Datasheet

LTC3569
7
3569fe
For more information www.linear.com/LTC3569
Load Step Cross Talk, Pulse-Skipping,
V
IN
= 3.6V, CH1 = V
OUT1
, CH2 = V
OUT2
,
CH3 = V
OUT3
, CH4 = I
LOAD1
Load Step Cross Talk, Pulse-Skipping,
V
IN
= 3.6V, CH1 = V
OUT1
, CH2 = V
OUT2
,
CH3 = V
OUT3
, CH4 = I
LOAD2
I
SW
Leakage vs V
SUPPLY
Buck 1
Load Step Cross Talk, Pulse-Skipping,
V
IN
= 3.6V, CH1 = V
OUT1
, CH2 = V
OUT2
,
CH3 = V
OUT3
, CH4 = I
LOAD3
Soft-Start Into Heavy Load, PS, V
IN
=
3.6V, CH1 = V
OUT1
, CH2 = V
OUT2
, CH3
= V
OUT3
, CH4 = I
IN
, R2 = PGOOD
Soft-Start Into Light Load, PS, V
IN
=
3.6V, CH1 = V
OUT1
, CH2 = V
OUT2
, CH3
= V
OUT3
, CH4 = I
IN
, R3 = PGOOD
CH1
310mV
P-P
CH2
16.8mV
P-P
CH3
12mV
P-P
CH4
1.2A
20µs/DIV
3569 G19
100mV/DIV
20mV/DIV
20mV/DIV
500mA/DIV
CH1
9.6mV
P-P
CH2
246mV
P-P
CH3
8mV
P-P
CH4
600mA
20µs/DIV
3569 G20
20mV/DIV
100mV/DIV
20mV/DIV
500mA/DIV
CH1
11.6mV
P-P
CH2
11.2mV
P-P
CH3
266mV
P-P
CH4
600mA
20µs/DIV
3569 G21
20mV/DIV
20mV/DIV
100mV/DIV
500mA/DIV
V
SW
(V)
0
I
SW
(nA)
10000
1000
1
0.1
10
100
0.01
0.001
2
3569 G22
3.631
V
IN
= 3.6V
V
FB
= 0.9V
BUCK2, BUCK3 OFF
85°C
25°C
–50°C
CH1 500mV/DIV
CH3 500mV/DIV
CH2 500mV/DIV
R2
2V/DIV
CH4
500mA/DIV
400µs/DIV
3569 G23
400µs/DIV
3569 G24
CH1 500mV/DIV
CH3 500mV/DIV
CH2 500mV/DIV
R3
2V/DIV
CH4
50mA/DIV
Typical perForMance characTerisTics
T
A
= 25°C, unless otherwise noted.