ISL6208ACRZ Intersil, ISL6208ACRZ Datasheet

ISL6208ACRZ

Manufacturer Part Number

ISL6208ACRZ

Description

IC MOSFET DRVR SYNC BUCK 8-QFN

Manufacturer

Intersil

Datasheet

1.ISL6208ACBZ.pdf (10 pages)

Specifications of ISL6208ACRZ

Configuration

High and Low Side, Synchronous

Input Type

PWM

Delay Time

26ns

Current - Peak

Number Of Configurations

Number Of Outputs

High Side Voltage - Max (bootstrap)

33V

Voltage - Supply

4.5 V ~ 5.5 V

Operating Temperature

-10°C ~ 100°C

Mounting Type

Surface Mount

Package / Case

8-VQFN

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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High Voltage Synchronous Rectified Buck

MOSFET Driver

The ISL6208A is a high frequency, dual MOSFET driver,

optimized to drive two N-Channel power MOSFETs in a

synchronous-rectified buck converter topology. It is

especially suited for mobile computing applications that

require high efficiency and excellent thermal performance.

This driver, combined with an Intersil multiphase Buck PWM

controller, forms a complete single-stage core-voltage

regulator solution for advanced mobile microprocessors.

The ISL6208A 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 ISL6208A 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 ISL6208A. Each driver is capable of driving a 3000pF

load with propagation delays of 15ns 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 ISL6208A 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. Programmable dead-time

control with gate threshold monitoring is also integrated to

prevent both MOSFETs from conducting simultaneously.

Related Literature

• Technical Brief TB363 “Guidelines for Handling and

• Technical Brief TB389 “PCB Land Pattern Design and

• Technical Brief TB447 “Guidelines for Preventing Boot-to-

Processing Moisture Sensitive Surface Mount Devices

(SMDs)”

Surface Mount Guidelines for MLFP Packages”

Phase Stress on Half-Bridge MOSFET Driver ICs”

Data Sheet

1-888-INTERSIL or 1-888-468-3774

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

Features

• Dual MOSFET Drives for Synchronous Rectified Bridge

• Adaptive Shoot-Through Protection

• 0.5Ω On-Resistance and 4A Sink Current Capability

• Supports High Switching Frequency up to 2MHz

• Three-State PWM Input for Power Stage Shutdown

• Internal Bootstrap Schottky Diode

• Low Bias Supply Current (5V, 100µA)

• Diode Emulation for Efficiency and Pre-Biased Startup

• VCC POR (Power-On-Reset) Feature Integrated

• Pin-to-pin Compatible with ISL6207, ISL6208, ISL6209

• QFN Package:

• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• 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

Ordering Information

NOTE: Intersil Pb-free plus anneal products employ special Pb-free

material sets; molding compounds/die attach materials and 100%

matte tin plate termination finish, which are RoHS compliant and

compatible with both SnPb and Pb-free soldering operations. Intersil

Pb-free products are MSL classified at Pb-free peak reflow

temperatures that meet or exceed the Pb-free requirements of

IPC/JEDEC J STD-020.

ISL6208ACBZ

(Note)

ISL6208ACBZ-T

(Note)

ISL6208ACRZ

(Note)

ISL6208ACRZ-T

(Note)

PART NUMBER

- Active Gate Threshold Monitoring

- Programmable Dead-Time

- Fast Output Rise and Fall Time

- Low Propagation Delay

- Compliant to JEDEC PUB95 MO-220

- Near Chip Scale Package footprint, which improves

February 15, 2006

QFN - Quad Flat No Leads - Package Outline

PCB efficiency and has a thinner profile

All other trademarks mentioned are the property of their respective owners.

Intersil (and design) is a registered trademark of Intersil Americas Inc.

ISL6208ACBZ -10 to 100 8 Ld SOIC

ISL6208ACBZ 8 Ld SOIC Tape and Reel

08AZ

MARKING

PART

(Pb-Free)

8 Ld 3x3 QFN Tape and Reel

(Pb-Free)

-10 to 100 8 Ld 3x3 QFN

RANGE

TEMP.

(°C)

ISL6208A

(Pb-Free)

PACKAGE

FN9272.0

M8.15

L8.3x3

DWG.

PKG.

Related parts for ISL6208ACRZ

ISL6208ACRZ Summary of contents

Page 1

... ISL6208ACBZ-T ISL6208ACBZ 8 Ld SOIC Tape and Reel (Note) ISL6208ACRZ 08AZ (Note) ISL6208ACRZ-T 08AZ (Note) NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations ...

Page 2

Pinouts ISL6208ACB (8 LD SOIC) TOP VIEW UGATE 1 BOOT 2 PWM 3 GND 4 Block Diagram VCC FCCM PWM Timing Diagram t PWM PDHU t PDLU t RU UGATE LGATE PDLL 2 ISL6208A 8 PHASE ...

Page 3

Absolute Maximum Ratings Supply Voltage (VCC -0. Input Voltage ( ...

Page 4

Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted (Continued) PARAMETER LGATE Fall Time (Note 5) UGATE Turn-Off Propagation Delay LGATE Turn-Off Propagation Delay UGATE Turn-On Propagation Delay LGATE Turn-On Propagation Delay UGATE Turn-On Propagation Delay LGATE Turn-On Propagation Delay Minimum ...

Page 5

Functional Pin Description UGATE (Pin 1 for SOIC-8, Pin 8 for QFN) The UGATE pin is the upper gate drive output. Connect to the gate of high-side power N-Channel MOSFET. BOOT (Pin 2 for SOIC-8, Pin 1 for QFN) BOOT ...

Page 6

Typical Performance Waveforms FIGURE 2. LOAD TRANSIENT (0 - 30A, 3-PHASE) FIGURE 4. DCM TO CCM TRANSITION AT NO LOAD FIGURE 6. PRE-BIASED STARTUP IN CCM MODE 6 ISL6208A FIGURE 3. LOAD TRANSIENT (30 - 0A, 3-PHASE) FIGURE 5. CCM ...

Page 7

... The turn-OFF of the low side MOSFET can cause gross current measurement inaccuracies. Three-State PWM Input A unique feature of the ISL6208A and other Intersil drivers is the addition of a shutdown window to the PWM input. If the PWM signal enters and remains within the shutdown window for a set holdoff time, the output drivers are disabled and both MOSFET gates are pulled and held low ...

Page 8

The equation can be rewritten to solve for R follows – 5ns ( ) DELAY kΩ = ------------------------------------------------------ DELAY 0.045 Internal Bootstrap Diode This driver features an internal bootstrap Schottky diode. Simply adding ...

Page 9

... Dimensions D2 and E2 are for the exposed pads which provide improved electrical and thermal performance. 8. Nominal dimensions are provided to assist with PCB Land Pattern Design efforts, see Intersil Technical Brief TB389. 9. Features and dimensions A2, A3, D1, E1, P & θ are present when Anvil singulation method is used and not present for saw singulation ...

Page 10

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use ...

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