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LX7219-21ILQ

Description
Switching Regulator,
CategoryPower/power management    The power supply circuit   
File Size1MB,25 Pages
ManufacturerMicrosemi
Websitehttps://www.microsemi.com
Environmental Compliance
Download Datasheet Parametric View All

LX7219-21ILQ Overview

Switching Regulator,

LX7219-21ILQ Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
Objectid7217952829
package instructionVQFN-14
Reach Compliance Codecompliant
ECCN codeEAR99
Date Of Intro2018-07-30
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
control modeVOLTAGE-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage5.5 V
Minimum input voltage2.7 V
Nominal input voltage5 V
JESD-30 codeR-XQCC-N14
length3 mm
Number of functions1
Number of terminals13
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Maximum output current6 A
Maximum output voltage0.909 V
Minimum output voltage0.891 V
Nominal output voltage0.9 V
Package body materialUNSPECIFIED
encapsulated codeHVQCCN
Encapsulate equivalent codeLCC14,.08X.12,20
Package shapeRECTANGULAR
Package formCHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Maximum seat height0.9 mm
surface mountYES
Switch configurationBUCK
Maximum switching frequency1400 kHz
Temperature levelINDUSTRIAL
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationQUAD
width2 mm

LX7219-21ILQ Preview

LX7219
Datasheet
6A Hysteretic Synchronous Buck Regulator with I2C
Production
July 2018
6A Hysteretic Synchronous Buck Regulator with I2C Production
Contents
1 Revision History ............................................................................................................................. 1
1.1 Revision 2.0 ........................................................................................................................................ 1
1.2 Revisions Prior to 2.0 .......................................................................................................................... 1
2 LX7219 Overview ........................................................................................................................... 2
2.1 Features .............................................................................................................................................. 2
2.2 Applications ........................................................................................................................................ 2
3 Pin/Ball Configuration .................................................................................................................... 4
3.1 Ordering Information ......................................................................................................................... 4
3.2 Pin/Ball Description ............................................................................................................................ 5
3.3 Functional Block Diagram ................................................................................................................... 6
4 Electrical Specifications .................................................................................................................. 7
4.1 Absolute Maximum Ratings ................................................................................................................ 7
4.2 Electrical Characteristics ..................................................................................................................... 7
4.2.1
4.2.2
4.2.3
4.2.4
Operating Ratings .................................................................................................................................... 7
Typical Electrical Characteristics ............................................................................................................. 7
Thermal Properties .................................................................................................................................. 9
Application Specifications ....................................................................................................................... 9
4.3 I2C Timing Specifications .................................................................................................................. 10
5 Operation Theory ......................................................................................................................... 11
5.1 Basic Operation ................................................................................................................................ 11
5.2 Setting the Output Voltage ............................................................................................................... 11
5.3 Startup .............................................................................................................................................. 11
5.4 Over Current Protection ................................................................................................................... 11
5.5 Positive Voltage Transitions ............................................................................................................. 12
5.6 Negative Voltage Transitions ............................................................................................................ 13
5.7 Enabling Regulator from I2C Bus ...................................................................................................... 13
5.8 Switch Node Rise Rate Adjustment .................................................................................................. 13
6 I2C Interface ................................................................................................................................. 14
6.1 I2C Port Functional Description ........................................................................................................ 14
6.2 I2C Port Description .......................................................................................................................... 14
6.3 Register Map .................................................................................................................................... 14
6.4 Slave Address .................................................................................................................................... 14
6.5 Start and Stop Commands ................................................................................................................ 14
6.6 Data Transfers .................................................................................................................................. 14
6.6.1
Data Transfer Timing for Write Commands .......................................................................................... 15
6.7 I2C Electrical Characteristics ............................................................................................................. 15
Microsemi Proprietary and Confidential. LX7219 Datasheet Revision 2.0
6A Hysteretic Synchronous Buck Regulator with I2C Production
6.8 Control Register Bit Definitions ........................................................................................................ 18
7 Package Markings and Dimensions .............................................................................................. 20
8 Land Pattern Recommendation ................................................................................................... 21
Microsemi Proprietary and Confidential. LX7219 Datasheet Revision 2.0
6A Hysteretic Synchronous Buck Regulator with I2C Production
1
Revision History
The revision history describes the changes that were implemented in the document. The changes are
listed by revision, starting with the most current publication.
1.1
Revision 2.0
Revision 2.0 was published in July 2018. In this revision, the format of the document was updated to the
latest template.
1.2
Revisions Prior to 2.0
Prior to revision 2.0, this datasheet was maintained in a different document control system. The last
revision of this document prior to 2.0 was revision 1.3, published in March 2018.
Microsemi Proprietary and Confidential. LX7219 Datasheet Revision 2.0
1
6A Hysteretic Synchronous Buck Regulator with I2C Production
2
LX7219 Overview
The LX7219 is a digitally controlled step-down regulator IC with an integrated 22 mΩ high-side P-channel
MOSFET and a 13 mΩ low-side N-channel MOSFET. It features Microsemi's proprietary constant-
frequency hysteretic control engine for near-instantaneous correction to line/load transients for a
voltage range of 2.7 V to 5.5 V, and 6 A constant frequency . It does not require high-ESR output
capacitors and incorporates energy-saving power save or pulse skip mode (PSM) at light loads, to extend
battery life in mobile applications. The LX7219 has an I
2
C serial interface port for output voltage
margining and monitoring, if required (it can also operate in default mode). In addition it includes robust
fault monitoring functions. The LX7219 is available in 0.9 V single slave address and 0.8 V default output
voltage (no voltage divider is necessary) with four slave addresses. The output voltage can be adjusted
with an external voltage divider up to 3.3 V.
2.1
Features
The following features are supported in LX7219.
Constant frequency hysteretic control
Extremely fast line/load transient response
I
2
C for output adjustment (3.4 Mbps)
1.2 MHz switching frequency
Extremely low-R
DSON
MOSFETS
Input voltage rail 2.7 V to 5.5 V
Greater than 6 A output current
Power save mode for light-load efficiency
UVLO, OVP, and OCP
–40 °C to 85 °C ambient temperature
Available in VQFN 2mm x 3mm 14L package
RoHS compliant
2.2
Applications
The following list of applications use LX7219.
High performance hard disk drive (HDD)
Solid-state drive
Data center applications
Raid/host bus adaptors
Optical transceivers
The following figure shows the block diagram of LX7219.
Microsemi Proprietary and Confidential. LX7219 Datasheet Revision 2.0
2
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