EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
MSE PACKAGE
10-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 40°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LT3757EDD#PBF
LT3757IDD#PBF
LT3757EMSE#PBF
LT3757IMSE#PBF
LT3757HMSE#PBF
LT3757MPMSE#PBF
LT3757AEDD#PBF
LT3757AIDD#PBF
LT3757AEMSE#PBF
LT3757AIMSE#PBF
LT3757AHMSE#PBF
LT3757AMPMSE#PBF
TAPE AND REEL
LT3757EDD#TRPBF
LT3757IDD#TRPBF
LT3757EMSE#TRPBF
LT3757IMSE#TRPBF
LT3757HMSE#TRPBF
LT3757MPMSE#TRPBF
LT3757AEDD#TRPBF
LT3757AIDD#TRPBF
LT3757AEMSE#TRPBF
LT3757AIMSE#TRPBF
LT3757AHMSE#TRPBF
LT3757AMPMSE#TRPBF
PART MARKING*
LDYW
LDYW
LTDYX
LTDYX
LTDYX
LTDYX
LGGR
LGGR
LTGGM
LTGGM
LTGGM
LTGGM
PACKAGE DESCRIPTION
10-Lead (3mm
×
3mm) Plastic DFN
10-Lead (3mm
×
3mm) Plastic DFN
10-Lead (3mm
×
3mm) Plastic MSOP
10-Lead (3mm
×
3mm) Plastic MSOP
10-Lead (3mm
×
3mm) Plastic MSOP
10-Lead (3mm
×
3mm) Plastic MSOP
10-Lead (3mm
×
3mm) Plastic DFN
10-Lead (3mm
×
3mm) Plastic DFN
10-Lead (3mm
×
3mm) Plastic MSOP
10-Lead (3mm
×
3mm) Plastic MSOP
10-Lead (3mm
×
3mm) Plastic MSOP
10-Lead (3mm
×
3mm) Plastic MSOP
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–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 125°C
–40°C to 125°C
–40°C to 150°C
–55°C to 150°C
2
Rev. G
For more information
www.analog.com
LT3757/LT3757A
ORDER INFORMATION
LEAD FREE FINISH
AUTOMOTIVE PRODUCTS**
LT3757AEMSE#WPBF
LT3757AIMSE#WPBF
LT3757AHMSE#WPBF
LT3757AEMSE#WTRPBF
LT3757AIMSE#WTRPBF
LT3757AHMSE#WTRPBF
LTGGM
LTGGM
LTGGM
10-Lead (3mm × 3mm) Plastic MSOP
10-Lead (3mm × 3mm) Plastic MSOP
10-Lead (3mm × 3mm) Plastic MSOP
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Tape and reel specifications.
Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
**Versions
of this part are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. These
models are designated with a #W suffix. Only the automotive grade products shown are available for use in automotive applications. Contact your
local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for
these models.
The
l
denotes the specifications which apply over the full operating temp-
erature range, otherwise specifications are at T
A
= 25°C. V
IN
= 24V,
SHDN/UVLO
= 24V, SENSE = 0V, unless otherwise noted.
PARAMETER
V
IN
Operating Range
V
IN
Shutdown I
Q
V
IN
Operating I
Q
V
IN
Operating I
Q
with Internal LDO Disabled
SENSE Current Limit Threshold
SENSE Input Bias Current
Error Amplifier
FBX Regulation Voltage (V
FBX(REG)
)
FBX Overvoltage Lockout
FBX Pin Input Current
Transconductance g
m
(∆I
VC
/∆V
FBX
)
V
C
Output Impedance
V
FBX
Line Regulation [∆V
FBX
/(∆V
IN
• V
FBX(REG)
)]
V
C
Current Mode Gain (∆V
VC
/∆V
SENSE
)
V
C
Source Current
V
C
Sink Current
Oscillator
Switching Frequency
R
T
= 41.2k to GND, V
FBX
= 1.6V
R
T
= 140k to GND, V
FBX
= 1.6V
R
T
= 10.5k to GND, V
FBX
= 1.6V
V
FBX
= 1.6V
270
300
100
1000
1.2
220
220
330
kHz
kHz
kHz
V
ns
ns
Rev. G
ELECTRICAL CHARACTERISTICS
CONDITIONS
SHDN/UVLO
= 0V
SHDN/UVLO
= 1.15V
V
C
= 0.3V, R
T
= 41.2k
V
C
= 0.3V, R
T
= 41.2k, INTV
CC
= 7.5V
l
MIN
2.9
TYP
0.1
1.6
280
MAX
40
1
6
2.2
400
120
UNITS
V
µA
µA
mA
µA
mV
µA
100
110
–65
Current Out of Pin
V
FBX
> 0V (Note 3)
V
FBX
< 0V (Note 3)
V
FBX
> 0V (Note 4)
V
FBX
< 0V (Note 4)
V
FBX
= 1.6V (Note 3)
V
FBX
= –0.8V (Note 3)
(Note 3)
(Note 3)
V
FBX
> 0V, 2.9V < V
IN
< 40V (Notes 3, 7)
V
FBX
< 0V, 2.9V < V
IN
< 40V (Notes 3, 7)
V
FBX
= 0V, V
C
= 1.5V
V
FBX
= 1.7V
V
FBX
= –0.85V
l
l
1.569
–0.816
6
7
–10
1.6
–0.80
8
11
70
230
5
0.002
0.0025
5.5
–15
12
11
1.631
–0.784
10
14
100
10
V
V
%
%
nA
nA
µS
MΩ
0.056
0.05
%/V
%/V
V/V
µA
µA
µA
RT Voltage
Minimum Off-Time
Minimum On-Time
For more information
www.analog.com
3
LT3757/LT3757A
ELECTRICAL CHARACTERISTICS
PARAMETER
SYNC Input Low
SYNC Input High
SS Pull-Up Current
Low Dropout Regulator
INTV
CC
Regulation Voltage
INTV
CC
Undervoltage Lockout Threshold
INTV
CC
Overvoltage Lockout Threshold
INTV
CC
Current Limit
INTV
CC
Load Regulation (∆V
INTVCC
/ V
INTVCC
)
INTV
CC
Line Regulation ∆V
INTVCC
/(V
INTVCC
• ∆V
IN
)
Dropout Voltage (V
IN
– V
INTVCC
)
INTV
CC
Current in Shutdown
INTV
CC
Voltage to Bypass Internal LDO
Logic Inputs
SHDN/UVLO
Threshold Voltage Falling
SHDN/UVLO
Input Low Voltage
SHDN/UVLO
Pin Bias Current Low
SHDN/UVLO
Pin Bias Current High
Gate Driver
t
r
Gate Driver Output Rise Time
t
f
Gate Driver Output Fall Time
Gate V
OL
Gate V
OH
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
The LT3757E/LT3757AE are guaranteed to meet performance
specifications from the 0°C to 125°C junction temperature. Specifications
over the –40°C to 125°C operating junction temperature range are
assured by design, characterization and correlation with statistical process
controls. The LT3757I/LT3757AI are guaranteed over the full –40°C to
125°C operating junction temperature range. The LT3757H/LT3757AH are
guaranteed over the full –40°C to 150°C operating junction temperature
range. High junction temperatures degrade operating lifetimes. Operating
lifetime is derated at junction temperatures greater than 125°C. The
LT3757MP/LT3757AMP are 100% tested and guaranteed over the full
–55°C to 150°C operating junction temperature range.
INTV
CC
–0.05
C
L
= 3300pF (Note 5), INTV
CC
= 7.5V
C
L
= 3300pF (Note 5), INTV
CC
= 7.5V
22
20
0.05
ns
ns
V
V
V
IN
= INTV
CC
= 8V
I(V
IN
) Drops Below 1µA
SHDN/UVLO
= 1.15V
SHDN/UVLO
= 1.30V
1.7
2
10
l
l
The
l
denotes the specifications which apply over the full operating temp-
erature range, otherwise specifications are at T
A
= 25°C. V
IN
= 24V,
SHDN/UVLO
= 24V, SENSE = 0V, unless otherwise noted.
CONDITIONS
MIN
1.5
SS = 0V, Current Out of Pin
7
2.6
16
V
IN
= 40V
V
IN
= 15V
0 < I
INTVCC
< 20mA, V
IN
= 8V
8V < V
IN
< 40V
V
IN
= 6V, I
INTVCC
= 20mA
SHDN/UVLO
= 0V, INTV
CC
= 8V
30
–0.9
–10
7.2
2.7
0.1
17.5
40
95
–0.5
0.008
400
16
7.5
1.17
1.22
1.27
0.4
2.5
100
0.03
55
7.4
2.8
TYP
MAX
0.4
UNITS
V
V
µA
V
V
V
V
mA
mA
%
%/V
mV
µA
V
V
V
µA
nA
Falling INTV
CC
UVLO Hysteresis
Note 3:
The LT3757/LT3757A are tested in a feedback loop which servos
V
FBX
to the reference voltages (1.6V and –0.8V) with the V
C
pin forced
to 1.3V.
Note 4:
FBX overvoltage lockout is measured at V
FBX(OVERVOLTAGE)
relative
to regulated V
FBX(REG)
.
Note 5:
Rise and fall times are measured at 10% and 90% levels.
Note 6:
For V
IN
below 6V, the
SHDN/UVLO
pin must not exceed V
IN
.
Note 7:
SHDN/UVLO
= 1.33V when V
IN
= 2.9V.
Note 8:
The LT3757/LT3757A include overtemperature protection that
is intended to protect the device during momentary overload conditions.
Junction temperature will exceed the maximum operating junction
temperature when overtemperature protection is active. Continuous
operation above the specified maximum operating junction temperature
