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ISL6840IUZ from INTERSIL

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ISL6840IUZ

Manufacturer: INTERSIL

Improved industry standard single-ended current mode PWM controller.

Partnumber Manufacturer Quantity Availability
ISL6840IUZ INTERSIL 147 In Stock

Description and Introduction

Improved industry standard single-ended current mode PWM controller. The ISL6840IUZ is a high-performance synchronous buck PWM controller manufactured by INTERSIL (now part of Renesas Electronics). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Input Voltage Range:** 4.5V to 28V  
- **Output Voltage Range:** Adjustable down to 0.6V  
- **Switching Frequency:** 100kHz to 1MHz (adjustable)  
- **Maximum Duty Cycle:** 95%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 16-Lead QFN (Quad Flat No-Lead)  

### **Descriptions:**
- Designed for synchronous buck DC-DC converter applications.  
- Supports voltage-mode control with adjustable compensation.  
- Includes integrated high-side and low-side MOSFET drivers.  
- Features a precision reference voltage (0.6V ±1%).  

### **Features:**
- **Adjustable Soft-Start:** Prevents inrush current during startup.  
- **Programmable Frequency:** Allows optimization for efficiency and component size.  
- **Overcurrent Protection (OCP):** Uses MOSFET RDS(ON) sensing for accurate current limiting.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation under low input voltage conditions.  
- **Power Good Indicator:** Monitors output voltage status.  
- **Synchronous Rectification:** Improves efficiency by reducing conduction losses.  

This controller is commonly used in industrial, telecom, and computing power supply applications.  

(Note: Always refer to the latest datasheet from Renesas for detailed specifications.)

Application Scenarios & Design Considerations

Improved industry standard single-ended current mode PWM controller.

Alternative Part Number

  • UC3843BD1 --: Industry-standard current-mode PWM controller in SOIC-8 with nearly identical control architecture and pinout, widely available and cost-effective.
  • TL3843P --: Equivalent current-mode PWM controller with same functional blocks and 8-pin package, suitable drop-in replacement for most ISL6840 applications.
  • SG3843M --: Current-mode PWM controller from a different series with comparable UVLO thresholds and drive capability, offering a second-source option.
Partnumber Manufacturer Quantity Availability
ISL6840IUZ N/A 330 In Stock

Description and Introduction

Improved industry standard single-ended current mode PWM controller. The ISL6840IUZ is a high-performance synchronous buck PWM controller manufactured by Intersil (now part of Renesas Electronics). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Input Voltage Range:** 4.5V to 28V  
- **Output Voltage Range:** Adjustable down to 0.6V  
- **Switching Frequency:** 300kHz to 1MHz (adjustable)  
- **Maximum Duty Cycle:** 95%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 16-Lead QFN (4mm x 4mm)  

### **Descriptions:**
- The ISL6840IUZ is designed for high-efficiency DC-DC power conversion applications.  
- It supports synchronous rectification for improved efficiency.  
- Features voltage-mode control with adjustable compensation.  
- Includes protection features such as overcurrent, overvoltage, and thermal shutdown.  

### **Features:**
- **Adjustable Frequency:** Allows optimization for efficiency and component size.  
- **Precision Reference Voltage:** 0.6V ±1% accuracy.  
- **Soft-Start Function:** Reduces inrush current during startup.  
- **Synchronous Rectification:** Enhances efficiency by reducing power loss.  
- **Power Good Indicator:** Monitors output voltage status.  
- **Programmable Dead-Time Control:** Optimizes MOSFET switching.  
- **Low Quiescent Current:** Improves light-load efficiency.  

This controller is commonly used in telecom, industrial, and computing power supply applications.

Application Scenarios & Design Considerations

Improved industry standard single-ended current mode PWM controller.

Alternative Part Number

  • UC3843BD1 --: Industry-standard current-mode PWM controller in SOIC-8, functionally similar to the ISL6840 and widely available as a drop-in style replacement.
  • TL3843P --: Current-mode PWM controller with comparable oscillator and drive characteristics, commonly used as a cross-reference for ISL684x series parts.
  • SG3843M --: Current-mode PWM controller in an 8-pin package with similar UVLO and duty-cycle behavior, suitable as a functional substitute.

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