Datasheet

LTC3829
6
3829fa
For more information www.linear.com/LTC3829
TYPICAL PERFORMANCE CHARACTERISTICS
Phase Shedding Transition Phase Shedding Transition
Prebiased Output at 2V Coincident Tracking
Current Sense Threshold
vs I
TH
Voltage
Quiescent Current vs Input
Voltage without EXTV
CC
INTV
CC
Line Regulation
INPUT VOLTAGE (V)
0
2.00
INTV
CC
VOLTAGE (V)
2.50
2.25
3.00
2.75
3.50
3.25
4.75
4.50
4.25
4.00
3.75
5.25
5
10 15 20
3829 G09
25 4030 35
5.00
V
ITH
(V)
0
–40
V
SENSE
(mV)
–20
0
20
40
60
80
0.5 1 1.5 2
3829 G10
I
LIM
= INTV
CC
I
LIM
= FLOAT
I
LIM
= GND
RUN
2V/DIV
V
OUT1
= 3.3V
V
OUT2
= 1.5V
1V/DIV
2ms/DIVV
IN
= 12V
NO LOAD
3829 G06
V
OUT1
V
OUT2
INPUT VOLTAGE (V)
4
3.5
SUPPLY CURRENT (mA)
3.7
4.1
4.3
4.5
5.5
4.9
14
24
3829 G08
3.9
5.1
5.3
4.7
34
40
V
SW1
10V/DIV
V
SW2
10V/DIV
V
SW3
10V/DIV
V
OUT
50mV/DIV
AC-COUPLED
4µs/DIVV
IN
= 12V
V
OUT
= 1.5V
TRANSITION LOAD CURRENT = 18.6A
3829 G03
V
SW1
10V/DIV
V
SW2
10V/DIV
V
SW3
10V/DIV
V
OUT
50mV/DIV
AC-COUPLED
4µs/DIVV
IN
= 12V
VOUT = 1.5V
TRANSITION LOAD CURRENT = 5.3A
3829 G04
V
OUT
1V/DIV
V
FB
500mV/DIV
TK/SS
500mV/DIV
2ms/DIVV
IN
= 12V
V
OUT
= 3.3V
3829 G05