MAX16922

2.2MHz、双通道、降压型DC-DC转换器,带有两路LDO和/RESET功能

四通道汽车应用转换器,采用5mm x 5mm封装


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说明

MAX16922电源管理集成电路(PMIC)专为中等电压汽车应用而设计,在小尺寸封装中集成了多路电源。器件包含一个高压降压转换器(OUT1)和三个级联连接的低压DC-DC转换器(OUT2、OUT3、OUT4)。OUT1和OUT2是降压DC-DC转换器,OUT3/OUT4是线性稳压器。器件还包含一路复位输出(/RESET)以及一路高压使能输入(EN)。

输出电流为1.2A的高效率、降压DC-DC转换器(OUT1)工作在最高28V电压,具有瞬态电压高达45V的抛负载保护。输出电流为600mA的高效率、降压DC-DC转换器(OUT2)工作在最高5.5V电压。两路300mA LDO线性稳压器的压差仅为130mV (典型值)。电源就绪/RESET输出能够监测OUT1和OUT2的电压。

OUT1和OUT2采用2.2MHz较快的PWM开关频率以及小尺寸外部元件。高压转换器(OUT1)在轻载时自动进入跳脉冲模式,以避免输出端发生过压故障。低压同步DC-DC转换器(OUT2)可以工作在强制PWM模式(以避免AM频带干扰)或高效率自动PWM模式。

MAX16922具有过热关断和过流限制功能。器件工作在-40°C至+125°C温度范围。
MAX16922:典型工作电路 MAX16922:典型工作电路 放大+

关键特性

  • 1.2A、高效率、2.2MHz DC-DC转换器
    • 3.7V至28V工作电压范围
    • 具有45V抛负载保护
    • 输出电压范围:3.0V至5.5V
  • 600mA、高效率、2.2MHz DC-DC转换器
    • 2.7V至5.5V工作电压范围
    • 输出电压范围:1.0V至3.9V
    • 180°错相工作方式
    • 强制PWM和自动PWM工作模式
  • LDO线性稳压器
    • OUT3:1.0V至4.15V、300mA输出
    • OUT4:1.0V至4.15V、300mA输出
    • 独立输入可提高效率
  • 使能输入
  • /RESET输出可监测OUT1和OUT2
  • 过热及短路保护
  • 器件采用
    • 5mm × 5mm × 0.8mm、20引脚TQFN-EP封装
    • 4.5mm × 6.5mm、20引脚TSSOP-EP封装

应用

  • 汽车
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingDC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX16922 3.7283550mV stepsPreset1.2InternalYes22200
TQFN/20
TSSOP/20
$5.55 @1k
查看所有Step-Down Switching Regulators (367)
Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。


MAX16922EVKIT: MAX16922评估板
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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类型 编号 PDF 标题
应用笔记 4608 MAX16922 PMIC布线指南及示例
类型 编号 标题
评估板6645MAX16922EVKIT MAX16922评估板