Microchip logo
  • All
  • Products
  • Documents
  • Applications Notes
product primary image

LX7178

Synchronous Buck Regulator with I2C

Status: In Production

Features:

  • Constant Frequency Hysteretic Control
  • Extremely Fast Line/Load Transient Response
  • I 2 C for Output Adjustment (3.4Mbps)
  • 1.875 MHz Switching Frequency
  • Extremely Low-RDSON MOSFETS
  • Input Voltage Rail 3.3V to 5V
  • Greater than 5A Output Current
  • I 2 C Selectable Power Save Mode for Light-Load Efficiency
  • UVLO, OVP, OCP
  • 0°C to +85°C Ambient Temperature
  • Available in WLCSP-20 (0.4mm pitch)
  • RoHS Compliant
View More
Overview
Documents
Development Environment
RoHS Information
Add to Cart

Device Overview

Summary

The LX7178 is a digitally controlled step-down regulator IC with an integrated 40mΩ high-side P-channel MOSFET and a 14mΩ 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 LX7178 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 LX7178 will operate from 3V to 5.5V, and is available in 0.8V fixed output voltage option (no voltage divider is necessary). The output voltage can also be adjusted with an external voltage divider up to 3.3V.

Additional Features
  • Constant Frequency Hysteretic Control
  • Extremely Fast Line/Load Transient Response
  • I 2 C for Output Adjustment (3.4Mbps)
  • 1.875 MHz Switching Frequency
  • Extremely Low-RDSON MOSFETS
  • Input Voltage Rail 3.3V to 5V
  • Greater than 5A Output Current
  • I 2 C Selectable Power Save Mode for Light-Load Efficiency
  • UVLO, OVP, OCP
  • 0°C to +85°C Ambient Temperature
  • Available in WLCSP-20 (0.4mm pitch)
  • RoHS Compliant
Parametrics
Name
Value
# of Outputs
1
Input Voltage Range Min (V)
3.0-5.5
Input Voltage Range Max (V)
7
Output Voltage Range Min (V)
0.6
Output Voltage Range Max (V)
3.3
Output Current (mA) max
5
Switching Frequency (kHz)
1875
Synchronous Rectifier
Yes
Operating Temp Range
0 to 85
Vfb (V)
0.6
Duty Cycle Max (%)
100
Light Load Efficiency Mode
Pulse Skip
Switch current (A) typ
7.5

Documents

Jump to:

Data Sheets

  
1563KB

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
LX7178-01CSP-TR
0.005890
0.000000
20
WLCSP
1.63x2.045x0.226mm
SAC405
e1
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.

Buy from Microchip

Grid
View
Table
View
Filter:
Apply
Clear
Only show products with samples
Product
Leads
Package Type
Temp Range
Packing Media
5K Pricing
Buy