LTC3526 Linear Technology, LTC3526 Datasheet - Page 5

• Manufacturer Part Number: LTC3526
• Description: 500mA 1MHz Synchronous Step-Up DC/DC Converters
• Manufacturer: Linear Technology

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TYPICAL PERFORMANCE CHARACTERISTICS
AC COUPLED
10mV/DIV
–0.25
–0.75
–1.00
–0.50
0.50
0.25
SW PIN
2V/DIV
0
V
–60
OUT
V
NORMALIZED TO 25°C
FB
–40
Fixed Frequency Switching
Waveform and V
V
V
C
vs Temperature
IN
OUT
OUT
= 1.2V
–20
= 3.3V AT 100mA
= 10μF
AC COUPLED
TEMPERATURE (°C)
100mV/DIV
50mA/DIV
CURRENT
0
LOAD
V
OUT
20
500ns/DIV
Load Step Response (from Burst
Mode Operation)
OUT
V
V
20mA TO 170mA STEP
C
40
IN
OUT
OUT
= 3.6V
Ripple
= 5V
= 10μF
60
80
3526 G13
100μs/DIV
100
3526 G16
AC COUPLED
INDUCTOR
1.00
0.95
0.90
0.85
0.80
0.75
0.70
20mV/DIV
CURRENT
0.2A/DIV
SW PIN
2V/DIV
–50
V
OUT
Start-Up Voltage vs Temperature
–30
Burst Mode Waveforms
V
V
C
3526 G19
IN
OUT
OUT
= 1.2V
–10
= 3.3V
= 10μF
TEMPERATURE (°C)
10
10μs/DIV
30
–50
AC COUPLED
LOAD = 1mA
100mV/DIV
50mA/DIV
CURRENT
70
LOAD
V
OUT
3526 G14
Load Step Response
(Fixed Frequency)
90
V
V
50mA TO 150mA STEP
C
3526 G17
IN
OUT
OUT
= 3.6V
LTC3526/LTC3526B
= 5V
= 10μF
SHDN PIN
CURRENT
0.2A/DIV
10.0
1V/DIV
1V/DIV
INPUT
9.5
9.0
8.5
8.0
7.5
7.0
V
OUT
1.5
100μs/DIV
Burst Mode Current vs V
V
C
V
OUT
OUT
2.0
OUT
= 3.3V
= 10μF
and I
2.5
IN
3.0
V
OUT
200μs/DIV
During Soft-Start
(V)
3.5
3526 G20
4.0
OUT
4.5
3526 G15
3526bfb
3526 G18
5
5.0