Datasheet

LTC3835-1
5
38351fc
TYPICAL PERFORMANCE CHARACTERISTICS
Inductor Current at Light Load
Soft Start-Up Tracking Start-Up
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
T
A
= 25°C, unless otherwise noted.
4μs/DIV
PULSE-
SKIPPING
MODE
38351 G07
2A/DIV
Burst Mode
OPERATION
FORCED
CONTIN-
UOUS
MODE
20ms/DIV
38351 G08
V
OUT
1V/DIV
20ms/DIV
38351 G09
V
OUT2
2V/DIV
V
OUT1
2V/DIV
(SLAVE)
(MASTER)
FIGURE 10 CIRCUIT
V
OUT
= 3.3V
I
LOAD
= 300μA
FIGURE 10 CIRCUIT FIGURE 10 CIRCUIT
INPUT VOLTAGE (V)
5
350
300
250
200
150
100
50
0
20 30
38351 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
38351 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
38351 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
38351 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
38351 G14
–500
12345 10
–100
0
100
DUTY CYCLE (%)
0
CURRENT SENSE THRESHOLD (mV)
40
80
120
20
60
100
20 40 60 80
38351 G15
10010030507090