Linear Technology Analog Devices LT8607, Datasheet

Page: 5 / 22

LT8607/LT8607B
5
Rev. C
For more information www.analog.com
DUTY CYCLE (%)
0 20 40 60 80 100
1.20
1.30
1.40
1.50
1.60
1.70
TOP FET CURRENT LIMIT (A)
8607 G10
SWITCH CURRENT (mA)
0 125 250 375 500 625 750
0
50
100
150
200
250
300
SWITCH DROP (mV)
8607 G13
TOP SW
BOT SW
DUTY CYCLE = 0
TEMPERATURE (°C)
–50 –10 30 70 110 150
1.50
1.55
1.60
1.65
1.70
TOP FET CURRENT LIMIT (A)
8607 G11
I
OUT
= 750mA
TEMPERATURE (°C)
–50 –30 –10 10 30 50 70 90 110 130 150
32
33
34
35
36
37
38
MINIMUM ON-TIME (ns)
8607 G14
SWITCH CURRENT = 750mA
TOP SW
BOT SW
TEMPERATURE (°C)
–50 –30 –10 10 30 50 70 90 110 130 150
50
100
150
200
250
300
350
400
450
SWITCH DROP (mV)
8607 G12
I
OUT
= 350mA
TEMPERATURE (°C)
–50 –30 –10 10 30 50 70 90 110 130 150
80
85
90
95
100
105
110
MINIMUM OFF-TIME (ns)
8607 G15
TYPICAL PERFORMANCE CHARACTERISTICS
Top FET Current Limit
vs Duty Cycle
Top FET Current Limit
vs Temperature Switch Drop vs Temperature
Switch Drop vs Switch Current
Minimum On-Time
vs Temperature
Minimum Off-Time
vs Temperature
Dropout Voltage vs Output Current
Switching Frequency
vs Temperature
Burst Frequency vs
Output Current
L: XFL4020-472ME
OUTPUT CURRENT (A)
0 125 250 375 500 625 750
0
50
100
150
200
250
300
350
DROPOUT VOL
TAGE (mV)
8607 G16
R
T
= 18.2kΩ
TEMPERATURE (°C)
–50 –10 30 70 110 150
1975
1980
1985
1990
1995
2000
2005
2010
2015
2020
2025
SWITCHING FREQUENCY (kHz)
8607 G17
T
A
= 25°C, unless otherwise noted.
SYNC = 0V OR LT8607 DFN
OUTPUT CURRENT (mA)
0 25 50 75 100 125
0
250
500
750
1000
1250
1500
1750
2000
2250
2500
SWITCHING FREQUENCY (kHz)
8607 G18
V
IN
= 12V
L = 2.2µH
V
OUT
= 3.3V