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Automotive Qualified 3.5V to 36V, 3A Synchronous Step-Down Voltage Converter


Package | PIN: PWP | 16
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $4.21
10-24 $3.78
25-99 $3.54
100-249 $3.17
250-499 $2.96
500-749 $2.57
750-999 $2.23
1000+ $2.18


  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C Operating JunctionTemperature
  • 27-µA Quiescent Current in Regulation
  • High Efficiency at Light Load (DCM and PFM)
  • Meets EN55022/CISPR 22 EMI Standards
  • Integrated Synchronous Rectification
  • Adjustable Frequency Range: 200 kHz to 2.2 MHz (500 kHz default)
  • Frequency Synchronization to External Clock
  • Internal Compensation
  • Stable With Almost any Combination of Ceramic, Polymer, Tantalum, and Aluminum Capacitors
  • Power-Good Flag
  • Soft Start into a Pre-Biased Load
  • Internal Soft Start: 4.1 ms
  • Extendable Soft-Start Time by External Capacitor
  • Output Voltage Tracking Capability
  • Precision Enable to a Program System UVLO
  • Output Short Circuit Protection with Hiccup Mode
  • Overtemperature Thermal Shutdown Protection
  • Create a Custom Design Using the LM43603-Q1 With the WEBENCH® Power Designer

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Texas Instruments  LM43603AQPWPRQ1

The LM43603-Q1 regulator is an easy-to-use synchronous step-down DC-DC converter capableof driving up to 3 A of load current from an input voltage ranging from 3.5 V to 36 V (42 Vabsolute maximum). The LM43603-Q1 provides exceptional efficiency, output accuracy, and dropoutvoltage in a very small solution size. An extended family is available in 0.5-A, 1-A, and 2-A loadcurrent options in pin-to-pin compatible packages. Peak current mode control is employed to achievesimple control loop compensation and cycle-by-cycle current limiting. Optional features such asprogrammable switching frequency, synchronization, power-good flag, precision enable, internalsoft-start, extendable soft start, and tracking provide a flexible and easy to use platform for awide range of applications. Discontinuous conduction and automatic frequency modulation at lightloads improve light load efficiency. The family requires few external components and pinarrangement allows simple, optimum PCB layout. Protection features include thermal shutdown,VCC undervoltage lockout, cycle-by-cycle current limit, and output shortcircuit protection. The LM43603-Q1 device is available in the HTSSOP (PWP) 16-pin leaded package(6.6 mm × 5.1 mm × 1.2 mm). The LM43603A-Q1 version is optimized for PFM operation and recommendedfor new design. The device is pin-to-pin compatible with LM4360x and LM4600x family.