R1290 系列
三路输出LCD/CCD用的DC/DC转换器

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  • 概述

    The R1290 Series are triple output CMOS-based step-up/inverting DC/DC converters. R1290 consists of the inductor type PWM step-up DC/DC converter (DC/DC1) with an internal 2A Nch. driver and charge pump type positive/negative DC/DC converters (DC/DC2, DC/DC3). Triple output start-up sequence can be set by external capacitors. R1290 is ideally suitable for use in power source for equipment that requires sequence control such as LCD and CCD.

  • 规格
    消费 车载
    输入电压范围 2.0 V to 5.5 V (6.5 V)
    工作温度范围 -40°C to 95°C (125°C) -40°C to 105°C (125°C)
    电源电流 Typ. 3.5 mA
    待机电流 Typ. 0.1 µA
    输出电压范围 Boost DC/DC: Max. 20 V (Externally Adjustable)
    反馈电压 1.0 V
    反馈电压精度 ±15 mV
    反馈电压温度系数 Typ. ±150 ppm/°C
    驱动器导通电阻 Typ. 150 mΩ
    振荡器频率 Externally Adjustable: 180 kHz to 1.4 MHz
    封装 QFN0404-24
    Charge-pump Output Voltage Adjustable with external resistors
    Charge-pump VREF/CPPFB Voltage Temperature Coefficient VREF Voltage Temperature Coefficient: Typ. 150 ppm/°C
    CPPFB Voltage Temperature Coefficient: Typ. 150 ppm/°C
    Charge-pump Oscillator Frequency 1/4 of the main step-up DC/DC converter oscillator frequency

    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

      For external parts, please refer to the datasheet.

  • 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 Boost
输入电压
min (V)
2.0
输入电压
max (V)
5.5
输出电压
max (V)
20
消费电流
(µA)
3500