Datasheet

LTC3827
6
3827ff
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
INPUT VOLTAGE (V)
5
350
300
250
200
150
100
50
0
20 30
3827 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
3827 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
3827 G12
5.10
5.40
5.45
5.30
515
30
35
40
I
TH
PIN VOLTAGE (V)
0
40
60
100
0.6 1.0
3827 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
6789
200
3827 G14
–500
12345 10
–100
0
100
DUTY CYCLE (%)
0
CURRENT SENSE THRESHOLD (mV)
40
80
120
20
60
100
20 40 60 80
3827 G15
10010030507090
Foldback Current Limit Quiescent Current vs Temperature
SENSE Pins Total Input
Bias Current vs I
TH
FEEDBACK VOLTAGE (V)
0
0
MAXIMUM CURRENT SENSE VOLTAGE (V)
20
60
80
100
0.2
0.4
0.5 0.9
3827 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
3827 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
3827 G18
0
0.2
0.4 0.6 0.8 1.0 1.2 1.4
10
V
SENSE
= 3.3V