Datasheet

LTC3562
5
3562fa
TYPICAL PERFORMANCE CHARACTERISTICS
Effi ciency vs Load Current Effi ciency vs Load Current Effi ciency vs Load Current
Effi ciency vs Load Current
Effi ciency vs Input Voltage
Burst Mode Operation
Effi ciency vs Input Voltage
Burst Mode Operation
Output Transient
Burst Mode Operation
Output Transient
Pulse Skip Mode
Start-Up Transient
Pulse Skip Mode
I
OUT
(mA)
0.01
40
EFFICIENCY (%)
50
60
70
80
0.1 1 10010 1000
30
20
10
0
90
100
3562 G01
PULSE SKIP
V
IN
= 3.8V
V
OUT
= 1.2V
FORCED
Burst Mode OPERATION
600mA
BUCKS
Burst Mode
OPERATION
I
OUT
(mA)
0.01
40
EFFICIENCY (%)
50
60
70
80
0.1 1 10010 1000
30
20
10
0
90
100
3562 G02
PULSE SKIP
V
IN
= 3.8V
V
OUT
= 1.8V
Burst Mode
OPERATION
FORCED
Burst Mode OPERATION
600mA
BUCKS
I
OUT
(mA)
0.01
40
EFFICIENCY (%)
50
60
70
80
0.1 1 10010 1000
30
20
10
0
90
100
3562 G03
PULSE SKIP
V
IN
= 3.8V
V
OUT
= 2.5V
Burst Mode
OPERATION
FORCED
Burst Mode
OPERATION
600mA
BUCKS
I
OUT
(mA)
0.01
40
EFFICIENCY (%)
50
60
70
80
0.1 1 10010 1000
30
20
10
0
90
100
3562 G04
PULSE SKIP
V
IN
= 3.8V
V
OUT
= 3.3V
Burst Mode
OPERATION
FORCED Burst Mode
OPERATION
600mA
BUCKS
INPUT VOLTAGE (V)
2.5
0
EFFICIENCY (%)
20
40
60
3
3.5
4 4.5 5
80
100
10
30
50
70
90
5.5
I
OUT
= 0.1mA
I
OUT
= 1mA
I
OUT
= 10mA
I
OUT
= 100mA
I
OUT
= 400mA
V
OUT
= 1.2V
3562 G05
INPUT VOLTAGE (V)
2.5
0
EFFICIENCY (%)
20
40
60
3
3.5
4 4.5 5
80
100
10
30
50
70
90
5.5
I
OUT
= 0.1mA
I
OUT
= 1mA
I
OUT
= 10mA
I
OUT
= 100mA
I
OUT
= 400mA
V
OUT
= 1.8V
3562 G06
50μs/DIV
V
OUT400B
50mV/DIV
AC
COUPLED
V
OUT400A
50mV/DIV
AC
COUPLED
300mA
5mA
3562 G07
V
OUT400B
= 1.2V
V
OUT400A
= 1.2V
I
OUT400A
= 20mA
I
OUT400B
50μs/DIV
V
OUT400B
50mV/DIV
AC
COUPLED
V
OUT600B
50mV/DIV
AC
COUPLED
300mA
5mA
3562 G08
V
OUT400B
= 1.8V
V
OUT600B
= 1.2V
I
OUT600B
= 15mA
I
OUT400B
50μs/DIV
V
OUT600A
500mV/DIV
INDUCTOR
CURRENT
I
L
= 100mA/
DIV
2V/DIV ON
3562 G09
V
OUT600A
= 1.2V
R
LOAD
= 6Ω
RUN600A OFF