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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

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

Products

Order Code Data­sheet Simu­lation Downloads Product seriesCTol. CVR
(V (DC))
SizeOperating TemperatureQ
(%)
DF
(%)
RISOCeramic TypeL
(mm)
W
(mm)
H
(mm)
Fl
(mm)
PackagingL
(µH)
IRP,40K
(A)
ISAT,30%
(A)
RDC typ.
(mΩ)
fres
(MHz)
V
(V)
Mount Samples
885012007009SPEC
8 files WCAP-CSGP MLCCs 10 V(DC)10 nF ±5% 10 0805 -55 °C up to +125 °C 100010 GΩ NP0 Class I 2 1.25 1.25 0.5 7" Tape & Reel
885012207016SPEC
8 files WCAP-CSGP MLCCs 10 V(DC)100 nF ±10% 10 0805 -55 °C up to +125 °C 55 GΩ X7R Class II 2 1.25 0.8 0.5 7" Tape & Reel
885012208069SPEC
8 files WCAP-CSGP MLCCs 25 V(DC)10 µF ±10% 25 1206 -55 °C up to +125 °C 100.01 GΩ X7R Class II 3.2 1.6 1.6 0.5 7" Tape & Reel
885012107005SPEC
8 files WCAP-CSGP MLCCs 6.3 V(DC)22 µF ±20% 6.3 0805 -55 °C up to +85 °C 100.005 GΩ X5R Class II 2 1.25 1.25 0.5 7" Tape & Reel
74438357047SPEC
9 files WE-MAPI SMT Power Inductor 4030 -40 °C up to +125 °C 4 4 3 4.7 5.1 8.2 39.9 24 80 SMT
Samples
Order Code Data­sheet Simu­lation Downloads Product seriesCTol. CVR
(V (DC))
SizeOperating TemperatureQ
(%)
DF
(%)
RISOCeramic TypeL
(mm)
W
(mm)
H
(mm)
Fl
(mm)
PackagingL
(µH)
IRP,40K
(A)
ISAT,30%
(A)
RDC typ.
(mΩ)
fres
(MHz)
V
(V)
Mount Samples