LTC3539-2 Linear Technology, LTC3539-2 Datasheet - Page 5

• Manufacturer Part Number: LTC3539-2
• Description: 1MHz/2MHz Synchronous Step-Up DC/DC Converters
• Manufacturer: Linear Technology

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TYPICAL PERFORMANCE CHARACTERISTICS
0.30
0.25
0.20
0.15
0.10
0.05
0.80
0.75
0.70
0.65
0.60
0.55
0.50
0
–50
1.5
Start-Up Voltage vs Temperature
R
DS(ON)
2.0
–25
2.5
vs V
AC-COUPLED
TEMPERATURE (°C)
200mA/DIV
0
50mV/DIV
CURRENT
3.0
OUT
NO LOAD
1mA LOAD
V
LOAD
NMOS
PMOS
OUT
V
3.5
OUT
25
(V)
V
V
C
I
Load Step, Fixed Frequency
LOAD
IN
OUT
OUT
4.0
50
= 2.4V
= 3.3V
= 22μF
= 100mA TO 250mA STEP
4.5
75
5.0
3539 G10
3539 G07
100
500μs/DIV
5.5
AC-COUPLED
500mA/DIV
INDUCTOR
20mV/DIV
CURRENT
SW PIN
2V/DIV
V
1.3
1.2
1.1
1.0
0.9
0.8
0.7
OUT
–50
R
Fixed Frequency SW and I
V
V
C
DS(ON)
IN
OUT
OUT
= 2.4V
3539 G14
–30
= 3.3V AT 400mA
= 22μF
Change vs Temperature
–10
TEMPERATURE (°C)
10
500ns/DIV
AC-COUPLED
200mA/DIV
30
50mV/DIV
CURRENT
LOAD
V
50
OUT
L(AC)
V
V
C
I
Load Step, Burst Mode Operation
LOAD
IN
OUT
OUT
70
= 2.4V
3539 G12
= 3.3V
= 22μF
3539 G08
= 20mA TO 170mA
90
LTC3539/LTC3539-2
AC-COUPLED
200mA/DIV
INDUCTOR
20mV/DIV
CURRENT
500μs/DIV
–0.25
–0.50
–0.75
–1.00
SW PIN
5V/DIV
0.50
0.25
V
0
OUT
–60
V
FB
V
V
C
Burst Mode SW and I
IN
OUT
OUT
–40
vs Temperature
= 3.3V
= 5V
= 22μF
–20
TEMPERATURE (°C)
3539 G15
0
5μs/DIV
20
40
L(AC)
60
80
3539 G09
5
3539 G13
3539f
100