LT8619E, LT8619E-5 .......................... –40°C to 125°C
LT8619I, LT8619I-5 ............................ –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
PIN CONFIGURATION
TOP VIEW
V
IN
EN/UV
RT
PG
SYNC
1
2
3
4
5
11
GND
10 SW
9 BST
8 INTV
CC
7 BIAS
6 FB*
NC
V
IN
NC
EN/UV
RT
PG
SYNC
GND
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
SW
SW
BST
NC
INTV
CC
BIAS
FB/OUT*
FB/OUT*
17
GND
DD PACKAGE
10-LEAD (3mm
×
3mm) PLASTIC DFN
θ
JA
= 43°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
*FB FOR LT8619, OUT FOR LT8619-5
MSE PACKAGE
16-LEAD PLASTIC MSOP
θ
JA
= 40°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LT8619EDD#PBF
LT8619IDD#PBF
LT8619EMSE#PBF
LT8619IMSE#PBF
LT8619EMSE-5#PBF
LT8619IMSE-5#PBF
TAPE AND REEL
LT8619EDD#TRPBF
LT8619IDD#TRPBF
LT8619EMSE#TRPBF
LT8619IMSE#TRPBF
LT8619EMSE-5#TRPBF
LT8619IMSE-5#TRPBF
http://www.linear.com/product/LT8619#orderinfo
PART MARKING*
LGNP
LGNP
8619
8619
86195
86195
PACKAGE DESCRIPTION
10-Lead (3mm × 3mm) Plastic DFN
10-Lead (3mm × 3mm) Plastic DFN
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 125°C
–40°C to 125°C
–40°C to 125°C
Consult ADI Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
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/.
Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
2
8619f
For more information
www.linear.com/LT8619
LT8619/LT8619-5
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
EN/UV
= 2V unless otherwise noted (Notes 2, 3)
PARAMETER
Switching Loop
V
IN
Minimum Input Voltage
V
IN
Quiescent Current at No Load
V
IN
= 12V, V
EN/UV
= 0V
l
ELECTRICAL CHARACTERISTICS
CONDITIONS
MIN
TYP
MAX
3.0
UNITS
V
µA
µA
µA
µA
µA
mA
0.6
0.6
6
6
10
3
1.0
3.0
10
18
V
IN
= 12V, V
OUT
= 3.3V, R
T
= 66.5k, V
EN/UV
= 2V, V
SYNC
= 0V
l
V
IN
= 12V, V
OUT
= 3.3V, R
T
= 66.5k, V
EN/UV
= 2V, Floats SYNC
V
IN
= 12V, V
OUT
= 3.3V, R
T
= 66.5k, V
EN/UV
= 2V, V
SYNC
= INTV
CC
V
IN
Current in Regulation
BIAS Pin Current Consumption
Regulated Output Voltage
Feedback Voltage
Feedback Voltage Line Regulation
Feedback Pin Input Current
Minimum On-Time
Minimum Off-Time
Top Switch Peak Current Limit
Bottom Switch Current Limit
Bottom Switch Reverse Current Limit
Soft-Start Duration
EN/UV to PG High Delay
EN/UV to PG Low Delay
Oscillator and SYNC
Operating Frequency
R
T
= 162k
R
T
= 66.5k
R
T
= 20k
Synchronization Frequency
SYNC Threshold
f
SYNC
≥ f
OSC
Frequency Synchronization
Burst Mode Operation
Floats SYNC Pin, Pulse-Skipping Mode
Forced Continuous Mode
Built-In Sourcing Current, V
SYNC
= 0V
Built-In Sinking Current, V
SYNC
= 3.3V
l
l
l
l
l
V
IN
= 12V, V
OUT
= 3.3V, R
T
= 66.5k, V
EN/UV
= 2V, V
SYNC
= 0V
I
LOAD
= 100µA
I
LOAD
= 1mA
V
IN
= 12V, V
BIAS
= 3.3V, I
LOAD
= 0.5A, f
OSC
= 700kHz
LT8619-5, V
IN
= 12V, V
SYNC
= INTV
CC
, No Load
l
l
38
320
2.2
4.975
4.925
0.796
0.788
5.0
5.0
0.8
0.8
±0.004
30
100
1.5
150
1.75
1.8
0.55
0.2
0.66
10
260
630
1.9
0.3
0.35
1.6
1
0.6
1.2
2.0
–0.2
3.0
300
700
2.0
65
400
5.025
5.075
0.804
0.812
±0.03
±20
60
180
2.0
µA
µA
mA
V
V
V
%/V
nA
ns
ns
A
A
A
ms
ms
µs
l
LT8619, V
IN
= 12V, V
SYNC
= INTV
CC
, No Load
l
V
IN
= 4V to 50V, V
SYNC
= INTV
CC
LT8619, V
FB
= 0.8V
LT8619, I
LOAD
= 0.5A, V
SYNC
= INTV
CC
l
l
V
SYNC
= INTV
CC
V
IN
= 12V, V
OUT
= 3.3V, No Load, C
OUT
= 22µF
C
INTVCC
= 1µF, V
OUT
= 3.3V, No Load, C
OUT
= 22µF
340
770
2.1
2.2
0.95
2.4
kHz
kHz
MHz
MHz
V
V
V
B
µA
µA
SYNC Pin Current
For more information
www.linear.com/LT8619
3
8619f
LT8619/LT8619-5
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
EN/UV
= 2V unless otherwise noted (Notes 2, 3)
PARAMETER
Switch, Logic and Power Good
Top Switch On-Resistance
Bottom Switch On-Resistance
EN/UV Power-On Threshold
EN/UV Power-On Hysteresis
EN/UV Shutdown Threshold
EN/UV Pin Current
Overvoltage Threshold
Positive Power Good Threshold
Negative Power Good Threshold
Positive Power Good Delay
Negative Power Good Delay
PG Leakage
PG V
OL
EN/UV Falling
V
EN/UV
= 2V
V
FB
Rising Wrt. Regulated V
FB
V
FB
Rising Wrt. Regulated V
FB
V
FB
Falling Wrt. Regulated V
FB
V
FB
= 0.8V
↑
0.9V to PG Low
V
FB
= 0.9V
↓
0.8V to PG High
V
FB
= 0.8V
↓
0.7V to PG Low
V
FB
= 0.7V
↑
0.8V to PG High
V
PG
= 3.3V, Power Good
I
PG
= 100µA
l
l
l
l
ELECTRICAL CHARACTERISTICS
CONDITIONS
I
LOAD
= 0.1A
I
LOAD
= 0.1A
EN/UV Rising
MIN
TYP
0.45
0.22
MAX
UNITS
Ω
Ω
l
0.94
0.34
–100
1.0
40
0.56
3.75
1.1
0.92
100
V
mV
V
nA
%
%
%
µs
µs
µs
µs
5
–5
7.5
–7.5
60
35
60
35
10
–10
±100
0.01
0.3
nA
V
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:
All currents into device pins are positive; all currents out of device
pins are negative. All Voltages are referenced to ground unless otherwise
specified.
Note 3:
The LT8619 is tested under pulse load conditions such that
T
J
≈ T
A
. The LT8619E 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
LT8619I is guaranteed over the full –40°C to 125°C operating junction
temperature range. High junction temperatures degrade operating
lifetimes. Operating lifetime is derated at junction temperatures greater
than 125°C.
Note 4:
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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