The HIP6521 provides the power control and protection for four output voltages in high-performance microprocessor and computer applications. The IC integrates a voltage-mode PWM controller and three linear controllers, as well as monitoring and protection functions into a 16 Ld SOIC package. The PWM controller is intended to regulate the microprocessor memory core voltage with a synchronous-rectified buck converter. The linear controllers are intended to regulate the computer system’s AGP 1.5V bus power, the 2.5V clock power, and the 1.8V power for the North/South Bridge core voltage and/or cache memory circuits. Both the switching regulator and linear voltage references provide ?2 of static regulation over line, load, and temperature ranges. All outputs are user-adjustable by means of an external resistor divider. All linear controllers employ bipolar NPNs for the pass transistors.

Features

? Provides 4 Regulated Voltages

- Memory Core, AGP, Clock, and Memory Controller Hub Power

? ACPI Compatible

? Drives Bipolar Linear Pass Transistors

? Externally Resistor-Adjustable Outputs

? Simple Single-Loop Control Design

- Voltage-Mode PWM Control

? Fast PWM Converter Transient Response

- High-Bandwidth Error Amplifier

- Full 0 to 100 Duty Ratio

? Excellent Output Voltage Regulation

- All Outputs: ?2 Over Temperature

? Overcurrent Fault Monitors

- Switching Regulator Does Not Require Extra Current Sensing Element, Uses MOSFET’s rDS(ON)

? Small Converter Size

- 300kHz Constant Frequency Operation

- Small External Component Count

? Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

? Motherboard Power Regulation for Computers

HIP6521CB屬于集成電路（IC） > 線性穩(wěn)壓器控制器。瑞薩科技有限公司制造生產(chǎn)的HIP6521CB穩(wěn)壓器 - 線性 + 開關(guān)此產(chǎn)品族中的產(chǎn)品用于構(gòu)建執(zhí)行 DC-DC 轉(zhuǎn)換或電壓調(diào)節(jié)功能的電路，采用的是開關(guān)模式和線性穩(wěn)壓器功能的組合。雖然具體的拓撲各不相同，但此類產(chǎn)品的主要目的是將開關(guān)模式技術(shù)的效率優(yōu)勢與線性穩(wěn)壓技術(shù)的低噪聲特性結(jié)合在一起。