IC-Hersteller Microchip

IC-Hersteller (95)

Microchip LX7180A | Demoboard LX7180A

LX7180A 4 Amp Step Down Converter

Details

TopologieAbwärtswandler
Eingangsspannung3-5.5 V
Ausgang 15.5 V / 4 A
IC-Revision0.1

Beschreibung

The LX7180A is a 4A step-down regulator with integrated MOSFETs packaged in a space saving QFN12 2mm x 2mm 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 0.6V to 1.195V through a high speed (up to 3.4MHz), bi-directional I2C bus.The LX7180A operates from 3V to 5.5V rails and outputs 0.6V to 100% of the input voltage.Cycle-by-cycle current limiting protects against over-current conditions. Hiccup mode provides protection for heavy over-load or short-circuit faults. Thermal protection shuts down the regulator under over-temperature 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.

Eigenschaften

  • 0-4A Step-down Regulator
  • Operational Input Supply Voltage Range: 3.0V-5.5V (short durations to 6.5V)
  • Hysteretic Control Offers Best Transient Response
  • PWM Switching at a Constant 1.65MHz
  • 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 3.4Mbps
  • 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

Typische Anwendungen

  • High Performance HDD/LCD TV/Server and Workstations
  • PoE Powered Devices Smart Phone
  • Notebook/Netbook

Artikeldaten

Artikel Nr. Daten­blatt Simu­lation Downloads ProduktserieCTol. CVR
(V (DC))
BauformBetriebstemperaturDF
(%)
RISOKeramiktypL
(mm)
W
(mm)
H
(mm)
Fl
(mm)
VerpackungL
(µH)
IRP,40K
(A)
ISAT1
(A)
ISAT,30%
(A)
RDC max.
(mΩ)
fres
(MHz)
MontageartEndurance
(h)
BetriebstemperaturIRIPPLE
(mA)
RESR
(mΩ)
ILeak
(µA)
Raster
(mm)
Ø D
(mm)
Muster
885012207026SPEC
8 Dateien WCAP-CSGP MLCCs 10 V(DC)10 µF ±10% 10 0805 -55 °C up to +125 °C 100.01 GΩ X7R Klasse II 2 1.25 1.25 0.5 7" Tape & Reel
885012107005SPEC
8 Dateien WCAP-CSGP MLCCs 6.3 V(DC)22 µF ±20% 6.3 0805 -55 °C up to +85 °C 100.005 GΩ X5R Klasse II 2 1.25 1.25 0.5 7" Tape & Reel
870055674005SPEC
7 Dateien WCAP-PTHR Aluminium-Polymer-Kondensatoren47 µF ±20% 35 12 11.5 Ammopack Radial THT 2000 -55 °C bis zu +105 °C 2890 25 329 3.5 8
744373360047SPEC
8 Dateien WE-LHMI SMT Speicherdrossel 5030 -40 °C up to +125 °C 5.7 5.2 2.8 0.47 12.3 10.8 21.5 7.4 100 SMT
Muster
Artikel Nr. Daten­blatt Simu­lation Downloads ProduktserieCTol. CVR
(V (DC))
BauformBetriebstemperaturDF
(%)
RISOKeramiktypL
(mm)
W
(mm)
H
(mm)
Fl
(mm)
VerpackungL
(µH)
IRP,40K
(A)
ISAT1
(A)
ISAT,30%
(A)
RDC max.
(mΩ)
fres
(MHz)
MontageartEndurance
(h)
BetriebstemperaturIRIPPLE
(mA)
RESR
(mΩ)
ILeak
(µA)
Raster
(mm)
Ø D
(mm)
Muster