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| 型号： | LT3741IFE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 20TSSOP |
| 标准包装： | 74 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1.07MHz |
| 电源电压： | 6 V ~ 36 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽）裸露焊盘 |
| 包装： | 管件 |
LT3741/LT3741-1
High Power, Constant
Current, Constant Voltage,
Step-Down Controller
Control Pin Provides Accurate Control of Regulated
±1.5% Voltage Regulation Accuracy
±6% Current Regulation Accuracy
6V to 36V Input Voltage Range
Wide Output Voltage Range Up to (V IN – 2V)
Average Current Mode Control
<1μA Shutdown Current
Up to 94% Efficiency
Additional Pin for Thermal Control of Load Current
Thermally Enhanced 4mm × 4mm QFN and 20-Pin
General Purpose Industrial
Super-Cap Charging
Applications Needing Extreme Short-Circuit
Constant Current or Constant Voltage Source
FEATURES
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Output Current
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FE Package
APPLICATIONS
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Protection and/or Accurate Output Current Limit
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DESCRIPTION
The LT ? 3741 and LT3741-1 are fixed frequency synchro-
nous step-down DC/DC controllers 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 (V IN – 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. If sinking current is not required, or for parallel
applications, use the LT3741-1. 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.
TYPICAL APPLICATION
10V/20A Constant Current, Constant Voltage Step-Down Converter
EN/UVLO
EN/UVLO
RT
V IN
1μF
100μF
V IN
14V TO 36V
12
V OUT vs I OUT
LT3741
V REF
V CC_INT
10nF
R HOT
45.3k
R NTC
82.5k
39.2k
5.6nF
10nF
SYNC
CTRL1
VC
SS FB
HG
CBOOT
SW
LG
GND
CTRL2 SENSE +
SENSE –
220nF
22μF
2.2μH
2.5m
88.7k
12.1k
V OUT
10V
20A
150μF
× 2
10
8
6
4
2 V IN = 18V
V OUT = 10V
I LIMIT = 20A
0
0 2 4 6
8 10 12 14 16 18 20 22
I OUT (A)
3741 TA01b
3741 TA01a
37411fe
For more information www.linear.com/LT3741
1
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相关代理商/技术参数 |
参数描述 |
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| LT3741IFE-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Power, Constant Current, Constant Voltage, Step-Down Controller |
| LT3741IUF#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 20-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LT3741IUF#PBF | 制造商:Linear Technology 功能描述:DC-DC CONTROLLER BUCK 1MHZ 制造商:Linear Technology 功能描述:DC-DC CONTROLLER, BUCK, 1MHZ, QFN-20 |
| LT3741IUF#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 20-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LT3741IUF-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Power, Constant Current, Constant Voltage, Step-Down Controller |
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