Datasheet

LT8611
6
8611fa
For more information www.linear.com/LT8611
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
8611 G19
200
0
1 2
0.5
1.5 2.5
600
800
300
100
500
700
3
TEMPERATURE (°C)
–55
SWITCHING FREQUENCY (kHz)
730
35
8611 G20
700
680
–25 5 65
670
660
740
R
T
= 60.4k
720
710
690
95 125 155
LOAD CURRENT (mA)
0
SWITCHING FREQUENCY (kHz)
400
500
600
200
8611 G21
300
200
0
50
100
150
100
800
V
IN
= 12V
V
OUT
= 3.3V
700
INPUT VOLTAGE (V)
LOAD CURRENT (mA)
60
80
100
15 25 40
45
8611 G22
40
20
0
5 10
20
30 35
V
OUT
= 5V
f
SW
= 700kHz
FB VOLTAGE (V)
0
SWITCHING FREQUENCY (kHz)
300
400
500
0.6
1
8611 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
8611 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)
2.3
35
8611 G25
2.0
1.8
–25 5 65
1.7
1.6
2.4
2.2
2.1
1.9
95 125
155
V
SS
= 0.5V
TEMPERATURE (°C)
–55
7.0
PG THRESHOLD OFFSET FROM V
REF
(%)
7.5
8.5
9.0
9.5
12.0
10.5
5
65
95 125
8611 G26
8.0
11.0
11.5
10.0
–25
35
155
FB RISING
FB FALLING
TEMPERATURE (°C)
–55
–12.0
PG THRESHOLD OFFSET FROM V
REF
(%)
–11.5
–10.5
–10.0
–9.5
–7.0
–8.5
5
65
95 125
8611 G27
–11.0
–8.0
–7.5
–9.0
–25
35
155
FB RISING
FB FALLING
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