Reflow Peak Body Temperature ............................ 260°C
pin conFiguraTion
TOP VIEW
V
FB1
RUN1
RLIM
PGOOD1
SW1
1
2
3
4
5
11
GND
10 V
FB2
9 RUN2
8 PGOOD2
7 SW2
6 V
IN
TOP VIEW
V
FB1
RUN1
RLIM
PGOOD1
SW1
1
2
3
4
5
11
GND
10
9
8
7
6
V
FB2
RUN2
PGOOD2
SW2
V
IN
DD PACKAGE
10-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 40°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
MSE PACKAGE
10-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 45°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
orDer inForMaTion
LEAD FREE FINISH
LTC3619BEDD#PBF
LTC3619BIDD#PBF
LTC3619BEMSE#PBF
LTC3619BIMSE#PBF
TAPE AND REEL
LTC3619BEDD#TRPBF
LTC3619BIDD#TRPBF
LTC3619BEMSE#TRPBF
LTC3619BIMSE#TRPBF
PART MARKING*
LFFH
LFFH
LTFFJ
LTFFJ
PACKAGE DESCRIPTION
10-Lead (3mm
×
3mm) Plastic DFN
10-Lead (3mm
×
3mm) Plastic DFN
10-Lead Plastic MSOP
10-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
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 non-standard 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/
The
l
denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 3)
SYMBOL
V
IN
V
UV
PARAMETER
V
IN
Operating Voltage Range
V
IN
Undervoltage Lockout
V
IN
Low to High
CONDITIONS
l
l
elecTrical characTerisTics
MIN
2.5
TYP
2.1
MAX
5.5
2.5
UNITS
V
V
3619bfb
2
LTC3619B
elecTrical characTerisTics
SYMBOL
I
FB
V
FBREG
ΔV
LINEREG
ΔV
LOADREG
I
S
f
OSC
I
LIM(PEAK)
I
INLIM
R
DS(ON)
PARAMETER
Feedback Pin Input Current
Feedback Voltage (Channels 1, 2)
V
FB
Line Regulation
V
FB
Load Regulation (Channel 1)
V
FB
Load Regulation (Channel 2)
Supply Current
Active Mode (Note 4)
Shutdown
Oscillator Frequency
Peak Switch Current Limit
Channel 1 (400mA)
Channel 2 (800mA)
Input Average Current Limit
LTC3619BE, –40°C < T
J
< 85°C (Note 7)
LTC3619BI, –40°C < T
J
< 125°C (Note 7)
V
IN
= 2.5V to 5.5V (Note 7)
I
LOAD
= 0mA to 400mA (Note 7)
I
LOAD
= 0mA to 800mA (Note 7)
V
FB1
= V
FB2
= 0.95
×
V
FBREG
V
RUN1
= V
RUN2
= 0V, V
IN
= 5.5V
V
FB
= V
FBREG
V
IN
= 5V, V
FB
< V
FBREG
, Duty Cycle <35%
RLIM = 116k
RLIM = 116k, LTC3619BE
RLIM = 116k, LTC3619BI
V
IN
= 5V, I
SW
= 100mA
V
IN
= 5V, I
SW
= 100mA
V
IN
= 5V, I
SW
= 100mA
V
IN
= 5V, I
SW
= 100mA
V
IN
= 5V, V
RUN
= 0V
V
FB
from 0.06V to 0.54V
l
l
The
l
denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 3)
CONDITIONS
l
l
l
MIN
0.588
0.582
TYP
0.600
0.600
0.01
0.5
0.5
600
MAX
±30
0.612
0.618
0.25
UNITS
nA
V
V
%/V
%
%
875
1
2.7
µA
µA
MHz
mA
mA
1.8
550
1800
2.25
800
2400
475
475
475
0.45
0.35
0.27
0.25
0.01
l
l
450
437
427
500
513
523
mA
mA
mA
Ω
Ω
Ω
Ω
Channel 1 (Note 5)
Top Switch On-Resistance
Bottom Switch On-Resistance
Channel 2 (Note 5)
Top Switch On-Resistance
Bottom Switch On-Resistance
Switch Leakage Current
Soft-Start Time
RUN Threshold High
RUN Leakage Current
Power Good Threshold
I
SW(LKG)
t
SOFTSTART
V
RUN
I
RUN
PGOOD
1
1.3
1.2
1
µA
ms
V
µA
%
%
0.3
0.4
l
0.95
1
0.01
0V ≤ V
RUN
≤ 5V
Entering Window
V
FB
Ramping Up
V
FB
Ramping Down
Leaving Window
V
FB
Ramping Up
V
FB
Ramping Down
PGOOD Rising and Falling, V
IN
= 5V
–5
5
–7
7
9
–9
90
11
–11
30
±1
%
%
µs
Ω
µA
PGOOD Blanking
R
PGOOD
I
PGOOD
Power Good Blanking Time
Power Good Pull-Down On-Resistance
PGOOD Leakage Current
8
V
PGOOD
= 5V
15
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:
Guaranteed by long term current density limitations.
Note 3:
The LTC3619B is tested under pulsed load conditions such that
T
J
≈ T
A
. The LTC3619BE is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 125°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls. The LTC3619BI is guaranteed
to meet specified performance over the full –40°C to 125°C operating
junction temperature range. Note that the maximum ambient temperature
is determined by specific operating conditions in conjunction with board
layout, the rated package thermal resistance and other environmental
factors.
Note 4:
Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 5:
The switch on-resistance is guaranteed by correlation to wafer
level measurements.
Note 6:
This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 7:
The converter is tested in a proprietary test mode that connects
the output of the error amplifier to the SW pin, which is connected to an
After installing EVC 4.0 + PPC 2003 + PPC2003SE CHS, I can run the Chinese simulator, but when developing the program, the Chinese on the controls is displayed as garbled characters. Please tell me ho...
Design a high-pass filter with a cutoff frequency of 10K. The design process is as follows: 1. Open WEBENCH and select Highpass, as shown in the figure:2. Set the parameters, click Start Design, and g...
I wrote a driver (dll) myself. When wince starts, after loading the driver, it is unloaded immediately. The tracking code finds that it enters the entry function of the dll. After execution, the relat...
1. Synchronous Boost (5V4A) DC/DC Controller for USB Battery Chargers The NexFET Power MOSFET CSD16340Q3 minimizes losses in power conversion and is optimized for 5V gate drive applications. [/align][...
Testing of multiple HBLED devices
Applications such as burn -in require simultaneous measurement of multiple devices.Junction self-heating[1] isHBLEDproduction testing. As junction temperature increas...
To enable real-time monitoring of home security and automatically dial a number for voice prompts or send text messages when an alarm occurs, a GPRS-based embedded telephone alarm system was design...[Details]
Recently, AstroBo Robot, a subsidiary of Chenxing Automation, launched a new mobile collaborative palletizing product. Leveraging an omnidirectional mobile chassis, an intelligent scheduling system...[Details]
Based on the commutation technology, thyristor rectifiers are classified into two main types. Line-commutated and force-commutated inverters are commonly used, while other commutated inverters, nam...[Details]
The difference between a series inverter and a parallel inverter is that they use different oscillation circuits. A series inverter connects L, R, and C in series, while a parallel inverter connect...[Details]
New version helps developers build secure and trustworthy embedded systems
Shanghai, China—August 21, 2025—
QNX, a division of BlackBerry Ltd., today announced the release of QNX...[Details]
introduction
Inverter air conditioners are a trend in the current era and have gradually become commonplace in countless households. Beyond their basic cooling and heating functions, air condi...[Details]
The evolution of high-speed networks remains guided by the same core objectives: increasing data rates, reducing latency, improving reliability, lowering power consumption, and maintaining or exten...[Details]
While aberration theory is a vast subject, a basic understanding of some fundamental concepts can make it easier to understand: spherical aberration, astigmatism, field curvature, and chromatic abe...[Details]
Compared to gasoline-powered vehicles, electric vehicles have a simpler structure, allowing for greater flexibility in the layout of various components. While electric and gasoline-powered vehicles...[Details]
Imagine you're trying to turn left onto a busy road. Car after car passes in front of you, and the long wait grows increasingly frustrating. Finally, a gracious driver slows down and makes room for...[Details]
On August 10th, Ni Guangnan, an academician of the Chinese Academy of Engineering,
stated at the
2025 World
Robotics
Conference that
artificial intelligence
is currently
leading profo...[Details]
Motors and insulating varnish are inseparable. The composition and manufacturing technology of insulating varnish have been continuously updated and improved, driving the rapid development of motor...[Details]
According to foreign media reports, in a groundbreaking study, three researchers from Chongqing University revealed a new method for estimating the state of charge (SoC) of lithium-ion batteries, w...[Details]
1. Fiber Optic Sensor
A fiber optic sensor consists of a light source, an input fiber, an output fiber, an optical modulator, a light detector, and a demodulator. The basic principle is that l...[Details]
Embedded System
京公网安备 11010802033920号
EEWORLD
