LT3669 View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LT3669 Datasheet PDF : 40 Pages
| |||
LT3669/LT3669-2
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT3669EUFD#PBF
LT3669EUFD#TRPBF
3669
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LT3669IUFD#PBF
LT3669IUFD#TRPBF
3669
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LT3669HUFD#PBF
LT3669HUFD#TRPBF 3669
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 150°C
LT3669EUFD-2#PBF
LT3669EUFD-2#TRPBF 36692
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LT3669IUFD-2#PBF
LT3669IUFD-2#TRPBF 36692
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LT3669HUFD-2#PBF
LT3669HUFD-2#TRPBF 36692
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 150°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 non-standard 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, VL+ = 24V. (Note 4)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Power Supply
VOVTH
L+ Undervoltage Lockout Threshold
L+ Overvoltage Lockout Threshold
Shutdown Current from L+
Quiescent Current from L+
VL+ Rising
VL+ Rising
VEN/UVLO = 0.4V
Not Switching
l
6.4
7.5
V
l 40.5
43
45
V
1.15 1.65
mA
4
6
mA
Switching Regulator
VFBOUT
Switching Regulator Feedback Voltage
FBOUT Pin Bias Current
FBOUT Voltage Line Regulation
Switching Frequency
Minimum Switch Off-Time
Foldback Frequency
Switch Current Limit (Note 6)
FBOUT Pin Voltage = 800mV
7.5V < VL+ < 40V
RT = 5.36k
RT = 19.1k
RT = 107k
RT = 19.1k
RT = 19.1k, FBOUT = 0V
LT3669
LT3669-2
l 777
794
811
mV
l
–15 –100
nA
0.005
%/V
1.94 2.28 2.62
MHz
0.88 1.04 1.20
MHz
219
258
297
kHz
l
130
210
ns
115
kHz
l 240
325
410
mA
l 480
650
820
mA
Switch VCESAT (VDIO – VSW)
Switch Leakage Current
ISW = –100mA (LT3669)
ISW = –300mA (LT3669-2)
330
mV
550
mV
0.01
2
µA
Catch Schottky Diode Forward Voltage Drop
Catch Schottky Diode Current Limit to Stop
Internal Oscillator
ISW = –100mA (LT3669)
LT3669
LT3669-2
720
mV
140
200
260
mA
330
450
570
mA
Reverse Protection Diode Forward
Voltage Drop
Reverse Protection Diode Reverse Leakage
Boost Schottky Diode Forward Voltage Drop
Boost Schottky Diode Reverse Leakage
Minimum BST Voltage (Note 7)
IDIO = –100mA (LT3669)
IDIO = –300mA (LT3669-2)
VL+ = 0V, VDI0 = 24V
IBST = –6mA (LT3669)
IBST = –15mA (LT3669-2)
VBST – VBD = 24V
720
mV
840
mV
0.01
2
µA
700
mV
750
mV
0.01
2
µA
1.4
1.8
V
3669fa
For more information www.linear.com/LT3669
3
Share Link: 