isl6594d Intersil Corporation, isl6594d Datasheet

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isl6594d

Manufacturer Part Number
isl6594d
Description
Advanced Synchronous Buck Mosfet Driver With 3v Pwm Interface And Advanced Protection Features
Manufacturer
Intersil Corporation
Datasheet

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Advanced Synchronous Rectified Buck
MOSFET Drivers with Protection Features
The ISL6594D is high frequency MOSFET driver specifically
designed to drive upper and lower power N-Channel
MOSFETs in a synchronous rectified buck converter
topology. This driver combined with the ISL6594D Digital
Multi-Phase Buck PWM controller and N-Channel MOSFETs
forms a complete core-voltage regulator solution for
advanced microprocessors.
The ISL6594D drives both upper and lower gates over a range
of 4.5V to 13.2V. This drive-voltage provides the flexibility
necessary to optimize applications involving trade-offs between
gate charge and conduction losses.
An advanced adaptive zero shoot-through protection is
integrated to prevent both the upper and lower MOSFETs
from conducting simultaneously and to minimize the dead
time. The ISL6594D includes an overvoltage protection
feature operational before VCC exceeds its turn-on
threshold, at which the PHASE node is connected to the
gate of the low side MOSFET (LGATE). The output voltage
of the converter is then limited by the threshold of the low
side MOSFET, which provides some protection to the
microprocessor if the upper MOSFET(s) is shorted.
The ISL6594D also features an input that recognizes a
high-impedance state, working together with Intersil multi-
phase PWM controllers to prevent negative transients on the
controlled output voltage when operation is suspended. This
feature eliminates the need for the Schottky diode that may
be utilized in a power system to protect the load from
negative output voltage damage.
Ordering Information
ISL6594DCBZ
ISL6594DCBZ-T* 6594 DCBZ
ISL6594DCRZ
ISL6594DCRZ-T* 94DZ
*Please refer to TB347 for details on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets; molding compounds/die attach
materials and 100% matte tin plate PLUS ANNEAL - e3 termination
finish, which is 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.
PART NUMBER
(Note)
6594 DCBZ
94DZ
MARKING
PART
®
RANGE (°C)
1
0 to +85
0 to +85
0 to +85
0 to +85
TEMP.
Data Sheet
8 Ld SOIC
10 Ld 3x3 DFN
8 Ld SOIC
Tape and Reel
10 Ld 3x3 DFN L10.3x3
Tape and Reel
PACKAGE
(Pb-free)
1-888-INTERSIL or 1-888-468-3774
M8.15
M8.15
L10.3x3
DWG. #
PKG.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• Dual MOSFET Drives for Synchronous Rectified Bridge
• Pin-to-pin Compatible with ISL6596
• Advanced Adaptive Zero Shoot-Through Protection
• Adjustable Gate Voltage for Optimal Efficiency
• 36V Internal Bootstrap Schottky Diode
• Bootstrap Capacitor Overcharging Prevention
• Supports High Switching Frequency (up to 2MHz)
• Optimized for 3.3V PWM Input
• Three-State PWM Input for Output Stage Shutdown
• Three-State PWM Input Hysteresis for Applications With
• Pre-POR Overvoltage Protection
• VCC Undervoltage Protection
• Expandable Bottom Copper Pad for Enhanced Heat
• Dual Flat No-Lead (DFN) Package
• Pb-Free (RoHS Compliant)
Applications
• Optimized for POL DC/DC Converters for IBA Systems
• Core Regulators for Intel® and AMD® Microprocessors
• High Current DC/DC Converters
• High Frequency and High Efficiency VRM and VRD
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 QFN (MLFP) Packages”
- Body Diode Detection
- Auto-zero of r
- 3A Sinking Current Capability
- Fast Rise/Fall Times and Low Propagation Delays
Power Sequencing Requirement
Sinking
- Near Chip-Scale Package Footprint; Improves PCB
December 3, 2007
Efficiency and Thinner in Profile
All other trademarks mentioned are the property of their respective owners.
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2006, 2007. All Rights Reserved
DS(ON)
Conduction Offset Effect
ISL6594D
FN9282.1

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isl6594d Summary of contents

Page 1

... Multi-Phase Buck PWM controller and N-Channel MOSFETs forms a complete core-voltage regulator solution for advanced microprocessors. The ISL6594D drives both upper and lower gates over a range of 4.5V to 13.2V. This drive-voltage provides the flexibility necessary to optimize applications involving trade-offs between gate charge and conduction losses. ...

Page 2

... THE PACKAGE MUST BE SOLDERED TO THE CIRCUIT’S GROUND. ISL6594DCR (10 LD 3x3 DFN) TOP VIEW 1 10 UGATE PHASE BOOT 2 9 PVCC GND 3 8 N/C N/C PWM 4 7 VCC GND 5 6 LGATE BOOT UGATE PHASE (LVCC) PVCC UVCC = PVCC FOR ISL6594D LGATE GND December 3, 2007 FN9282.1 ...

Page 3

... Typical Application - 4 Channel Converter Using ISL6592 and ISL6594D Gate Drivers +12V +5V +3.3V VDD V12_SEN GND ISL6592 OUT1 VID4 OUT2 VID3 ISEN1 VID2 OUT3 OUT4 VID1 ISEN2 FROM µP VID0 OUT5 VID5 OUT6 LL0 ISEN3 LL1 OUTEN OUT7 OUT8 TO µP VCC_PWRGD ISEN4 OUT9 ...

Page 4

... Maximum Operating Junction Temperature +125°C Supply Voltage, V Supply Voltage Range, PVCC . . . . . . . . . . . . . . . . 5V to 12V ±10% SYMBOL TEST CONDITIONS I ISL6594D 300kHz, V VCC PWM I ISL6594D 1MHz, V VCC PWM I ISL6594D 300kHz, V PVCC PWM I ISL6594D 1MHz, V PVCC PWM 3.3V PWM PWM PWM V = 12V 12V 12V CC ...

Page 5

... Connect this pin to the SOURCE of the upper MOSFET and the DRAIN of the lower MOSFET. This pin provides a return path for the upper gate drive PAD Connect this pad to the power ground plane (GND) via thermally enhanced connection. 5 ISL6594D SYMBOL TEST CONDITIONS 12V, 3nF Load, Adaptive PDHL ...

Page 6

... FL t PDLL Operation Designed for versatility and speed, the ISL6594D MOSFET driver controls both high-side and low-side N-Channel FETs of a half-bridge power train from one externally provided PWM signal. Prior to VCC exceeding its POR level, the Pre-POR overvoltage protection function is activated during initial start-up ...

Page 7

... FIGURE 2. BOOTSTRAP CAPACITANCE vs BOOT RIPPLE VOLTAGE Gate Drive Voltage Versatility The ISL6594D provides the user flexibility in choosing the gate drive voltage for efficiency optimization. The ISL6594D ties the upper and lower drive rails together. Simply applying a voltage from +4. 13.2V on PVCC sets both gate drive rail voltages simultaneously, while VCC’ ...

Page 8

... HI2 EXT2 LO2 R GI1 ------------- EXT1 G1 EXT2 ISL6594D PVCC (EQ FIGURE 3. TYPICAL UPPER-GATE DRIVE TURN-ON PATH Q2 • ⎞ Q2 • ⎟ ⎠ (EQ defined at a and the GS2 is the driver’s total Q1 FIGURE 4. TYPICAL LOWER-GATE DRIVE TURN-ON PATH ...

Page 9

... V = ------- – ⎜ GS_MILLER rss dt ⎜ ⎝ rss GD UGPH GI 9 ISL6594D PVCC FIGURE 5. GATE TO SOURCE RESISTOR TO REDUCE DS ⎞ ⎟ ⋅ ⎟ iss ⎟ (EQ. 5) ⎟ ⎠ iss GD GS VIN BOOT C BOOT UGATE ...

Page 10

... D2 (DATUM B) D2 INDEX AREA (DATUM N (Nd-1)Xe REF. BOTTOM VIEW 0.415 NX (b) (A1) 5 SECTION "C-C" 10 ISL6594D L10.3x3 2X 0. LEAD DUAL FLAT NO-LEAD PLASTIC PACKAGE 2X 0. SYMBOL 0. 0. NOTES: 1. Dimensioning and tolerancing conform to ASME Y14.5-1994. ...

Page 11

... 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. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 11 ISL6594D M8.15 (JEDEC MS-012-AA ISSUE C) 8 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE ...

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