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| 型号： | LT3579IFE-1#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/40页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG SYNC 20TSSOP |
| 标准包装： | 2,500 |
| 类型： | 升压（升压），反相，回扫，Sepic |
| 输出数： | 1 |
| 输入电压： | 2.5 V ~ 16 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 200kHz ~ 2.5MHz |
| 电流 - 输出： | 6A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽）裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 20-TSSOP-EP |
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LT3579/LT3579-1
6A Boost/Inverting
DC/DC Converter with Fault Protection
6A, 42V Combined Power Switch
Output Short Circuit Protection
Wide Input Range: 2.5V to 16V Operating,
LT3579-1: Dual-Phase Capable
Master/Slave (3.4A/2.6A) Switch Design
User Configurable Undervoltage Lockout
Easily Configurable as a Boost, SEPIC, Inverting, or
Low V CESAT Switch: 250mV at 5.5A (Typical)
Can be Synchronized to External Clock
Can Synchronize other Switching Regulators
High Gain SHDN Pin Accepts Slowly Varying Input
20-Lead TSSOP and 20-Pin 4mm × 5mm QFN
Local Power Supply
Vacuum Flourescent Display (VFD) Bias Supplies
TFT-LCD Bias Supplies
Automotive Engine Control Unit (ECU) Power
FEATURES
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40V Maximum Transient
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Flyback Converter
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Signals
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Packages
APPLICATIONS
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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.
TYPICAL APPLICATION
DESCRIPTION
The LT ? 3579 is a PWM DC/DC converter with built-in fault
protection features to aid in protecting against output shorts,
input/output overvoltage, 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 6A.
The LT3579 is ideal for many local power supply designs. It
can be easily configured in Boost, SEPIC, Inverting, or Flyback
configurations, and is capable of generating 12V at 1.7A, or
–12V at 1.2A from a 5V input. In addition, the LT3579’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.
The LT3579’s switching frequency range can be set between
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 LT3579.
The LT3579 also features innovative SHDN pin circuitry that
allows for slowly varying input signals and an adjustable
undervoltage lockout function. Additional features such
as frequency foldback and soft-start are integrated. The
LT3579 is available in 20-lead TSSOP and 20-pin 4mm ×
5mm QFN packages.
Efficiency and Power Loss
1MHz, 5V to 12V Boost Converter with Output Short Circuit Protection
100
3.2
V IN
5V
2.2μH
SW1 SW2
10μF
130k
6.3k
V OUT
12V
1.7A
10μF
90
80
70
2.8
2.4
2.0
V IN
22μF
100k
200k
LT3579
SHDN CLKOUT
SYNC GND SS
FB
FAULT GATE
RT V C
TEMPERATURE
MONITOR
8k
V IN
60
50
40
30
1.6
1.2
0.8
0.4
86.6k
0.1μF
47pF
2.2nF
20
0
0.25 0.5 0.75
1 1.25 1.5 1.75
2
0
35791 TA01
LOAD CURRENT (A)
35791 TA02
35791f
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3579IFE-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:6A Boost/Inverting DC/DC Converter with Fault Protection |
| LT3579IFE-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:6A Boost/Inverting DC/DC Converter with Fault Protection |
| LT3579IUFD#PBF | 功能描述:IC REG MULTI CONFIG SYNC 20QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LT3579IUFD#TRPBF | 功能描述:IC REG MULTI CONFIG SYNC 20QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LT3579IUFD-1#PBF | 功能描述:IC REG MULTI CONFIG SYNC 20QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
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