MAX20029B

Automotive Quad/Triple/Quad Low-Voltage Step-Down DC-DC Converters

Four Integrated Power Rails and High Operating Frequency Minimize Solution Size for Multirail Point-of-Load Regulation


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说明

The MAX20029/MAX20029B/MAX20029C power-management ICs (PMICs) integrate four low-voltage, high-efficiency, step-down DC-DC converters. Each of the four outputs is factory or resistor programmable between 0.7V to 4.0V. The MAX20029 has four 1.5A channels, while the MAX20029B has two 1.5A/3.0A channels and MAX20029C has four 1.5A channels with low VOUT down to 0.7V. The PMICs operate from 3.0V to 5.5V, making them ideal for automotive point-of-load and post-regulation applications.

The PMICs feature fixed-frequency PWM-mode operation with a switching frequency of 2.2MHz. High-frequency operation allows for an all-ceramic capacitor design and small-size external components. The low-resistance on-chip switches ensure high efficiency at heavy loads while minimizing critical inductances, making the layout a much simpler task with respect to discrete solutions. Internal current sensing and loop compensation reduce board space and system cost.

The PMICs offer a spread-spectrum option to reduce radiated emissions. Two of the four buck converters operate 180° out-of-phase with the internal clock. This feature reduces the necessary input capacitance and improves EMI as well. All four buck converters operate in constant PWM mode outside the AM band. The PMICs offer a SYNC input to synchronize to an external clock.

The PMICs provide individual enable inputs and power-good/reset outputs, as well as factory-programmable PG times.

The PMICs offer several important protection features including: input overvoltage protection, input undervoltage lockout, cycle-by-cycle current limiting, and overtemperature shutdown.

The MAX20029/MAX20029B/MAX20029C PMICs are available in a 28-pin TQFN package with an exposed pad and are specified for operation over the -40°C to +125°C automotive temperature range.

关键特性

  • Quad Step-Down DC-DC Converters with Integrated FETs
  • Operate from 3.0V to 5.5V Supply Voltage
  • 1.0V to 4.0V Fixed or Adjustable Output Voltage
  • 2.2MHz Switching Frequency
  • MAX20029: Up to Four 1.5A Channels
  • MAX20029B: Up to One 3A + Two 1.5A Channels
  • MAX20029C: Up to Four 1.5A Channels with low 0.7V VOUT
  • Designed to Improve Automotive EMI Performance
    • Forced-PWM Operation
    • Two Channels 180° Out-of-Phase
    • SYNC Input
    • Spread-Spectrum Option
  • Soft-Start and Supply Sequencing Reduces Inrush Current
  • Individual Enable Inputs and Power-Good Outputs to Simplify Sequencing
  • OV Input-Voltage Monitoring
  • Overtemperature and Short-Circuit Protection
  • 28-Pin (5mm × 5mm x 0.8mm) TQFN-EP Package
  • -40°C to +125°C Operating Temperature Range

应用

  • 汽车
  • 工业
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingPower Good SignalDC-DC OutputsOper. Freq.
(kHz)
Design ToolsPackage/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX20029 NEW!35.514100mV steps
Preset
Resistor
1.5InternalYesYes42200EE-Sim
TQFN/28
$1.30 @1k
MAX20029B NEW!1433
TQFN/28
MAX20029C NEW!0.73.81.54
TQFN/28
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。


MAX20029CEVKIT: Evaluation Kit for the MAX20029/MAX20029C
MAX20029EVKIT: Evaluation Kit for the MAX20029/MAX20029C

质量和环境数据

申请可靠性报告: MAX20029B 
无铅封装的锡(Sn)晶须报告

工具和模型

  • EE-Sim: MAX20029B 设计和仿真
  • 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。

    质量管理体系 >
    环境管理体系 >

     
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