LTC3547B_15 Datasheet, PDF (4/16 Pages) Linear Technology – Dual Monolithic 300mA Synchronous Step-Down Regulator

LTC3547B
TYPICAL PERFOR A CE CHARACTERISTICS
Oscillator Frequency
vs Temperature
2.6
2.5
2.4
V_IN = 4.2V
2.3
V_IN = 3.6V
2.2
V_IN = 2.7V
2.1
2.0
1.9
1.8
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3547b G04
Reference Voltage
vs Temperature
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–50
–25 0 25 50
TEMPERATURE (°C)
75 100
3547b G07
Switch Leakage vs Temperature
50
40
30
20
SYNCHRONOUS
SWITCH
10
MAIN SWITCH
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3547b G05
R_DS(ON) vs Input Voltage
1.0
MAIN SWITCH
0.9
0.8
0.7 SYNCHRONOUS
SWITCH
0.6
0.5
0.4
2.5 3 3.5 4 4.5 5 5.5 6
V_IN (V)
3547b G08
Switch Leakage vs Input Voltage
500
400
300
SYNCHRONOUS
SWITCH
200
100
MAIN SWITCH
0
2.5 3 3.5 4 4.5 5 5.5 6
V_IN (V)
3547b G06
R_DS(ON) vs Temperature
1.3
V_IN = 2.7V
1.2
1.1
1.0
V_IN = 3.6V
0.9
0.8
0.7
0.6
0.5 _{VIN = 4.2V}
0.4
–50 –25 0
MAIN SWITCH
SYNCHRONOUS
SWITCH
25 50 75 100 125
TEMPERATURE (°C)
3547b G09
4
Efficiency vs Load 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
OUTPUT CURRENT (mA)
1000
3547b G10
Efficiency vs Load Current
100
V_OUT = 1.8V
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
OUTPUT CURRENT (mA)
1000
3547b G11
3547bfb