ISL6520

ISL6520 Description

ISL6520 Description

ISL6520 Categories

ISL6520 Manufacturer

ISL6520 Datasheet (PDF)

ISL6520 Price & Availability

ISL6520 Features

• Operates from +5V Input
• 0.8VtoVIN Output Range
  • 0.8V Internal Reference
  • ?1.5% Over Line Voltage and Temperature
• Drives N-Channel MOSFETs
• Simple Single-Loop Control Design
  • Voltage-Mode PWM Control
• Fast Transient Response
  • High-Bandwidth Error Amplifier
  • Full 0% to 100% Duty Cycle
• Lossless, Programmable Over-Current Protection
  • Uses Upper MOSFET?s rDS(on)
• Small Converter Size
  • 300kHz Fixed Frequency Oscillator
  • Internal Soft Start
  • 8-Lead SOIC Package

ISL6520 Features

• Operates from +5V Input
• 0.8V to V_IN Output Range
  • 0.8V Internal Reference
  • ±1.5% Over Line Voltage and Temperature
• Drives N-Channel MOSFETs
• Simple Single-Loop Control Design
  • Voltage-Mode PWM Control
• Fast Transient Response
  • High-Bandwidth Error Amplifier
  • Full 0% to 100% Duty Cycle
• Lossless, Programmable Over-Current Protection
  • Uses Upper MOSFET's rDS(on)
• Small Converter Size
  • 300kHz Fixed Frequency Oscillator
  • Internal Soft Start
  • 8 Ld SOIC or 16Ld 4x4mm QFN
• QFN Package:
  • Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat No Leads - Package Outline
  • Near Chip Scale Package footprint, which improves PCB efficiency and has a thinner profile
• Pb-Free Plus Anneal Available (RoHS Compliant)

ISL6520 Description

The ISL6520 makes simple work out of implementing a complete control and protection scheme for a DC-DC stepdown converter. Designed to drive N-channel MOSFETs in a synchronous buck topology, the ISL6520 integrates the control, output adjustment, monitoring and protection functions into a single 8-pin package.

The ISL6520 provides simple, single feedback loop, voltagemode control with fast transient response. The output voltage can be precisely regulated to as low as 0.8V, with a maximum tolerance of ±1.5% over temperature and line voltage variations. A fixed frequency oscillator reduces design complexity, while balancing typical application cost and efficiency.

The error amplifier features a 15MHz gain-bandwidth product and 8V/µs slew rate which enables high converter bandwidth for fast transient performance. The resulting PWM duty cycles range from 0% to 100%.

Protection from over-current conditions is provided by monitoring the rDS(ON) of the upper MOSFET to inhibit PWM operation appropriately. This approach simplifies the implementation and improves efficiency by eliminating the need for a current sense resistor.