Datasheet

LTC3560
4
3560fb
TYPICAL PERFORMANCE CHARACTERISTICS
R
DS(ON
) vs Input Voltage R
DS(ON)
vs Temperature Dynamic Supply Current
Oscillator Frequency
vs Temperature
Oscillator Frequency
vs Supply Voltage Output Voltage vs Load Current
(From Figure 1a Except for the Resistive Divider Resistor Values)
TEMPERATURE (°C)
–50
2.00
OSCILLATOR FREQUENCY (MHz)
2.05
2.15
2.20
2.25
2.50
2.35
0
50
75
3560 G07
2.10
2.40
2.45
2.30
–25
25
100
125
V
IN
= 3.6V
INPUT VOLTAGE (V)
2
1.8
OSCILLATOR FREQUENCY (MHz)
1.9
2.0
2.1
2.2
34
5
6
3560 G08
2.3
2.4
2.5 3.5
4.5
5.5
LOAD CURRENT (mA)
0
1.78
OUTPUT VOLTAGE (V)
1.79
1.80
1.81
1.82
1.84
200
400 600 800
3560 G09
1000 1200
1.83
V
IN
= 3.6V
Burst Mode OPERATION
PULSE SKIP MODE
INPUT VOLTAGE (V)
0
R
DS(0N)
(Ω)
0.30
0.35
0.40
35
3560 G10
0.25
0.20
12
467
0.15
0.10
MAIN SWITCH
SYNCHRONOUS
SWITCH
TEMPERATURE (°C)
–50
R
DS(ON)
()
0.35
25
3560 G11
0.20
0.10
–25 0 50
0.05
0
0.40
0.30
0.25
0.15
75 100 125
SYNCHRONOUS SWITCH
MAIN SWITCH
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
INPUT VOLTAGE (V)
2
0
DYNAMIC SUPPLY CURRENT (µA)
50
100
150
200
34
5
6
3560 G12
250
300
2.5 3.5
4.5
5.5
V
OUT
= 1.2V
I
LOAD
= 0A
PULSE SKIPPING MODE
Burst Mode OPERATION
Effi ciency vs Output Current Effi ciency vs Output Current
Reference Voltage
vs Temperature
OUTPUT CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.1 10 100 1000
3560 G04
0
1
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
V
OUT
= 1.3V
OUTPUT CURRENT (mA)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.1 10 100 1000
3560 G05
0
1
V
IN
= 4.2V
V
IN
= 3.6V
V
OUT
= 1.8V
Burst Mode OPERATION
PULSE SKIP MODE
TEMPERATURE (°C)
–50
REFERENCE VOLTAGE (V)
0.605
0.610
0.615
25 75
3560 G06
0.600
0.595
–25 0
50 100 125
0.590
0.585
V
IN
= 3.6V