R5220 系列
400mA带开关功能的PWM降压DC/DC转换器

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  • 概述

    The R5220 Series are CMOS-based PWM step-down DC/DC converters with synchronous rectifier. R5220 also has the function of switching to the LDO regulator. By switching with the MODE pin, the device can be used as an LDO regulator (Output Current 50mA) in the smaller output current range, while it can be used as a DC/DC converter (Output Current 400mA*) under high load conditions. (The polarity of the MODE pin is selectable.) The DC/DC converter contains an under-voltage lockout circuit (UVLO), a soft start circuit, and a latch type protection circuit. By simply using an inductor and a capacitor, a high-efficiency DC/DC converter can be easily configured.

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

  • 规格
    消费
    输入电压范围 2.8 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. 350 µA (DC/DC operation)
    Typ. 5.0 µA (LDO operation)
    待机电流 Typ. 0.1 µA
    输出电压范围 1.0 V to 3.3 V (0.1 V step)
    输出电压精度 ±2% (VOUT ≥ 1.5 V, Ta = 25°C)
    ±30 mV (VOUT < 1.5 V)
    输出电流 400 mA (DC/DC operation)
    50 mA (LDO operation)
    驱动器导通电阻 Pch: 0.5 Ω, Nch: 0.5 Ω (VIN = 3.6 V)
    振荡器频率 Typ. 1.2 MHz
    封装 DFN(PLP)2514-6

    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
    • Typical Application

      Typical Application

    • R5220K181A Efficiency vs. Output Current

      R5220K181A 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)
2.8
输入电压
max (V)
5.5
输出电压
min (V)
1.0
输出电压
max (V)
3.3
输出电流
(mA)
400
消费电流
(µA)
350