Monolithic 4 Amp DC/DC Step-Down Regulator

The EL7563 is an integrated, full-featured synchronous stepdown regulator with output voltage adjustable from 1.0V to 2.5V. It is capable of delivering 4A continuous current at up to 95% efficiency. The EL7563 operates at a constant frequency pulse width modulation (PWM) mode, making external synchronization possible. Patented on-chip resistorless current sensing enables current mode control, which provides cycle-by-cycle current limiting, over-current protection, and excellent step load response. The EL7563 features power tracking, which makes the start-up sequencing of multiple converters possible. A junction temperature indicator conveniently monitors the silicon die temperature, saving the designer time on the tedious thermal characterization. The minimal external components and full functionality make this EL7563 ideal for desktop and portable applications.

Features
• Integrated synchronous MOSFETs and current mode controller
• 4A continuous output current
• Up to 95% efficiency
• Internal patented current sense
• Cycle-by-cycle current limit
• 3V to 3.6V input voltage
• Adjustable output voltage 1V to 2.5V
• Precision reference
• ±0.5% load and line regulation
• Adjustable switching frequency to 1MHz
• Oscillator synchronization possible
• Internal soft-start
• Over-voltage protection
• Junction temperature indicator
• Over-temperature protection
• Under-voltage lockout
• Multiple supply start-up tracking
• Power-good indicator
• 20-pin SO (0.300”) package
• 28-pin HTSSOP package
• Pb-Free available (RoHS compliant)

Applications
• DSP, CPU core, and I/O supplies
• Logic/Bus supplies
• Portable equipment
• DC/DC converter modules
• GTL + Bus power supply