ISL6527A

ISL6527A Description

ISL6527A Description

ISL6527A Categories

ISL6527A Manufacturer

ISL6527A Datasheet (PDF)

ISL6527A Price & Availability

ISL6527A Features

• Operates from 3.3V to 5V input
• Utilizes an external reference
• 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 overcurrent protection
  • Uses upper MOSFET's rDS(ON)
• Converter can source and sink current
• Small converter size
  • Internal fixed frequency oscillator
    
    - ISL6527: 300kHz
    
    - ISL6527A: 600kHz
  • Internal soft-start
  • 14-pin SOIC or 16-lead, 5x5 MLFP
• MLFP 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

ISL6527A Features

• Operates from 3.3V to 5V Input
• Utilizes an External Reference
• 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 Overcurrent Protection
  • Uses Upper MOSFET's r_DS(ON)
• Converter Can Source and Sink Current
• Small Converter Size
  • Internal Fixed Frequency Oscillator
  • ISL6527: 300kHz
  • ISL6527A: 600kHz
• Internal Soft-Start
• 14 Ld SOIC or 16 Ld 5x5 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 (RoHS compliant)

ISL6527A Description

The ISL6527, ISL6527A make simple work out of implementing a complete control and protection scheme for a DC/DC step-down converter. Designed to drive N-Channel MOSFETs in a synchronous buck topology, the ISL6527, ISL6527A integrate the control, output adjustment, monitoring and protection functions into a single package.

The ISL6527, ISL6527A provide simple, single feedback loop, voltage-mode control with fast transient response. The output voltage can be regulated to as low as the provided external reference. A fixed frequency oscillator reduces design complexity, while balancing typical application cost and efficiency.

The error amplifier features a 15MHz gain-bandwidth product and 6V/μs slew rate, which enables high converter bandwidth for fast transient performance. The resulting PWM duty cycles range from 0% to 100%.

Protection from overcurrent conditions is provided by monitoring the r_DS(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.

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