Datasheet

LTC3112
7
3112fc
For more information www.linear.com/LTC3112
Typical perForMance characTerisTics
T
A
= 25°C, V
IN
= 5.0V, V
OUT
= 5.0V unless otherwise specified
I
OUT
Voltage vs V
OUT
I
OUT
Voltage
vs V
IN
and Switching Frequency
3.3V
OUT
Die Temperature Rise
vs Continuous Load Current
4 Layer Demo Board at 25°C
V
OUT
(V)
2 3
I
OUT
VOLTAGE (mV)
1500
2000
2500
500
1000
0
8 97 10 11 12 13 144 5 6
3112 G22
I
OUT
= 2A
I
OUT
= 1.5A
I
OUT
= 1A
I
OUT
= 500mA
R
IOUT
= 42.2k, C
IOUT
= 100pF,
V
IN
= 7.5V, 750kHz
V
IN
(V)
2 3
I
OUT
VOLTAGE (mV)
1500
2000
2500
500
1000
0
8 97 10 11 12 13 14 154 5 6
3112 G23
2A, 1500kHz
2A, 750kHz
2A, 300kHz
1A, 1500kHz
1A, 750kHz
1A, 300kHz
R
IOUT
= 42.2k, C
IOUT
= 100pF,
V
OUT
= 5V, 750kHz
LOAD CURRENT (A)
0
TEMPERATURE RISE (°C)
30
40
50
60
10
20
0
0.5 1 1.5 42 2.5 3 3.5
3112 G24
V
IN
= 2.7V
V
IN
= 5V
V
IN
= 12V
5V
OUT
Die Temperature Rise
vs Continuous Load Current
4 Layer Demo Board at 25°C
12V
OUT
Die Temperature Rise
vs Continuous Load Current
4 Layer Demo Board at 25°C
LOAD CURRENT (A)
0
TEMPERATURE RISE (°C)
30
40
50
60
10
20
0
0.5 1 1.5 42 2.5 3 3.5
3112 G25
V
IN
= 2.7V
V
IN
= 5V
V
IN
= 12V
LOAD CURRENT (A)
0
TEMPERATURE RISE (°C)
30
40
50
60
10
20
0
0.5 1 1.5 42 2.5 3 3.5
3112 G26
V
IN
= 5V
V
IN
= 12V
3112 G27
V
OUT
200mV/DIV
500µs/DIV
FRONT PAGE APPLICATION
INDUCTOR
CURRENT
1A/DIV
3112 G28
V
OUT
200mV/DIV
500µs/DIV
FRONT PAGE APPLICATION
INDUCTOR
CURRENT
1A/DIV
3112 G29
V
OUT
200mV/DIV
INDUCTOR
CURRENT
1A/DIV
500µs/DIV
FRONT PAGE APPLICATION
3V
IN
to 5V
OUT
0.1A to 0.6A Load Step
5V
IN
to 5V
OUT
0.1A to 1.0A Load Step
12V
IN
to 5V
OUT
0.1A to 1.0A Load Step
5V
IN
to 5.0V
OUT
Burst to PWM Waveforms,
3112 G30
V
OUT
500mV/DIV
INDUCTOR
CURRENT
500mA/DIV
PWM/SYNC
5V/DIV
100µs/DIV
100mA LOAD
C
OUT
= 47µF