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參數資料
| 型號： | LT3581IDE#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING REGULATOR, PDSO14 |
| 封裝： | 4 X 3 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-229WGED-3, DFN-14 |
| 文件頁數： | 1/36頁 |
| 文件大?。?/td> | 498K |
| 代理商： | LT3581IDE#TRPBF |
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LT3581
3581f
Typical applicaTion
DescripTion
3.3A Boost/Inverting DC/DC
Converter with Fault Protection
The LT3581 is a PWM DC/DC converter with built-in fault
protection features to aid in protecting against output
shorts, input/output overvoltages, and overtemperature
conditions. The part consists of a 42V master switch, and
a 42V slave switch that can be tied together for a total
current limit of 3.3A.
The LT3581 is ideal for many local power supply designs. It
canbeeasilyconfiguredinBoost,SEPIC,InvertingorFlyback
configurations, and is capable of generating 12V at 830mA,
or –12V at 625mA from a 5V input. In addition, the LT3581’s
slave switch allows the part to be configured in high voltage,
high power charge pump topologies that are very efficient
and require fewer components than traditional circuits.
TheLT3581’sswitchingfrequencyrangecanbesetbetween
200kHz and 2.5MHz. The part may be clocked internally at
a frequency set by the resistor from the RT pin to ground,
or it may be synchronized to an external clock. A buffered
version of the clock signal is driven out of the CLKOUT
pin, and may be used to synchronize other compatible
switching regulator ICs to the LT3581.
The LT3581 also features innovative SHDN pin circuitry
that allows for slowly varying input signals and an adjust-
able undervoltage lockout function. Additional features
such as frequency foldback and soft-start are integrated.
The LT3581 is available in 14-Pin 4mm
× 3mm DFN and
16-Lead MSE packages.
Output Short Protected, 5V to 12V Boost Converter Operating at 2MHz
FeaTures
applicaTions
n
3.3A, 42V Combined Power Switch
n
Master/Slave (1.9A/1.4A) Switch Design
n
Output Short Circuit Protection
n
Wide Input Range: 2.5V to 22V Operating,
40V Maximum Transient
n
Switching Frequency Up to 2.5MHz
n
Easily Configurable as a Boost, SEPIC, Inverting or
Flyback Converter
n
User Configurable Undervoltage Lockout
n
Low VCESAT Switch: 250mV at 2.75A (Typical)
n
Can be Synchronized to External Clock
n
Can Be Synchronized to other Switching Regulators
n
High Gain SHDN Pin Accepts Slowly Varying Input
Signals
n
14-Pin 4mm
× 3mm DFN and 16-Lead MSE Packages
n
Local Power Supply
n
Vacuum Fluorescent Display (VFD) Bias Supplies
n
TFT-LCD Bias Supplies
n
Automotive Engine Control Unit (ECU) Power
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 7579816.
VIN
5V
VIN
6.04k
100k
130k
43.2k
4.7F
1.5H
1nF
3581 TA01
0.1F
4.7F
10.5k
4.7F
VOUT
12V
830mA
SW1 SW2
FB
CLKOUT
GATE
VC
SS
VIN
RT
GND
SYNC
FAULT
SHDN
LT3581
56pF
18.7k
10k
LOAD CURRENT (mA)
0
50
EFFICIENCY
(%)
POWER
LOSS
(mW)
55
65
70
75
400
100
95
3581 TA01b
60
200
1000
800
600
80
85
90
0
200
600
2000
1200
1400
1600
1800
400
800
1000
Efficiency and Power Loss vs
Load Current
相關PDF資料 |
PDF描述 |
|---|---|
| LT3581IMSE#TRPBF | SWITCHING REGULATOR, PDSO16 |
| LT3581IMSE#PBF | SWITCHING REGULATOR, PDSO16 |
| LT3581IDE#PBF | SWITCHING REGULATOR, PDSO14 |
| LT3682IDD#TRPBF | SWITCHING REGULATOR, PDSO12 |
| LT3682EDD#TRPBF | SWITCHING REGULATOR, PDSO12 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LT3581IMSE#PBF | 功能描述:IC REG MULTI CONFIG ADJ 16MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 標準包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應商設備封裝:10-MSOP 裸露焊盤 |
| LT3581IMSE#TRPBF | 功能描述:IC REG MULTI CONFIG ADJ 16MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 標準包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應商設備封裝:10-MSOP 裸露焊盤 |
| LT3581IMSE-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:3.3A Boost/Inverting DC/DC Converter with Fault Protection |
| LT3581IMSE-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:3.3A Boost/Inverting DC/DC Converter with Fault Protection |
| LT3582 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:I2C Programmable Boost and Single Inductor Inverting DC/DC Converters with OTP |
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