ltc3527eud-trpbf Linear Technology Corporation, ltc3527eud-trpbf Datasheet - Page 5

• Manufacturer Part Number: ltc3527eud-trpbf
• Description: Dual 800ma/400ma, 1.2mhz/2.2mhz Synchronous Step-up Dc/dc Converters
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
1000
100
180
160
140
120
100
80
60
40
20
10
0
0.635
0.5
No-Load Input Current vs V
Minimum Load Resistance During
Start-Up vs V
V
1.8V
CONVERTER 1
OUT
1
0.685
=
1.5
V
OUT
0.735
CONVERTER 2
= 5V
2
IN
V
2.4V
V
V
OUT
0.785 0.835 0.885
IN
IN
2.5
70
60
50
40
30
20
10
(V)
0
(V)
=
1
Burst Mode Threshold Current
vs V
3
V
OUT
1.5
IN
3.5
CONVERTER 2
for V
= 3.3V
IN
CONVERTER 1
CONVERTER 2
2
35271 G12
4
35271 G09
OUT1
0.935
4.5
2.5
V
IN
= V
CONVERTER 1
(V)
OUT2
3
LEAVE BURST
ENTER BURST
800
700
600
500
400
300
200
100
45
40
35
30
25
20
15
10
3.5
5
0
= 5V
0
0.5
0.7
Burst Mode Threshold Current
vs V
Maximum Output Current
vs V
4
35271 G15
CONVERTER 2
0.8
1
IN
IN
V
1.8V
OUT
for V
for Converter 1
4.5
1.5
CONVERTER 2
0.9
CONVERTER 1
=
V
2.5V
OUT
OUT1
2
1
=
CONVERTER 1
V
V
V
OUT
IN
IN
= V
2.5
1.1
(V)
(V)
= 5V
OUT2
1.2
V
3
OUT
ENTER BURST
LEAVE BURST
2.00
1.50
1.00
= 1.8V
2.50
3.5
1.3
= 3.3V
–45
Oscillator Frequency
vs Temperature
(T
1.4
V
V
35271 G13
4
35271 G10
IN
OUT
–30
A
= 1.2V
= 25°C, unless otherwise noted)
= 3.3V
4.5
1.5
–15
LTC3527/LTC3527-1
TEMPERATURE (°C)
0
FSEL = 3.3V
FSEL = 0V
500
450
400
350
300
250
200
150
100
15
60
50
40
30
20
10
50
0
0
0.5
1
Burst Mode Threshold Current
vs V
Maximum Output Current
vs V
30
CONVERTER 2
1.2
1
IN
IN
V
1.8V
45
OUT
1.4
CONVERTER 1
CONVERTER 2
for V
for Converter 2
1.5
60
=
1.6
V
2.5V
OUT1
35271 G16
75
OUT
CONVERTER 1
2
1.8
V
V
V
=
OUT
IN
IN
90
2.5
= V
2
(V)
(V)
V
= 5V
OUT
OUT2
2.2
3
= 3.3V
LEAVE BURST
ENTER BURST
2.4
= 3.3V
3.5
2.6
35271 G14
4
2.8
35271 G11
35271f
5
4.5
3