buck Controller with
Tracking/Sequencing
Typical Operating Characteristics (continued)
(Figure 8, V_IN = 12V, C_REG = 2.2µF, T_A = +25°C, unless otherwise noted.)
SWITCHING FREQUENCY ACCURACY
vs. TEMPERATURE
10
8
6
4
2
0
-2
-4
-6
-8
-10
-50 -25
f_SW = 600kHz
0 25 50 75 100 125 150
TEMPERATURE (°C)
VALLEY CURRENT-LIMIT THRESHOLD
vs. V_ILIM
350
300
250
200
150
100
50
500 1000 1500 2000 2500 3000 3500
V_ILIM (mV)
VALLEY CURRENT-LIMIT THRESHOLD
vs. TEMPERATURE
100
90
R_ILIM = 25.5kΩ
80
70
60
50
40
30
20
-50 -25
TEMPERATURE COEFFICIENT
(NOM.) = 3,333ppm/°C
0 25 50 75 100 125 150
TEMPERATURE (°C)
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
200
SWITCHING CURRENT
vs. FREQUENCY
V_IN
V_{OUT1, 2, 3}
700
1200
1700
2200
FREQUENCY (kHz)
RATIOMETRIC STARTUP
MAX15003 toc13
10V/div
V_OUT1
0V
V_OUT2
1V/div
1V/div
V_OUT3
1V/div
V_EN2 = V_EN3 = 0V, SEL = REG
1ms/div
V_{OUT1, 2, 3}
RATIOMETRIC SHUTDOWN
MAX15003 toc14
500mV/div
500mV/div
0V
V_EN2 = V_EN3 = 0V, SEL = REG
400µs/div
V_OUT2
CHANNEL 2 SHORT CIRCUIT
(RATIOMETRIC MODE)
MAX15003 toc15
1V/div
V_OUT1
CHANNEL 1 SHORT CIRCUIT
(RATIOMETRIC MODE)
MAX15003 toc16
1V/div
V_OUT1
V_OUT3
1V/div
0V
V_EN2 = V_EN3 = 0V, SEL = REG
400µs/div
V_OUT2
V_OUT3
0V
1V/div
1V/div
0V
V_EN2 = V_EN3 = 0V, SEL = REG
400µs/div
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