Datasheet

LTC3112
4
3112fc
For more information www.linear.com/LTC3112
Typical perForMance characTerisTics
Wide V
IN
to 3.3V
OUT
Power Loss
Wide V
IN
to 12V
OUT
Efficiency Wide V
IN
to 12V
OUT
Power Loss
Wide V
IN
to 5V
OUT
Efficiency Wide V
IN
to 5V
OUT
Power Loss Wide V
IN
to 3.3V
OUT
Efficiency
T
A
= 25°C, V
IN
= 5.0V, V
OUT
= 5.0V unless otherwise specified
elecTrical characTerisTics
LOAD CURRENT (A)
0.0001
EFFICIENCY (%)
100
70
80
50
60
90
30
40
0.01 10.1
3112 G01a
0.001
PWM
BURST
2.7V
IN
5.0V
IN
12V
IN
LOAD CURRENT (A)
0.0001
POWER LOSS (W)
1
0.01
0.1
0.0001
0.001
0.01 10.1
3112 G01b
0.001
2.7V
IN
LOSS
5.0V
IN
LOSS
12V
IN
LOSS
PWM
BURST
LOAD CURRENT (A)
0.0001
EFFICIENCY (%)
100
70
80
50
60
90
30
40
0.01 10.1
3112 G02a
0.001
PWM
BURST
2.7V
IN
5.0V
IN
12V
IN
LOAD CURRENT (A)
0.0001
POWER LOSS (W)
1
0.01
0.1
0.0001
0.001
0.01 10.1
3112 G02b
0.001
2.7V
IN
LOSS
5.0V
IN
LOSS
12V
IN
LOSS
PWM
BURST
LOAD CURRENT (A)
0.0001
EFFICIENCY (%)
100
70
80
50
60
90
30
40
0.01 10.1
3112 G03a
0.001
PWM
BURST
3.6V
IN
5.0V
IN
12V
IN
LOAD CURRENT (A)
0.0001
POWER LOSS (W)
1
0.01
0.1
0.0001
0.001
0.01 10.1
3112 G03b
0.001
3.6V
IN
LOSS
5.0V
IN
LOSS
12V
IN
LOSS
PWM
BURST
Note 3: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 150°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 4: Voltage transients on the switch pins beyond the DC limit specified
in the Absolute Maximum Ratings, are non disruptive to normal operation
when using good layout practices, as shown on the demo board or
described in the data sheet and application notes.
Note 5: I
OUT
current is tested in a non-switching DC state. In a switching
environment I
OUT
accuracy may exhibit variation with factors such as
switching frequency, load current, input/output voltage, and temperature.
See typical performance characteristic curves for predicted variation.
Note 6: The junction temperature (T
J
, in °C) is calculated from the ambient
temperature (T
A
, in °C) and power dissipation (P
D
, in Watts) according to
the formula:
T
J
= T
A
+ (P
D
• q
JA
), where q
JA
(in °C/W) is the package thermal
impedance.
Note 7: SYNC frequency range is tested with a square wave. Operation
with 100ns minimum high or low times is assured by design.