Linear Technology Analog Devices LT8708 Datasheet page 10

LT8708
TYPICAL PERFORMANCE CHARACTERISTICS
Minimum Inductor Current Sense
Voltage vs Duty Cycle
0
–20
–40
BUCK REGION
–60
–80
–100
–120
BOOST REGION
–140
0 20 40 60
M2 OR M3 DUTY CYCLE (%)
Maximum and Minimum V
Maximum and Minimum V
2.5
T = 25°C
J
BOOST REGION
2.0
MAXIMUM V
C
BUCK REGION
1.5
1.0
MINIMUM V
C
0.5
0
0 0.3 0.6 0.9
SS (V)
CLKOUT Duty Cycle
CLKOUT Duty Cycle
100
80
60
40
20
0
–45 –20 5 30 55 80
TEMPERATURE (°C)
10
INTV
CC
(EXTV
CC
7.0
6.5
6.0
5.5
5.0
4.5
4.0
80 100
4 6
8708 G10
INTV
CC
vs SS (V = 12V)
vs SS
C IN
C
7.0
6.5
6.0
5.5
4
1.2 1.5
8708 G13
LDO33 Pin Regulation
(I
LDO33
3.5
3.0
2.5
2.0
1.5
105 130 155 2.5 3
8708 G16
For more information
Line Regulation
= 0V)
8 10 12 14 16 18 20
V (V)
IN
8708 G11
Line Regulation
EXTV RISING
CC
EXTV FALLING
CC
6 8 10 12
EXTV (V)
CC
8708 G14
= 1mA)
150°C
–45°C
25°C
3.5 4 4.5 5 5.5 6 6.5
INTV (V)
CC
8708 G17
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Minimum Inductor Current Sense
Voltage at Minimum Duty Cycle
0
–20
–40
–60
BUCK REGION
–80
–100
BOOST REGION
–120
–45 –20 5 30 55 80
TEMPERATURE (°C)
IMONx, ICx Output Current
250.0
225.0 IMON_INN
IMON_ON
200.0
ICN
175.0
IMON_INP
150.0
IMON_OP
125.0
ICP
100.0
75.0
50.0
25.0
0
–25.0
–200 –100 0
CSPIN–CSNIN (mV)
CSPOUT–CSNOUT (mV)
V Supply Current vs Voltage
IN
(Not Switching)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
5 20 35 50
V (V)
IN
105 130 155
8708 G12
100 200
8708 G15
150°C
–45°C
25°C
65 80
8708 G18
Rev 0