LTC3537
7
3537fd
Fixed Frequency Switching
Waveform and V
OUTB
 Ripple
Burst Mode Waveforms
V
OUTB
 and I
INB
 During Soft-Start
TYPICAL PERFORMANCE CHARACTERISTICS
Load Current Step Response
(from Burst Mode Operation)
Load Current Step Response
(Fixed Frequency)
Load Current Step Response
(Fixed Frequency)
Load Current Step Response
(from Burst Mode Operation)
LDO Dropout Voltage vs
Load Current
T
A
 = 25癈 unless otherwise noted.
LOAD CURRENT (mA)
0
140
120
100
80
40
60
20
0
80
70
60
50
40
90
30
20
3537 G26
100
10
V
OUTB
20mV/DIV
I
L
10mA/DIV
V
INB
 = 2.4V
V
OUTB
 = 3.3V
C
OUTB
 = 10糉
3537 G20
10約/DIV
V
INB
 = 2.4V
V
OUTB
 = 3.3V
C
OUTB
 = 4.7糉
3537 G22
V
OUTB
100mV/
DIV
I
LOAD
100mA/
DIV
100約/DIV
V
INB
 = 2.4V
V
OUTB
 = 3.3V
C
OUTB
 = 4.7糉
3537 G23
I
LOAD
100mA/
DIV
V
OUTB
100mV/
DIV
100約/DIV
V
INB
 = 3.6V
V
OUTB
 = 5V
C
OUTB
 = 4.7糉
3537 G24
I
LOAD
100mA/
DIV
V
OUTB
100mV/
DIV
100約/DIV
V
INB
 = 3.6V
V
OUTB
 = 5V
C
OUTB
 = 4.7糉
3537 G25
I
LOAD
100mA/
DIV
V
OUTB
100mV/
DIV
100約/DIV
V
INB
 = 2.4V
V
OUTB
 = 3.3V
C
OUTB
 = 4.7糉
3537 G19
200ns/DIV
SW
2V/DIV
V
OUTB
20mV/
DIV
ENBST
V
OUTB
2V/DIV
I
VINB
200mA/
DIV
V
INB
 = 1.2V
V
OUTB
 = 3.3V
C
OUTB
 = 4.7糉
I
LOAD
 = 10mA
3537 G21
100約/DIV
LDO Input Ripple Rejection vs
Frequency
FREQUENCY (kHz)
3537 G29
60
50
40
30
20
10
0
0.01    0.1
1
10
100
V
INL
 = 3.3V
V
OLDO
 = 3V
C
OLDO
 = 4.7糉
I
LOAD
 = 50mA
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