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LTC3537 Datasheet(PDF) 3 Page - Linear Technology

Part # LTC3537
Description  2.2 MHz, 600mA Synchronous Step-Up DC/DC Converter and 100mA LDO
PDF  20 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3537 Datasheet(HTML) 3 Page - Linear Technology

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LTC3537
3
3537fa
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VINB = 1.2V, VOUTB = 3.3V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
RNMOS
NMOS Switch On Resistance
VOUTB = 1.8V
VOUTB = 3.3V
VOUTB = 5V
0.8
0.4
0.3
Ω
Ω
Ω
RPMOS
PMOS Switch On Resistance
VOUTB = 1.8V
VOUTB = 3.3V
VOUTB = 5V
1
0.6
0.4
Ω
Ω
Ω
ILIM
NMOS Current Limit
(Note 4)
l
600
750
mA
tLIMDELAY
Current Limit Delay Time to
Output
(Note 3)
40
ns
Max Duty Cycle
VFBB = 1.15V
l
87
92
%
Min Duty Cycle
VFBB = 1.3V
l
0%
fSW
Switching Frequency
l
2
2.2
2.4
MHz
VENBSTH
ENBST Input High Voltage
0.8
V
VENBSTL
ENBST Input Low Voltage
0.3
V
IENBSTIN
ENBST Input Current
VENBST = 5.5V
1.5
μA
VMODEH
MODE Input High Voltage
0.8
V
VMODEL
MODE Input Low Voltage
0.3
V
IMODEIN
MODE Input Current
VMODE = 5.5V
1.5
μA
tSS
Soft-Start Time
0.5
ms
VFBLBI
LBI Feedback Voltage
Falling Threshold
530
553
575
mV
LBI Hysteresis Voltage
35
mV
ILBIIN
LBI Input Current
VLBI = 1V
10
50
nA
VLBOLOW
LBO Voltage Low
ILBO = 5mA
200
mV
ILBOLEAK
LBO Leakage Current
VLBO = 5.5V
0.01
1
μA
VPGDBLOW
PGDB Voltage Low
IPGDB = 5mA
200
mV
IPGDBLEAK
PGDB Leakage Current
VPGDB = 5.5V
0.01
1
μA
PGDB Trip Point Voltage
VFBB Rising
94
% VOUTB
PGDB Hysteresis
6%
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
LDO Regulator
VINL
Input Voltage Range
1.8
5.5
V
VOLDO
Output Voltage Range
ILOAD = 100mA
VFBL
5V
IOUTMAX
Max Output Current
l
100
mA
VFBL
Feedback Voltage
l
590
600
610
mV
Line Regulation
VINL = 1.8V to 5.5V
0.1
%
Load Regulation
ILOAD = 10mA to 90mA
0.4
%
VDROPOUT
Dropout Voltage
IO = 50mA
100
mV
The
l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
VINL = 3.3V, VOLDO = 3V, unless otherwise noted.



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