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Microchip LX7176A | Demoboard LX7176A

LX7176A 4 Amp Step Down Converter

Overview

TopologyBuck Converter
Input voltage3-5.5 V
Output 15.5 V / 4 A
IC revision0.1

Description

The LX7176A 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 LX7176A reference voltage is 0.6V.The LX7176A 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 LX7176A automatically restarts when all fault conditions are cleared. Internal soft start circuitry limits start up inrush currents.

Features

  • 0-4A Step-down Regulator
  • Operational Input Supply Voltage Range: 3V-5.5V (short durations to 6.5V.)
  • Hysteretic control offers best transient response
  • CCM switching at a constant 1.65MHz
  • Automatically switches to DCM switching under light loads to improve efficiency
  • 100% Duty Ratio Operation
  • Input under voltage and over voltage protection
  • Enable and Power Good Function
  • Internal soft-start
  • Cycle-by-Cycle Over Current Protection
  • Hiccup Mode protects against short circuit faults
  • RoHS Compliant

Typical applications

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

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesCTol. CVR
(V (DC))
SizeOperating TemperatureDF
(%)
RISOCeramic TypeL
(mm)
W
(mm)
H
(mm)
Fl
(mm)
PackagingL
(µH)
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC max.
(mΩ)
fres
(MHz)
MountEndurance
(h)
Operating TemperatureIRIPPLE
(mA)
RESR
(mΩ)
ILeak
(µA)
Pitch
(mm)
Ø D
(mm)
Samples
885012207026SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WCAP-CSGP MLCCs 10 V(DC)10 µF ±10% 10 0805 -55 °C up to +125 °C 100.01 GΩ X7R Class II 2 1.25 1.25 0.5 7" Tape & Reel
885012107005SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WCAP-CSGP MLCCs 6.3 V(DC)22 µF ±20% 6.3 0805 -55 °C up to +85 °C 150.005 GΩ X5R Class II 2 1.25 1.25 0.5 7" Tape & Reel
870055674005SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.WCAP-PTHR Aluminum Polymer Capacitors47 µF ±20% 35 12 11.5 Ammopack Radial THT 2000 -55 °C up to +105 °C 2890 25 329 3.5 8
74437324010SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

8 files Active i| Production is active. Expected lifetime: >10 years.WE-LHMI SMT Power Inductor 4020 -40 °C up to +125 °C 4.45 4.06 1.8 1 6.2 6.5 12.5 27 89 SMT -40 °C up to +125 °C
Order Code Data­sheet Simu­lation
885012207026SPEC
885012107005SPEC
870055674005SPEC
74437324010SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesCTol. CVR
(V (DC))
SizeOperating TemperatureDF
(%)
RISOCeramic TypeL
(mm)
W
(mm)
H
(mm)
Fl
(mm)
PackagingL
(µH)
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC max.
(mΩ)
fres
(MHz)
MountEndurance
(h)
Operating TemperatureIRIPPLE
(mA)
RESR
(mΩ)
ILeak
(µA)
Pitch
(mm)
Ø D
(mm)
Samples