Datasheet

LT8612
5
8612fa
For more information www.linear.com/LT8612
TYPICAL PERFORMANCE CHARACTERISTICS
Top FET Current Limit
Minimum On-Time Minimum Off-Time
Dropout Voltage
Burst FrequencySwitching Frequency
No Load Supply Current
Top FET Current Limit vs Duty
Cycle
Minimum Load to Full Frequency
(SYNC Hi)
DUTY CYCLE (%)
0
TOP FET CURRENT LIMIT (A)
4
6
10
8
20
40
8612 G11
5
9
7
60
80 100
TEMPERATURE (°C)
–50
CURRENT LIMIT (A)
4
6
7
11
9
–25
0
8612 G12
5
10
8
25 50
75 100 125 150
15% DUTY CYCLE
70% DUTY CYCLE
LOAD CURRENT (A)
0
MINIMUM ON-TIME (ns)
15
25
30
45
1
8612 G13
20
40
35
2 3
4 5 6
V
SYNC
= 0V
V
SYNC
= 3.3V
TEMPERATURE (°C)
–50
SWITCHING FREQUENCY (kHz)
660
710
720
740
8612 G16
700
690
680
670
730
–25 0
25 50 15010075 125
R
T
= 60.4k
INPUT VOLTAGE (V)
0
MINIMUM LOAD (mA)
0
40
50
60
8612 G18
30
20
10
10
20 5030 40
INPUT VOLTAGE (V)
0
INPUT CURRENT (µA)
2.0
2.4
2.6
2.8
3.8
3.2
10
20
8612 G10
2.2
3.4
3.6
3.0
30
40 50
V
OUT
= 5V
TEMPERATURE (°C)
–50
MINIMUM OFF-TIME (ns)
60
80
85
100
–25
8612 G14
75
70
65
95
90
0 25
50 75 150100 125
LOAD CURRENT (mA)
0
SWITCH FREQUENCY (kHz)
0
500
600
800
8612 G17
400
300
200
100
700
100
200 500300 400
V
IN
= 12V
V
OUT
= 5V
L = 3.9µH
LOAD CURRENT (A)
0
DROPOUT VOLTAGE (V)
0
0.3
0.4
0.6
8612 G15
0.2
0.1
0.5
1 2
3 64 5
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.