MAX15002 Datasheet, PDF (6/30 Pages) Maxim Integrated Products – Dual-Output Buck Controller with Tracking/Sequencing

Dual-Output Buck Controller with
Tracking/Sequencing
Typical Operating Characteristics (continued)
(V_IN = 12V, referenced to Figure 8, T_A = T_J = +25°C, unless otherwise noted.)
VALLEY CURRENT-LIMIT THRESHOLD
vs. TEMPERATURE
100
RILIMc = 25.5kΩ
90
80
70
60
50
40
30
TEMP COEFFICIENT (nom.) = 3,333ppm/°C
20
-50 -25 0 25 50 75 100 125 150
TEMPERATURE (°C)
15
14
13
12
11
10
9
8
7
6
5
200
SWITCHING CURRENT
vs. FREQUENCY
VIN
VIN = 12V
DL_, DH_
UNCONNECTED
VFB_ = 0V
700
1200
1700
2200
FREQUENCY (kHz)
VOUT1, 2
RATIOMETRIC STARTUP
MAX15002 toc11
10V/div
0V
1V/div
1V/div
0V
VEN2 = 0V, SEL = REG
2ms/div
VOUT2
RATIOMETRIC SHUTDOWN
MAX15002 toc12
CHANNEL 2 SHORT CIRCUIT
(RATIOMETRIC MODE)
MAX15002 toc13
CHANNEL 1 SHORT CIRCUIT
(RATIOMETRIC MODE)
MAX15002 toc14
VIN
10V/div VIN
10V/div
VOUT1
500mV/div _VOUT2
0V
VOUT1
1V/div
0V
0V
2V/div
0V
VEN2 = 0V, SEL = REG
1ms/div
500mV/div _VOUT1
0V
VEN2 = 0V, SEL = REG
1ms/div
VOUT2
2V/div
0V
VEN2 = 0V, SEL = REG
1ms/div
1V/div
0V
VIN
VOUT1, 2
COINCIDENT STARTUP
MAX15002 toc15
10V/div
0V
1V/div
1V/div
0V
CIRCUIT OF FIGURE 8, SEL = REG
2ms/div
VOUT1
VOUT2
COINCIDENT SHUTDOWN
MAX15002 toc16
500mV/div
2ms/div
500mV/div
0V
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