RT9203AGS

RT9203AGS

  • 厂商:

    RICHTEK(台湾立锜)

  • 封装:

  • 描述:

    RT9203AGS - Dual Regulators - Synchronous Buck PWM DC-DC and Linear Controller - Richtek Technology ...

  • 详情介绍
  • 数据手册
  • 价格&库存
RT9203AGS 数据手册
Preliminary RT9203/A Dual Regulators - Synchronous Buck PWM DC-DC and Linear Controller General Description The RT9203/A is a dual-output power controllers designed for high performance graphics cards and personal computers. The IC integrates a synchronous buck controller, a linear controller and protection functions into a small 8-pin package. The RT9203/A uses an internal compensated voltage mode PWM control for simplying design. An internal 0.8V reference allows the output voltage to be precisely regulated to meet low output voltage requirement. A fixed 300kHz oscillation frequency reduces the component size for saving board area. The RT9203/A also features over voltage protection (OVP) and under voltage lock-out (UVLO). Features l l l l l l l l l l l l Operates at 5V 0.8V Internal Reference Drives Two N-MOSFET Voltage Mode PWM Control Fast Transient Response Fixed 300kHz Oscillator Frequency Dynamic 0 to 100% Duty Cycle Internal PWM Loop Compensation Internal Soft-Start Adaptive Non-Overlapping Gate Driver Over-Voltage Protection Uses Lower MOSFET RoHS Compliant and 100% Lead (Pb)-Free Applications l l l l Ordering Information RT9203/A Package Type S : SOP-8 Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commercial Standard) UVP : Hiccup Mode UVP : Latch Mode Note : RichTek Pb-free and Green products are : }RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020. }Suitable for use in SnPb or Pb-free soldering processes. }100%matte tin (Sn) plating. l l l l l PC Motherboard Cable Modems, Set-Top-Box, and DSL Modems DSP and Core Communications Processor Supplies Memory Power Supplies Personal Computer Peripherals Industrial Power Supplies 5V Input DC-DC Regulators Low Voltage Distributed Power Supplies Graphic Cards Pin Configurations (TOP VIEW) BOOT UGATE GND LGATE 2 3 4 8 7 6 5 FB FBL DRV VCC SOP-8 DS9203/A-10 March 2007 www.richtek.com 1 www.richtek.com 2 RT9203/A 5V 5V Typical Application Circuit 5V + 1uF 1N5819 5 + VCC 6 PHASE UGATE 4 8 1uF D2 5 Phase 2 2 G1 3 S2 4 G2 D1 7 D2 6 1uF BOOT 1 680uF 5uH P hase PHKD6N02LT 0.1uF 8 1 S1 D1 100uF 1uH Be Careful during Layout 2SD1802 VOUT1 1.6V VOUT2 FBL FB RT9203/A G ND 120
RT9203AGS
物料型号: - 型号为RT9203/A,由Richtek公司生产。

器件简介: - RT9203/A是一款双输出电源控制器,专为高性能显卡和个人电脑设计。该集成电路集成了同步降压控制器、线性控制器和保护功能,封装在一个小的8脚封装中。RT9203/A使用内部补偿的电压模式PWM控制,简化了设计。内部0.8V的参考电压允许输出电压被精确调节,满足低输出电压要求。固定的300kHz振荡频率减小了组件尺寸,节省了板面空间。RT9203/A还具有过压保护(OVP)和欠压锁定(UVLO)功能。

引脚分配: - BOOT (Pin 1):为上MOSFET驱动提供地参考偏置电压。 - UGATE (Pin 2):连接到上MOSFET的栅极,提供上MOSFET的栅极驱动。 - GND (Pin 3):IC的信号和电源地。 - LGATE (Pin 4):连接到下MOSFET的栅极,提供下MOSFET的栅极驱动。 - VCC (Pin 5):RT9203/A的主要偏置电源,也为下MOSFET的栅极提供偏置电荷。 - DRV (Pin 6):线性控制器的输出,应连接到外部旁路NPN晶体管的基极或N-MOSFET的栅极,形成线性低dropout调节器。 - FBL (Pin 7):连接到外部电源晶体管或基于N-MOSFET的低dropout调节器的输出电阻分压器,用于调节和监控输出电压。 - FB (Pin 8):连接到PWM转换器的输出分压器,用于调节和监控降压转换器的输出电压。

参数特性: - 工作在5V电压下。 - 内部0.8V参考电压。 - 固定300kHz振荡频率。 - 动态0到100%占空比。 - 内部PWM环补偿。 - 内部软启动。 - 自适应非重叠门驱动。 - 过压保护使用下MOSFET。 - 符合RoHS标准,无铅(Pb)。

功能详解: - RT9203/A在单5V电源供电或5V/12V双电源供电下工作。在双电源供电下,RT9203/A可以提供更高的门驱动电流,适用于高电流应用。 - 内置软启动功能,用于防止电源输入时的浪涌电流。 - 电压在FB引脚处被监控并受到OC(过电流)、UV(欠电压)和OV(过电压)保护。

应用信息: - 应用于个人电脑主板、电缆调制解调器、机顶盒和DSL调制解调器、DSP和核心通信处理器电源、内存电源、个人电脑外围设备、工业电源、5V输入DC-DC调节器、低电压分布式电源和显卡。
RT9203AGS 价格&库存

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