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LT3473A Datasheet(PDF) 3 Page - Linear Technology

Part # LT3473A
Description  Micropower 1A Boost Converter with Schottky and Output Disconnect
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3473A Datasheet(HTML) 3 Page - Linear Technology

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3
LT3473/LT3473A
3473f
The
denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
VIN = 3V, SHDN = 3V, CTRL = 2V, unless otherwise specified.
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT3473EDD and LT3473AEDE are guaranteed to meet
performance specifications from 0°C to 70°C. Specifications over the
–40°C to 85°C operating temperature range are assured by design,
characterization and correlation with statistical process controls.
TYPICAL PERFOR A CE CHARACTERISTICS
Load Regulation (Feedback Taken
from CAP)
LOAD CURRENT (mA)
0
19.00
19.20
19.40
19.60
19.80
CAP
OUT
20.00
20.20
20
40
60
80
3473 G01
100
VIN = 3.6V
CTRL VOLTAGE (V)
0
0
0.2
0.6
0.8
1.0
1.4
0.2
1
1.4
3473 G02
0.4
1.2
0.8
1.8
2
0.4 0.6
1.2
1.6
CTRL VOLTAGE (V)
0
1.0
1.2
1.4
2
3473 G03
0.8
0.6
0.5
1
1.5
0.4
0.2
0
Feedback Voltage
PGOOD Threshold Voltage
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Switching Frequency
0.9
1.2
1.4
MHz
Maximum Duty Cycle
88
92
%
Switch Current Limit
1.2
A
Switch VCESAT
ISW = 100mA
45
mV
Switch Leakage Current
VSW = 5V
0.1
5
µA
Schottky Forward Drop
ID = 100mA
0.45
V
Schottky Leakage Current
CAP = 36V, SW = 0V
4
µA
Disconnect PNP Voltage Drop
IOUT = 100µA, CAP = 20V
80
mV
IOUT = 50mA, CAP = 20V
250
mV
Disconnect PNP Quiescent Current
CAP = 20V
1.2
µA
Disconnect PNP Leakage Current
SHDN = OUT = 0V, CAP = 20V
0.01
0.1
µA
LTC3473A Only
NPN1 Voltage Drop
INE1 = 1mA
0.8
V
NPN1 Beta
INE1 = 1mA
60
NPN2 Voltage Drop
INE2 = 1mA
0.8
V
NPN2 Beta
INE2 = 1mA
60
Note 3: Failure to correctly solder the Exposed Pad of the package to the
PC board will result in a thermal resistance much higher than 40°C.
TA = 25°C unless otherwise noted.


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