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ISL6843IB from INTERISL

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ISL6843IB

Manufacturer: INTERISL, INTERSIL

Improved Industry Standard Single Ended Current Mode PWM Controller

Partnumber Manufacturer Quantity Availability
ISL6843IB INTERISL, INTERSIL 4688 In Stock

Description and Introduction

Improved Industry Standard Single Ended Current Mode PWM Controller The ISL6843IB is a manufacturer part from INTERSIL (now part of Renesas Electronics). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**
- **Manufacturer:** INTERSIL (Renesas Electronics)  
- **Part Number:** ISL6843IB  
- **Type:** Synchronous Buck PWM Controller  
- **Input Voltage Range:** 4.5V to 25V  
- **Output Voltage Range:** Adjustable (0.8V to 5.5V)  
- **Switching Frequency:** 300kHz to 1MHz (adjustable)  
- **Maximum Duty Cycle:** 95%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Lead SOIC  

### **Descriptions:**
The ISL6843IB is a high-performance synchronous buck PWM controller designed for DC-DC voltage regulation applications. It provides precise control for step-down converters with high efficiency and low power dissipation. The device supports adjustable output voltage and switching frequency, making it suitable for various power supply designs.

### **Features:**
- **Wide Input Voltage Range (4.5V to 25V)**  
- **Adjustable Output Voltage (0.8V to 5.5V)**  
- **Programmable Switching Frequency (300kHz to 1MHz)**  
- **High Efficiency Synchronous Operation**  
- **Integrated MOSFET Drivers**  
- **Overcurrent Protection (OCP)**  
- **Undervoltage Lockout (UVLO)**  
- **Thermal Shutdown Protection**  
- **Soft-Start Functionality**  
- **Lead-Free and RoHS Compliant**  

This information is based on the manufacturer's datasheet and technical documentation. For detailed application notes or design considerations, refer to the official datasheet from Renesas Electronics.

Application Scenarios & Design Considerations

Improved Industry Standard Single Ended Current Mode PWM Controller

Alternative Part Number

  • UC3843BD1 --: Industry-standard current-mode PWM controller in the same functional class as the ISL6843, widely available and pin-compatible in most boost/flyback designs.
  • TL3843P --: Equivalent current-mode PWM controller with similar UVLO and duty-cycle behavior, a common drop-in replacement for ISL6843-class parts.
  • SG3843M --: Current-mode PWM controller offering comparable oscillator and output drive characteristics, suitable as a functional substitute for the ISL6843IB.
  • TL3843D --: Pin-compatible current-mode PWM controller in SOIC-8 with comparable oscillator and output stage, widely available and well documented.
  • SG3843BD --: Current-mode PWM controller in SOIC-8 offering similar control loop behavior and gate drive, suitable as a drop-in replacement with minor verification.

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