LTC3526L_15 Datasheet, PDF (5/16 Pages) Linear Technology – 550mA 1MHz Synchronous Step-Up DC/DC Converters

LTC3526L/LTC3526LB
TYPICAL PERFORMANCE CHARACTERISTICS
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
3526l G13
Fixed Frequency Switching
Waveform and V_OUT Ripple
Start-Up Voltage vs Temperature
0.80
0.75
1mA LOAD
0.70
0.65
NO LOAD
0.60
0.55
0.50
–50 25 0 25 50 75 100
TEMPERATURE (°C)
3526l G14
Burst Mode Waveforms
(LTC3526L)
Burst Mode Quiesent Current
vs V_OUT (LTC3526L)
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)
3526l 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
3526l G16
INDUCTOR
CURRENT
0.2A/DIV
V_IN = 1.2V
V_OUT = 3.3V
C_OUT = 10µF
10µs/DIV
3526l G17
V_OUT
1V/DIV
INPUT
CURRENT
0.2A/DIV
SHDN PIN
1V/DIV
V_OUT = 3.3V
C_OUT = 10µF
200µs/DIV
3526l G18
Load Step Response (from Burst
Mode Operation) (LTC3526L)
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
3526l 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
3526l G20
3526lfc