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IC / 208Z / ISL6208CRZ / QFN-3X3

تولید کننده: Intersil
مدل کالا: ISL6208CRZ
موجودی:
تماس 8893- 6186
قیمت: 0تومان

ISL6208CRZ – 6208 – QFN -3*3 - INTERSIL

High Voltage Synchronous Rectified Buck MOSFET Drivers

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General Description

 

The ISL6208 and ISL6208B are high frequency, dual MOSFET drivers, optimized to drive two N-Channel power MOSFETs in a synchronous-rectified buck converter topology. They are especially suited for mobile computing applications that require high efficiency and excellent thermal performance

These drivers, combined with an Intersil multiphase Buck PWM controller, form a complete single-stage core-voltage regulator solution for advanced mobile microprocessors.ISL6208 and ISL6208B have the same function but different packages. The descriptions in this datasheet are based on ISL6208 and also apply to ISL6208B .The ISL6208 features 4A typical sinking current for the lower gate driver. This current is capable of holding the lower MOSFET gate off during the rising edge of the Phase node. This prevents shoot-through power loss caused by the high dv/dt of phase voltages. The operating voltage matches the 30V breakdown voltage of the MOSFETs commonly used in mobile computer power supplies

 

The ISL6208 also features a three-state PWM input that,working together with Intersil’s multiphase PWM controllers will prevent negative voltage output during CPU shutdown. This feature eliminates a protective Schottky diode usually seen in a microprocessor power systems

MOSFET gates can be efficiently switched up to 2MHz using the ISL6208. Each driver is capable of driving a 3000pF load with propagation delays of 8ns and transition times under 10ns. Bootstrapping is implemented with an internal Schottky diode. This reduces system cost and complexity, while allowing the use of higher performance MOSFETs. Adaptive shoot-through protection is integrated to prevent both MOSFETs from conducting simultaneously

A diode emulation feature is integrated in the ISL6208 to enhance converter efficiency at light load conditions. This feature also allows for monotonic start-up into pre-biased outputs. When diode emulation is enabled, the driver will allow discontinuous conduction mode by detecting when the inductor current reaches zero and subsequently turning off the low side MOSFET gate

 

Features

 

Dual MOSFET drives for synchronous rectified bridge

Adaptive shoot-through protection

0.5 On-resistance and 4A sink current capability

 Supports high switching frequency up to 2MHz

Fast output rise and fall time

Low propagation delay

Three-state PWM input for power stage shutdown

Internal bootstrap schottky diode

Low bias supply current /5V, 80μA

Diode emulation for enhanced light load efficiency and prebiased

start-up applications

VCC POR (power-on-reset) feature integrated

Low three-state shutdown holdoff time /typical 160ns

 Pin-to-pin compatible with ISL6207

QFN and DFN package

Compliant to JEDEC PUB95 MO-220

QFN - Quad flat no leads - package outline

DFN - Dual flat no leads - package outline

Near chip scale package footprint, which improves PCB

efficiency and has a thinner profile

Pb-free /RoHS compliant

 

 

Applications

 

 Core voltage supplies for Intel® and AMD® mobile

microprocessors

 High frequency low profile DC/DC converters

 High current low output voltage DC/DC converters

 High input voltage DC/DC converters

 

Related Literature

 

 Technical Brief TB363 “Guidelines for Handling and

Processing Moisture Sensitive Surface Mount Devices

(SMDs)”

 Technical Brief TB389 “PCB Land Pattern Design and

Surface Mount Guidelines for MLFP Packages”

Technical Brief TB447 “Guidelines for Preventing

Boot-to-Phase Stress on Half-Bridge MOSFET Driver ICs

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