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LKWIC LKM4643B product image
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LKWIC LKM4643BRoHS

Manufacturer
LKWICAsian Brands
MPN
LKM4643B
LCSC Part #
C53233028
Packaging
BGA-77(9x15)
Customer #
Key Attributes
Step-down type 1MHz Adjustable 4A 600mV~3.3V BGA-77(9x15) Voltage Regulators - DC DC Switching Regulators RoHS
Datasheetpdf iconLKWIC LKM4643B
In-Stock: 147
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QtyUnit PriceTotal Amount
1+$ 18.7859$ 18.79
10+$ 17.9191$ 179.19
30+$ 16.4182$ 492.55
100+$ 15.1084$ 1510.84
Standard Packaging170/Full Tray
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Products Specifications

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TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Voltage Regulators - DC DC Switching Regulators
ManufacturerLKWIC
PackagingBGA-77(9x15)
Operating Temperature-40℃~+85℃
FunctionStep-down type
Number of Outputs4
Frequency - Switching1MHz
FeaturesCycle-by-cycle current limiting;Adjustable soft-start;Output voltage tracking;Frequency synchronization;Light load efficient mode;Operating status indication;Overcurrent Protection
TopologyBuck
Output TypeAdjustable
Operating Voltage4V~20V
Switch tube (built-in/external)Built-in
Output Current4A
Output Voltage600mV~3.3V
Quiescent Current2.1mA
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Additional Information

TypeDetails
Minimum1
Multiple1
Standard Packaging170
Sales UnitPiece

Introduction

AI Translation

LKM4643B is a quad-output DC/DC step-down µModule regulator, delivering 4A continuous output current per channel. Outputs can be paralleled, with a maximum load current of 16A when all four channels are paralleled. The module integrates a switching controller, power FETs, inductors, and supporting components. It operates from a 4V–20V input voltage range, or 2.375V–20V with an external bias supply, supporting an output voltage range of 0.6V–3.3V, requiring only bulk input and output capacitors. The device integrates four independent constant-frequency, controlled on-time, valley current mode regulators. The typical switching frequency is set at 1MHz and can be externally synchronized to 700kHz–1.3MHz. Through current mode control and internal feedback loop compensation, the module provides excellent stability and transient performance. Current mode control supports channel paralleling and accurate current sharing, with built-in clock interleaving for 2+2, 3+1, or 4-channel parallel operation. CLKIN and CLKOUT pins are provided for multi-device frequency synchronization or multiphase daisy-chain operation. The device offers cycle-by-cycle current monitoring, foldback current limiting, overvoltage/undervoltage protection, and DCM can be enabled via the MODE pin for improved light-load efficiency. The TRACK/SS pin is used for power supply tracking and soft-start programming, and the module incorporates an internal temperature diode for temperature monitoring.

Features

AI Translation
  • Quad-channel step-down µModule regulator
  • 4A DC output current per channel
  • Wide input voltage range: 4V~20V; VIN: 2.375V~20V with SVIN external bias
  • Output voltage range: 0.6V~3.3V
  • Output voltage accuracy: ±1.5%
  • Current mode control, fast transient response
  • Supports multi-phase paralleling for higher output current
  • Supports output voltage tracking
  • Internal temperature monitor output
  • Supports external frequency synchronization
  • OVP, OCP, and OTP protection
  • Operating temperature range: -40℃~+85℃
  • Package: BGA77 (9.00mm×15.00mm×2.50mm)

Applications

AI Translation
  • Multi-rail point-of-load regulation
  • FPGA, DSP, and ASIC applications