Datasheet

LTC3569
6
3569fe
For more information www.linear.com/LTC3569
Typical perForMance characTerisTics
Line Regulation
FB Pin Leakage I
QSD
vs Temperature
V
SUPPLY
(V)
2
V
OUT
ERROR (%)
0.15
0.05
0.10
–0.05
0.00
–0.10
–0.15
4
3569 G16
653
BUCK2 = 1.2V
BUCK1 = 1.8V
BUCK3 = 1.5V
PULSE-SKIPPING MODE
I
LOAD1
= 200mA
I
LOAD2, 3
= 150mA
EACH BUCK TESTED INDIVIDUALLY
V
FB
(V)
0
I
FB
(nA)
1000
10
100
0.1
1
0.01
0.001
4
3569 G17
65321
SLAVE
DETECTOR = 250nA
I
FB2,3
I
FB1
V
IN
= 5.5V
TEMPERATURE (°C)
–50
I
SVIN
(nA)
10000
1000
10
100
1
0.1
50
3569 G18
1501000
V
IN
= 5.5V
T
A
= 25°C, unless otherwise noted.
Buck1 Load Regulation Buck2 Load Regulation
Buck3 Load Regulation
I
LOAD
(A)
0
V
OUT
ERROR (%)
0.6
0.0
0.2
0.4
–0.4
–0.2
–0.6
0.6
3569 G13
1.20.8 10.2 0.4
V
IN
= 5.5V
V
IN
= 4.5V
V
IN
= 3.5V
V
IN
= 2.5V
PULSE-SKIPPING
BUCK2, 3 OFF
I
LOAD
(A)
0
V
OUT
ERROR (%)
0.6
0.0
0.2
0.4
–0.4
–0.2
–0.6
0.3
3569 G14
0.60.4 0.50.1 0.2
V
IN
= 5.5V
V
IN
= 4.5V
V
IN
= 3.5V
V
IN
= 2.5V
BUCK1, 3 OFF
PULSE-SKIPPING
I
LOAD
(A)
0
V
OUT
ERROR (%)
0.6
0.0
0.2
0.4
–0.4
–0.2
–0.6
0.3
3569 G15
0.60.4 0.50.1 0.2
BUCK1, 2 OFF
V
OUT3
= 1.5V
PULSE-SKIPPING