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LT1308 Datasheet(PDF) 3 Page - Linear Technology

Part # LT1308
Description  Single Cell High Current Micropower 600kHz Boost DC/DC Converter
PDF  8 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1308 Datasheet(HTML) 3 Page - Linear Technology

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LT1308
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Low-Battery Detector Gain
1M
Ω Load (25°C, 0°C)
1000
3000
V/V
1M
Ω Load (70°C)
500
V/V
Switch Leakage Current
VSW = 5V
q
0.01
10
µA
Reverse Battery Current
(Note 5)
750
mA
Commercial Grade 0
°C to 70°C. VIN = 1.1V, VSHDN = VIN, TA = 25°C unless otherwise noted.
ELECTRICAL C
C
HARA TERISTICS
Commercial Grade TA = – 20°C, VIN = 1.1V, VSHDN = VIN, unless otherwise noted (Note 1).
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IQ
Quiescent Current
VFB = 1.3V, Not Switching
80
160
µA
VSHDN = 0V
1
3
µA
VFB
Feedback Voltage
1.195
1.22
1.245
V
gm
Error Amp Transconductance
∆I = 5µA35
µmhos
AV
Error Amp Voltage Gain
100
V/V
fOSC
Switching Frequency
500
600
750
kHz
Maximum Duty Cycle
88
%
Switch VCESAT
ISW = 2A, VIN = 1.2V
300
350
mV
Shutdown Pin Current
VSHDN = VIN
2.5
4.0
µA
VSHDN = 0V
– 1.5
– 2.5
µA
LBI Threshold Voltage
180
200
220
mV
Industrial Grade – 40
°C to 85°C. VIN = 1.2V, VSHDN = VIN, TA = 25°C, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IQ
Quiescent Current
Not Switching
q
80
160
µA
VSHDN = 0V
q
13
µA
VFB
Feedback Voltage
q
1.195
1.22
1.245
V
IB
FB Pin Bias Current (Note 2)
VFB = VREF
q
27
80
nA
Reference Line Regulation
1.1V
≤ VIN ≤ 2V (–40°C)
0.6
1.1
%/V
1.1V
≤ VIN ≤ 2V (85°C)
1.5
%/V
2V
≤ VIN ≤ 6V
q
0.3
0.8
%/V
Minimum Input Voltage (– 40
°C)
1.2
V
Input Voltage Range
q
1.2
6
V
gm
Error Amp Transconductance
∆I = 5µA40
µmhos
AV
Error Amp Voltage Gain
– 40
°C
100
V/V
85
°C
80
V/V
fOSC
Switching Frequency
VIN = 1.3V (– 40°C)
500
600
750
kHz
VIN = 1.3V (85°C)
500
600
750
kHz
Maximum Duty Cycle
– 40
°C80
88
95
%
85
°C75
%
Switch Current Limit (Note 3)
DC = 40%
q
2.0
2.5
A
DC = 80%
1.6
2
A
Switch VCESAT
ISW = 2A (– 40°C)
300
350
mV
ISW = 2A (85°C)
330
400
mV
Burst Mode Operation Switch Current Limit
L = 3.3
µH, VOUT = 3.3V
200
mA



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