Device Information
 
 
ISL8105 Printer Friendly Version
1V to 12V Single-Phase Synchronous Buck Converter PWM Controller with Integrated MOSFET Gate Drivers
 
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Datasheet
Adobe Acrobat Document ISL8105
1V to 12V Single-Phase Synchronous Buck Converter PWM Controller with Integrated MOSFET Gate Drivers
VIN (min) (V)1
VIN (max) (V)12
VOUT (min) (V).6
VOUT (max) (V)5
IOUT (max) (A)25
VBIAS (V)5, 12
IS (typ) (mA)3.2
 

Product Information

Key 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)
    • 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 Plus Anneal Available (RoHS Compliant)
Description

The ISL8105 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 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 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.

Pricing / Packaging / Samples / Ordering

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Part No.Design-In
Status		Temp.PackageMSLPrice
US $		PB Free
ISL8105CRZ Active Comm 10 Ld DFN 1 0.95 PB Free Buy Direct Disti-Buy Sample
ISL8105CRZ-T Active Comm 10 Ld DFN T+R 1 0.95 PB Free Disti-Buy  
ISL8105IBZ Active Ind 8 Ld SOIC 1 1.48 PB Free Buy Direct Disti-Buy Sample
ISL8105IBZ-T Active Ind 8 Ld SOIC T+R 1 1.48 PB Free Disti-Buy  
ISL8105IRZ Active Ind 10 Ld DFN 1 1.22 PB Free Out of stock Disti-Buy Sample
ISL8105IRZ-T Active Ind 10 Ld DFN T+R 1 1.22 PB Free Out of stock Disti-Buy  
The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice.
MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020
SMD = Standard Microcircuit Drawing

Technical Documentation

Datasheet(s):
Tools And Support
iSim Design Simulation
Application Block Diagrams
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
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