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參數資料
| 型號： | LT3741IUF#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING CONTROLLER, 1070 kHz SWITCHING FREQ-MAX, PQCC20 |
| 封裝： | 4 X 4 MM, LEAD FREE, PLASTIC, MO-220WGGD-1, QFN-20 |
| 文件頁數： | 1/24頁 |
| 文件大小： | 243K |
| 代理商： | LT3741IUF#TRPBF |
LT3741
1
3741fb
TYPICAL APPLICATION
DESCRIPTION
High Power, Constant
Current, Constant Voltage,
Step-Down Controller
The LT
3741 is a xed frequency synchronous step-down
DC/DC controller designed to accurately regulate the output
current at up to 20A. The average current-mode controller
will maintain inductor current regulation over a wide output
voltage range of 0V to (VIN – 2V). The regulated current is
set by an analog voltage on the CTRL pins and an external
sense resistor. Due to its unique topology, the LT3741 is
capable of sourcing and sinking current. The regulated
voltage and overvoltage protection are set with a voltage
divider from the output to the FB pin. Soft-Start is provided
to allow a gradual increase in the regulated current during
startup. The switching frequency is programmable from
200kHz to 1MHz through an external resistor on the RT
pin or through the use of the SYNC pin and an external
clock signal.
Additional Features include an accurate external reference
voltage for use with the CTRL pins, an accurate UVLO/EN
pin that allows for programmable UVLO hysteresis, and
thermal shutdown.
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 7199560, 7321203 and others pending.
10V/20A Constant Current, Constant Voltage Step-Down Converter
FEATURES
APPLICATIONS
n Control Pin Provides Accurate Control of Regulated
Output Current
n ±1.5% Voltage Regulation Accuracy
n ±6% Current Regulation Accuracy
n 6V to 36V Input Voltage Range
n Wide Output Voltage Range Up to (VIN – 2V)
n Average Current Mode Control
n <1μA Shutdown Current
n Up to 94% Efciency
n Additional Pin for Thermal Control of Load Current
n Thermally Enhanced 4mm
4mm QFN and 20-Pin
FE Package
n General Purpose Industrial
n Super-Cap Charging
n Applications Needing Extreme Short-Circuit
Protection and/or Accurate Output Current Limit
n Constant Current or Constant Voltage Source
EN/UVLO
HG
VIN
CBOOT
VREF
VC
CTRL1
CTRL2
LT3741
RT
SYNC
SW
LG
GND
SENSE+
SENSE–
VCC_INT
220nF
2.2μH
22μF
2.5mΩ
FB
10nF
39.2k
5.6nF
82.5k
88.7k
3741 TA01a
12.1k
150μF
2
10nF
RNTC
100μF
VIN
14V TO 36V
VOUT
10V
20A
1μF
SS
RHOT
45.3k
IOUT (A)
0
2
4
6
8
10 12 14 16 18
V
OUT
(V)
6
8
12
10
3741 TA01b
4
2
0
22
20
VIN = 18V
VOUT = 10V
ILIMIT = 20A
VOUT vs IOUT
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LT3742 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual, 2-Phase Step-Down Switching Controller |
| LT3742_1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual, 2-Phase Step-Down Switching Controller Programmable Soft-Start |
| LT3742EUF#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 24-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 切換控制器 系列:PolyPhase® 特色產品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標準包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數:1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
| LT3742EUF#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 24-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 切換控制器 系列:PolyPhase® 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數:1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LT3742EUFPBF | 制造商:Linear Technology 功能描述:Dual, 2-Ph Step-Down Ctrl LT3742EUF |
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