RP901 系列
带同步整流器功能 配置VR和VD的PWM/VFM降压DC/DC转换器


  • 概述

    The RP901 Series are CMOS-based PWM/VFM step-down DC/DC converters equipped with voltage regulator and voltage detector. The DC/DC converter can be selected from two control types - fixed PWM control or PWM/VFM auto switching control in which mode automatically switches to high-efficiency VFM mode in low output current.

    RP901 was developed for applications that require multiple power supplies such as storage devices. It integrates an 800mA* (A/B/C Version) / 900mA* (D Version) output current step-down DC/DC converter, a 600mA output current LDO regulator, and a voltage detector with a built-in delay circuit into a small package. The regulator can be started after soft start of the DC/DC converter by sequence control. (A/B Version)

    *) This is an approximate value, because output current depending on conditions and external parts.

  • 规格
    输入电压范围 4.5 V to 5.5 V (6.5 V)
    工作温度范围 -40°C to 85°C (125°C)
    电源电流 Typ. 460 µA (at PWM mode)
    Typ. 170 µA (at light load, Ver. B, C, D)
    待机电流 Typ. 1 µA (Ver. A)
    Typ. 2 µA (Ver. B, C, D)
    输出电压范围 DC/DC Section: 1.2 V to 1.8 V (0.1 V step)
    LDO Section: 2.5 V to 3.3 V (0.1 V step)
    输出电压精度 DC/DC Section: ±2% (Ta = 25°C)
    LDO Section: ±1.0%
    输出电流 DC/DC Section:
    800 mA
    900 mA (Ver. D)
    LDO Section: 600 mA
    驱动器导通电阻 Typ. Pch 0.25 Ω, Nch 0.25 Ω (VIN = 5 V)
    振荡器频率 Typ. 1.2 MHz
    封装 DFN(PLP)2527-10
    VD Threshold Range 2.0 V to 3.0 V (Ver. A, supervising LDO output voltage)
    3.0 V to 5.0 V (Ver. B, C, D, supervising input voltage)
    VD Threshold Accuracy ±2%
    Release Delay Time Typ. 50 ms


    TSD ILX OCP OVP UVLO OVLO Reverse Shutdown Soft Start SSCG PGOOD Auto Discharge Anti-ringing Sequencing Max Duty Ext. Phase LED Adjust
  • 技术资料
    • RP901K Efficiency vs. Output Current

      RP901K Efficiency vs. Output Current

  • 品质&封装
    • 有关产品的详细信息,请参见数据表。
    • 封装文件包括封装尺寸,卷带规格,卷带盘尺寸,功耗和建议的焊盘图案。
    • 请联系我们或我们的代理商以获取未发布的可靠性信息。



TSD 热关断电路
ILX LX Current Limit Function
OCP 过流保护
OVP 过压保护
UVLO 欠压锁定功能
OVLO Overvoltage Lockout Protection
Reverse 反向电流保护电路
Shutdown 关机功能
Soft Start 软启动功能
SSCG Spread Spectrum Clock Generator Function
PGOOD Power Good Output
Auto Discharge 自动放电功能
Anti-ringing Anti-ringing Switch Function
Sequencing Start-up Sequencing Control
Max Duty 最大占空比
Ext. Phase 外部可调相位补偿
LED Adjust LED High-speed Dimming Control


分类:DC / DC开关稳压器

拓扑结构 Buck
min (V)
max (V)
min (V)
max (V)