Texas Instruments LM4600x/LM4600x-Q1 Step-Down Voltage Converter

Texas Instruments LM4600x/LM4600x-Q1 SIMPLE SWITCHER® Regulators are an easy-to-use synchronous step-down DC-DC converter capable of driving up to 2A of load current from an input voltage range of 3.5V to 60V. The LM4600x/LM4600x-Q1 provides exceptional efficiency, output accuracy, and drop-out voltage in a very small solution size. Peak current-mode control is employed to achieve simple control loop compensation and cycle-by-cycle current limiting. Optional features such as programmable switching frequency, synchronization, power-good flag, precision enable, internal soft-start, extendable soft-start, and tracking provide a flexible and easy-to-use platform for various applications. Discontinuous conduction and automatic frequency modulation at light loads improve light load efficiency. The Texas Instruments LM4600x/LM4600x-Q1 requires few external components, and pin arrangement allows a simple optimum PCB layout. Protection features include thermal shutdown, VCC under-voltage lockout, cycle-by-cycle current limit, and output short circuit protection.

Features

  • 24µA or 27µA quiescent current in regulation
  • High efficiency at light load (DCM and PFM)
  • Meets EN55022/CISPR 22 EMI standards
  • Integrated synchronous rectification
  • 200kHz to 2.2MHz (500kHz default) adjustable frequency range
  • Frequency synchronization to an external clock
  • Stable with almost any combination of Ceramic, Polymer, Tantalum, and Aluminum Capacitors
  • Internal compensation
  • Power-Good flag
  • Soft-Start into a pre-biased load
  • 4.1ms internal soft-start 
  • Extendable soft-start time by an external capacitor
  • Output voltage tracking capability
  • A precision enable to program system UVLO
  • Output short circuit protection with hiccup mode
  • Over-temperature thermal shutdown protection

Applications

  • Industrial power supplies
  • Telecommunications systems
  • Sub-AM band automotive
  • Commercial vehicle power supplies
  • General purpose wide VIN regulation
  • High-efficiency Point-of-Load (PoL) regulation

Videos

Simplified Schematic

Schematic - Texas Instruments LM4600x/LM4600x-Q1 Step-Down Voltage Converter
View Results ( 15 ) Page
零件編號 規格書 輸出電壓 輸出電流 交換頻率 靜止電流 運作供電電流
LM46001PWPT LM46001PWPT 規格書 1 V to 28 V 1 A 2.2 MHz 24 uA 24 uA
LM46002AQPWPRQ1 LM46002AQPWPRQ1 規格書 1 V to 28 V 2 A 200 kHz to 2.2 MHz 27 uA
LM46001AQPWPRQ1 LM46001AQPWPRQ1 規格書 1 V to 28 V 1 A 500 kHz 24 uA
LM46000PWP LM46000PWP 規格書 1 V to 28 V 500 mA 2.2 MHz 24 uA 24 uA
LM46001PWP LM46001PWP 規格書 1 V to 28 V 1 A 2.2 MHz 24 uA 24 uA
LM46000AQPWPRQ1 LM46000AQPWPRQ1 規格書 1 V to 28 V 500 mA 500 kHz 7 uA, 24 uA, 85 uA
LM46001PWPR LM46001PWPR 規格書 1 V to 28 V 1 A 2.2 MHz 24 uA 24 uA
LM46002AQPWPTQ1 LM46002AQPWPTQ1 規格書 1 V to 28 V 2 A 200 kHz to 2.2 MHz 27 uA
LM46002PWPR LM46002PWPR 規格書 1 V to 28 V 2 A 2.2 MHz 27 uA 27 uA
LM46002PWPT LM46002PWPT 規格書 1 V to 28 V 2 A 2.2 MHz 27 uA 27 uA
發佈日期: 2014-08-29 | 更新日期: 2025-03-05