LM43601PWPR

The LM43601 regulator is an easy to use synchronous step- down DC- DC converter capable of driving up to 1 A of load current from an input voltage ranging from 3.5V to 36V (42V transient). The LM43601 provides exceptional efficiency, output accuracy, and dropout voltage in a very small solution size. An extended family is available in 0.5- A, 2- A and 3- A load current options in pin- to- pin compatible packages. 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 a wide range of applications. Discontinuous conduction and automatic frequency modulation at light loads improve light load efficiency. The family requires few external components and pin arrangement allows simple, optimum PCB layout. Protection features include thermal shutdown, VCC undervoltage lockout, cycle- by- cycle current limit, and output short- circuit protection. The LM43601 device is available in the 16- leaded HTSSOP (PWP) package (6.6 mm x 5.1 mm x 1.2 mm) with 0.65- mm lead pitch. This device is pin- to- pin compatible with LM46000, LM46001, LM46002, LM43600, LM43602, and LM43603.

Applications

• Industrial Power Supplies
• Telecommunications Systems
• Sub-AM Band Automotive
• General Purpose Wide VIN Regulation
• High Efficiency Point-Of-Load Regulation

Key features

• 33-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 Pre-Biased Load
• Internal Soft Start: 4.1 ms
• Extendable Soft-Start Time by External Capacitor
• Output Voltage Tracking Capability
• Precision Enable to Program System UVLO
• Output Short-Circuit Protection With Hiccup Mode
• Overtemperature Thermal Shutdown Protection
• Create a Custom Design Using the LM43601 With the WERBENCH® Power Designer