Datasheet

LT8614
6
For more information www.analog.com
TYPICAL PERFORMANCE CHARACTERISTICS
Dropout Voltage Switching Frequency Burst Frequency
Frequency Foldback
Minimum Load to Full Frequency
(SYNC DC High) Soft-Start Tracking
Soft-Start Current
PG High Thresholds
PG Low Thresholds
LOAD CURRENT (A)
0
DROPOUT VOLTAGE (mV)
400
600
4
8614 G19
200
0
1
2
3
0.5
1.5
2.5
3.5
800
300
500
100
700
TEMPERATURE (°C)
–50
SWITCHING FREQUENCY (kHz)
730
25
8614 G20
700
680
–25 0 50
670
660
740
R
T
= 60.4k
720
710
690
75 100 150125
LOAD CURRENT (mA)
0
0
SWITCHING FREQUENCY (kHz)
200
400
600
800
1000
1200
50 100 150 200
8614 G21
FRONT PAGE APPLICATION
V
IN
= 12V
V
OUT
= 5V
INPUT VOLTAGE (V)
5
LOAD CURRENT (mA)
60
80
100
20 30 45
8614 G22
40
20
0
10 15
25
35 40
FRONT PAGE APPLICATION
V
OUT
= 5V
f
SW
= 1MHz
FB VOLTAGE (V)
0
SWITCHING FREQUENCY (kHz)
300
400
500
0.6
1
8614 G23
200
100
0
0.2 0.4 0.8
600
700
800
V
OUT
= 3.3V
V
IN
= 12V
V
SYNC
= 0V
R
T
= 60.4k
TR/SS VOLTAGE (V)
0
FB VOLTAGE (V)
0.8
1.0
1.2
0.6 1.0
8614 G24
0.6
0.4
0.2 0.4
0.8 1.2 1.4
0.2
0
TEMPERATURE (°C)
–50
SS PIN CURRENT (µA)
2.2
2.4
150
8614 G25
2.0
1.8
0
50
100
–25
25
75
125
2.6
2.1
2.3
1.9
2.5
V
SS
= 0.5V
TEMPERATURE (°C)
–50
7.0
PG THRESHOLD OFFSET FROM V
REF
(%)
7.5
8.5
9.0
9.5
12.0
10.5
0
50
75 100
8614 G26
8.0
11.0
11.5
10.0
–25
25
150125
FB RISING
FB FALLING
TEMPERATURE (°C)
–50
–12.0
PG THRESHOLD OFFSET FROM V
REF
(%)
–11.5
–10.5
–10.0
–9.5
–7.0
–8.5
0
50
75 100 125
8614 G27
–11.0
–8.0
–7.5
–9.0
–25
25
150
FB RISING
FB FALLING
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.