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LT1308BCF Datasheet(PDF) 3 Page - Linear Technology

Part # LT1308BCF
Description  High Current, Micropower Single Cell, 600kHz DC/DC Converters
PDF  12 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1308BCF Datasheet(HTML) 3 Page - Linear Technology

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LT1308A/LT1308B
ELECTRICAL C
C
HARA TERISTICS
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
Industrial Grade – 40
°C to 85°C. VIN = 1.2V, VSHDN = VIN, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IQ
Quiescent Current
Not Switching, LT1308A
q
140
240
µA
Switching, LT1308B
q
2.5
4
mA
VSHDN = 0V (LT1308A/LT1308B)
q
0.01
1
µA
VFB
Feedback Voltage
q
1.19
1.22
1.25
V
IB
FB Pin Bias Current
(Note 3)
q
27
80
nA
Reference Line Regulation
1.1V
≤ VIN ≤ 2V
q
0.05
0.4
%/V
2V
≤ VIN ≤ 10V
q
0.01
0.2
%/V
Minimum Input Voltage
0.92
1
V
gm
Error Amp Transconductance
∆I = 5µA60
µmhos
AV
Error Amp Voltage Gain
100
V/V
fOSC
Switching Frequency
q
500
600
750
kHz
Maximum Duty Cycle
q
82
90
%
Switch Current Limit
Duty Cyle = 30% (Note 4)
2
3
4.5
A
Switch VCESAT
ISW = 2A (25°C, – 40°C), VIN = 1.5V
290
350
mV
ISW = 2A (85°C), VIN = 1.5V
330
400
mV
Burst Mode Operation Switch Current Limit
VIN = 2.5V, Circuit of Figure 1
400
mA
(LT1308A)
Shutdown Pin Current
VSHDN = 1.1V
q
2
5
µA
VSHDN = 6V
q
20
35
µA
VSHDN = 0V
0.01
0.1
µA
LBI Threshold Voltage
196
200
204
mV
q
193
200
207
mV
LBO Output Low
ISINK = 50µA
q
0.1
0.25
V
LBO Leakage Current
VLBI = 250mV, VLBO = 5V
q
0.01
0.1
µA
LBI Input Bias Current (Note 5)
VLBI = 150mV
33
100
nA
Low-Battery Detector Gain
3000
V/V
Switch Leakage Current
VSW = 5V
q
0.01
10
µA
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
Commercial Grade 0
°C to 70°C. VIN = 1.1V, VSHDN = VIN, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Shutdown Pin Current
VSHDN = 1.1V
q
25
µA
VSHDN = 6V
q
20
35
µA
VSHDN = 0V
q
0.01
0.1
µA
LBI Threshold Voltage
196
200
204
mV
q
194
200
206
mV
LBO Output Low
ISINK = 50µA
q
0.1
0.25
V
LBO Leakage Current
VLBI = 250mV, VLBO = 5V
q
0.01
0.1
µA
LBI Input Bias Current (Note 5)
VLBI = 150mV
33
100
nA
Low-Battery Detector Gain
3000
V/V
Switch Leakage Current
VSW = 5V
q
0.01
10
µA



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