LT3959EUHE-TRPBF データシートの表示（PDF） - Linear Technology
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LT3959EUHE-TRPBF
Linear Technology
LT3959EUHE-TRPBF Datasheet PDF : 26 Pages
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LT3959
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT3959EUHE#PBF
LT3959EUHE#TRPBF 3959
36-Lead (5mm × 6mm) Plastic QFN
–40°C to 125°C
LT3959IUHE#PBF
LT3959IUHE#TRPBF
3959
36-Lead (5mm × 6mm) Plastic QFN
–40°C to 125°C
LT3959EFE#PBF
LT3959EFE#TRPBF
LT3959FE
38-Lead Plastic TSSOP
–40°C to 125°C
LT3959IFE#PBF
LT3959IFE#TRPBF
LT3959FE
38-Lead Plastic TSSOP
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping
container. Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
Electrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C, VIN = 12V, EN/UVLO = 12V, INTVCC = 4.75V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIN Operating Voltage
VIN Start-Up Voltage
VIN Shutdown IQ
RT = 27.4kΩ, FBX = 0
EN/UVLO < 0.4V
EN/UVLO = 1.15V
l
1.6
l
40
V
2.5
2.65
V
0.1
1
µA
6
µA
VIN Operating IQ
DRIVE Shutdown Quiescent Current
EN/UVLO < 0.4V
EN/UVLO = 1.15V
350
450
µA
0.1
1
µA
0.1
2
µA
DRIVE Quiescent Current (Not Switching)
SW Pin Current Limit
RT = 27.4kΩ, DRIVE = 6V
l
6.0
2.0
2.5
mA
7.0
8.0
A
SW Pin On Voltage
SW Pin Leakage Current
ISW = 3A
SW = 40V
100
mV
5
µA
Error Amplifier
FBX Regulation Voltage (VFBX(REG))
FBX > 0V
FBX < 0V
l
1.580
1.6
1.620
V
l –0.815
–0.80
–0.785
V
FBX Pin Input Current
FBX = 1.6V
FBX = –0.8V
80
130
nA
–10
10
nA
Transconductance gm (∆IVC/∆VFBX)
VC Output Impedance
FBX Line Regulation [∆VFBX(REG)/(∆VIN • VFBX(REG))]
VC Source Current
VC Sink Current
Oscillator
FBX = VFBX(REG)
1.6V < VIN < 40V, FBX >0
1.6V < VIN < 40V, FBX <0
FBX = 0V, VC = 1.3V
FBX = 1.7V, VC = 1.3V
FBX = –0.85V, VC = 1.3V
240
µs
5
MΩ
0.02
0.05
%/V
0.02
0.05
%/V
–13
µA
13
µA
10
µA
Switching Frequency
RT Voltage
SW Minimum Off-Time
RT = 27.4k to SGND, VFBX = 1.6V l
250
RT = 86.6k to SGND, VFBX = 1.6V
RT = 6.81k to SGND, VFBX = 1.6V
FBX = 1.6V, –0.8V
300
340
kHz
100
kHz
1000
kHz
1.13
V
150
200
ns
SW Minimum On-Time
150
200
ns
For more information www.linear.com/LT3959
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