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MAX20026

MAX20026, MAX20026S

Automotive Quad, Low-Voltage Step-Down DC-DC Converters with Low-Noise LDO

Four 1A Low-Voltage High-Efficient DC-DC Converters and One Low-Noise 200mA LDO

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概述

说明

The MAX20026/MAX20026S power-management ICs (PMICs) integrate four low-voltage, high-efficiency, step-down DC-DC converters and one low-noise LDO linear regulator. Each of the four step-down DC-DC converter outputs is factory set and can deliver up to 1.0A of current. The LDO linear regulator output is selectable to 2.5V or adjustable, and can deliver 200mA of current. 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 3.2MHz. 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.

Two of the four buck converters operate 180 degrees 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 one power-good output.

The PMICs offer several important protection features, including input overvoltage protection, input undervoltage monitoring, input undervoltage lockout, cycle-by-cycle current limiting, and overtemperature shutdown. The input undervoltage monitor indicates a brownout condition by driving PGOOD low when the input falls below the undervoltage monitoring (UVM) threshold.

The MAX20026/MAX20026S 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

  • High-Integration Shrinks Solution Size
    • Quad Step-Down DC-DC Converters with Integrated MOSFETs, Capable of Delivering 1.0A Each
    • One 200mA LDO with Adjustable Output Voltage
    • Hybrid Load-Line Architecture Enables Small Output Capacitors
  • Performance Designed for Automotive Point-of-Load Regulation
    • Operates from 3.0V to 5.5V Supply Voltage
    • Individual Enable Signals for Each Output
    • UV/OV/UVM/PGOOD
    • Soft-Start and Supply Sequencing Reduces Inrush Current
  • Low-Noise Features Improve EMI Performance
    • 3.2MHz Switching Frequency
    • Forced-PWM Operation
    • Two Channels 180 Degrees Out-of-Phase
    • SYNC Input
  • Robust for the Automotive Environment
    • 28-Pin (4mm x 4mm x 0.8mm) TQFN-EP Package
    • -40°C to +125°C Operating Temperature Range
    • AEC-Q100 Qualified

应用

  • 汽车
  • 工业

参数规格

Part NumberPrimary TopologyMonitor/Control FeaturesDC-DC/Power FeaturesVOUT
(V)		VOUT
(V)		Max. IOUT
(A)		Oper. Freq.
(kHz)		Package/Pins
minmax
MAX20026 Step-Down
External Synch.
Output OVP
Output UVP
Shutdown
Volt. or PWM Controlled Output
Current Limit
Fixed Freq./PWM
Internal Switch
Soft Start
Sync. Rectifier
1413200
See Data Sheet
查看所有Multifunction PMICs (83)

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)		Package/Pins
minmaxminmax
MAX20026 --14--1InternalYesYes4-
TQFN-CU/28
MAX20026S 35.50.83.8
1.35
3.3
Preset
Resistor
3200
TQFN-CU/28
查看所有Step-Down Switching Regulators (380)
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。

设计资源


MAX20026EVKIT: Evaluation Kit for the MAX20026/MAX20026S

质量和环境数据

申请可靠性报告: MAX20026  MAX20026S 
无铅封装的锡（Sn）晶须报告

质量与环境

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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环境管理体系 >

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参考设计

类型 编号 标题
评估板10328MAX20026EVKIT Evaluation Kit for the MAX20026/MAX20026S