Datasheet

LT3973/LT3973-3.3/LT3973-5
8
3973fa
Switching Waveforms,
Burst Mode Operation
Switching Waveforms, Full
Frequency Continuous Operation
Power Good Threshold
EN/UVLO Threshold
Catch Diode Leakage
Transient Load Response; Load
Current is Stepped from 50mA
(Burst Mode Operation) to 300mA
Transient Load Response; Load
Current is Stepped from 250mA
to 500mA
Typical perFormance characTerisTics
T
A
= 25°C, unless otherwise noted.
TEMPERATURE (°C)
–50
CATCH DIODE LEAKAGE (µA)
150
200
250
25 75 150
3973 G28
100
50
0
–25 0
50
100 125
V
R
= 12V
TEMPERATURE (°C)
–50
88
THRESHOLD (%)
89
90
91
92
–25 0 25 50
3973 G29
75 100 125 150
TEMPERATURE (°C)
–50
1.145
THRESHOLD VOLTAGE (V)
1.170
1.195
1.220
1.245
–25 0 25 50
3973 G30
75 100 125 150
EN/UVLO RISING
V
OUT
100mV/DIV
I
L
200mA/DIV
50µs/DIV
FRONT PAGE APPLICATION
V
IN
= 12V
V
OUT
= 5V
3973 G31
V
OUT
100mV/DIV
I
L
200mA/DIV
50µs/DIV
FRONT PAGE APPLICATION
V
IN
= 12V
V
OUT
= 5V
3973 G32
V
OUT
10mV/DIV
V
SW
5V/DIV
I
L
200mA/DIV
5µs/DIV
FRONT PAGE APPLICATION
V
IN
= 12V
V
OUT
= 5V
I
LOAD
= 15mA
f = 600kHz
3973 G33
V
OUT
5mV/DIV
V
SW
5V/DIV
I
L
200mA/DIV
1µs/DIV
FRONT PAGE APPLICATION
V
IN
= 12V
V
OUT
= 5V
I
LOAD
= 750mA
f = 600kHz
3973 G34