(ACTIVE) 3.5V to 60V, 3.5A Synchronous Step-Down Voltage Converter


Functional diagram


The LM76002/LM76003 regulator is an easy-to-use synchronous step-down DC-DC converter capable of driving up to 2.5 A (LM76002) or 3.5 A (LM76003) of load current from an input up to 60 V. The LM76002/LM76003 provides exceptional efficiency and output accuracy in a very small solution size. Peak current-mode control is employed. Additional features such as adjustable switching frequency, synchronization, FPWM option, power-good flag, precision enable, adjustable soft start, and tracking provide both flexible and easy-to-use solutions for a wide range of applications. Automatic frequency foldback at light load and optional external bias improve efficiency. This device requires few external components and has a pinout designed for simple PCB layout with best-in-class EMI (CISPR22) and thermal performance. Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and short-circuit protection. The LM76002/LM76003 device is available in the WQFN
30-pin leadless package with wettable flanks.


  • Integrated Synchronous Rectification
  • Input Voltage 3.5 V to 60 V (65 V Maximum)
  • Output Current:
    • LM76002: 2.5 A
    • LM76003: 3.5 A
  • Output Voltage 1 V to 95% VIN
  • 15-µA Quiescent Current in Regulation
  • Wide Voltage Conversion Range
    • tON-MIN = 65 ns (Typical)
    • tOFF-MIN = 95 ns (Typical)
  • System-Level Features
    • Synchronization to External Clock
    • Power-Good Flag
    • Precision Enable
    • Adjustable Soft Start (6.3 ms Default)
    • Voltage Tracking Capability
  • Pin-Selectable FPWM Operation
  • High-Efficiency at Light-Load Architecture (PFM)
  • Protection Features
    • Cycle-by-Cycle Current Limit
    • Short-Circuit Protection With Hiccup Mode
    • Overtemperature Thermal Shutdown Protection
  • Create a Custom Design Using the LM76002/03 With the WEBENCH® Power Designer

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Vin (Min) (V) 3.5   
Vin (Max) (V) 60   
Vout (Min) (V) 1   
Vout (Max) (V) 57   
Iout (Max) (A) 3.5   
Regulated Outputs (#) 1   
Switching Frequency (Min) (kHz) 300   
Switching Frequency (Max) (kHz) 2200   
Iq (Typ) (mA) 0.015   
Features Enable^Forced Pulse Width Modulation (FPWM) Mode^Frequency Synchronization^Light Load Efficiency^Power Good^Synchronous Rectification^Wettable Flanks Package   
Control Mode Current Mode   
Duty Cycle (Max) (%)  
Operating Temperature Range (C) -40 to 125   
Rating Catalog   
Package Group WQFN   

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