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reference designLX7104 | Demoboard LX7104

Microchip LX7104 | Demoboard LX7104

LX7104 1.4MHz 1.5A Asynchronous Buck Converter

Overview

TopologyBuck Converter
Input voltage4.5-18 V
Output 115 V / 1.5 A
IC revision1.0

Description

The LX7104 is a 1.4MHz fixed frequency, current mode, PWM buck (step-down) DC-DC converter, capable of driving a 1.5A load with high efficiency, excellent line and load regulation. The device integrates a N-channel power MOSFET switch with low on-resistance. The converter accepts a wide input voltage range from 4.5V to 18V, and provides an output voltage adjustable typically from 0.81 to 15V.Soft-start is built in, and current mode control provides fast transient response and cycle-by-cycle current limit. Short circuit protection will be triggered when current is over limit and FB is below 0.25V.The LX7104ISF is available in SOT23-6 package.

Features

  • Input Supply Range: 4.5V to 18V
  • Output Voltage Adjustable from 0.81V to 15V
  • Integrated High-Side NMOS Switch
  • Current Mode Control
  • Output Current: 1.5A
  • Fixed 1.4MHz Frequency
  • High Efficiency: Up To 92%
  • Built-in Soft-start
  • Built-in OV, UV & OT Protection
  • Cycle-by-cycle Over Current Protection
  • Short Circuit Protection
  • RoHS Compliant & Halogen Free

Typical applications

  • Portable DVD
  • LCD TV’s / Monitor/DPF

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
C
Tol. C
VR(V (DC))
Size
Operating Temperature
Q
DF(%)
RISO
Ceramic Type
L(mm)
W(mm)
H(mm)
Fl(mm)
Packaging
L(µH)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
fres(MHz)
VOP(V)
Mount
SamplesAvailability & Sample
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885012007009
SPECWCAP-CSGP MLCCs 10 V(DC), 10 nF, ±5%
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 10 V(DC)
Capacitance10 nF
Capacitance±5% 
Rated Voltage10 V (DC)
Size0805 
Operating Temperature -55 °C up to +125 °C
Q-Factor1000 
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Insulation Resistance10 GΩ
Ceramic TypeNP0 Class I 
Length2 mm
Width1.25 mm
Height1.25 mm
Pad Dimension0.5 mm
Packaging7" Tape & Reel 
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885012207016
SPECWCAP-CSGP MLCCs 10 V(DC), 100 nF, ±10%
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 10 V(DC)
Capacitance100 nF
Capacitance±10% 
Rated Voltage10 V (DC)
Size0805 
Operating Temperature -55 °C up to +125 °C
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Dissipation Factor5 %
Insulation Resistance5 GΩ
Ceramic TypeX7R Class II 
Length2 mm
Width1.25 mm
Height0.8 mm
Pad Dimension0.5 mm
Packaging7" Tape & Reel 
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885012208069
SPECWCAP-CSGP MLCCs 25 V(DC), 10 µF, ±10%
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 25 V(DC)
Capacitance10 µF
Capacitance±10% 
Rated Voltage25 V (DC)
Size1206 
Operating Temperature -55 °C up to +125 °C
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Dissipation Factor10 %
Insulation Resistance0.01 GΩ
Ceramic TypeX7R Class II 
Length3.2 mm
Width1.6 mm
Height1.6 mm
Pad Dimension0.5 mm
Packaging7" Tape & Reel 
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885012107005
SPECWCAP-CSGP MLCCs 6.3 V(DC), 22 µF, ±20%
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 6.3 V(DC)
Capacitance22 µF
Capacitance±20% 
Rated Voltage6.3 V (DC)
Size0805 
Operating Temperature -55 °C up to +85 °C
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Dissipation Factor15 %
Insulation Resistance0.005 GΩ
Ceramic TypeX5R Class II 
Length2 mm
Width1.25 mm
Height1.25 mm
Pad Dimension0.5 mm
Packaging7" Tape & Reel 
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74438357047
SPECWE-MAPI SMT Power Inductor, –, –

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.

Simu­lation
Availability
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Downloads10 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
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Size4030 
Operating Temperature -40 °C up to +125 °C
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Length4.3 mm
Width4.3 mm
Height3.1 mm
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Inductance4.7 µH
Performance Rated Current5.1 A
Saturation Current @ 30%8.2 A
DC Resistance39.9 mΩ
Self Resonant Frequency24 MHz
Operating Voltage80 V
MountSMT 
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