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ISL6843IB from INTERISL

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ISL6843IB

Manufacturer: INTERISL

Improved Industry Standard Single Ended Current Mode PWM Controller

Partnumber Manufacturer Quantity Availability
ISL6843IB INTERISL 8 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.
Partnumber Manufacturer Quantity Availability
ISL6843IB INTERSIL 4680 In Stock

Description and Introduction

Improved Industry Standard Single Ended Current Mode PWM Controller The ISL6843IB 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 14V  
- **Output Voltage Range:** Adjustable down to 0.6V  
- **Switching Frequency:** Adjustable from 100kHz to 1MHz  
- **Maximum Duty Cycle:** Up to 100%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 16-Lead QFN (Quad Flat No-Lead)  

### **Descriptions:**  
- Designed for high-efficiency synchronous buck DC/DC converters.  
- Supports both voltage-mode and current-mode control.  
- Features adaptive dead-time control to improve efficiency.  
- Includes integrated MOSFET drivers for N-channel power MOSFETs.  

### **Features:**  
- **Precision Reference Voltage:** 0.6V ±1%  
- **Programmable Soft-Start**  
- **Overcurrent Protection (OCP)**  
- **Overvoltage Protection (OVP)**  
- **Undervoltage Lockout (UVLO)**  
- **Synchronizable to External Clock**  
- **Low Quiescent Current:** Typically 2.5mA  

This controller is commonly used in point-of-load (POL) regulators, telecom, and industrial applications.  

(Note: Always refer to the latest datasheet for updated 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, functionally equivalent to the ISL6843 with similar UVLO thresholds and drive capability.
  • 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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