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

LX7180A

4A Step-Down Regulator

Status: In Production

Features:

  • 0-4 A Step-down Regulator
  • Operational Input Supply Voltage Range: 3.0 V - 5.5 V (short durations to 6.5 V)
  • Hysteretic Control Offers Best Transient Response
  • PWM Switching at a Constant 1.65 MHz
  • Power Save Mode (PSM) can be Selected to Improve Light Load Efficiency
  • 100% Duty Ratio Operation
  • Input Under Voltage and Over Voltage Protection
  • Enable and Power Good Function
  • I2C Serial Interface at 3.4 Mbps
  • Internal Soft-start
  • Cycle-by-Cycle Over Current Protection
  • Hiccup Mode Protects Against Short Circuit Faults
  • Seven Bit Adjustable Reference Voltage via I2C Bus
  • RoHS Compliant
View More
Overview
Documents
Development Environment
RoHS Information
Add to Cart

Device Overview

Summary

The LX7180A is a 4A step-down regulator with integrated MOSFETs packaged in a space saving QFN12 2 mm x 2 mm for today’s mobile devices. It uses an ultra-fast, constant frequency hysteretic control method to minimize external filter components while maintaining excellent regulation. The LX7180A reference voltage is programmable from 0.6 V to 1.195 V through a high speed (up to 3.4 MHz), bi-directional I2C bus. The LX7180 operates from 3 V to 5.5 V rails and outputs 0.6 V to 100% of the input voltage. Cycle-by-cycle current limiting protects against overcurrent conditions. Hiccup mode provides protection for heavy over-load or short-circuit faults. Thermal protection shuts down the regulator under overtemperature conditions. Over voltage conditions will immediately shut off the output to protect against permanent damage. The LX7180A automatically restarts when all fault conditions are cleared.

Additional Features
  • 0-4 A Step-down Regulator
  • Operational Input Supply Voltage Range: 3.0 V - 5.5 V (short durations to 6.5 V)
  • Hysteretic Control Offers Best Transient Response
  • PWM Switching at a Constant 1.65 MHz
  • Power Save Mode (PSM) can be Selected to Improve Light Load Efficiency
  • 100% Duty Ratio Operation
  • Input Under Voltage and Over Voltage Protection
  • Enable and Power Good Function
  • I2C Serial Interface at 3.4 Mbps
  • Internal Soft-start
  • Cycle-by-Cycle Over Current Protection
  • Hiccup Mode Protects Against Short Circuit Faults
  • Seven Bit Adjustable Reference Voltage via I2C Bus
  • 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
4
Switching Frequency (kHz)
1650
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
6.8

Documents

Jump to:

Data Sheets

  
575KB

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
LX7180A-01CLQ-TR
0.010400
0.000000
12
VQFN
2x2x1.0mm
Matte Tin
e3
LX7180A-11CLQ-TR
0.010400
0.000000
12
VQFN
2x2x1.0mm
Matte Tin
e3
LX7180A-21CLQ-TR
0.010400
0.000000
12
VQFN
2x2x1.0mm
Matte Tin
e3
LX7180A-31CLQ-TR
0.010400
0.000000
12
VQFN
2x2x1.0mm
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.

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