Datasheet

LTC3562
6
3562fa
TYPICAL PERFORMANCE CHARACTERISTICS
R600A Feedback Voltage
vs Temperature
Oscillator Frequency
vs Temperature
Output Voltage
vs Load Current (B Version)
Dynamic Supply Current
vs Input Voltage
Dynamic Supply Current
vs Input Voltage Burst Mode Operation
Forced Burst Mode Operation
Output Voltage vs Load Current
Switch R
DS(ON)
vs Input Voltage
TEMPERATURE (°C)
–50
0.790
VOLTAGE (mV)
0.794
0.798
0.802
–25
0
25 50 75
0.806
0.810
0.792
0.796
0.800
0.804
0.808
100
I
OUT
= 1mA
3562 G10
TEMPERATURE (°C)
–50
1.5
f
OSC
(MHz)
1.7
1.9
2.1
–25
0
25 50 75
2.3
2.5
1.6
1.8
2.0
2.2
2.4
100
V
IN
= 5.5V
V
IN
= 3.8V
V
IN
= 3V
V
IN
= 2.7V
3562 G11
LOAD CURRENT (mA)
0
1.190
VOLTAGE (V)
1.200
1.210
100
200
300 400 500
1.220
1.195
1.205
1.215
600
V
IN
= 3.8V
V
OUT
= 1.2V (TYPE-B)
PULSE SKIP
3562 G12
V
IN
VOLTAGE (V)
2.7 3.1
20
I
IN
(μA)
30
45
3.5
4.3
4.7
25
40
35
3.9
5.1
5.5
3562 G13
LDO MODE
Burst Mode OPERATION
FORCED Burst Mode
OPERATION
I
OUT
= 0mA
V
OUT
= 1.2V
VOLTAGE (V)
2
0
CURRENT (mA)
1
2
3
4
34
5
6
5
6
2.5 3.5
4.5
5.5
3562 G14
I
OUT
= 0mA
CONTINUOUS OPERATION
400mA – V
OUT
= 1.2V
600mA – V
OUT
= 1.2V
400mA – V
OUT
= 1.8V
600mA – V
OUT
= 1.8V
400mA – V
OUT
= 2.5V
600mA – V
OUT
= 2.5V
400mA – V
OUT
= 3.3V
600mA – V
OUT
= 3.3V
PULSE SKIP
OPERATION
2μs/DIV
V
OUT600A
50mV/DIV
AC
COUPLED
INDUCTOR
CURRENT
I
L
= 100mA/
DIV
SW
2V/DIV
3562 G15
PV
IN
= 3.8V
LOAD = 50mA
2μs/DIV
V
OUT600A
50mV/DIV
AC
COUPLED
INDUCTOR
CURRENT
I
L
= 150mA/
DIV
SW
2V/DIV
3562 G16
PV
IN
= 3.8V
LOAD = 50mA
LOAD CURRENT (mA)
0
1.12
VOLTAGE (V)
1.14
1.16
1.18
20
40
60 80 100 120
1.20
1.22
1.13
1.15
1.17
1.19
1.21
140
V
IN
= 3.8V
V
OUT
= 1.2V (TYPE-B)
3562 G17
LDO MODE
FORCED
Burst Mode
OPERATION
V
IN
VOLTAGE (V)
2.7 3.1
0
SWITCH R
DS(ON)
(Ω)
300
700
3.5
4.3
4.7
100
400
200
600
500
3.9
5.1
5.5
3562 G18
400mA PMOS
600mA NMOS
400mA NMOS
600mA PMOS