Analog Devices MAX77504 Product Info

• 3A Single-Channel Buck Regulator
• 2.6V to 14V Input Voltage
• 0.6V to 6V Output Voltage Range
• 0.5MHz to 1.5MHz Fixed-Frequency Switching Options 
• High Efficiency, Low I_Q Extends Battery Life
  • 94% Peak Efficiency at 7.4V_IN, 3.3V_OUT (2520 Inductor)
  • 10μA I_SUP (12V_IN, 1.8V_OUT)
  • OUT Powers V_L Automatically (V_OUT > 1.7V) for Low I_Q
• Enable Pin (EN) for Direct Hardware Control
• Extenal Clock Synchronization Is Available Through the FPWM/SYNC Pin
• Power-OK Output (POK) Monitors V_OUT Quality (See Ordering Information)
• Protection Features
  • Cycle-by-Cycle Inductor Current Limit
  • Short-Circuit Hiccup Mode, UVLO, and Thermal Shutdown Protection
  • Soft-Start 
• FC2QFN or WLP Package Option
  • 2.5mm x 2.5mm (0.6mm max. height) 12-Lead FC2QFN, 0.5mm Pitch
  • 1.7mm x 1.7mm (0.7mm max. height) 16-Bump WLP, 0.4mm Pitch, 4 x 4 Array
• All WLP Package Bumps (Except POK) Routeable on a Non-HDI PCB

The MAX77504 is a synchronous 3A step-down DC-DC converter optimized for portable 2-cell and 3-cell battery-operated applications. The converter operates on an input supply between 2.6V and 14V. Output voltage is adjustable between 0.6V and 6V with external feedback resistors. The device features a low-I_Q SKIP mode that allows excellent efficiency at light loads. The MAX77504 can be sychronized by driving the FPWM pin with an external clock.

Dedicated enable, power-OK, and FPWM pins allow simple hardware control. The SEL input easily configures switching frequency, gain, and output active discharge option. Built-in undervoltage lockout (UVLO), output active discharge, cycle-by-cycle inductor current limit, thermal shutdown, and short-circuit protection ensure safe operation under abnormal operating conditions.

The MAX77504 is offered in a small 1.7mm x 1.7mm, 16-bump, 0.4mm pitch wafer-level package (WLP) or a 2.5mm x 2.5mm, 12-lead, 0.5mm pitch flip-chip QFN (FC2QFN).

Applications

• 1- to 3-Cell Li+/Li-ion Battery-Powered Devices
• Professional Radio, Handheld Computers
• Mirrorless Cameras, DSLR, and Notebook Computers
• Portable Scanners, POS Terminals, Printers
• Space-Constrained Portable Electronics