LTC3112_15 Datasheet, PDF (4/32 Pages) Linear Technology – 15V, 2.5A Synchronous Buck-Boost DC/DC Converter

LTC3112
Electrical Characteristics
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.
Typical Performance Characteristics
T_A = 25°C, V_IN = 5.0V, V_OUT = 5.0V unless otherwise specified
Wide V_IN to 5V_OUT Efficiency
100
PWM
90
BURST
80
70
60
50
40
30
0.0001 0.001 0.01 0.1
LOAD CURRENT (A)
2.7V_IN
5.0V_IN
12V_IN
1
3112 G01a
Wide V_IN to 5V_OUT Power Loss
1
PWM
0.1
0.01
BURST
0.001
0.0001
0.0001
2.7V_IN LOSS
5.0V_IN LOSS
12V_IN LOSS
0.001 0.01 0.1
1
LOAD CURRENT (A)
3112 G01b
Wide V_IN to 3.3V_OUT Efficiency
100
PWM
90
BURST
80
70
60
50
40
30
0.0001 0.001 0.01 0.1
LOAD CURRENT (A)
2.7V_IN
5.0V_IN
12V_IN
1
3112 G02a
Wide V_IN to 3.3V_OUT Power Loss
PWM
1
0.1
0.01
BURST
0.001
0.0001
0.0001
2.7V_IN LOSS
5.0V_IN LOSS
12V_IN LOSS
0.001 0.01 0.1
1
LOAD CURRENT (A)
3112 G02b
Wide V_IN to 12V_OUT Efficiency
100
PWM
90
BURST
80
70
60
50
40
30
0.0001 0.001 0.01 0.1
LOAD CURRENT (A)
3.6V_IN
5.0V_IN
12V_IN
1
3112 G03a
Wide V_IN to 12V_OUT Power Loss
1
PWM
0.1
0.01
BURST
0.001
0.0001
0.0001
3.6V_IN LOSS
5.0V_IN LOSS
12V_IN LOSS
0.001 0.01 0.1
1
LOAD CURRENT (A)
3112 G03b
3112fc
4
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