Maxim
›
产品
›
电源管理
›
›
MAX797

MAX797

同步整流降压型控制器，用于CPU电源

对于新设计推荐使用性能更好的器件：MAX1652/MAX1653/MAX1654/MAX1655

下载数据手册
订阅

点击查看特定型号的库存状况。

概述

说明

The MAX796/MAX797/MAX799 high-performance, step-down DC-DC converters with single or dual outputs provide main CPU power in battery-powered systems. These buck controllers achieve 96% efficiency by using synchronous rectification and Maxim's proprietary Idle Mode™ control scheme to extend battery life at full-load (up to 10A) and no-load outputs. Excellent dynamic response corrects output transients caused by the latest dynamic-clock CPUs within five 300kHz clock cycles. Unique bootstrap circuitry drives inexpensive N-channel MOSFETs, reducing system cost and eliminating the crowbar switching currents found in some PMOS/NMOS switch designs.

The MAX796/MAX799 are specially equipped with a secondary feedback input (SECFB) for transformer-based dual-output applications. This secondary feedback path improves cross-regulation of positive (MAX796) or negative (MAX799) auxiliary outputs.

The MAX797 has a logic-controlled and synchronizable fixed-frequency pulse-width-modulating (PWM) operating mode, which reduces noise and RF interference in sensitive mobile-communications and pen-entry applications. The SKIP-bar override input allows automatic switchover to idle-mode operation (for high-efficiency pulse skipping) at light loads, or forces fixed-frequency mode for lowest noise at all loads.

The MAX796/MAX797/MAX799 are all available in 16-pin DIP and narrow SO packages. See the table below to compare these three converters.
MAX796、MAX797、MAX799：典型工作电路 MAX796、MAX797、MAX799：典型工作电路 放大+

关键特性

  • 96% Efficiency
  • 4.5V to 30V Input Range
  • 2.5V to 6V Adjustable Output
  • Preset 3.3V and 5V Outputs (at up to 10A)
  • Multiple Regulated Outputs
  • +5V Linear-Regulator Output
  • Precision 2.505V Reference Output
  • Automatic Bootstrap Circuit
  • 150kHz/300kHz Fixed-Frequency PWM Operation
  • Programmable Soft-Start
  • 375µA Typ Quiescent Current (VIN = 12V, VOUT = 5V)
  • 1µA Typ Shutdown Current

应用

  • 蜂窝电话
  • 笔记本电脑和亚笔记本电脑
  • PDA与移动通信

参数规格

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
MAX797 4.5302.56
3.3
5
Preset
Resistor
10ExternalYes1340
CDIP/16
DICE SALES
PDIP/16
SOIC (N)/16
WAFER UNSAWN
$5.85 @1k
查看所有Step-Down Switching Regulators (404)
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


MAX797EVKIT: MAX797评估板

技术资料

应用笔记 930 Synchronous Buck-Regulator Output Terminates High-Speed Data Buses
应用笔记 851 电池充电器以大于96%的效率提供2.5A电流

质量和环境数据

产品可靠性报告: MAX797.pdf 
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。

质量管理体系 >
环境管理体系 >

订购

 
Status:
Package:
Temperature:

相关资料

相关产品

新产品


MAX20075D
36V, 600mA/1.2A Mini Buck Converter with 3.5µA IQ

  • Synchronous DC-DC Converter with Integrated FETs
  • 20ns Minimum On-Time Small Solution Size Saves Space
  • PGOOD Output and High-Voltage EN Input Simplify Power Sequencing

MAX20076E
36V, 600mA/1.2A Mini Buck Converter with 3.5µA IQ

  • Synchronous DC-DC Converter with Integrated FETs
  • 20ns Minimum On-Time Small Solution Size Saves Space
  • PGOOD Output and High-Voltage EN Input Simplify Power Sequencing

MAX25276D
36V, 600mA/1.2A Mini Buck Converter with 3.5µA IQ

  • Synchronous DC-DC Converter with Integrated FETs
  • 20ns Minimum On-Time Small Solution Size Saves Space
  • PGOOD Output and High-Voltage EN Input Simplify Power Sequencing

MAX20076D
36V, 600mA/1.2A Mini Buck Converter with 3.5µA IQ

  • Synchronous DC-DC Converter with Integrated FETs
  • 20ns Minimum On-Time Small Solution Size Saves Space
  • PGOOD Output and High-Voltage EN Input Simplify Power Sequencing

MAXM17720
Integrated 4V-60V, 150mA, Himalaya uSLIC Power Module DC-DC Converter with 50mA Linear Regulator

  • Easy to Use
  • High Efficiency
  • Flexible Design

MAXM17724
Integrated 4V-60V, 150mA, Himalaya uSLIC Power Module DC-DC Converter with 50mA Linear Regulator

  • Easy to Use
  • High Efficiency
  • Flexible Design

MAXM17712
Integrated 4V-60V, 150mA, Himalaya uSLIC Power Module DC-DC Converter with 50mA Linear Regulator

  • Easy to Use
  • High Efficiency
  • Flexible Design

MAXM15068
7.5V to 60V, 200mA Himalaya uSLIC Step-Down Power Module

  • Easy to Use
  • High Efficiency
  • Flexible Design

MAXM17633
4.5V to 36V, 2A Himalaya uSLIC Step-Down Power Modules

  • Easy to Use
  • High Efficiency
  • Flexible Design

MAXM17635
4.5V to 36V, 2A Himalaya uSLIC Step-Down Power Modules

  • Easy to Use
  • High Efficiency
  • Flexible Design

MAXM17634
4.5V to 36V, 2A Himalaya uSLIC Step-Down Power Modules

  • Easy to Use
  • High Efficiency
  • Flexible Design

MAXM17537
4.5V to 60V, 3A High-Efficiency, DC-DC Step-Down SiP Power Module with Integrated Inductor

  • Reduces Design Complexity, Manufacturing Risks, and Time to Market
  • Saves Board Space in Space-Constrained Applications
  • Offers Flexibility for Power-Design Optimization

MAXM17630
4.5V to 36V, 1A Himalaya uSLIC Step-Down Power Module

  • Easy to Use
  • High Efficiency
  • Flexible Design

MAXM17631
4.5V to 36V, 1A Himalaya uSLIC Step-Down Power Module

  • Easy to Use
  • High Efficiency
  • Flexible Design

MAXM17632
4.5V to 36V, 1A Himalaya uSLIC Step-Down Power Module

  • Easy to Use
  • High Efficiency
  • Flexible Design

MAX20473
Low-Voltage Synchronous Boost Converter

  • Synchronous Boost Converter
  • 3.0V to 4.0V Operating Supply Voltage
  • True Output Shutdown

MAX17662
3.5V to 36V, 2A, High-Efficiency, Synchronous Step-Down DC-DC Converter

  • Reduces External Components and Total Cost
  • Reduces Number of DC-DC Regulators to Stock
  • Reduces Power Dissipation

MAX77504
14V Input, 3A High-Efficiency Buck Converter in WLP or QFN

  • 3A Single-Channel Buck Regulator
  • 2.6V to 14V Input Voltage
  • 0.6V to 6V Output Voltage Range

MAX20458
36V Boost Controller with 3.5A Synchronous Buck Converter For Automotive Applications

  • Meets Stringent OEM Module Power Consumption and Performance Specifications
  • Enables Crank-Ready Designs
  • EMI Reduction Features Reduce Interference with Sensitive Radio Bands without Sacrificing Wide Input Voltage Range

MAX20057
36V Boost Controller with Dual 3.5A/2A Synchronous Buck Converters for Automotive Applications

  • Meets Stringent OEM Module Power Consumption and Performance Specifications
  • Enables Crank-Ready Designs
  • Integration and Thermally Enhanced Packages Save Board Space and Cost

MAX17631
4.5V to 36V, 1.5A, High-Efficiency, Synchronous Step-Down DC-DC Converter

  • Reduces External Components and Total Cost
  • Reduces Number of DC-DC Regulators to Stock
  • Reduces Power Dissipation

MAX17634A
4.5V to 36V, 4.25A, High-Efficiency, Synchronous Step-Down DC-DC Converter

  • Reduces External Components and Total Cost
  • Reduces Number of DC-DC Regulators to Stock
  • Reduces Power Dissipation

MAX17634B
4.5V to 36V, 4.25A, High-Efficiency, Synchronous Step-Down DC-DC Converter

  • Reduces External Components and Total Cost
  • Reduces Number of DC-DC Regulators to Stock
  • Reduces Power Dissipation

MAX17634C
4.5V to 36V, 4.25A, High-Efficiency, Synchronous Step-Down DC-DC Converter

  • Reduces External Components and Total Cost
  • Reduces Number of DC-DC Regulators to Stock
  • Reduces Power Dissipation

MAX77501
110VPK-PK High-Efficiency Piezo Haptic Actuator Boost Driver

  • 110VPK-PK Haptic Waveforms Generation
  • Optimized for up to 2µF Haptic Piezo Actuator
  • 2.8V to 5.5V Input Supply Range

MAX20457
36V Dual 3.5A/2A Synchronous Buck Converters for Automotive Applications

  • Meets Stringent OEM Module Power Consumption and Performance Specifications
  • Enables Crank-Ready Designs
  • EMI Reduction Features Reduce Interference with Sensitive Radio Bands without Sacrificing Wide Input-Voltage Range

MAXM17536
4.5V to 60V, 4A High-Efficiency, DC-DC Step-Down SiP Power Module with Integrated Inductor

  • Reduces Design Complexity, Manufacturing Risks, and Time-to-Market
  • Saves Board Space in Space-Constrained Applications
  • Offers Flexibility for Power-Design Optimization

MAX17576
4.5V to 60V, 4A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation

  • Reduces External Components and Total Cost
  • Reduces Number of DC-DC Regulators to Stock
  • Reduces Power Dissipation

MAX20412
Automotive Low-Voltage 2-Channel Step-Down Controller

  • 2-Channel, High-Efficiency DC-DC Controller in a Small Solution Size
  • High-Precision Regulator for Applications Processors
  • Low-Noise Features Reduce EMI

MAX20343
超低静态电流、低噪声、3.5W升/降压调节器

  • 延长系统运行时间
  • 低、连续噪声特性
  • 自适应负载瞬态响应

MAX20004E
36V, 220kHz to 2.2MHz, 4A/6A/8A Fully Integrated Automotive Step-Down Converters

  • Multiple Functions for Small Size
  • High Precision
  • Robust for the Automotive Environment

MAX20006E
36V, 220kHz to 2.2MHz, 4A/6A/8A Fully Integrated Automotive Step-Down Converters

  • Multiple Functions for Small Size
  • High Precision
  • Robust for the Automotive Environment

MAX20008E
36V, 220kHz to 2.2MHz, 4A/6A/8A Fully Integrated Automotive Step-Down Converters

  • Multiple Functions for Small Size
  • High Precision
  • Robust for the Automotive Environment

MAX17630
4.5V to 36V, 1A, High-Efficiency, Synchronous Step-Down DC-DC Converter

  • Reduces External Components and Total Cost
  • Reduces Number of DC-DC Regulators to Stock
  • Reduces Power Dissipation

MAX20011
Automotive Single 8A/12A Step-Down Converter with High Efficiency

  • High-Efficiency DC-DC Converter
  • Up to 12A peak output current:
  • Differential Remote Voltage Sensing

MAX20079
Automotive 36V 3.5A Buck Converter with 3.5μA IQ

  • Synchronous DC-DC Converter with Integrated FETs
  • Small Solution Size Saves Space
  • PGOOD Output and High-Voltage EN Input Simplify Power Sequencing

MAX15158Z
High-Voltage Multiphase Boost Controller

  • Wide Operating Range
  • Integration Reduces Design Footprint
  • Robust Fault Protection Improves Quality and Reliability

技术文档

参考设计

类型 编号 标题
评估板1192MAX797EVKIT MAX797评估板
评估板1191MAX796EVKIT MAX796、MAX799评估板