LT3753EFE ......................................... –40°C to 125°C
LT3753IFE .......................................... –40°C to 125°C
LT3753HFE ........................................ –40°C to 150°C
LT3753MPFE ..................................... –55°C to 150°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 Sec) .................. 300°C
OVLO 10
T
AO
11
T
AS
12
T
OS
13
T
BLNK
14
NC 15
NC 16
SS2 17
GND 18
PGND 19
FE PACKAGE
VARIATION: FE38(31)
38-LEAD PLASTIC TSSOP
θ
JA
= 25°C/W
EXPOSED PAD (PIN 39) IS PGND AND GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LT3753EFE#PBF
LT3753IFE#PBF
LT3753HFE#PBF
LT3753MPFE#PBF
TAPE AND REEL
LT3753EFE#TRPBF
LT3753IFE#TRPBF
LT3753HFE#TRPBF
LT3753MPFE#TRPBF
PART MARKING*
LT3753FE
LT3753FE
LT3753FE
LT3753FE
PACKAGE DESCRIPTION
38-Lead Plastic TSSOP
38-Lead Plastic TSSOP
38-Lead Plastic TSSOP
38-Lead Plastic TSSOP
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–55°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 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/
3753fa
For more information
www.linear.com/LT3753
3
LT3753
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 12V, UVLO_V
SEC
= 2.5V.
PARAMETER
Operational Input Voltage
V
IN(ON)
V
IN(OFF)
V
IN(ON/OFF)
Hysteresis
V
IN
Quiescent Current
UVLO_V
SEC
Micropower Threshold (V
SD
)
V
IN
Shutdown Current (Micropower)
UVLO_V
SEC
Threshold (V
SYS_UV
)
V
IN
Shutdown Current (After Soft-Stop)
UVLO_V
SEC
(ON) Current
UVLO_V
SEC
(OFF) Current
Hysteresis Current
With One-Shot Communication Current
OVLO (Rising) (No Switching, Reset SS1)
OVLO (Falling) (Restart SS1)
OVLO Hysteresis
OVLO Pin Current (Note 10)
Oscillator
Frequency: f
OSC
= 100kHz
Frequency: f
OSC
= 300kHz
Frequency: f
OSC
= 500kHz
f
OSC
Line Regulation
Frequency and D
VSEC
Foldback Ratio (Fold)
SYNC Input High Threshold
SYNC Input Low Threshold
SYNC Pin Current
SYNC Frequency/Programmed f
OSC
Linear Regulator (INTV
CC
)
INTV
CC
Regulation Voltage
Dropout (V
IN
-INTV
CC
)
INTV
CC
UVLO(+)
INTV
CC
UVLO(–)
INTV
CC
UVLO Hysteresis
INTV
CC
OVLO(+)
INTV
CC
OVLO(–)
INTV
CC
OVLO Hysteresis
INTV
CC
Current Limit
INTV
CC
= 0V
INTV
CC
= 8.75V
l
l
l
ELECTRICAL CHARACTERISTICS
CONDITIONS
l
l
MIN
8.5
TYP
7.75
7.42
MAX
100
8.4
0.55
7.5
0.6
40
1.320
220
UNITS
V
V
V
V
mA
V
µA
V
µA
µA
0.11
0.2
1.180
0.33
5.9
0.4
20
1.250
165
0
FB = 1.5V (Not Switching)
I
VIN
< 20µA
UVLO_V
SEC
= 0.2V
l
l
UVLO_V
SEC
= 1V
UVLO_V
SEC
= V
SYS_UV
+ 50mV
UVLO_V
SEC
= V
SYS_UV
– 50mV
l
(Note 13)
l
4.0
1.220
23
5
25
1.250
1.215
35
5
0.9
5
6.0
1.280
47
100
100
106
321
530
0.1
1.8
µA
µA
V
V
mV
nA
mA
nA
kHz
kHz
kHz
%/V
V
V
µA
OVLO = 0V
OVLO = 1.5V (SS1 = 2.7V)
OVLO = 1.5V (SS1 = 1.0V)
R
T
= 82.5k
R
T
= 24.9k
R
T
= 14k
R
T
= 24.9k, 8.5V < V
IN
< 100V
SS1 = V
SSACT
+ 25mV, SS2 = 2.7V
(Note 4)
(Note 4)
SYNC = 6V
1.0
9.4
V
IN
= 8.75V, I
INTVCC
= 10mA
(Start Switching)
(Stop Switching)
0.1
(Stop Switching)
(Start Switching)
15.9
15.4
0.38
9.5
19
l
l
l
94
279
470
100
300
500
0.05
4
1.2
0.6
1.025
75
1.25
10
0.6
7
6.8
0.2
16.5
16
0.5
13
27
7.4
7.2
0.3
17.2
16.7
0.67
17
32
10.4
kHz/kHz
V
V
V
V
V
V
V
V
mA
mA
4
3753fa
For more information
www.linear.com/LT3753
LT3753
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
嵌入式系统
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