集成电路ISL6529CB-T

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.

The synchronous rectified buck converters incorporate 

simple, single feedback loop, voltage-mode control with fast 

transient response. Both the switching regulator and linear 

regulator provide a maximum static regulation tolerance of 

±2% over line, load, and temperature ranges. Each output is 

user-adjustable by means of external resistors.

An integrated soft-start feature brings both supplies into 

regulation in a controlLED manner. Each output is monitored 

via the FB pins for undervoltage events. If either output 

drops below 51.5% of the nominal output level, both 

converters are shut down.

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 Related Literature ? Technical Brief TB363 Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices

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