LTC3564_15 Datasheet, PDF (4/20 Pages) Linear Technology – 2.25MHz, 1.25A Synchronous Step-Down Regulator

LTC3564
TYPICAL PERFOR A CE CHARACTERISTICS T_A = 25°C, V_IN = 3.6V, unless otherwise specified.
Efficiency vs Input Voltage
100
I_OUT = 100mA
90
80 IOUT = 1.25A
I_OUT = 10mA _{IOUT = 1mA}
70
60
50
40
2.5
I_OUT = 0.1mA
V_OUT = 1.8V
3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
3564 G01
Reference Voltage vs
Temperature
615
610
605
600
595
590
585
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3564 G04
Efficiency vs Output Current
100
V_OUT = 1.2V
90
80
70
60
50
40
30
20
10
0
0.1
V_IN = 2.7V
V_IN = 3.6V
V_IN = 4.2V
1
10 100 1000 10000
OUTPUT CURRENT (mA)
3564 G02
Oscillator Frequency vs
Temperature
2.40
2.35
2.30
2.25
2.20
2.15
2.10
2.05
2.00
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3564 G05
Efficiency vs Output Current
100
V_OUT = 1.5V
90
80
70
60
50
40
30
20
10
0
0.1
V_IN = 2.7V
V_IN = 3.6V
V_IN = 4.2V
1
10 100 1000 10000
OUTPUT CURRENT (mA)
3564 G04
Frequency Variation vs V_IN
6
4
2
0
–2
–4
–6
–8
2.5 3.0
3.5 4.0 4.5
V_IN (V)
5.0 5.5
3564 G06
Load Regulation
1.00 _{VOUT = 1.8V}
0.75
0.50
0.25
0
–0.25
–0.50
0 200 400 600 800 1000 1200 1400
OUTPUT CURRENT (mA)
3564 G07
Line Regulation
0.6
V_OUT = 1.8V
I_LOAD = 400mA
0.4
0.2
0
–0.2
–0.4
–0.6
2.5
3.0 3.5 4.0 4.5
INPUT VOLTAGE (V)
5.0 5.5
3564 G08
4
R_DS(ON) vs Input Voltage
0.25
0.20
MAIN SWITCH
0.15
0.10
SYNCHRONOUS SWITCH
0.05
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
3564 G09
3564f