Features

• Complete Switch Mode Power Supply
• Wide Input Voltage Range: 4.5V to 60V
• (7.5V Minimum Voltage to Start)
• Wide Output Voltage Range: 2.5V to 24V (See Table 2)
• 4A Output Current
• Programmable Soft-Start
• 9μA Shutdown Supply Current
• Selectable Switching Frequency Current Mode Control
• Up to 95% Efficiency
• SnPb (BGA) or RoHS Compliant (LGA and BGA) Finish
• Surface Mount LGA (15mm × 15mm × 4.32mm)
• and (15mm × 15mm × 4.92mm) BGA Packages

Typical Application

Description

The LTM®8027 is a complete 4A, DC/DC step-down power supply. Included in the package are the switching controller, power switches, inductor and all support components. Operating over an input voltage range of 4.5V to 60V (7.5V minimum voltage to start), the LTM8027 supports output voltages up to 24V, and a switching frequency range of 100kHz to 500kHz, each set by a single resistor. Only the bulk input and output filter capacitors are needed to finish the design.

The low profile package (4.32mm) enables utilization of unused space on the bottom of PC boards for high density point of load regulation. A built-in soft-start timer is adjustable with a small capacitor.

The LTM8027 is packaged in a compact (15mm × 15mm × 4.32mm) over-molded land grid array (LGA) and (15mm × 15mm × 4.92mm) BGA package suitable for automated assembly by standard surface mount equipment. The LTM8027 is available with SnPb (BGA) or RoHS compliant terminal finish.