LTC3526EDC Datasheet, PDF (5/16 Pages) Linear Technology – 500mA 1MHz Synchronous Step-Up DC/DC Converters in 2mm X 2mm DFN

Typical Performance Characteristics
LTC3526/LTC3526B
V_FB vs Temperature
0.50
NORMALIZED TO 25°C
0.25
0
–0.25
–0.50
–0.75
–1.00
–60 –40 –20 0 20 40 60
TEMPERATURE (°C)
80 100
3526 G13
Fixed Frequency Switching
Waveform and V_OUT Ripple
Start-Up Voltage vs Temperature
1.00
LOAD = 1mA
0.95
0.90
0.85
0.80
0.75
0.70
–50 –30 –10 10 30 –50
TEMPERATURE (°C)
70 90
3526 G14
Burst Mode Waveforms
Burst Mode Current vs V_OUT
10.0
9.5
9.0
8.5
8.0
7.5
7.0
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
V_OUT (V)
3526 G15
V_OUT and I_IN During Soft-Start
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
SW PIN
2V/DIV
V_OUT
20mV/DIV
AC-COUPLED
3526 G16
INDUCTOR
CURRENT
0.2A/DIV
V_IN = 1.2V
V_OUT = 3.3V
C_OUT = 10µF
10µs/DIV
V_OUT
1V/DIV
INPUT
CURRENT
0.2A/DIV
SHDN PIN
1V/DIV
3526 G17
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
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