LT8705 Просмотр технического описания (PDF) - Linear Technology
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LT8705 Datasheet PDF : 44 Pages
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LT8705
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specified.
Minimum Inductor Current Sense
Voltage in Forced Continuous Mode
0
–20
BUCK REGION
–40
–60
–80
–100
BOOST REGION
–120
–140
0
20
40
60
80
100
M2 OR M3 DUTY CYCLE (%)
8705 G10
Maximum VC vs SS
2.0
1.8 TJ = 25°C
1.6
BOOST AND
BUCK-BOOST REGIONS
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0 0.2 0.4 0.6 0.8
SS (V)
BUCK
REGION
1.0 1.2 1.4
8705 G13
CLKOUT Duty Cycle
100
80
60
40
20
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
8705 G16
8
INTVCC Line Regulation
(EXTVCC = 0V)
7.0
6.5
6.0
5.5
5.0
4.5
4.0
4 6 8 10 12 14 16 18 20
VIN (V)
8705 G11
VIN Supply Current vs Voltage
(Not Switching)
3.5
GATEVCC CONNECTED TO INTVCC
3.0
2.5
2.0
1.5
1.0
0.5
0
5
125°C
25°C
–40°C
15 25 35 45 55 65 75
VIN (V)
8705 G14
LDO33 Pin Regulation
(ILDO33 = 1mA)
3.5
3.0
2.5
2.0
125°C
25°C
–40°C
1.5
2.5 3 3.5 4 4.5 5 5.5 6
INTVCC (V)
8705 G17
INTVCC Line Regulation
(VIN = 12V)
7.0
6.5
EXTVCC RISING
EXTVCC FALLING
6.0
5.5
4
6
8
10
12
EXTVCC (V)
8705 G12
IMON Output Currents
200
175
150
125
100
75
50
25
0
–25
–100
–50 0 50 100
CSPIN-CSNIN (mV)
CSPOUT-CSNOUT (mV)
150 200
8705 G15
SHDN and SWEN Pin Thresholds
vs Temperature
1.30
1.28
1.26
1.24
1.22
RISING
1.20
1.18
FALLING
1.16
1.14
1.12
1.10
–55 –35 –15 5
SHDN
SWEN
25 45 65 85 105 125 145
TEMPERATURE (°C)
8705 G18
8705p
For more information www.linear.com/8705
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