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LTC3112_15 Datasheet, PDF (7/32 Pages) Linear Technology – 15V, 2.5A Synchronous Buck-Boost DC/DC Converter
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LTC3112
Typical Performance Characteristics
TA = 25°C, VIN = 5.0V, VOUT = 5.0V unless otherwise specified
IOUT Voltage vs VOUT
2500
IOUT Voltage
vs VIN and Switching Frequency
2500
2000
1500
IOUT = 2A
IOUT = 1.5A
2000
1500
2A, 1500kHz
2A, 750kHz
2A, 300kHz
1000
IOUT = 1A
IOUT = 500mA
500
RIOUT = 42.2k, CIOUT = 100pF,
VIN = 7.5V, 750kHz
0
2 3 4 5 6 7 8 9 10 11 12 13 14
VOUT (V)
3112 G22
1000
500
1A, 1500kHz
1A, 750kHz
1A, 300kHz
RIOUT = 42.2k, CIOUT = 100pF,
VOUT = 5V, 750kHz
0
2 3 4 5 6 7 8 9 10 11 12 13 14 15
VIN (V)
3112 G23
5VOUT Die Temperature Rise
vs Continuous Load Current
4 Layer Demo Board at 25°C
60
12VOUT Die Temperature Rise
vs Continuous Load Current
4 Layer Demo Board at 25°C
60
3.3VOUT Die Temperature Rise
vs Continuous Load Current
4 Layer Demo Board at 25°C
60
50
40
30
20
10
VIN = 2.7V
VIN = 5V
0
VIN = 12V
0 0.5 1 1.5 2 2.5 3 3.5 4
LOAD CURRENT (A)
3112 G24
3VIN to 5VOUT
0.1A to 0.6A Load Step
50
50
VOUT
200mV/DIV
40
40
30
30
20
10
VIN = 2.7V
VIN = 5V
0
VIN = 12V
0 0.5 1 1.5 2 2.5 3 3.5 4
LOAD CURRENT (A)
3112 G25
20
10
VIN = 5V
VIN = 12V
0
0 0.5 1 1.5 2 2.5 3 3.5 4
LOAD CURRENT (A)
3112 G26
INDUCTOR
CURRENT
1A/DIV
500µs/DIV
FRONT PAGE APPLICATION
3112 G27
5VIN to 5VOUT
0.1A to 1.0A Load Step
12VIN to 5VOUT
0.1A to 1.0A Load Step
5VIN to 5.0VOUT
Burst to PWM Waveforms,
VOUT
200mV/DIV
VOUT
200mV/DIV
VOUT
500mV/DIV
PWM/SYNC
5V/DIV
INDUCTOR
CURRENT
1A/DIV
500µs/DIV
FRONT PAGE APPLICATION
INDUCTOR
CURRENT
1A/DIV
3112 G28
500µs/DIV
FRONT PAGE APPLICATION
INDUCTOR
CURRENT
500mA/DIV
3112 G29
100mA LOAD
COUT = 47µF
100µs/DIV
For more information www.linear.com/LTC3112
3112 G30
3112fc
7
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