ISL8118IRZ Intersil, ISL8118IRZ Datasheet

IC CTRLR PWM 1-PHASE 28-QFN

ISL8118IRZ

Manufacturer Part Number
ISL8118IRZ
Description
IC CTRLR PWM 1-PHASE 28-QFN
Manufacturer
Intersil
Datasheet

Specifications of ISL8118IRZ

Pwm Type
Voltage Mode
Number Of Outputs
1
Frequency - Max
2MHz
Duty Cycle
100%
Voltage - Supply
2.97 V ~ 22 V
Buck
Yes
Boost
No
Flyback
No
Inverting
No
Doubler
No
Divider
No
Cuk
No
Isolated
No
Operating Temperature
-40°C ~ 85°C
Package / Case
28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
Frequency-max
2MHz
Rohs Compliant
YES
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ISL8118IRZ
Manufacturer:
Intersil
Quantity:
120
Part Number:
ISL8118IRZ
Manufacturer:
INTERSIL
Quantity:
20 000
3.3V to 20V, Single-Phase PWM Controller
with Integrated 2A/4A MOSFET Drivers
The ISL8118 is a single-phase PWM controller featuring an
input voltage range of +3.3V to +20V and integrated MOSFET
drivers. Utilizing voltage-mode operation with input voltage
feed-forward compensation, the ISL8118 maintains a constant
loop gain, providing optimal transient response for applications
with a wide input operating voltage range.
The output voltage can be precisely regulated down to 0.591V
with a system tolerance of ±1.0% over the induct rail
temperature range and line and load variations. A external
reference input is provided to bypass the internal reference for
voltage tracking or DDR memory applications. The compact
28 Ld 5x5 QFN package, integrated linear regulator as well as
the external linear regulator drive option, integrated differential
remote sense amplifier and integrated voltage margining with
adjustable upper and lower settings decrease external
component count and reduce board space requirements.
Programmable soft-start with pre-biased load capability,
adjustable operating frequency from 250kHz to 2MHz,
sourcing and sinking overcurrent protection, overvoltage and
undervoltage protection, and power-good indication with
programmable delay combine to make the ISL8118 a superior
choice for many power supply systems.
Pinout
VSENSN
REFOUT
VSENSP
REFIN
OFSN
OFSP
SS
1
2
3
4
5
6
7
28
8
27
9
(28 LD 5x5 QFN)
10
26
TOP VIEW
ISL8118
SIDE PAD
BOTTOM
®
GND
11
25
1
12
24
Data Sheet
13
23
14
22
21
20
19
18
17
16
15
BOOT
TGATE
LX
PGND
BGATE
PVCC
EXDRV
1-888-INTERSIL or 1-888-468-3774
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• Wide Input Voltage Range: +3.3V to +20V
• High-Speed 2A/4A MOSFET Gate Drivers that Operate
• 0.591V Internal Reference
• External Reference Input
• Input Voltage Feed-forward Compensation
• Internal Linear Regulator
• External Linear Regulator Drive Available
• High System Accuracy:
• Programmable Operating Frequency from 250kHz to 2MHz
• Programmable Soft-Start with Pre-biased Load Capability
• Integrated Unity-Gain Differential Remote Sense Amplifier
• Enable Input with Voltage Monitoring Capability
• Integrated Voltage Margining with Independent Upper and
• Overvoltage and Undervoltage Protection
• Low-Side and High-Side MOSFET Current Sensing
• Overcurrent Protection for Sourcing and Sinking Currents
• Power-Good Indicator with Programmable Delay
• Compact 28 Ld 5x5 QFN Package
• Pb-Free (RoHS Compliant)
Applications
• Telecom and Datacom Servers
• Point of Load Modules
• Routers and Switchers
• High Current Distributed Power Supplies
Ordering Information
ISL8118CRZ* ISL8118CRZ
ISL8118IRZ* ISL8118IRZ
*Add “-T” suffix for tape and reel. 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.
from 2.9V to 5.6V
- ±0.68% Over the Range of 0°C to +70°C
- ±1.00% Over the Range of -40°C to +85°C
Lower Settings
NUMBER
(Note)
PART
All other trademarks mentioned are the property of their respective owners.
April 7, 2009
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
PARTMARKI
Copyright Intersil Americas Inc. 2006, 2009. All Rights Reserved
NG
RANGE (°C)
-40 to +85 28 Ld 5x5 QFN L28.5x5
0 to +70
TEMP.
28 Ld 5x5 QFN L28.5x5
PACKAGE
(Pb-Free)
ISL8118
FN6325.1
DWG. #
PKG.

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ISL8118IRZ Summary of contents

Page 1

... PGND NUMBER (Note) 17 BGATE ISL8118CRZ* ISL8118CRZ PVCC 16 ISL8118IRZ* ISL8118IRZ EXDRV 15 *Add “-T” suffix for tape and reel. Please refer to TB347 for details on reel specifications. 14 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) ...

Page 2

Block Diagram REFIN REFOUT MARGIN OFSP VOLTAGE MARGINING OFSN OTA SS FB COMP VCC 800mV PGOOD COMP VSENSP VSENSN UNITY GAIN DIFF AMP VDIFF PGDLY PGOOD EN VCC POWER-ON REFERENCE RESET (POR 0.591V REF SOFT-START ...

Page 3

Typical Application I (Internal Linear Regulator with Remote Sense) +3.3V to +20V C F1 VIN INTERNAL 5.6V BIAS LINEAR REGULATOR VFF C F3 VCC EN REFIN REFOUT PGOOD C PGDLY PGDLY R FSET FSET MARGIN R OFSP OFSP R MARG ...

Page 4

Typical Application II (External Linear Regulator without Remote Sense) +3.3V to +20V DRV EXDRV VIN C F3 VFF REFOUT VCC REFIN EN PGOOD C PGDLY PGDLY R FSET FSET MARGIN R OFSP OFSP R MARG ...

Page 5

Typical Application III (Dual Data Rate I or II) VDDQ 1.8V or 2.5V 5V VIN R EN1 VFF EN2 F4 1K REFIN REFOUT 15nF DIMM 1K PGOOD C PGDLY PGDLY R FSET FSET MARGIN R OFSP OFSP ...

Page 6

... Thermal Information Thermal Resistance (Notes 1, 2) QFN Package . . . . . . . . . . . . . . . . . . Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . +150°C Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150° 0.3V Pb-Free Reflow Profile .see link below BOOT http://www.intersil.com/pbfree/Pb-FreeReflow.asp - .<6V LX TEST CONDITIONS I VIN = VCC = PVCC = 5V 600kHz, VIN TGATE and BGATE Open ...

Page 7

Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are not production tested. (Continued) PARAMETER SYMBOL VCC Hysteresis POR Rising PVCC ...

Page 8

Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are not production tested. (Continued) PARAMETER SYMBOL TGATE Source Saturation Current I ...

Page 9

Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are not production tested. (Continued) PARAMETER SYMBOL Margining Transfer Ratio N Positive ...

Page 10

A 10µA current source to GND is active while the part is disabled, and is inactive when the part is enabled. This provides functionality for programmable hysteresis when the EN pin is used for voltage monitoring. VFF (Pin ...

Page 11

OV/UV/PGOOD comparators. The VDIFF pin should be connected to the FB pin by a standard feedback network. In the event that the remote sense buffer is disabled, the VDIFF pin should be connected to VOUT by a resistor divider along ...

Page 12

VDIFF GOOD OV UV FIGURE 3. UNDERVOLTAGE-OVERVOLTAGE WINDOW 1.5V ⋅ -------------- - = PGDLY PGDLY 30μA Undervoltage and Overvoltage Protection The Undervoltage (UV) and Overvoltage (OV) protection circuitry compares the voltage on the VDIFF pin with the reference ...

Page 13

... High Speed MOSFET Gate Driver The integrated driver has similar drive capability and features to Intersil's ISL6605 stand alone gate driver. The PWM tri-state feature helps prevent a negative transient on the output voltage when the output is being shut down. This ...

Page 14

A 1Ω to 2Ω resistor is recommended series with the bootstrap diode when using VCCs above 5.0V to prevent the bootstrap capacitor from overcharging due to the negative swing of the trailing edge of the LX node. ...

Page 15

VOUT (LOCAL) GND (LOCAL) VCC 800mV FIGURE 6. SIMPLIFIED UNITY GAIN DIFFERENITAL SENSING IMPLEMENTATION As the VDIFF pin is connected internally to the OV/UV/PGOOD comparator, an external resistor divider must then be connected to VDIFF to provide correct voltage information ...

Page 16

Figure 8 shows the circuit traces that require additional layout consideration. Use single point and ground plane construction for the circuits shown. Minimize any leakage current paths on the SS pin and locate the capacitor, CSS close to the SS ...

Page 17

A small capacitor Figure 10, can be added to SEN filter out noise, typically C is chosen so the SEN corresponding time constant does not reduce the overall phase margin of the design, typically this ...

Page 18

Component Selection Guidelines Output Capacitor Selection An output capacitor is required to filter the output and supply the load transient current. The filtering requirements are a function of the switching frequency and the ripple current. The load transient requirements are ...

Page 19

... 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 ...

Page 20

Package Outline Drawing L28.5x5 28 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 2, 10/07 5.00 6 PIN 1 INDEX AREA (4X) 0.15 TOP VIEW ( 4. 65 TYP ) ( 3. 10) TYPICAL RECOMMENDED LAND PATTERN 20 ISL8118 A B ...

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