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