LTC3834 Linear Technology, LTC3834 Datasheet - Page 5

• Manufacturer Part Number: LTC3834
• Description: Synchronous Step-Down Controller
• Manufacturer: Linear Technology

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TYPICAL PERFORMANCE CHARACTERISTICS
100mV/DIV
CONTINUOUS
COUPLED
OPERATION
Burst Mode
SKIPPING
2A/DIV
200
350
300
250
150
100
FORCED
V
50
2A/DIV
PULSE
0
OUT
MODE
MODE
AC
5
I
Total Input Supply Current vs
Input Voltage
L
FIGURE 11 CIRCUIT
Load Step (Burst Mode Operation)
V
FIGURE 11 CIRCUIT
OUT
Inductor Current at Light Load
V
I
FIGURE 11 CIRCUIT
LOAD
OUT
NO LOAD
10
= 3.3V
= 3.3V
= 100μA
INPUT VOLTAGE (V)
15
300μA LOAD
20μs/DIV
20
2μs/DIV
25
30
3834 G10
3834 G04
35
3834 G07
100mV/DIV
COUPLED
1V/DIV
2A/DIV
6.0
5.8
5.6
5.4
5.2
4.8
4.6
4.4
4.0
5.0
4.2
V
V
OUT
OUT
–45
AC
I
EXTV
Voltages vs Temperature
L
Soft Start-Up
FIGURE 11 CIRCUIT
Load Step
(Forced Continuous Mode)
V
FIGURE 11 CIRCUIT
OUT
–25
CC
= 3.3V
Switchover and INTV
–5
TEMPERATURE (°C)
INTV
15
20ms/DIV
EXTV
20μs/DIV
CC
EXTV
35
CC
CC
RISING
FALLING
55
75
CC
T
3834 G11
A
3834 G08
3834 G05
= 25°C, unless otherwise noted.
95
100mV/DIV
COUPLED
Tracking Start-Up
FIGURE 11 CIRCUIT
2A/DIV
5.5
5.4
5.3
5.2
5.1
5.0
V
OUT
AC
0
I
INTV
L
Load Step (Pulse Skipping Mode)
V
FIGURE 11 CIRCUIT
OUT
5
CC
= 3.3V
Line Regulation
10
20ms/DIV
INPUT VOLTAGE (V)
15
20μs/DIV
LTC3834
20
25
3834 G09
30
35
MASTER
2V/DIV
V
2V/DIV
3834 G12
OUT
3834fb
5
3834 G06
40