+5V or +12V Single-Phase Synchronous Buck Converter PWM Controller with Integrated MOSFET Gate Drivers
Overview
Description
The ISL8105, ISL8105A is a simple single-phase PWM controller for a synchronous buck converter. It operates from +5V or +12V bias supply voltage. With integrated linear regulator, boot diode, and N-Channel MOSFET gate drivers, the ISL8105, ISL8105A reduces external component count and board space requirements. These make the IC suitable for a wide range of applications. Utilizing voltage-mode control, the output voltage can be precisely regulated to as low as 0. 6V. The 0. 6V internal reference features a maximum tolerance of ±1. 0% over the commercial temperature range, and ±1. 5% over the industrial temperature range. Two fixed oscillator frequency versions are available; 300kHz (ISL8105 for high efficiency applications) and 600kHz (ISL8105A for fast transient applications). The ISL8105, ISL8105A features the capability of safe start-up with pre-biased load. It also provides overcurrent protection by monitoring the ON-resistance of the bottom-side MOSFET to inhibit PWM operation appropriately. During start-up interval, the resistor connected to BGATE/BSOC pin is employed to program overcurrent protection condition. This approach simplifies the implementation and does not deteriorate converter efficiency.
Features
- Operates from +5V or +12V Bias Supply Voltage
- 1.0V to 12V Input Voltage Range (up to 20V possible with restrictions; see "Input Voltage Considerations" on page 9)
- 0.6V to VIN Output Voltage Range
- 0.6V Internal Reference Voltage
- ±1.0% Tolerance Over the Commercial Temperature Range (0°C to +70°C)
- ±1.5% Tolerance Over the Industrial Temperature Range (-40°C to +85°C).
- Integrated MOSFET Gate Drivers that Operate from VBIAS (+5V to +12V)
- Bootstrapped High-side Gate Driver with Integrated Boot Diode
- Drives N-Channel MOSFETs
- Simple Voltage-Mode PWM Control
- Traditional Dual Edge Modulation
- Fast Transient Response
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Cycle
- Fixed Operating Frequency
- 300kHz for ISL8105
- 600kHz for ISL8105A
- Fixed Internal Soft-Start with Pre-biased Load Capability
- Lossless, Programmable Overcurrent Protection
- Uses Bottom-side MOSFET's rDS(ON)
- Enable/Disable Function Using COMP/EN Pin
- Output Current Sourcing and Sinking Currents
- Pb-Free (RoHS Compliant)
Applications
- 5V or 12V DC/DC Regulators
- Industrial Power Systems
- Telecom and Datacom Applications
- Test and Measurement Instruments
- Distributed DC/DC Power Architecture
- Point of Load Modules
Documentation
| Title | Type | Date | |
|---|---|---|---|
PDF1.12 MB
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Datasheet
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PDF509 KB
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Application Note
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PDF397 KB
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Application Note
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PDF106 KB
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Product Advisory
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PDF363 KB
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Product Advisory
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PDF326 KB
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Product Change Notice
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PDF266 KB
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Product Change Notice
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PDF294 KB
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Product Change Notice
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PDF108 KB
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Product Change Notice
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PDF248 KB
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Product Change Notice
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PDF846 KB
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White Paper
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Design & Development
Software & Tools
Software & Tool Pages
| Title | Type | Company |
|---|---|---|
| iSim:PE Offline Simulation TooliSim Personal Edition (iSim:PE) speeds the design cycle and reduces risk early in any project, identifying parts that can be used in current as well as next-generation designs. | Simulator | Renesas |
Boards & Kits
Boards & Kits
Buck Converter PWM Controller with Integrated MOSFET Gate Drivers Evaluation Board
Featured Documents:
Models
ECAD Models
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