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IR3801MTR1PbF

IR3801MTR1PbF

  • 厂商:

    IRF

  • 封装:

  • 描述:

    IR3801MTR1PbF - SupIRBuckTM - International Rectifier

  • 详情介绍
  • 数据手册
  • 价格&库存
IR3801MTR1PbF 数据手册
PD-60354 IR3801MPbF SupIRBuck Features • • • • • • • • • • • • • TM HIGHLY INTEGRATED 7A Description The IR3801 SupIRBuckTM is an easy-to-use, fully integrated and highly efficient DC/DC regulator. The onboard switching controller and MOSFETs make the IR3801 a space-efficient solution, providing accurate power delivery for low output voltage applications. The IR3801 operates from a single 4.5V to 14V input supply and generates an output voltage adjustable from 0.6V to 0.75*Vin at loads up to 7A. A versatile regulator offering programmability of startup time, power good threshold and current limit, the IR3801’s fixed 600kHz switching frequency allows the use of small external components. The IR3801 also features important protection functions, such as Pre-Bias startup, hiccup current limit and thermal shutdown to provide the required system level security in the event of fault conditions. WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR Wide Input Voltage Range 2.5V to 21V Wide Output Voltage Range 0.6V to 12V Continuous 7A Load Capability 600kHz High Frequency Operation Programmable Over-Current Protection Hiccup Current Limit Precision Reference Voltage (0.6V) Programmable Soft-Start Pre-Bias Start-up Thermal Protection Thermally Enhanced Package Small Size 5mmx6mm QFN Pb-Free (RoHS Compliant) Applications • • • • • • • • Game Consoles Set-top Boxes Graphics Cards LCD TVs Desktop PCs Distributed Point-of-Loads Embedded Systems Computing Peripheral Voltage Regulators Fig. 1. Typical application diagram 11/04/08 1 PD-60354 IR3801MPbF ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND) • • • • • • • • • • • VIN Supply Voltage Vcc Supply Voltage Vc Supply Voltage SW Fb,COMP,SS OCSet AGnd to PGnd Storage Temperature Range Operating Junction Temperature Range ESD Classification Moisture Sensitivity Level -0.3V to 24V -0.3V to 16V -0.3V to 30V -0.3V to 30V -0.3V to 3.5V 10mA -0.3V to +0.3V -65°C To 150°C -40°C To 150°C JEDEC, JESD22-A114 JEDEC Level 3 @ 260oC Caution: Stresses beyond those listed under “Absolute Maximum Rating” may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to “Absolute Maximum Rating” conditions for extended periods may affect device reliability. PACKAGE INFORMATION 5mm x 6mm POWER QFN 12 VIN 11 SW 10 PGnd θJA = 35 o C / W θJ -PCB = 2 o C / W HG VC 13 14 1 NC 15 AGnd 9 8 NC VCC 2 3 4 5 6 7 FB COMP AGnd AGnd SS OCSet Fig. 2: Package outline (Top view) ORDERING INFORMATION PACKAGE DESIGNATOR M M 11/04/08 PACKAGE DESCRIPTION IR3801MTRPbF IR3801MTR1PbF PIN COUNT 15 15 PARTS PER REEL 4000 750 2 PD-60354 IR3801MPbF Block Diagram Fig. 3. Simplified block diagram of the IR3801. 11/04/08 3 PD-60354 IR3801MPbF Pin Description Pin Name 1 2 NC Fb No Connect Inverting input to the error amplifier. This pin is connected directly to the output of the regulator via resistor divider to set the output voltage and provide feedback to the error amplifier. Output of error amplifier. Signal ground for internal reference and control circuitry. Signal ground for internal reference and control circuitry. Soft start / shutdown. This pin provides user programmable soft-start function. Connect an external capacitor from this pin to signal ground (AGnd) to set the start up time of the output voltage. The converter can be shutdown by pulling this pin below 0.3V. Current limit set point. A resistor from this pin to SW pin will set the current limit threshold. This pin provides biasing voltage for the internal blocks of the IC. It also powers the low side driver. A minimum of 0.1uF, high frequency capacitor must be connected from this pin to power ground (PGnd). No Connect Power Ground. This pin serves as a separated ground for the MOSFET drivers and should be connected to the system’s power ground plane. Switch node. This pin is connected to the output inductor Input voltage connection pin This pin is connected to the high side Mosfet gate. Connect a small capacitor from this pin to switch node (SW). This pin powers the high side driver and must be connected to a voltage higher than input voltage. A minimum of 0.1uF high frequency capacitor must be connected from this pin to the power ground (PGnd). Signal ground for internal reference and control circuitry. Description 3 4 5 6 Comp AGnd AGnd SS/SD 7 8 OCSet VCC NC PGnd SW VIN HG VC AGnd 9 10 11 12 13 14 15 Pins 4, 5 and 15 need to be connected together on system board. 11/04/08 4 PD-60354 IR3801MPbF Recommended Operating Conditions Symbol Vin Vcc Vc Vo Io Note1 Tj Definition Input Voltage Supply Voltage Supply Voltage Output Voltage Output Current Junction Temperature Min 2.5 4.5 Vin + 5V 0.6 0 -40 Max 21 14 28 12 7 125 Units V A C o Electrical Specifications Unless otherwise specified, these specification apply over Vin=Vcc=Vc=12V, 0oC
IR3801MTR1PbF
物料型号: - 型号:IR3801MTRPbF(15引脚,卷带封装,每卷4000个) - 型号:IR3801MTR1PbF(15引脚,卷带封装,每卷750个)

器件简介: - IR3801是一款集成度高的7A宽输入电压同步Buck调节器,具有600kHz的高频率操作能力,提供精确的低压输出应用电源传输。

引脚分配: - 1号引脚:NC(无连接) - 2号引脚:Fb(误差放大器的反相输入,用于设置输出电压和提供反馈) - 3号引脚:Comp(误差放大器的输出) - 4号引脚和5号引脚:AGnd(内部参考和控制电路的信号地) - 6号引脚:SS/SD(软启动/关闭) - 7号引脚:OCSet(电流限制设置点) - 8号引脚:Vcc(内部模块的偏置电压,也供电给低端驱动器) - 9号引脚:NC(无连接) - 10号引脚:PGnd(MOSFET驱动器的独立地,应连接到系统的电源地平面) - 11号引脚:SW(开关节点,连接到输出电感) - 12号引脚:VIN(输入电压连接引脚) - 13号引脚:HG(连接到高端MOSFET栅极) - 14号引脚:Vc(高端驱动器供电,必须连接到高于输入电压的电压) - 15号引脚:AGnd(内部参考和控制电路的信号地)

参数特性: - 宽输入电压范围:2.5V至21V - 宽输出电压范围:0.6V至12V - 连续7A负载能力 - 600kHz高频率操作 - 可编程过电流保护 - 精确参考电压(0.6V) - 可编程软启动 - 预偏置启动 - 热保护

功能详解: - IR3801是一款电压模式同步调节器,具有固定的600kHz开关频率,允许使用较小的外部组件。 - 通过低侧MOSFET的$R_{DS(on)}$进行过电流保护,提高效率并减少成本。 - 内部温度感应提供热关机保护,典型触发阈值设置为140°C。

应用信息: - 游戏控制台、机顶盒、图形卡、液晶电视、台式电脑、分布式点负载、嵌入式系统、计算外设电压调节器。

封装信息: - 5mm x 6mm POWER QFN封装,符合RoHS标准,无铅。
IR3801MTR1PbF 价格&库存

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