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LT3471EDD Datasheet

  • LT3471EDD

  • Dual 1.3A, 1.2MHz Boost/Inverter in 3mm ???? 3mm DFN

  • 266.72KB

  • 16頁

  • LINER

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LT3471
Dual 1.3A, 1.2MHz
Boost/Inverter in
3mm
脳
3mm DFN
FEATURES
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DESCRIPTIO
1.2MHz Switching Frequency
Low V
CESAT
Switches: 330mV at 1.3A
High Output Voltage: Up to 40V
Wide Input Range: 2.4V to 16V
Inverting Capability
5V at 630mA from 3.3V Input
12V at 320mA from 5V Input
鈥?2V at 200mA from 5V Input
Uses Tiny Surface Mount Components
Low Shutdown Current: < 1碌A(chǔ)
Low Profile (0.75mm) 10-Lead 3mm
脳
3mm
DFN Package
The LT
廬
3471 dual switching regulator combines two 42V,
1.3A switches with error amplifiers that can sense to
ground providing boost and inverting capability. The low
V
CESAT
bipolar switches enable the device to deliver high
current outputs in a small footprint. The LT3471 switches
at 1.2MHz, allowing the use of tiny, low cost and low
profile inductors and capacitors. High inrush current at
start-up is eliminated using the programmable soft-start
function, where an external RC sets the current ramp rate.
A constant frequency current mode PWM architecture
results in low, predictable output noise that is easy to filter.
The LT3471 switches are rated at 42V, making the device
ideal for boost converters up to
鹵40V
as well as SEPIC and
flyback designs. Each channel can generate 5V at up to
630mA from a 3.3V supply, or 5V at 510mA from four
alkaline cells in a SEPIC design. The device can be config-
ured as two boosts, a boost and inverter or two inverters.
The LT3471 is available in a low profile (0.75mm) 10-lead
3mm
脳
3mm DFN package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
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Organic LED Power Supply
Digital Cameras
White LED Power Supply
Cellular Phones
Medical Diagnostic Equipment
Local
鹵5V
or
鹵12V
Supply
TFT-LCD Bias Supply
xDSL Power Supply
TYPICAL APPLICATIO
V
IN
3.3V
CONTROL 1
4.7k
SHDN/SS1
0.33碌F
2.2碌H
OLED Driver
V
OUT1
7V
350mA
90.9k
SW1
FB1N
FB1P
V
REF
0.1碌F
15k
15k
4.7碌F
EFFICIENCY (%)
V
IN
10碌F
CONTROL 2
V
IN
LT3471
FB2N
4.7k
0.33碌F
SHDN/SS2
GND
10碌H
V
IN
10碌F
3471 TA01
FB2P
SW2
105k
1碌F
15碌H
75pF
V
OUT2
鈥?V
250mA
U
OLED Driver Efficiency
95
90
85
80
75
70
65
60
55
50
0
100
200
I
OUT
(mA)
3471 TA01b
U
U
V
OUT1
= 7V
V
OUT1
= 鈥?V
300
400
3471f
1

LT3471EDD 產(chǎn)品屬性

  • 0現(xiàn)貨

  • 停產(chǎn)

  • -

  • 管件

  • 停產(chǎn)

  • 升壓，升壓/降壓

  • 正和負(fù)（雙軌）

  • 可調(diào)式

  • 2

  • 2.1V

  • 16V

  • ±1V

  • ±40V

  • 1.3A

  • 1.2MHz

  • 無

  • -40°C ~ 85°C

  • 表面貼裝型

  • 10-WFDFN 裸露焊盤

  • 10-DFN（3x3）

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