MAX6397/MAX6398
Overvoltage Protection Switch/Limiter
Controllers Operate Up to 72V
_______________________________________________________________________________________
5
16.0
16.3
16.2
16.1
16.5
16.4
16.9
16.8
16.7
16.6
17.0
-50 -25 0 25 50 75 100 125
GATE-TO-OUT CLAMP VOLTAGE
vs. TEMPERATURE
MAX6397-98 toc10
TEMPERATURE (
°
C)
GATE-TO-OUT CLAMP VOLTAGE (V)
0
0.4
0.2
0.8
0.6
1.2
1.0
1.4
1.8
1.6
2.0
0 40608020 100 120 140 160 180
DROPOUT VOLTAGE
vs. REG LOAD CURRENT
MAX6397-98 toc11
REG LOAD CURRENT (mA)
DROPOUT VOLTAGE (V)
MAX6397L
T
A
= +125°C
T
A
= +25°C
T
A
= -40°C
4.90
5.00
4.95
5.10
5.05
5.15
5.20
-40 -10 5 20-25 3550658095110125
REG OUTPUT VOLTAGE
vs. LOAD CURRENT AND TEMPERATURE
MAX6397-98 toc12
TEMPERATURE (
°
C)
REG OUTPUT VOLTAGE (V)
I
LOAD
= 100mA
I
LOAD
= 10mA
I
LOAD
= 50mA
MAX6397L
4.0
4.6
4.4
4.2
4.8
5.0
5.2
0 16012040 80 200 240 280 320 360 400
MAXIMUM REG OUTPUT VOLTAGE
vs. LOAD CURRENT AND TEMPERATURE
MAX6397-98 toc13
LOAD CURRENT (mA)
REG OUTPUT VOLTAGE (V)
THERMAL
SHUTDOWN
T
A
= +25°C
T
A
= +125°C
T
A
= -40°C
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX6397-98 toc15
FREQUENCY (Hz)
PSRR (dB)
1M100k10k1k100
-60
-50
-40
-30
-20
-10
0
-70
10 10M
C
REG
= 10µF
I
REG
= 10mA
4ms/div
STARTUP WAVEFORM
(R
LOAD
= 100Ω, C
IN
= 10µF, C
OUT
= 10µF)
V
IN
10V/div
MAX6397-98 toc16
V
GATE
10V/div
V
OUT
10V/div
I
OUT
200mA/div
400µs/div
STARTUP WAVEFORM FROM SHUTDOWN
(C
IN
= 10µF, C
OUT
= 10µF)
V
SHDN
2V/div
MAX6397-98 toc17
V
GATE
10V/div
V
OUT
10V/div
I
OUT
200mA/div
R
LOAD
= 100Ω
Typical Operating Characteristics (continued)
(V
IN
= 14V, C
REG
= 4.7µF, I
REG
= 0, unless otherwise noted.)
GATE-DRIVE VOLTAGE
vs. TEMPERATURE
MAX6397-98 toc14
TEMPERATURE (°C)
GATE-DRIVE VOLTAGE (V)
1007525 500-25
10.455
10.460
10.465
10.470
10.475
10.480
10.485
10.490
10.495
10.500
10.450
-50 125
