LT8609E/LT8609AE/LT8609BE ......... –40°C to 125°C
LT8609I/LT8609AI/LT8609BI ............ –40°C to 125°C
LT8609H/LT8609AH .......................... –40°C to 150°C
LT8609AJ .......................................... –40°C to 150°C
Storage Temperature Range .................. –65°C to 150°C
PIN CONFIGURATION
LT8609/LT8609A
TOP VIEW
BST
SW
INTV
CC
RT
SYNC
1
2
3
4
5
11
GND
10
9
8
7
6
EN/UV
V
IN
PG
TR/SS
FB
BST
SW
INTV
CC
RT
NC
1
2
3
4
5
LT8609B
TOP VIEW
11
GND
10
9
8
7
6
EN/UV
V
IN
PG
TR/SS
FB
LT8609A
TOP VIEW
BST
NC
SW
NC
INTV
CC
RT
SYNC
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
EN/UV
NC
V
IN
NC
PG
TR/SS
FB
FB
17
GND
MSE PACKAGE
10-LEAD PLASTIC MSOP
θ
JA
= 40°C/W
EXPOSED PAD (PIN 11) IS GND,
MUST BE SOLDERED TO PCB
MSE PACKAGE
10-LEAD PLASTIC MSOP
θ
JA
= 40°C/W
EXPOSED PAD (PIN 11) IS GND,
MUST BE SOLDERED TO PCB
MS PACKAGE
16-LEAD PLASTIC MSOP
θ
JA
= 40°C/W,
θ
JC
(PAD) = 10°C/W
EXPOSED PAD (PIN 17) IS GND,
MUST BE SOLDERED TO PCB
LT8609-3.3/LT8609-5
TOP VIEW
LT8609/LT8609A
TOP VIEW
BST
SW
INTV
CC
RT
SYNC
1
2
3
4
5
11
GND
10 EN/UV
9 V
IN
8 PG
7 TR/SS
6 FB
BST
SW
INTV
CC
RT
SYNC
1
2
3
4
5
11
GND
10 EN/UV
9 V
IN
8 PG
7 TR/SS
6 V
OUT
DDM PACKAGE
10-LEAD (3mm
×
3mm) PLASTIC SIDE WETTABLE DFN
θ
JA
= 45°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
DDM PACKAGE
10-LEAD (3mm
×
3mm) PLASTIC SIDE WETTABLE DFN
θ
JA
= 45°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LT8609EMSE#PBF
LT8609IMSE#PBF
LT8609HMSE#PBF
LT8609AEMSE#PBF
LT8609AIMSE#PBF
LT8609AJMSE#PBF
LT8609AHMSE#PBF
LT8609BEMSE#PBF
TAPE AND REEL
LT8609EMSE#TRPBF
LT8609IMSE#TRPBF
LT8609HMSE#TRPBF
LT8609AEMSE#TRPBF
LT8609AIMSE#TRPBF
LT8609AJMSE#TRPBF
LT8609AHMSE#TRPBF
LT8609BEMSE#TRPBF
PART MARKING* PACKAGE DESCRIPTION
LTGRW
LTGRW
LTGRW
LTGVR
LTGVR
LTGVR
LTGVR
LTGZY
10-Lead Plastic MSOP
10-Lead Plastic MSOP
10-Lead Plastic MSOP
10-Lead Plastic MSOP
10-Lead Plastic MSOP
10-Lead Plastic MSOP
10-Lead Plastic MSOP
10-Lead Plastic MSOP
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–40°C to 150°C
–40°C to 125°C
Rev. I
2
For more information
www.analog.com
LT8609/LT8609A/LT8609B
ORDER INFORMATION
LEAD FREE FINISH
LT8609BIMSE#PBF
LT8609AEMSE16#PBF
LT8609AIMSE16#PBF
LT8609AJMSE16#PBF
LT8609AHMSE16#PBF
LT8609AEDDM#PBF
LT8609AJDDM#PBF
LT8609AHDDM#PBF
LT8609AEDDM-3.3#PBF
LT8609AJDDM-3.3#PBF
LT8609AEDDM-5#PBF
LT8609AJDDM-5#PBF
LT8609AHDDM-5#PBF
LT8609EMSE#WPBF
LT8609IMSE#WPBF
LT8609HMSE#WPBF
LT8609AEMSE#WPBF
LT8609AIMSE#WPBF
LT8609AJMSE#WPBF
LT8609AHMSE#WPBF
LT8609AEMSE16#WPBF
LT8609AIMSE16#WPBF
LT8609AJMSE16#WPBF
LT8609AHMSE16#WPBF
LT8609AEDDM#WPBF
LT8609AJDDM#WPBF
LT8609AHDDM#WPBF
TAPE AND REEL
LT8609BIMSE#TRPBF
LT8609AEMSE16#TRPBF
LT8609AIMSE16#TRPBF
LT8609AJMSE16#TRPBF
LT8609AHMSE16#TRPBF
LT8609AEDDM#TRPBF
LT8609AJDDM#TRPBF
LT8609AHDDM#TRPBF
LT8609AEDDM-3.3#TRPBF
LT8609AJDDM-3.3#TRPBF
LT8609AEDDM-5#TRPBF
LT8609AJDDM-5#TRPBF
LT8609AHDDM-5#TRPBF
LT8609EMSE#WTRPBF
LT8609IMSE#WTRPBF
LT8609HMSE#WTRPBF
LT8609AEMSE#WTRPBF
LT8609AIMSE#WTRPBF
LT8609AJMSE#WTRPBF
LT8609AHMSE#WTRPBF
LT8609AEMSE16#WTRPBF
LT8609AIMSE16#WTRPBF
LT8609AJMSE16#WTRPBF
LT8609AHMSE16#WTRPBF
LT8609AEDDM#WTRPBF
LT8609AJDDM#WTRPBF
LT8609AHDDM#WTRPBF
PART MARKING* PACKAGE DESCRIPTION
LTGZY
8609A
8609A
8609A
8609A
LHJZ
LHJZ
LHJZ
LHKB
LHKB
LHKC
LHKC
LHKC
LTGRW
LTGRW
LTGRW
LTGVR
LTGVR
LTGVR
LTGVR
8609A
8609A
8609A
8609A
LHJZ
LHJZ
LHJZ
10-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–40°C to 150°C
10-Lead (3mm × 3mm) Plastic Side Wettable DFN –40°C to 125°C
10-Lead (3mm × 3mm) Plastic Side Wettable DFN –40°C to 150°C
10-Lead (3mm × 3mm) Plastic Side Wettable DFN –40°C to 150°C
10-Lead (3mm × 3mm) Plastic Side Wettable DFN –40°C to 125°C
10-Lead (3mm × 3mm) Plastic Side Wettable DFN –40°C to 150°C
10-Lead (3mm × 3mm) Plastic Side Wettable DFN –40°C to 125°C
10-Lead (3mm × 3mm) Plastic Side Wettable DFN –40°C to 150°C
10-Lead (3mm × 3mm) Plastic Side Wettable DFN –40°C to 150°C
10-Lead Plastic MSOP
10-Lead Plastic MSOP
10-Lead Plastic MSOP
10-Lead Plastic MSOP
10-Lead Plastic MSOP
10-Lead Plastic MSOP
10-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–40°C to 150°C
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–40°C to 150°C
AUTOMOTIVE PRODUCTS**
10-Lead (3mm × 3mm) Plastic Side Wettable DFN –40°C to 125°C
10-Lead (3mm × 3mm) Plastic Side Wettable DFN –40°C to 150°C
10-Lead (3mm × 3mm) Plastic Side Wettable DFN –40°C to 150°C
10-Lead (3mm × 3mm) Plastic Side Wettable DFN –40°C to 125°C
10-Lead (3mm × 3mm) Plastic Side Wettable DFN –40°C to 150°C
10-Lead (3mm × 3mm) Plastic Side Wettable DFN –40°C to 125°C
10-Lead (3mm × 3mm) Plastic Side Wettable DFN –40°C to 150°C
10-Lead (3mm × 3mm) Plastic Side Wettable DFN –40°C to 150°C
LT8609AEDDM-3.3#WPBF LT8609AEDDM-3.3#WTRPBF LHKB
LT8609AJDDM-3.3#WPBF LT8609AJDDM-3.3#WTRPBF LHKB
LT8609AEDDM-5#WPBF
LT8609AJDDM-5#WPBF
LT8609AHDDM-5#WPBF
LT8609AEDDM-5#WTRPBF
LT8609AJDDM-5#WTRPBF
LT8609AHDDM-5#WTRPBF
LHKC
LHKC
LHKC
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.
Rev. I
For more information
www.analog.com
3
LT8609/LT8609A/LT8609B
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C.
PARAMETER
Minimum Input Voltage
l
ELECTRICAL CHARACTERISTICS
CONDITIONS
MIN
TYP
2.7
1
1.7
1
350
MAX
3.0
3.2
4
12
4
UNITS
V
V
IN
Quiescent Current
LT8609/LT8609A:
V
EN/UV
= 0V, V
SYNC
= 0V
V
EN/UV
= 2V, Not Switching, V
SYNC
= 0V
LT8609B:
V
EN/UV
= 0V
V
EN/UV
= 2V, Not Switching
l
µA
µA
µA
µA
μA
μA
μA
μA
μA
μA
V
V
V
V
V
V
V
V
V
V
%/V
%/V
%/V
nA
nA
nA
V
IN
Current in Regulation
LT8609/LT8609A:
V
IN
= 6V, V
OUT
= 2.7V, Output Load = 100μA
V
IN
= 6V, V
OUT
= 2.7V, Output Load = 1mA
LT8609A-3.3:
V
IN
= 8V, V
OUT
= 3.3V I
LOAD
= 100μA
V
IN
= 8V, V
OUT
= 3.3V I
LOAD
= 1mA
LT8609A-5:
V
IN
= 12V, V
OUT
= 5V I
LOAD
= 100μA
V
IN
= 12V, V
OUT
= 5V I
LOAD
= 1mA
l
l
l
l
l
l
46
480
46
480
46
480
0.778
0.770
0.778
0.766
0.772
0.759
3.291
3.232
4.97
4.89
0.782
0.782
0.782
0.782
0.782
0.782
3.3
3.3
5
5
0.02
0.02
0.02
90
700
90
700
90
700
0.786
0.794
0.786
0.798
0.792
0.805
3.309
3.368
5.03
5.11
0.04
0.04
0.04
±20
Feedback Reference Voltage
LT8609/LT8609A: (E-, I-, H-Grade)
V
IN
= 6V, I
LOAD
= 100mA
V
IN
= 6V, I
LOAD
= 100mA
LT8609/LT8609A: (J-Grade)
V
IN
= 6V, I
LOAD
= 100mA
V
IN
= 6V, I
LOAD
= 100mA
LT8609B:
V
IN
= 6V, I
LOAD
= 100mA
V
IN
= 6V, I
LOAD
= 100mA
l
l
l
Output Reference Voltage
LT8609A-3.3:
V
IN
= 8V, I
LOAD
= 100mA
V
IN
= 8V, I
LOAD
= 100mA
LT8609A-5:
V
IN
= 12V, I
LOAD
= 100mA
V
IN
= 12V, I
LOAD
= 100mA
l
l
l
l
l
l
l
l
l
l
Feedback Voltage Line Regulation
Output Voltage Line Regulation
Output Voltage Line Regulation
Feedback Pin Input Current
Output Pin Input Current
Output Pin Input Current
Minimum On-Time
Minimum Off Time
LT8609/LT8609A/LT8609B:
V
IN
= 4.0V to 40V
LT8609A-33:
V
IN
= 4.0V to 40V
LT8609A-5:
V
IN
= 6.0V to 40V
LT8609/LT8609A/LT8609B:
V
FB
= 1.0V
LT8609A-33:
V
OUT
= 4.0V
LT8609A-5:
V
OUT
= 6.0V
I
LOAD
= 1.5A, SYNC = 0V
I
LOAD
= 1.5A, SYNC = 1.9V
620
425
45
45
90
75
60
130
ns
ns
ns
Rev. I
4
For more information
www.analog.com
LT8609/LT8609A/LT8609B
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C.
PARAMETER
Oscillator Frequency
CONDITIONS
LT8609/LT8609A:
R
T
= 221k, I
LOAD
= 0.5A
R
T
= 60.4k, I
LOAD
= 0.5A
R
T
= 18.2k, I
LOAD
= 0.5A
LT8609B:
R
T
= 18.2k, I
LOAD
= 0.5A
Top Power NMOS On-Resistance
Top Power NMOS Current Limit
Bottom Power NMOS On-Resistance
SW Leakage Current
EN/UV Pin Threshold
EN/UV Pin Hysteresis
EN/UV Pin Current
LT8609/LT8609A:
V
EN/UV
= 2V
LT8609B:
V
EN/UV
= 2V
PG Upper Threshold Offset from V
FB
LT8609/LT8609A:
V
FB
Rising
LT8609B:
V
FB
Rising
PG Upper Threshold Offset from V
OUT
PG Lower Threshold Offset from V
FB
LT8609A-3.3/LT8609A-5
V
OUT
Rising
LT8609/LT8609A:
V
FB
Falling
LT8609B:
V
FB
Falling
PG Lower Threshold Offset from V
OUT
PG Hysteresis
PG Leakage
PG Pull-Down Resistance
Sync Low Input Voltage
Sync High Input Voltage
TR/SS Source Current
TR/SS Pull-Down Resistance
Spread Spectrum Modulation Frequency
Fault Condition, TR/SS = 0.1V
LT8609/LT8609A:
V
SYNC
= 3.3V
1
V
PG
= 42V
V
PG
= 0.1V
LT8609/LT8609A
LT8609/LT8609A:
INTV
CC
= 3.5V
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
ELECTRICAL CHARACTERISTICS
MIN
155
640
1.925
1.875
3.4
TYP
200
700
2.00
2.00
185
4.5
115
MAX
245
760
2.075
2.125
5.7
15
UNITS
kHz
kHz
MHz
MHz
mΩ
A
mΩ
µA
V
mV
I
LOAD
= 1A
l
V
IN
= 42V, V
SW
= 40V
EN/UV Rising
l
l
0.99
1.05
50
1.11
±20
±30
5
4
5
5
4
5
8.5
8.5
7.5
8.5
8.5
7.5
0.5
±200
550
0.4
0.9
2.7
1
2
300
3
3.2
3
900
6
1200
13
14
11
13
14
11
nA
nA
%
%
%
%
%
%
%
nA
Ω
V
V
µA
Ω
kHz
LT8609A-3.3/LT8609A-5
V
OUT
Falling
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. Absolute Maximum Ratings are those values
beyond which the life of a device may be impaired.
Note 2:
The LT8609E/LT8609AE/LT8609BE is guaranteed to meet
performance specifications from 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 LT8609I/LT8609AI/LT8609BI is
guaranteed over the full –40°C to 125°C operating junction temperature
range. The LT8609H/LT8609AH/LT8609AJ is 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.
Note 3:
This IC includes overtemperature protection that is intended to
protect the device during overload conditions. Junction temperature will
exceed 150°C when overtemperature protection is active. Continuous
operation above the specified maximum operating junction temperature
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