EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
LT3971-3.3, LT3971-5
BD
BOOST
SW
V
IN
EN
1
2
3
4
5
TOP VIEW
11
GND
10
9
8
7
6
MSE PACKAGE
10-LEAD PLASTIC MSOP
θ
JA
= 45°C,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
SYNC
PG
RT
SS
V
OUT
MSE PACKAGE
10-LEAD PLASTIC MSOP
θ
JA
= 45°C,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
orDer inForMaTion
LEAD FREE FINISH
LT3971EDD#PBF
LT3971IDD#PBF
LT3971EMSE#PBF
LT3971IMSE#PBF
LT3971-3.3EMSE#PBF
LT3971-3.3IMSE#PBF
LT3971-5EMSE#PBF
LT3971-5IMSE#PBF
TAPE AND REEL
LT3971EDD#TRPBF
LT3971IDD#TRPBF
LT3971EMSE#TRPBF
LT3971IMSE#TRPBF
LT3971-3.3EMSE#TRPBF
LT3971-3.3IMSE#TRPBF
LT3971-5EMSE#TRPBF
LT3971-5IMSE#TRPBF
PART MARKING*
LFJF
LFJF
LTFJG
LTFJG
LTFRN
LTFRN
LTFRQ
LTFRQ
PACKAGE DESCRIPTION
10-Lead (3mm
×
3mm) Plastic DFN
10-Lead (3mm
×
3mm) Plastic DFN
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 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 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/
3971fa
2
LT3971/LT3971-3.3/LT3971-5
elecTrical characTerisTics
PARAMETER
Minimum Input Voltage
Quiescent Current from V
IN
LT3971 FB Pin Current
Internal Feedback Resistor Divider (LT3971-X)
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
EN
= 12V, V
BD
= 3.3V unless otherwise noted. (Note 2)
CONDITIONS
(Note 4)
V
EN
Low
V
EN
High, V
SYNC
Low
V
EN
High, V
SYNC
Low
V
FB
= 1.19V
l
MIN
TYP
4
0.7
1.7
MAX
4.3
1.2
2.7
4.5
12
1.205
1.215
3.35
3.376
5.07
5.11
0.01
2.4
1.2
240
150
3
1
1
1.8
28
1.07
20
140
12.5
1
1.0
1.6
UNITS
V
μA
μA
μA
nA
MΩ
V
V
V
V
V
V
%/V
MHz
MHz
kHz
ns
ns
A
mV
μA
mV
μA
V
mA
V
mV
nA
mV
mV
%
%
µA
μA
V
nA
μA
l
l
0.1
10
1.175
1.165
3.25
3.224
4.93
4.89
1.6
0.8
160
1.19
1.19
3.3
3.3
5
5
0.0002
2
1
200
80
110
1.8
2.4
330
0.02
770
0.02
LT3971-3.3 Output Voltage
l
LT3971-5 Output Voltage
l
FB Voltage Line Regulation
Switching Frequency
4.3V < V
IN
< 38V (Note 4)
R
T
= 11k
R
T
= 35.7k
R
T
= 255k
Minimum Switch On Time
Minimum Switch Off Time
Switch Current Limit
Switch V
CESAT
Switch Leakage Current
Boost Schottky Forward Voltage
Boost Schottky Reverse Leakage
Minimum Boost Voltage (Note 3)
BOOST Pin Current
EN Voltage Threshold
EN Voltage Hysteresis
EN Pin Current
LT3971 PG Threshold Offset from V
FB
LT3971 PG Hysteresis
LT3971-X PG Threshold Offset from V
OUT
LT3971-X PG Hysteresis
PG Leakage
PG Sink Current
SYNC Threshold
SYNC Pin Current
SS Source Current
V
SS
= 1V
0.6
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 LT3971E 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
V
PG
= 3V
V
PG
= 0.4V
l
I
SW
= 1A
I
SH
= 100mA
V
REVERSE
= 12V
V
IN
= 5V
I
SW
= 1A, V
BOOST
= 15V
EN Rising
l
l
1.4
20
0.95
1.01
30
0.2
V
FB
Rising
V
OUT
Rising
60
5.5
100
20
9
1.3
0.02
300
0.6
570
0.8
0.1
1
LT3971I 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 3:
This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the switch.
Note 4:
Minimum input voltage depends on application circuit.
[size=5]FPGA (Field Programmable Gate Array) and CPLD (Complex Programmable Logic Device) are both programmable logic devices, which are developed on the basis of PAL, GAL and other logic devices. Com...
This solution uses ADI's "USB-based thermocouple temperature monitor with cold junction compensation using the precision analog microcontroller ADuC7060/ADuC7061 (CN0214)" as the core circuit to quick...
As shown in the figure
I know that the left side is a RJ45 + 2 USB interface structure
The right side shows the structure of DB9+VGA connectors.
But if you want to search for them, what are the keywor...
I am making a learning infrared remote control recently, and I use a 2274 board. I use a mouse to control everything. Has anyone done this? I need some advice~~ If possible, please contact me via emai...
STM32F103void Uart1_PutString(u8* buf , u8 len){for(u8 i=0;i{Uart1_PutChar(*buf++);}}u8 Uart1_PutChar(u8 ch){//USART_ITConfig(USART1, USART_IT_TXE, ENABLE );/* Write a character to the USART */Delay_M...
After 3 weeks of hard work, uPyCraft IDE has fully supported microbit, and we look forward to your use. uPyCraft IDE (V0.23 and above) supports microbit mainly in the following aspects: 1. Automatic d...
On January 30, the Tai'an Sports College coal-to-electricity thermal storage heating project designed and constructed by Shandong CITIC Energy successfully passed the acceptance. The acceptance tea...[Details]
In a photovoltaic system, a photovoltaic array is usually formed by connecting multiple components in series and parallel. Due to the inconsistency of the electrical parameters of the components ...[Details]
China Energy Storage Network News:
The major National Social Science Fund bidding project "China's Electricity Interconnection with Neighboring Countries - Taking Russia and Southeast Asian C...[Details]
Core Tip
: What is an inverter? Inverters play an important role in photovoltaic power generation. They mainly convert the direct current generated by photovoltaic modules into alternating cu...[Details]
As a widely used chemical "power source" in the world, batteries have the advantages of stable voltage, safety and reliability, low price, wide application range, abundant raw materials and high re...[Details]
Kassel/Sydney, November 21, 2017 – In 2017, SMA Australia signed agreements to supply PV inverters with a total capacity of more than 1.2GW for more than 20 large-scale PV power plant projects in A...[Details]
Chinese inverter manufacturer Shenzhen Growatt New Energy has supplied CP2000 Station-S compact central inverters to three 5 MW sub-plants of a 20 MW solar power plant in Thailand, and string inver...[Details]
China Energy Storage Network News:
Under the new situation of the "13th Five-Year Plan" energy reform, a new round of power system reform has entered a critical stage, and the energy Internet...[Details]
On November 22, 2016, the Dongguan Lithium Battery Industry Association was formally established and held its first member meeting. It is reported that the association has 53 members in its first s...[Details]
China Energy Storage Network News:
Recently, the National Energy Administration officially approved the "Shigatse Clean Energy Demonstration City Development Plan (2016-2020)" (hereinafter re...[Details]
Sungrow Power Supply announced in the morning of the 24th that it will release five new inverter models at the SNEC 9th (2015) International Solar Energy Industry and Photovoltaic Engineering Exhib...[Details]
Just after the Lantern Festival, the photovoltaic industry ushered in a photovoltaic feast. The 2017 "Sunshine Maker" training camp for regional distributors of household photovoltaic power generat...[Details]
Recently, Maxwell Technologies Inc. of the United States and CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd. (hereinafter referred to as "Qingdao Sifang") reached a major agreement: ...[Details]
When Qishan County meets photovoltaics, Qishan will have bluer skies, clearer water and a more beautiful environment! When photovoltaic systems meet micro inverters, this 21.84kW project in Qishan,...[Details]
In accordance with the "Standardized Conditions for the Lithium-ion Battery Industry" and the "Interim Measures for the Administration of Standardized Announcements for the Lithium-ion Battery Indu...[Details]
FPGA/CPLD
京公网安备 11010802033920号
EEWORLD
