Fairchild FAN21SV06 6A同步降压稳压电源方案

Fairchild 公司的FAN21SV06 是高效可编程频率(200-600KHz)的6A同步降压稳压电源,包括有两个同步MOSFET和控制器/驱动器. FAN21SV06的效率大于94%,双电源输入电源从3.0V到24V,输出电压从0.8V到80%输入电压.采用外补偿以方便设计,可应用在服务器和通信,图像卡和显示器,高端计算系统,机顶盒和游戏控制台以及点负载(POL)稳压器.本文介绍了FAN21SV06的主要特性,方框图以及几种主要的应用电路.

The FAN210SV06 TinyBuckTM is a highly efficient, small-footprint,programmable-frequency, 6A integrated synchronous buck regulator.

FAN21SV06 contains both synchronous MOSFETs and a controller/driver with optimized interconnects in one package, which enables designers to solve high-current requirements in a small area with minimal external components, thereby saving cost. On-board internal 5V regulator enables single-supply operation for input voltages >6.5V.

The FAN21SV06 can be configured to drive multiple slave devices OR synchronize to an external system clock. In slave mode, FAN21SV06 may be set up to be free-running in the absence of a master clock signal.

External compensation, programmable switching frequency, and current-limit features allow for design optimization and flexibility. High-frequency operation allows for all ceramic solutions.

Fairchild’s advanced BiCMOS power process combined with low-RDS(ON) internal MOSFETs and a thermally efficient MLP package provide the ability to dissipate high power in a small package. Integration helps to minimize critical inductances making layout simpler and more efficient compared to discrete solutions.

Output over-voltage, under-voltage, over-current and thermal-shutdown protections help protect the device from damage during fault conditions. FAN21SV06 prevents pre-biased output discharge during startup in point-of-load applications.

FAN210SV06主要特性:

Single-Supply Operation with 6A Output Current

Over 94% Efficiency

Fully Synchronous Operation with Integrated Schottky Diode on Low-Side MOSFET Boosts Efficiency

Single Supply Device for VIN > 6.5V–24V

Programmable Frequency Operation (200-600KHz)

Externally Synchronizable Clock with Master/Slave Provisions

Wide Input Range with Dual Supply: 3.0V to 24V

Output Voltage Range: 0.8V to 80%VIN

Power-Good Signal

Accepts Ceramic Capacitors on Output

External Compensation for Flexible Design

Starts Up on Pre-Bias Outputs

Integrated Bootstrap Diode

Programmable Over-Current Protection

Under-Voltage, Over-Voltage, and Thermal-Shutdown Protections

5x6mm, 25-pin, 3-pad MLP

FAN210SV06应用:

Servers & Telecom

Graphics Cards & Displays

High-End Computing Systems

Set-Top Boxes & Game Consoles

Point-of-Load Regulation



图1.FAN210SV06方框图



图2.FAN210SV06典型应用,主控, VIN=6.5V到24V



图3.FAN210SV06单电源应用电路: 1.8V输出, 500KHz, 主控



图4.FAN210SV06双电源应用电路: 1.2V输出, 600KHz, 主控3.3V – 8V 输入