MAX15004_11 Datasheet, PDF (7/27 Pages) Maxim Integrated Products – 4.5V to 40V Input Automotive Flyback/Boost/SEPIC Power-Supply Controllers

4.5V to 40V Input Automotive
Flyback/Boost/SEPIC Power-Supply Controllers
Typical Operating Characteristics (continued)
(VIN = 14V, CIN = 0.1μF, CVCC = 0.1μF // 1μF, CREG5 = 1μF, VON/_OFF = 5V, CSS = 0.01μF, CSLOPE = 100pF, RT = 13.7kΩ,
CT = 560pF. TA = +25°C, unless otherwise noted.)
MAX15005 MAXIMUM DUTY CYCLE
vs. OUTPUT FREQUENCY (f_OUT)
100
CT = 100pF
95
90
85
80
75 ^{CT = 3300pF}
70 _{CT = 2200pF}
65
CT = 1500pF
60
55
CT = 1000pF ^{CT = 560pF}
CT = 220pF
50
10
100
1000
OUTPUT FREQUENCY (kHz)
MAXIMUM DUTY CYCLE
vs. f_SYNC/f_OSC RATIO
80 _MAX15005
75
70
CT = 560pF
RT = 10kΩ
f_OSC = f_OUT = 180kHz
65
60
C_RTCT = 220pF
R_RTCT = 10kΩ
f_OSC = f_OUT = 418kHz
55
50
1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0
f_SYNC/f_OSC RATIO
MAX15004 MAXIMUM DUTY CYCLE
vs. TEMPERATURE
55
54 ^{fOUT = 75kHz}
53
52
51
50
49
48
47
46
45
-40 -15 10 35 60 85 110 135
TEMPERATURE (°C)
ERROR AMPLIFIER OPEN-LOOP GAIN
AND PHASE vs. FREQUENCY
110
MAX15004 toc14
100
340
90
GAIN
300
80
70
260
60
50
220
40
180
30
20
PHASE
140
10
100
0
-10
60
0.1 1 10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
OVI TO OUT DELAY THROUGH
OVERVOLTAGE COMPARATOR
MAX15004 toc16
V_OUT
V_OUT
V_OVI ^2V/div
DRIVER OUTPUT PEAK SOURCE
AND SINK CURRENT
MAX15004 toc17
C_OUT = 10nF
V_OUT
5V/div
V_OVI
500mV/div
I_OUT
1A/div
MAX15005 MAXIMUM DUTY CYCLE
vs. TEMPERATURE
85
CT = 560pF
83 _{RT = 13.7kΩ}
81 ^fOSC ^{= f}OUT ^{= 150kHz}
79
77
75
73
71
69
67
65
-40 -15 10 35 60 85 110 135
TEMPERATURE (°C)
CS-TO-OUT DELAY vs. TEMPERATURE
100
MAX15004 toc15
90
V_CS OVERDRIVE = 50mV
80
70
60
50
V_CS OVERDRIVE = 190mV
40
30
20
10
0
-40 -15
10 35 60 85
TEMPERATURE (°C)
110 135
POWER-UP SEQUENCE THROUGH V_IN
MAX15004 toc18
V_ON/OFF = 5V
V_IN
10V/div
V_CC
5V/div
REG5
5V/div
VOUT
5V/div
1μs/div
400ns/div
2ms/div
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