Datasheet

LTC3561A
4
3561af
Effi ciency vs Frequency Load Regulation
Line Regulation
Reference Voltage vs
Temperature
Frequency Variation vs
Temperature
Frequency Variation vs V
IN
TYPICAL PERFORMANCE CHARACTERISTICS
Effi ciency vs Input Voltage Effi ciency vs Output Current Effi ciency vs Output Current
T
A
= 25°C, V
IN
= 3.6V, f
O
= 1MHz, unless otherwise noted.
INPUT VOLTAGE (V)
2.5
50
EFFICIENCY (%)
60
70
80
3.0
3.5
4.0 4.5
3561A G01
5.0
90
100
55
65
75
85
95
5.5
I
OUT
= 100mA
V
OUT
= 1.8V
I
OUT
= 10mA
I
OUT
= 1A
OUTPUT CURRENT (mA)
110
0
EFFICIENCY (%)
40
30
100
1000100 10000
3561A G02
20
10
60
50
80
70
90
V
OUT
= 1.8V
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
OUTPUT CURRENT (mA)
110
0
EFFICIENCY (%)
40
30
100
1000100 10000
3561A G03
20
10
60
50
80
70
90
V
OUT
= 1.5V
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
FREQUENCY (MHz)
95
94
93
92
91
90
89
88
3561A G05
035
12
4
EFFICIENCY (%)
V
OUT
= 1.8V
I
LOAD
= 400mA
4.7μH
1μH
2.2μH
OUTPUT CURRENT(mA)
0.4
0.3
0.2
0.1
0
–0.1
–0.2
3561A G06
0 600 1000 1200 1400
200 400
800
V
OUT
ERROR (%)
V
OUT
= 1.8V
INPUT VOLTAGE(V)
0.6
0.4
0.2
0.0
–0.2
–0.4
–0.6
3561A G07
2.5 4.0 5.0 5.5
3.0 3.5
4.5
V
OUT
ERROR (%)
V
OUT
= 1.8V
I
LOAD
= 400mA
TEMPERATURE(°C)
815
810
805
800
795
790
785
3561A G08
–50 25 75 100 125
–25 0
50
REFERENCE VOLTAGE (mV)
TEMPERATURE(°C)
6
4
2
0
–2
–4
–6
3561A G09
–50 25 75 100 125
–25 0
50
FREQUENCY VARIATION (%)
V
IN
(V)
6
4
2
0
–2
–4
–6
–8
3561A G10
2.5 4.0 5.0 5.5
3.0 3.5
4.5
FREQUENCY VARIATION (%)