RP505 系列
1A带同步整流器功能的PWM/VFM降压DC/DC转换器

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  • 概述

    The RP505 Series are low supply current CMOS-based PWM/VFM step-down DC/DC converters with synchronous rectifier. RP505 can be selected from two control types by input signal to the MODE pin - forced PWM control or PWM/VFM auto switching control in which mode automatically switches to high-efficiency VFM mode in low output current. The xx1A/B version with an internally fixed output voltage type and the 001C version with an externally adjustable output voltage type are available.

    RP505 includes a soft start circuit, an under-voltage lockout circuit (UVLO), thermal shutdown circuit and a latch protection circuit. By simply using an inductor and capacitors (and resistors) as external components, a high-efficiency step-down DC/DC converter can be easily configured. The small inductor (2.2µH) and output capacitor (10µF) can be used by the switching of 2.25MHz. A 2mm square compact DFN(PLP)2020-8 package is available.

  • 规格
    消费
    输入电压范围 2.3 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. 40 µA (VFM, no load)
    待机电流 Typ. 0 µA
    输出电压范围 Internally Fixed Ver.: 0.6 V to 3.3 V (0.1 V step)
    Externally Adjustable Ver.: 0.8 V to 3.3 V
    输出电压精度 ±1.5% (VOUT ≥ 1.2 V, Ta = 25°C)
    ±18 mV (VOUT < 1.2 V)
    输出电压温度系数 ±100 ppm/°C
    反馈电压 0.6 V
    反馈电压精度 ±9 mV
    反馈电压温度系数 ±100 ppm/°C
    输出电流 1 A
    驱动器导通电阻 Pch: Typ. 0.23 Ω, Nch: Typ. 0.20 Ω (VIN = 3.6 V)
    振荡器频率 Typ. 2.25 MHz
    最大占空比 Min. 100%
    封装 DFN(PLP)2020-8

    保护回路/功能

    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
    • RP505Kxx1A/B Typical Application

      RP505Kxx1A/B Typical Application

    • RP505K001C Typical Application

      RP505K001C Typical Application

    • RP505K331x Efficiency vs. Output Current

      RP505K331x 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。

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功能说明

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

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分类:DC / DC开关稳压器

拓扑结构 Buck
输入电压
min (V)
2.3
输入电压
max (V)
5.5
输出电压
min (V)
0.6
输出电压
max (V)
3.3
输出电流
(mA)
1000
消费电流
(µA)
40