LTC3835-1 Linear Technology, LTC3835-1 Datasheet - Page 5

• Manufacturer Part Number: LTC3835-1
• Description: Low IQ Synchronous Step-Down Controller
• Manufacturer: Linear Technology

www.datasheet4u.com
TYPICAL PERFORMANCE CHARACTERISTICS
OPERATION
Burst Mode
SKIPPING
CONTIN-
FORCED
PULSE-
2A/DIV
MODE
MODE
UOUS
100
–40
350
300
250
200
150
100
–20
40
20
50
80
60
0
0
5
0
Inductor Current at Light Load
Total Input Supply Current
vs Input Voltage
Maximum Current Sense Voltage
vs I
FIGURE 10 CIRCUIT
V
I
LOAD
OUT
0.2
TH
= 3.3V
= 300μA
10
PULSE SKIPPING
FORCED CONTINUOUS
BURST MODE (RISING)
BURST MODE (FALLING)
300μA LOAD
NO LOAD
Voltage
0.4
I
INPUT VOLTAGE (V)
TH
15
PIN VOLTAGE (V)
4μs/DIV
0.6
20
0.8
10% DUTY CYCLE
25
1.0
30
1.2
38351 G07
38351 G10
38351 G13
1.4
35
1V/DIV
–100
–200
–300
–400
–500
–600
–700
V
200
100
OUT
6.0
5.8
5.6
5.4
5.2
5.0
4.8
4.6
4.4
4.2
4.0
0
–45
0
Soft Start-Up
FIGURE 10 CIRCUIT
EXTV
Voltages vs Temperature
Sense Pins Total Input
Bias Current
1
V
–25
SENSE
CC
2
Switchover and INTV
COMMON MODE VOLTAGE (V)
–5
TEMPERATURE (°C)
3
4
20ms/DIV
15
5
35
INTV
EXTV
EXTV
6
CC
CC
CC
55
7
RISING
FALLING
8
T
A
75
CC
38351 G08
38351 G14
38351 G11
= 25°C, unless otherwise noted.
9
95
10
5.50
5.45
5.40
5.35
5.30
5.25
5.20
5.15
5.10
5.00
5.05
120
100
80
60
40
20
0
0
0
Tracking Start-Up
FIGURE 10 CIRCUIT
INTV
Maximum Current Sense Threshold
vs Duty Cycle
10
5
CC
20
Line Regulation
10
30
INPUT VOLTAGE (V)
DUTY CYCLE (%)
LTC3835-1
15
40
20ms/DIV
20
50
60
25
70
30
(MASTER)
80
(SLAVE)
2V/DIV
2V/DIV
V
V
35
OUT2
OUT1
38351 G09
38351 G15
90
38351fc
38351 G12
5
100
40