MaxLinear MXL76503 | Demoboard MXL76503 EVK

Description

The MxL76503 is a fully integrated, high-efficiency synchronous step-down converter that requires a minimum number of external components. It offers a very compact solution with up to 3A continuous output current over a wide input range.The MxL76503 uses a proprietary constant on-time (COT) control scheme that provides a superior transient response and maintains a constant switching frequency during continuous conduction mode (CCM) operation. The external ramp compensation network enables stable operation with ultra-low equivalent series resistance (ESR) output ceramic capacitors. An internal compensated error amplifier in the control loop provides excellent line and load regulation.The MxL76503 integrates extensive protection functions, including under-voltage lockout (UVLO), over-current protection (OCP), under-voltage protection (UVP), and thermal shutdown.The MxL76503 offers two modes of operation, PFM (MxL76503N) and forced PWM—FPWM—(MxL76503A), to suit different applications. PFM mode provides high efficiency at light loads and low standby power. FPWM mode provides low ripple voltage and fast transient, even at light loads.The converter is available in a small 6-pin SOT23-6L package.

Features

• Input voltage range: 4.5V to 18V
• Output voltage range: 0.6V to 18V
• 3A continuous output current
• Supports 100% duty cycle low-dropout operation
• Stable operation with low ESR ceramic output capacitors
• Fast pulse-width modulation (PWM) COT control with superior transient performance
• 720kHz switching frequency
• 1.2ms internal soft-start
• 80m/56m integrated high-side (HS)/low-side (LS) power switches
• Accurate EN/UVLO threshold
• High-efficiency operation at light load (MxL76503N)
• FPWM mode of operation (MxL76503A)
• Thermal shutdown with auto-recovery
• Hiccup mode short-circuit protection
• Available in a 6-pin SOT23-6L package

Typical applications

• Laptop computers, Tablet PCs, Personal video recorders, Flat panel television and monitors
• Distributed power systems
• Networking systems

More information

• IC product information