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IR3822MPBF

IR3822MPBF

  • 厂商:

    IRF

  • 封装:

  • 描述:

    IR3822MPBF - HIGHLY INTEGRATED 4A WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR - International Rec...

  • 详情介绍
  • 数据手册
  • 价格&库存
IR3822MPBF 数据手册
PD-60333 IR3822MPBF SupIRBuck Features • • • • • • • • • • • • • • TM HIGHLY INTEGRATED 4A Description The IR3822 SupIRBuckTM is an easy-to-use, fully integrated and highly efficient DC/DC regulator. The onboard switching controller and MOSFETs make the IR3822 a space-efficient solution, providing accurate power delivery for low output voltage applications. The IR3822 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 4A. A versatile regulator offering programmability of startup time, power good threshold and current limit, the IR3822’s fixed 600kHz switching frequency allows the use of small external components. The IR3822 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 4A Load Capability 600kHz High Frequency Operation Programmable Over-Current Protection Programmable PGood Output 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 • • • • • • • • Distributed Point-of-Loads Server and Workstations Embedded Systems Storage Systems DDR Applications Graphics Cards Game Consoles Computing Peripheral Voltage Regulators Fig. 1. Typical application diagram 01/08/08 1 PD-60333 IR3822MPBF ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND) • • • • • • • • • • • • VIN Supply Voltage Vcc Supply Voltage Vc Supply Voltage SW PGood Fb,COMP,SS,Vsns 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 16V -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 Vsns 15 AGnd 9 8 PGood VCC 2 3 4 5 6 7 FB COMP AGnd AGnd SS OCSet Fig. 2: Package outline (Top view) ORDERING INFORMATION PKG DESIG M PACKAGE DESCRIPTION IR3822MTRPBF PIN COUNT 15 PARTS PER TUBE --------------PARTS PER REEL 4000 01/08/08 2 PD-60333 IR3822MPBF Block Diagram Fig. 3. Simplified block diagram of the IR3822. 01/08/08 3 PD-60333 IR3822MPBF Pin Description Pin Name 1 2 Vsns Fb Description PGood sense pin. Use two external resistors to program the power good threshold. 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). Power Good status pin. Output is open collector. Connect a pull up resistor from this pin to Vcc. 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. 3 4 5 6 Comp AGnd AGnd SS/SD 7 8 OCSet VCC PGood 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. 01/08/08 4 PD-60333 IR3822MPBF 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 4 125 Units V A C o Electrical Specifications Unless otherwise specified, these specification apply over Vin=Vcc=Vc=12V, 0oC
IR3822MPBF
1. 物料型号: - 型号:IR3822MTRPBF

2. 器件简介: - IR3822是一款高度集成的4A宽输入电压同步Buck调节器,具有600kHz的高频率操作,提供了精确的低输出电压应用的电力传输解决方案。该器件包含开关控制器和MOSFET,具有节省空间的优势。

3. 引脚分配: - Vsns:PGood感应引脚,使用两个外部电阻设定电源良好阈值。 - Fb:误差放大器的反相输入,连接到调节器的输出,设置输出电压并提供反馈。 - Comp:误差放大器的输出。 - AGnd:信号地,用于内部参考和控制电路。 - SS/SD:软启动/关机引脚,提供用户可编程的软启动功能。 - OCSet:电流限制设定点,通过外部电阻设定电流限制阈值。 - Vcc:为IC内部模块提供偏置电压,同时为低端驱动器供电。 - PGood:电源良好状态引脚,输出为开路集电极。 - PGnd:电源地,连接到系统的电源地平面。 - SW:开关节点,连接到输出电感。 - VIN:输入电压连接引脚。 - HG:连接到高端MOSFET门。 - Vc:高端驱动器供电引脚,必须连接到高于输入电压的电压。 - AGnd:信号地,用于内部参考和控制电路。

4. 参数特性: - 工作输入电压范围:2.5V至21V - 工作输出电压范围:0.6V至12V - 连续4A负载能力 - 600kHz高频率操作 - 精确参考电压(0.6V) - 可编程软启动 - 热保护 - 热增强型封装,小型尺寸5mmx6mm QFN,无铅(RoHS合规)

5. 功能详解: - IR3822具有重要的保护功能,如预偏置启动、电流限制和热关闭,以在故障条件下提供所需的系统级安全。

6. 应用信息: - 分布式点负载、服务器和工作站、嵌入式系统、存储系统、DDR应用、图形卡、游戏控制台、计算外设电压调节器。

7. 封装信息: - 5mm x 6mm POWER QFN封装,热导率$\theta_{J A}=35^{\circ} C / W$ 和 $\theta_{J-P C B}=2^{\circ} C / W$。
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