LM46001AQPWPTQ1

The LM46001-Q1 regulator is an easy-to-use synchronous step-down DC/DC converter capable of driving load currents up to 1A with an input voltage range of 3.5V to 60V. The LM46001-Q1 delivers excellent efficiency, output accuracy, and dropout voltage in an extremely small solution size. An extended family of pin-to-pin compatible devices is available with 0.5A and 2A load current options. Peak current mode control is employed for simple control loop compensation and cycle-by-cycle current limiting. Optional features include programmable switching frequency, synchronization, power-good flag, precision enable, internal soft-start, extendable soft-start, and tracking, providing a flexible and easy-to-use platform for a wide range of applications. Discontinuous conduction mode and automatic frequency reduction at light loads improve light-load efficiency. The family requires minimal external components, and the pin layout enables a simple, optimized PCB layout. Protection features include thermal shutdown, VCC undervoltage lockout, cycle-by-cycle current limiting, and output short-circuit protection. The LM46001-Q1 is available in a 16-pin HTSSOP (PWP) package (6.6mm × 5.1mm × 1.2mm) with a 0.65mm lead pitch. The device is pin-to-pin compatible with the LM4360x and LM4600x families. The LM46001A-Q1 version is optimized for PFM operation mode and is recommended for new designs.

Applications

• Automotive applications below AM band at 12V and 24V
• Telecom systems
• Commercial vehicle power supplies
• General-purpose wide VIN regulation
• High-efficiency point-of-load regulation

Key features

• Qualified for automotive applications with the following AEC-Q100 characteristics: Device Temperature Grade 1: –40°C to +125°C operating junction temperature range
• 24μA quiescent current in regulation
• High efficiency at light loads (DCM and PFM)
• Tested to EN55022/CISPR 22 EMI standards
• Integrated synchronous rectification
• Adjustable frequency range: 200kHz to 2.2MHz (default 500kHz)
• Synchronization to external clock frequency
• Internal compensation stable with almost any ceramic, polymer, tantalum, and aluminum capacitor
• Power Good indicator
• Soft-start into pre-biased loads
• Internal soft-start: 4.1ms
• Soft-start time extendable via external capacitor
• Output voltage tracking
• Precision enable for system UVLO
• Output short-circuit protection with hiccup mode
• Thermal shutdown protection
• Create custom designs using LM46001-Q1 with WEBENCH Power Designer