Datasheet

LTC3835
6
3835fd
TYPICAL PERFORMANCE CHARACTERISTICS
Total Input Supply Current
vs Input Voltage
EXTV
CC
Switchover and INTV
CC
Voltages vs Temperature INTV
CC
Line Regulation
Maximum Current Sense Voltage
vs I
TH
Voltage
Sense Pins Total Input
Bias Current
Maximum Current Sense
Threshold vs Duty Cycle
Foldback Current Limit
Quiescent Current
vs Temperature
SENSE Pins Total Input
Bias Current vs I
TH
INPUT VOLTAGE (V)
5
350
300
250
200
150
100
50
0
20 30
3835 G10
10 15
25 35
SUPPLY CURRENT (µA)
300µA LOAD
NO LOAD
TEMPERATURE (°C)
–45
4.0
EXTV
CC
AND INTV
CC
VOLTAGES (V)
4.2
4.6
4.8
5.0
6.0
5.4
–5
35
55
3835 G11
4.4
5.6
5.8
5.2
–25
15
75 95
EXTV
CC
FALLING
EXTV
CC
RISING
INTV
CC
INPUT VOLTAGE (V)
0
5.00
INTV
CC
VOLTAGE (V)
5.05
5.15
5.20
5.25
5.50
5.35
10
20
25
3835 G12
5.10
5.40
5.45
5.30
5 15
30
35
40
I
TH
PIN VOLTAGE (V)
0
40
60
100
0.6 1.0
3835 G13
20
0
0.2 0.4
0.8 1.2 1.4
–20
–40
80
CURRENT SENSE THRESHOLD (mV)
PULSE SKIPPING
FORCED CONTINUOUS
BURST MODE (RISING)
BURST MODE (FALLING)
10% Duty Cycle
V
SENSE
COMMON MODE VOLTAGE (V)
0
–700
INPUT CURRENT (µA)
–600
–400
–300
–200
6 7 8 9
200
3835 G14
–500
1 2 3 4 5 10
–100
0
100
DUTY CYCLE (%)
0
CURRENT SENSE THRESHOLD (mV)
40
80
120
20
60
100
20 40 60 80
3835 G15
100100 30 50 70 90
FEEDBACK VOLTAGE (V)
0
0
MAXIMUM CURRENT SENSE VOLTAGE (V)
20
60
80
100
0.2
0.4
0.5 0.9
3835 G16
40
0.1 0.3
0.6
0.7
0.8
120
TRACK/SS = 1V
TEMPERATURE (°C)
–45
QUIESCENT CURRENT (µA)
80
85
90
75
3835 G17
75
70
60
–15
15
45
–30 90
0
30
60
65
100
95
PLLIN/MODE = 0V
I
TH
VOLTAGE (V)
0
INPUT CURRENT (µA)
2
4
6
8
12
3835 G18
0
0.2
0.4 0.6 0.8 1.0 1.2 1.4
10
V
SENSE
= 3.3V
T
A
= 25ºC, unless otherwise noted.