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| LTC3547B_15 Datasheet, PDF (5/16 Pages) Linear Technology – Dual Monolithic 300mA Synchronous Step-Down Regulator | |||
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TYPICAL PERFOR A CE CHARACTERISTICS
LTC3547B
Efï¬ciency vs Load Current
100
VOUT = 2.5V
90
80
70
60
50
40
30
20
10
0
0.1
VIN = 2.7V
VIN = 3.6V
VIN = 4.2V
1
10
100
1000
OUTPUT CURRENT (mA)
3547b G12
Load Regulation
1.2 VIN = 3.6V
1.O
0.8
VOUT = 1.2V
VOUT = 1.8V
VOUT = 2.5V
0.6
PULSE SKIP MODE
OPERATION
0.4
0.2
0
â0.2
0 50 100 150 200 250 300 350
LOAD CURRENT (mA)
3547b G13
Line Regulation
0.6
VOUT = 1.8V
ILOAD = 100mA
0.4
0.2
0
â0.2
â0.4
â0.6
2.5 3 3.5 4 4.5 5 5.5
VIN (V)
3547b G14
Start-Up From Shutdown
Start-Up From Shutdown
Load Step
RUN
2V/DIV
VOUT
1V/DIV
IL
100mA/DIV
VIN = 3.6V
VOUT = 1.8V
ILOAD = 0A
200μs/DIV
RUN
2V/DIV
VOUT
1V/DIV
IL
200mA/DIV
3547b G15
VIN = 3.6V
VOUT = 1.8V
ILOAD = 300mA
250μs/DIV
VOUT,
AC-COUPLED
100mV/DIV
3547b G16
IL
200mA/DIV
ILOAD
200mA/DIV
10μs/DIV
VIN = 3.6V
VOUT = 1.8V
ILOAD = 0mA TO 300mA
3547b G17
Load Step
VOUT,
AC-COUPLED
100mV/DIV
IL
200mA/DIV
ILOAD
200mA/DIV
10μs/DIV
VIN = 3.6V
VOUT = 1.8V
ILOAD = 20mA TO 300mA
3547b G18
Load Step
VOUT,
AC-COUPLED
100mV/DIV
IL
200mA/DIV
ILOAD
200mA/DIV
10μs/DIV
VIN = 3.6V
VOUT = 1.8V
ILOAD = 50mA TO 300mA
3547b G19
3547bfb
5
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