LT1339ISW 查看數據表（PDF） - Linear Technology
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LT1339ISW Datasheet PDF : 20 Pages
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LT1339
ELECTRICAL CHARACTERISTICS
12VIN = VBOOST = 12V, VC = 2V, TS = 0V, VFB = VREF = 1.25V, CTG = CBG = 3000pF, TA = 25°C unless otherwise noted.
SYMBOL PARAMETER
Error Amplifier
VFB
Error Amplifier Reference Voltage
IFB
Feedback Input Current
gm
Error Amplifier Transconductance
AV
Error Amplifier Voltage Gain
IVC
Error Amplifier Source Current
Error Amplifier Sink Current
VVC
VSENSE
Absolute VC Clamp Voltage
Peak Current Limit Threshold
Average Current Limit Threshold (Note 4)
VIAVG
Average Current Limit Threshold
Current Sense Amplifier
AV
Amplifier DC Gain
VOS
Amplifier Input Offset Voltage
IB
Input Bias Current
Oscillator
fO
Operating Frequency, Free Run
Frequency Programming Error (Note 3)
ICT
Timing Capacitor Discharge Current
VSYNC
SYNC Input Threshold
fSYNC
SYNC Frequency Range
Output Drivers
VTG,BG
Undervoltage Output Clamp
Standby Mode Output Clamp
VTG
Top Gate On Voltage
Top Gate Off Voltage
tTGR
Top Gate Rise Time
tTGF
Top Gate Fall Time
VBG
Bottom Gate On Voltage
Bottom Gate Off Voltage
tBGR
Bottom Gate Rise Time
tBGF
Bottom Gate Fall Time
CONDITIONS
Measured at Feedback Pin
VFB = VREF
VFB – VREF = 500mV
Measured at VC Pin
Measured at Sense Inputs
Measured at Sense Inputs
Measured at IAVG Pin
Measured at IAVG Pin
2V < VCMSENSE < 60V,
SENSE+ – SENSE– = 5mV
Sink (VCMSENSE > 5V)
Source (VCMSENSE = 0V)
fO ≤ 150kHz
LT1339C
LT1339I
Rising Edge
fSYNC ≤ 150kHz
12VIN ≤ 8V
VRUN < 0.5V
MIN
TYP
MAX UNITS
1.242
q 1.235
q 0.1
q 1200
q 1500
q 200
q 280
q 170
q 110
1.250
1.250
0.5
2000
3000
275
400
3.5
190
120
2.5
1.258
1.265
1.0
3200
130
V
V
µA
µmho
V/V
µA
µA
V
mV
mV
V
q 0.1
q
q
15
V/V
mV
45
75
µA
700
1200
µA
q
q –5
150
kHz
5
%
q 2.20
2.50
2.75
mA
q 2.10
2.50
2.75
mA
q 0.8
2.0
V
q fO
1.4fO
q
0.4
0.7
V
q
0.1
V
q 11.0
11.9
12.0
V
q
0.4
0.7
V
q
130
200
ns
q
60
140
ns
q 11.0
11.9
12.0
V
q
0.4
0.7
V
q
70
200
ns
q
60
140
ns
The q denotes specifications which apply over the full operating
temperature range.
Note 1: Absolute maximum ratings are those values beyond which the life
of a device may be impaired.
Note 2: Supply current specification does not include external FET gate
charge currents. Actual supply currents will be higher and vary with
operating frequency, operating voltages and the type of external FETs
used. See Application Information section.
Note 3: Test condition: RCT = 16.9k, CCT = 1000pF.
Note 4: Test Condition: VCMSENSE = 10V.
3
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