LT3752EFE, LT3752EFE-1 .................. –40°C to 125°C
LT3752IFE, LT3752IFE-1 .................... –40°C to 125°C
LT3752HFE, LT3752HFE-1 ................. –40°C to 150°C
LT3752MPFE, LT3752MPFE-1 ............ –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
LT3752EFE#PBF
LT3752IFE#PBF
LT3752HFE#PBF
LT3752MPFE#PBF
LT3752EFE-1#PBF
LT3752IFE-1#PBF
LT3752HFE-1#PBF
LT3752MPFE-1#PBF
TAPE AND REEL
LT3752EFE#TRPBF
LT3752IFE#TRPBF
LT3752HFE#TRPBF
LT3752MPFE#TRPBF
LT3752EFE-1#TRPBF
LT3752IFE-1#TRPBF
LT3752HFE-1#TRPBF
LT3752MPFE-1#TRPBF
PART MARKING*
LT3752FE
LT3752FE
LT3752FE
LT3752FE
LT3752FE-1
LT3752FE-1
LT3752FE-1
LT3752FE-1
PACKAGE DESCRIPTION
38-Lead Plastic TSSOP
38-Lead Plastic TSSOP
38-Lead Plastic TSSOP
38-Lead Plastic TSSOP
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
–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/
3752fb
For more information
www.linear.com/LT3752
3
LT3752/LT3752-1
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 (LT3752)
Operational Input Voltage (LT3752-1)
V
IN(ON)
(LT3752)
V
IN(OFF)
(LT3752)
V
IN(ON/OFF)
Hysteresis (LT3752)
V
IN(ON)
(LT3752-1)
V
IN(OFF)
(LT3752-1)
V
IN(ON/OFF)
Hysteresis (LT3752-1)
V
IN
Start-Up Current (LT3752-1)
V
IN
Quiescent Current (Housekeeping Controller
Only) (LT3752)
V
IN
Quiescent Current (Housekeeping Controller
Only) (LT3752-1)
V
IN
Quiescent Current (Housekeeping Controller +
Forward Controller)
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 (Forward Controller: OUT, SOUT, AOUT)
Frequency: f
OSC
= 100kHz
Frequency: f
OSC
= 300kHz
Frequency: f
OSC
= 500kHz
f
OSC
Line Regulation
Frequency and D
VSEC
Foldback Ratio (LT3752) (Fold)
SYNC Input High Threshold
SYNC Input Low Threshold
SYNC Pin Current
SYNC Frequency/Programmed f
OSC
Linear Regulator (INTV
CC
) (LT3752)
INTV
CC
Regulation Voltage
Dropout (V
IN
-INTV
CC
)
INTV
CC
UVLO(+)
V
IN
= 6.5V, I
INTVCC
= 10mA
(Start Switching)
6.6
7
0.8
4.75
5
7.2
V
V
V
3752fb
ELECTRICAL CHARACTERISTICS
CONDITIONS
l
l
l
MIN
6.5
10.5
TYP
MAX
100
16
UNITS
V
V
V
V
V
V
V
V
µA
mA
mA
mA
V
µA
V
µA
µA
5.8
5.5
0.1
0.3
9.5
7.6
1.61
1.9
170
4
3
7.5
6.4
5.9
0.5
10.4
2.19
265
6.2
4.6
9.5
0.6
40
1.320
220
l
l
l
(Notes 6, 7)
HCOMP = 1V (Housekeeping Not Switching),
HFB = 0.85V
HCOMP = 1V (Housekeeping Not Switching),
HFB = 0.85V
HCOMP = 1V (Housekeeping Not Switching),
HFB = 1.35V, FB = 1.5V (Main Loop Not Switching)
I
VIN
< 20µA
UVLO_V
SEC
= 0.2V
l
l
l
l
0.2
1.180
0.4
20
1.250
165
0
l
UVLO_V
SEC
= 1V
UVLO_V
SEC
= V
SYS_UV
+ 50mV
UVLO_V
SEC
= V
SYS_UV
– 50mV
l
(Note 15)
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
0.1
µA
µA
V
V
mV
nA
mA
nA
kHz
kHz
kHz
%/V
%/V
l
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
6.5V < V
IN
< 100V (LT3752)
10.5V < V
IN
< 16V (LT3752-1)
SS1 = V
SSACT
+ 25mV, SS2 = 2.7V
(Note 4)
(Note 4)
SYNC = 6V
1.0
l
l
l
94
279
470
100
300
500
0.05
0.05
4
2
1.2
Frequency and D
VSEC
Foldback Ratio (LT3752-1) (Fold) SS1 = V
SS1ACT
+ 25mV, SS2 = 2.7V
0.6
1.8
V
V
µA
1.025
75
1.25
kHz/kHz
4
For more information
www.linear.com/LT3752
LT3752/LT3752-1
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
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