Datasheet

LTC3245
5
3245fa
For more information www.linear.com/LTC3245
Typical perForMance characTerisTics
5V Output Impedance
vs Temperature (Boost Mode)
3.3V Output Impedance
vs Temperature (Boost Mode)
Output Current vs Input Voltage
(V
OUT
5% Below Regulation)
5V Fixed Output Voltage
vs Falling Input Voltage
(Burst Mode Operation)
3.3V Fixed Output Voltage
vs Falling Input Voltage
(Burst Mode Operation)
ADJ Regulation Voltage
vs Temperature
T
A
= 25°C, unless otherwise noted.
V
IN
(V)
2
4.900
V
OUT
(V)
4.925
4.950
4.975
5.000
5.050
5.025
5.075
5.100
3 4 5 6 87 9
3245 G10
10 11 1412 13
15
I
OUT
= 250mA
I
OUT
= 1mA
–55°C
25°C
125°C
V
IN
(V)
2
3.200
V
OUT
(V)
3.225
3.250
3.275
3.300
3.350
3.325
3.375
3.400
3 4 5 6 87 9
3245 G11
10 11 1412 13
15
I
OUT
= 250mA
I
OUT
= 1mA
–55°C
25°C
125°C
TEMPERATURE (°C)
–60
0
R
OUT
(Ω)
5
10
15
20
25
30
–30 0 30 60
3245 G13
90 120
150
V
IN
= 2.7V
V
IN
= 3.3V
LOW NOISE
Burst Mode OPERATION
TEMPERATURE (°C)
–60
0
R
OUT
(Ω)
5
10
15
30
25
20
35
40
–30 0 30
3245 G14
60 90 120
150
V
IN
= 2.7V
V
IN
= 3.3V
LOW NOISE
Burst Mode OPERATION
V
IN
(V)
2
0
I
OUT
(mA)
100
200
300
700
600
500
400
800
3 4 5 6
3245 G15
7 8 9 10 11 12 13
14
5V Burst Mode
OPERATION
3.3V Burst Mode
OPERATION
3.3V LOW NOISE
5V LOW NOISE
TEMPERATURE (°C)
–60
1.180
ADJ (V)
1.185
1.190
1.195
1.200
1.210
1.205
1.215
1.220
–30 0 30 60
3245 G12
90 120
150
V
OUT
(V)
2.5
0
V
IN
(V)
1
2
7
6
5
4
3
8
11
10
9
12
3
3245 G17
3.5 4 4.5 5
BUCK
LDO
FALLING
RISING
RISING
FALLING
BOOST
I
OUT
= 150mA
V
OUT
(V)
2.5
0
V
IN
(V)
1
2
7
6
5
4
3
8
11
10
9
12
3
3245 G18
3.5 4 4.5 5
BUCK
LDO
FALLING
RISING
RISING
FALLING
BOOST
I
OUT
= 250mA
V
OUT
(V)
2.5
0
V
IN
(V)
1
2
7
6
5
4
3
8
11
10
9
12
3
3245 G16
3.5 4 4.5 5
BUCK
I
OUT
= 1mA
LDO
FALLING
RISING
RISING
FALLING
BOOST
Operating Mode Transition
Voltage vs Input Voltage
Operating Mode Transition
Voltage vs Input Voltage
Operating Mode Transition
Voltage vs Input Voltage