, RT Voltage ....................................................6V
PG, BD Voltage .........................................................30V
Operating Junction Temperature Range (Note 2)
LT3990E/LT3990E-X ........................... –40°C to 125°C
LT3990I/LT3990I-X ............................ –40°C to 125°C
LT3990H/LT3990H-X .......................... –40°C to 150°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
MS Only ............................................................ 300°C
PIN CONFIGURATION
TOP VIEW
FB
EN/UVLO
V
IN
GND
GND
1
2
3
4
5
11
GND
10 RT
9 PG
8 BD
7 BOOST
6 SW
FB/V
OUT
*
FB/V
OUT
*
NC
EN/UVLO
NC
V
IN
NC
GND
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
RT
NC
PG
BD
NC
BOOST
NC
SW
17
GND
DD PACKAGE
10-LEAD (3mm
×
3mm) PLASTIC DFN
θ
JA
= 45°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
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
*FB FOR LT3990, V
OUT
FOR LT3990-3.3, LT3990-5
ORDER INFORMATION
LEAD FREE FINISH
LT3990EDD#PBF
LT3990IDD#PBF
LT3990EMSE#PBF
LT3990IMSE#PBF
LT3990HMSE#PBF
LT3990EMSE-3.3#PBF
LT3990IMSE-3.3#PBF
LT3990HMSE-3.3#PBF
LT3990EMSE-5#PBF
LT3990IMSE-5#PBF
LT3990HMSE-5#PBF
TAPE AND REEL
LT3990EDD#TRPBF
LT3990IDD#TRPBF
LT3990EMSE#TRPBF
LT3990IMSE#TRPBF
LT3990HMSE#TRPBF
LT3990EMSE-3.3#TRPBF
LT3990IMSE-3.3#TRPBF
LT3990EMSE-5#TRPBF
LT3990IMSE-5#TRPBF
LT3990HMSE-5#TRPBF
PART MARKING*
LFWJ
LFWJ
3990
3990
3990
399033
399033
39905
39905
39905
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
16-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 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 125°C
–40°C to 125°C
–40°C to 150°C
LT3990HMSE-3.3#TRPBF 399033
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/
3990fa
2
LT3990/LT3990-3.3/LT3990-5
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum Input Voltage
Quiescent Current from V
IN
LT3990 Feedback Voltage
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 12V, V
BD
= 3.3V unless otherwise noted. (Note 2)
CONDITIONS
l
MIN
TYP
4
0.7
1.9
MAX
4.2
1.2
2.8
4
1.225
1.235
3.34
3.366
5.06
5.1
20
0.01
2.76
1008
252
865
540
2
2
2
1.8
12
30
1.28
13.5
1
UNITS
V
µA
µA
µA
V
V
V
V
V
V
nA
%/V
MHz
kHz
kHz
mA
mA
mV
µA
mV
µA
mV
µA
V
mA
nA
V
mV
%
%
µA
µA
ns
V
EN/UVLO
Low
V
EN/UVLO
High
V
EN/UVLO
High
l
1.195
1.185
3.26
3.234
4.94
4.9
1.21
1.21
3.3
3.3
5
5
0.1
0.0002
LT3990-3.3 Output Voltage
l
LT3990-5 Output Voltage
l
LT3990 FB Pin Bias Current (Note 3)
FB/Output Voltage Line Regulation
Switching Frequency
4.2V < V
IN
< 40V
R
T
= 41.2k, V
IN
= 6V
R
T
= 158k, V
IN
= 6V
R
T
= 768k, V
IN
= 6V
V
IN
= 5V, V
FB
= 0V
V
IN
= 5V
I
SW
= 200mA
I
SCH
= 100mA, V
IN
= V
BD
= NC
V
SW
= 12V
I
SCH
= 50mA, V
IN
= NC, V
BOOST
= 0V
V
REVERSE
= 12V
V
IN
= 5V
I
SW
= 200mA, V
BOOST
= 15V
V
EN/UVLO
= 12V
EN/UVLO Rising, V
IN
≥ 4.2V
V
FB
Rising
V
PG
= 3V
V
PG
= 0.4V
V
IN
= 10V
l
1.84
672
168
535
360
2.3
840
210
700
450
210
0.05
725
0.05
900
0.02
Switch Current Limit
Catch Schottky Current Limit
Switch V
CESAT
Switch Leakage Current
Catch Schottky Forward Voltage
Catch Schottky Reverse Leakage
Boost Schottky Forward Voltage
Boost Schottky Reverse Leakage
Minimum Boost Voltage (Note 4)
BOOST Pin Current
EN/UVLO Pin Current
EN/UVLO Voltage Threshold
EN/UVLO Voltage Hysteresis
PG Threshold Offset from Feedback Voltage
PG Hysteresis as % of Output Voltage
PG Leakage
PG Sink Current
Minimum Switch On-Time
Minimum Switch Off-Time
l
1.4
8.5
1
l
1.14
6.5
1.19
35
10
1.0
0.01
l
30
80
115
100
160
l
ns
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 LT3990E 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
LT3990I is guaranteed over the full –40°C to 125°C operating junction
temperature range. The LT3990H 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:
Bias current flows into the FB pin.
Note 4:
This is the minimum voltage across the boost capacitor needed to
VC2005 comes with a pocket pc 2003 when it is installed, but there is a problem when using it. I created a dialog box, deleted the "Todo: xxxxx" in the dialog box, put a button on the dialog box, and ...
I am a novice, and I sincerely ask the seniors in the wireless industry for advice. I don't have many points, but I will definitely give them to you. I hope you can give me some advice. . Thank you! T...
Because I wrote a RAM myself, and used ram[7:0]. After making it into a symbol file, it shows an interface like a bus. So if I want to use this device (I mean when drawing), I have to write ram[0]~ram...
The core board of S3C2440 is a 6-layer board. How are the power, ground, and signals distributed in these 6 layers? What are the requirements for routing when drawing the board? How to set fan-out usi...
The upgraded version of the mobile phone worn on the hand looks basically the same as the old version, but the size is much smaller and the functions are much stronger. First, the black and white LCD ...
PV DC fuses are safety devices used to protect PV panels, inverters, and DC loads. To ensure their safety and reliability, they must be UL248 certified.
Before applying for UL248 certifi...[Details]
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]
Electric vehicles are currently gaining momentum, but this is just a facade. Fuel-powered vehicles remain unchallenged. While electric vehicles boast unique advantages in environmental emissions an...[Details]
"Have you set your calendar reminder?"
On August 24, Nvidia Robotics' official account posted a photo of a black gift box on a social media platform, with an attached greeting card sig...[Details]
Limited vocabulary recognition
According to the number of characters, words or short sentences in the vocabulary, it can be roughly divided into: less than 100 is small vocabulary; 100-1000 is...[Details]
Logic analyzers are widely used tools in digital design verification and debugging. They can verify the proper functioning of digital circuits and help users identify and troubleshoot faults. They ...[Details]
With the rapid advancement of automation technology, collaboration between robots is no longer just science fiction. Imagine dozens of machines moving goods in a warehouse without interfering with ...[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]
In June 2014, the Ministry of Industry and Information Technology issued 4G FD-LTE licenses to China Unicom and China Telecom. Together with the 4G TD-LTE licenses issued to China Mobile, China Uni...[Details]
1. Multi-channel DAC technology bottleneck
Currently,
the development of multi-channel DAC technology focuses on two core challenges.
First, industrial applications urgently ...[Details]
In daily life, power transformers have different functions and uses due to different usage scenarios. The most common ones can be divided into: control transformers, isolation transformers, rectifi...[Details]
Compared to cloud databases, minicomputers are purpose-built for decentralized, rugged computing at the edge of the network. By moving applications, analytics, and processing services closer to the...[Details]
The MCX E series is the most reliability- and safety-focused series in NXP's extensive MCX product portfolio.
With the launch of this series, NXP has further enriched its 5V-compatible MCU pr...[Details]
In the period after the switching power supply achieved the "20 kHz" revolution in the 1970s, although improvements and enhancements were made in circuit technology, the development level of the se...[Details]
Inverter power supplies on the market can generally be divided into two categories: sine wave inverters and square wave inverters. Some engineers also like to categorize pure sine wave inverters as...[Details]
RF/Wirelessly
京公网安备 11010802033920号
EEWORLD
