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LT3495 Datasheet(PDF) 3 Page - Linear Technology

Part # LT3495
Description  650mA/350mA Micropower Low Noise Boost Converter with Output Disconnect
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3495 Datasheet(HTML) 3 Page - Linear Technology

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LT3495/LT3495B/
LT3495-1/LT3495B-1
3
3495b1b1f
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LT3495/LT3495B/LT3495-1/LT3495B-1 are guaranteed to
meet performance specifications from 0°C to 125°C junction temperature.
Specifications over the –40°C to 125°C operating junction temperature
range are assured by design, characterization and correlation with
statistical process controls.
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 3V, VSHDN = VCC, unless otherwise noted. (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Switch Current Limit
LT3495-1/LT3495B-1
l
275
350
450
mA
Switch VCESAT
LT3495/LT3495B, ISW = 400mA
LT3495-1/LT3495B-1, ISW = 200mA
200
125
mV
mV
Switch Leakage Current
VSW = 5V
0.01
1
μA
PMOS Disconnect Current Limit
After Start-Up
During Start-Up
250
110
370
150
450
190
mA
mA
PMOS Disconnect VCAP – VOUT
IOUT = 50mA, VCAP = 15V
150
mV
VCAP – VOUT Clamp Voltage
8.7
V
SHDN Input Voltage High
1.5
V
SHDN Input Voltage Low
0.3
V
SHDN Pin Bias Current
VSHDN = 3V
VSHDN = 0V
5.3
0
8μA
μA
CTRL Pin Bias Current
VCTRL = 0.5V, Current Flows Out of Pin
l
20
100
nA
CTRL to FB Offset
VCTRL = 0.5V
6
14
mV
Maximum Shunt Current
LT3495/LT3495-1, VFB = 1.5V
230
μA
Note 3: Internal reference voltage is determined by finding VFB voltage
level which causes quiescent current to increase 150μA above “Not
Switching” level.
Note 4: If CTRL is overriding the internal reference, Start-Up mode occurs
when VFB is less then half the voltage on CTRL. If CTRL is not overriding
the internal reference, Start-Up mode occurs when VFB is less then half the
voltage of the internal reference.
TYPICAL PERFORMANCE CHARACTERISTICS T
A = 25°C unless otherwise noted.
Switching Frequency
vs Load Current
Load Regulation
VOUT vs CTRL Voltage
LOAD CURRENT (mA)
0
1000
800
400
200
600
0
80
40
3495 G01
120
60
20
100
VCC = 3.6V
VOUT = 16V
FIGURE 7 CIRCUIT
LOAD CURRENT (mA)
0
1.5
1.0
0.0
–0.5
–1.0
0.5
–1.5
80
40
3495 G02
120
60
20
100
VCC = 3.6V
VOUT = 16V
FIGURE 7 CIRCUIT
CTRL VOLTAGE (V)
0
18
15
9
6
3
12
0
1.2
0.6
3495 G03
1.5
0.9
0.3
FIGURE 7 CIRCUIT


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