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ISL8105AIBZ from INTERSIL

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ISL8105AIBZ

Manufacturer: INTERSIL, INTERSIL/PBF

5V or 12V Single-Phase Synchronous Buck Converter PWM Controller withIntegrated MOSFET Gate Drivers

Partnumber Manufacturer Quantity Availability
ISL8105AIBZ INTERSIL, INTERSIL/PBF 918 In Stock

Description and Introduction

5V or 12V Single-Phase Synchronous Buck Converter PWM Controller withIntegrated MOSFET Gate Drivers The **ISL8105AIBZ** is a **synchronous buck PWM controller** manufactured by **Intersil** (now part of Renesas Electronics). Below are its key specifications, descriptions, and features based on available data:

### **Specifications:**
- **Input Voltage Range:** 4.5V to 14V  
- **Output Voltage Range:** Adjustable down to 0.8V  
- **Switching Frequency:** Adjustable from 100kHz to 1MHz  
- **Maximum Duty Cycle:** 100%  
- **Output Current:** Supports high-current applications (external MOSFETs required)  
- **Efficiency:** Up to 95% (depending on external components)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Lead SOIC  

### **Descriptions:**
- Designed for **DC-DC voltage regulation** in synchronous buck converter applications.  
- Uses **voltage-mode control** with **adjustable soft-start** for controlled power-up.  
- Includes **overcurrent protection (OCP)**, **overvoltage protection (OVP)**, and **undervoltage lockout (UVLO)**.  
- Compatible with **N-channel MOSFETs** for high-efficiency power conversion.  

### **Features:**
- **Adjustable Frequency:** Allows optimization for efficiency and component size.  
- **Precision Reference Voltage:** 0.8V ±1% accuracy.  
- **Integrated Bootstrap Diode:** Simplifies high-side MOSFET drive.  
- **Programmable Soft-Start:** Reduces inrush current during startup.  
- **Power Good Indicator:** Monitors output voltage status.  
- **Synchronous Rectification:** Improves efficiency compared to diode-based designs.  

This controller is commonly used in **point-of-load (POL) converters**, **servers**, **telecom equipment**, and **industrial power supplies**.  

(Note: Always refer to the official datasheet for detailed specifications and application guidelines.)

Application Scenarios & Design Considerations

5V or 12V Single-Phase Synchronous Buck Converter PWM Controller withIntegrated MOSFET Gate Drivers

Alternative Part Number

  • TPS5430DDA --: Widely available 3A step-down converter in SOIC-8 PowerPAD, similar input range and function, easy drop-in for many ISL8105A designs.
  • LM2675M-ADJ --: Simple 1A buck regulator in SOIC-8 with adjustable output, comparable switching regulator role and pin-compatible footprint.
  • MC34063ADR2G --: Versatile general-purpose DC-DC controller in SOIC-8, low cost and broadly stocked, usable as a functional substitute with minor external component changes.
  • TPS40170RGYR --: Single-channel synchronous buck controller with similar input range and gate drive, widely available and pin-compatible in function.
  • LM27403SQ --: Synchronous buck controller offering comparable voltage-mode control and current sensing, suitable drop-in functional replacement.
  • NCP81174MNTXG --: Multi-phase buck controller with similar control architecture and driver interface, usable as an alternative with minor layout changes.
  • LM27403SQ/NOPB --: Synchronous buck controller offering comparable voltage-mode control and current-limit features, suitable drop-in functional replacement.

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