Dual Regulator–Synchronous Rectified Buck PWM and Linear Power Controllers

The ISL6529, ISL6529A provide the power control and protection for two output voltages in high-performance graphics cards and other embedded processor applications. The dual-output controllers drive two N-Channel MOSFETs in a synchronous rectified buck converter topology and one N-Channel MOSFET in a linear configuration. The ISL6529, ISL6529A provide both a regulated high current, low voltage supply and an independent, lower current supply integrated in a 14-lead SOIC package. The controllers are ideal for graphic card applications where regulation of both the graphics processing unit (GPU) and memory supplies is required.

Features

• Provides two regulated voltages

- One synchronous rectified buck PWM controller

- One linear controller

• Both controllers drive low cost N-Channel MOSFETs

• 12V direct drive saves external components

• Small converter size

- 600kHz constant frequency operation

- Small external component count

• Excellent output voltage regulation

- Both outputs: ±1 over temperature - ISL6529AC

- Both outputs: ±2 over temperature - ISL6529C

• 5V down conversion

• PWM and linear output voltage range: down to 0.8V

• Simple single-loop voltage-mode PWM control design

• Fast PWM converter transient response

- High-bandwidth error amplifier

- Full 0-100 duty ratio

• Linear controller drives N-Channel MOSFET pass transistor

• Fully-adjustable outputs

• Undervoltage fault monitoring on both outputs

• QFN Package:

- Compliant to JEDEC PUB95 MO-220

QFN - Quad Flat No Leads - Package Outline

- Near Chip Scale Package footprint, which improves

PCB efficiency and has a thinner profile

• Pb-Free Available (RoHS Compliant)

Applications

• Graphics–GPU and memory supplies

• ASIC power supplies

• Embedded processor and I/O supplies

• DSP supplies

ISL6529ACR属于集成电路（IC） > 稳压器 - 线性 + 开关。瑞萨科技有限公司制造生产的ISL6529ACR稳压器 - 线性 + 开关此产品族中的产品用于构建执行 DC-DC 转换或电压调节功能的电路，采用的是开关模式和线性稳压器功能的组合。虽然具体的拓扑各不相同，但此类产品的主要目的是将开关模式技术的效率优势与线性稳压技术的低噪声特性结合在一起。