LM43602PWP

The LM43602 regulator is an easy-to-use synchronous step-down DC/DC converter capable of driving load currents up to 2A, with an input voltage range of 3.5V to 36V (42V absolute maximum). The LM43602 delivers excellent efficiency, output accuracy, and dropout voltage in a very compact solution size. Its extended family offers 0.5A, 1A, and 3A load current options in pin-to-pin compatible packages. The device employs peak current mode control for simplified control loop compensation and cycle-by-cycle current limiting. Optional features include programmable switching frequency, synchronization, power-good flag, precision enable, internal soft-start, adjustable soft-start and tracking, providing a flexible and easy-to-use platform for a wide range of applications. Discontinuous and automatic frequency modulation modes at light load enhance light-load efficiency. This family requires minimal external components, and its pin arrangement ensures simple, optimized PCB layout. Protection features include thermal shutdown, VCC UVLO, cycle-by-cycle current limiting, and output short-circuit protection. The LM43602 is available in a 16-pin HTSSOP package (5.1mm × 6.6mm × 1.2mm) and a 16-pin VSON package with wettable flanks.

Applications

• Industrial power supplies
• Telecom systems
• Automotive applications below AM band
• General-purpose wide VIN regulation, high-efficiency point-of-load regulation

Key features

• 27μA quiescent current
• High efficiency at light load (DCM and PFM)
• Compliant with EN55022/CISPR 22 EMI standards
• Integrated synchronous rectification
• Adjustable switching frequency: 200kHz to 2.2MHz (default 500kHz)
• Synchronization to external clock frequency
• Internal compensation
• Stable with virtually any combination of ceramic, solid electrolytic, tantalum, and aluminum capacitors
• Power Good flag
• Soft-start into pre-biased loads
• Internal soft-start: 4.1ms
• Soft-start time extendable via external capacitor
• Output voltage tracking
• Programmable UVLO precision enable
• Output short-circuit protection with hiccup mode
• Thermal shutdown protection
• Create custom designs with LM43602 using WEBENCH Power Designer