同步降压型开关稳压器MAX15058特性

     该MAX15058高效率，电流模式，同步降压型开关稳压器，集成电源开关的输出提供高达3A的电流。该器件工作在2.7V至5.5V，并提供从0.6V输出电压高达94%的输入电压，使得对于分布式电源系统，便携式设备和预稳压应用的理想选择。

　　该MAX15058采用了具有高增益跨导误差放大器电流模式控制架构。电流模式控制架构，方便易于补偿设计，并确保快速响应的电压和负载瞬态逐周期电流限制。

　　MAX15058提供可选择的跳过模式功能，以减少电流消耗，实现在轻输出负载更高的效率。低的RDS(ON)的集成开关在重负载确保高效率，同时限度地减少关键的电感，使布局设计方面的分立解决方案更简单的任务。利用一个简单的布局和占位面积，保证通过在新设计的成功。

　　该MAX15058具有1MHz的，工厂修剪，固定频率PWM模式操作。高开关频率，随着PWM电流模式架构，允许一个紧凑，全陶瓷电容设计。

　　MAX15058提供的电容可编程软启动降低浪涌电流，启动到预偏置操作，以及的PGOOD开漏输出，可作为电力中断和排序的。

　　该MAX15058可在9焊球(3 × 3阵列)，1.65毫米×一点六五毫米WLP封装，规定工作在-40 ° C至+85 ° C温度范围。

　　关键特性

　　●内部30mΩ(典型值)的RDS(ON)的高侧和5V时18mΩ(典型值)低边MOSFET

　　●连续3A输出电流在整个温度范围

　　●95%的效率与3.3V输出在3A

　　●1%输出负载，线路和温度电压

　　●工作于2.7V至5.5V电源

　　●逐周期过流保护

　　●可调输出0.6V至VIN的高达0.94 x

　　●可编程软启动

　　●工厂校准，1MHz的开关频率

　　●稳定低ESR的陶瓷输出电容器

　　●安全，启动进入预偏置输出

　　●外部参考输入

　　●跳过模式功能

　　●使能输入/电源就绪输出

　　●充分保护，以防止过流和过热

　　●输入欠压锁定

　　英文资料

　　The MAX15058 high-efficiency, current-mode, synchronous step-down switching regulator with integrated power switches delivers up to 3A of output current. The device operates from 2.7V to 5.5V and provides an output voltage from 0.6V up to 94% of the input voltage, making the device ideal for distributed power systems, portable devices, and preregulation applications.

　　The MAX15058 utilizes a current-mode control architecture with a high-gain transconductance error amplifier. The current-mode control architecture facilitates easy compensation design and ensures cycle-by-cycle current limit with fast response to line and load transients.

　　The MAX15058 offers selectable skip-mode functionality to reduce current consumption and achieve a higher efficiency at light output load. The low RDS(ON) integrated switches ensure high efficiency at heavy loads while minimizing critical inductances, making the layout design a much simpler task with respect to discrete solutions. Utilizing a simple layout and footprint assures first-pass success in new designs.

　　The MAX15058 features a 1MHz, factory-trimmed, fixed-frequency PWM mode operation. The high switching frequency, along with the PWM current-mode architecture, allows for a compact, all-ceramic capacitor design.

　　The MAX15058 offers a capacitor-programmable soft-start reducing inrush current, startup into PREBIAS operations, and a PGOOD open-drain output that can be used as an interrupt and for power sequencing.

　　The MAX15058 is available in a 9-bump (3 x 3 array), 1.65mm x 1.65mm WLP package and is specified over the -40°C to +85°C temperature range.   

　　关键特性

　　●Internal 30mΩ (typ) RDS(ON) High-Side and 18mΩ (typ) Low-Side MOSFETs at 5V

　　●Continuous 3A Output Current Over Temperature

　　●95% Efficiency with 3.3V Output at 3A

　　●1% Output Voltage Accuracy Over Load, Line, and Temperature

　　●Operates from 2.7V to 5.5V Supply

　　●Cycle-by-Cycle Overcurrent Protection

　　●Adjustable Output from 0.6V to Up to 0.94 x VIN

　　●Programmable Soft-Start

　　●Factory-Trimmed, 1MHz Switching Frequency

　　●Stable with Low-ESR Ceramic Output Capacitors

　　●Safe-Startup Into Prebiased Output

　　●External Reference Input

　　●Skip-Mode Functionality

　　●Enable Input/Power-Good Output

　　●Fully Protected Against Overcurrent and Overtemperature

　　●Input Undervoltage Lockout

 

资料：