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LX7220

Synchronous Buck Regulator with I2C

Status: In Production

Features:

  • Constant Frequency Hysteretic Control
  • Extremely Fast Line/Load Transient Response
  • I2C for Output Adjustment (3.4Mbps)
  • 1.2 MHz Switching Frequency
  • Extremely Low-RDSON MOSFETS
  • Input Voltage Rail 2.7V to 5.5V
  • Greater than 6A Output Current
  • Default Power Save Mode for Light-Load Efficiency
  • UVLO, OVP, OCP
  • -40°C to +85°C Ambient Temperature
  • Available in VQFN 2mm x 3mm 14L Package
  • RoHS Compliant
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

The LX7220 is a digitally controlled step-down regulator IC with an integrated 22mΩ high-side P-channel MOSFET and a 13mΩ low-side N-channel MOSFET. It features Microsemi’s proprietary constant-frequency hysteretic control engine for near-instantaneous correction to line/load transients. It does not require high-ESR output capacitors and incorporates energysaving “PSM” (Power Save or Pulse Skip Mode) at light loads, to extend battery life in mobile applications. The LX7220 has an I 2C 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 LX7220 will operate from 2.7V to 5.5V, and is available in 0.95V or 0.9V output voltages (no voltage divider is necessary). The output voltage can also be adjusted with an input voltage of 5V and external voltage divider up to 3.3V.

Additional Features
  • Constant Frequency Hysteretic Control
  • Extremely Fast Line/Load Transient Response
  • I2C for Output Adjustment (3.4Mbps)
  • 1.2 MHz Switching Frequency
  • Extremely Low-RDSON MOSFETS
  • Input Voltage Rail 2.7V to 5.5V
  • Greater than 6A Output Current
  • Default Power Save Mode for Light-Load Efficiency
  • UVLO, OVP, OCP
  • -40°C to +85°C Ambient Temperature
  • Available in VQFN 2mm x 3mm 14L Package
  • RoHS Compliant
Parametrics
Name
Value
# of Outputs
1
Input Voltage Range Min (V)
2.7-5.5
Input Voltage Range Max (V)
7
Output Voltage Range Min (V)
0.6
Output Voltage Range Max (V)
3.3
Output Current (mA) max
6
Switching Frequency (kHz)
1200
Synchronous Rectifier
Yes
Operating Temp Range
-40 to 85
Vfb (V)
0.6
Duty Cycle Max (%)
100
Light Load Efficiency Mode
Pulse Skip
Switch current (A) typ
8.5

Documents

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Data Sheets

  
1373KB

Development tools data is currently unavailable.

RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Dimension
Solder Composition
JEDEC Indicator
RoHS
China EFUP
LX7220-03ILQ-TR
0.000000
0.000000
14
VQFN
2x3x1.0mm
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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