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ISL6401CBZ-T from INTERSIL,IN,Intersil

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ISL6401CBZ-T

Manufacturer: INTERSIL,IN

Synchronizing Current Mode PWM for Subscriber Line Interface Circuits (SLICs)

Partnumber Manufacturer Quantity Availability
ISL6401CBZ-T,ISL6401CBZT INTERSIL,IN 5000 In Stock

Description and Introduction

Synchronizing Current Mode PWM for Subscriber Line Interface Circuits (SLICs) The ISL6401CBZ-T is a step-down DC/DC converter 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 from 0.8V to 5.5V  
- **Output Current:** Up to 4A  
- **Switching Frequency:** 300kHz  
- **Efficiency:** Up to 95%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Lead SOIC  

### **Descriptions:**
- The ISL6401CBZ-T is a synchronous buck (step-down) PWM regulator designed for high-efficiency power conversion.  
- It integrates both high-side and low-side MOSFET drivers, reducing external component count.  
- Features include overcurrent protection, thermal shutdown, and soft-start functionality.  

### **Features:**
- **Synchronous Rectification:** Improves efficiency by reducing power loss.  
- **Adjustable Output Voltage:** Set via an external resistor divider.  
- **Soft-Start:** Limits inrush current during startup.  
- **Overcurrent Protection (OCP):** Safeguards against excessive load currents.  
- **Thermal Shutdown:** Protects the device from overheating.  
- **Low Dropout Operation:** Maintains regulation even when input voltage is close to output.  
- **Wide Input Voltage Range:** Suitable for various applications.  

This device is commonly used in telecom, networking, and industrial power supply applications.  

(Note: Intersil was acquired by Renesas Electronics in 2017.)

Application Scenarios & Design Considerations

Synchronizing Current Mode PWM for Subscriber Line Interface Circuits (SLICs)

Alternative Part Number

  • UC3843BD1R2G --: Industry-standard current-mode PWM controller in SOIC-8, functionally similar to the ISL6401 boost/controller family and widely available as a drop-in style replacement.
  • LM3478MM/NOPB --: Low-side N-channel MOSFET boost controller in MSOP-8, comparable switching-controller function and voltage range, suitable for similar DC-DC converter designs.
  • MC34063ACD-TR --: Versatile general-purpose switching regulator controller in SOIC-8 that can implement boost and inverting topologies, offering a low-cost alternative when exact ISL6401 features are not critical.
Partnumber Manufacturer Quantity Availability
ISL6401CBZ-T,ISL6401CBZT INTERSIL 5000 In Stock

Description and Introduction

Synchronizing Current Mode PWM for Subscriber Line Interface Circuits (SLICs) The ISL6401CBZ-T is a synchronous buck PWM controller manufactured by INTERSIL (now part of Renesas Electronics). Below are its key specifications, descriptions, and features based on factual information:  

### **Specifications:**  
- **Input Voltage Range:** 4.5V to 28V  
- **Output Voltage Range:** Adjustable down to 0.8V  
- **Switching Frequency:** 300kHz (fixed)  
- **Duty Cycle Range:** 0% to 100%  
- **Output Current:** Up to 20A (with external MOSFETs)  
- **Efficiency:** Up to 95%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 10-Lead DFN (3x3mm)  

### **Descriptions:**  
- The ISL6401CBZ-T is a high-performance, synchronous buck PWM controller designed for DC-DC voltage regulation.  
- It features voltage-mode control with an integrated error amplifier and supports high-efficiency power conversion.  
- The device includes overcurrent protection (OCP), undervoltage lockout (UVLO), and thermal shutdown for reliability.  

### **Features:**  
- **Voltage-Mode Control:** Ensures stable output regulation.  
- **Integrated MOSFET Drivers:** Reduces external component count.  
- **Adjustable Soft-Start:** Limits inrush current during startup.  
- **Power Good Indicator:** Monitors output voltage status.  
- **Synchronous Rectification:** Improves efficiency by reducing conduction losses.  
- **Overcurrent Protection (OCP):** Prevents damage during fault conditions.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation under low input voltage.  
- **Thermal Shutdown:** Protects against overheating.  

This information is strictly based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

Synchronizing Current Mode PWM for Subscriber Line Interface Circuits (SLICs)

Alternative Part Number

  • LM3481MM/NOPB --: Widely available boost/flyback controller in the same functional class; different series and pinout, so verify the circuit before substitution.
  • UC3843BD1R2G --: Classic current-mode PWM controller often used as a substitute for ISL6401-type controllers; different naming and package, requiring design review.
  • MC34063ADR2G --: General-purpose DC-DC switching regulator controller that can replace simple ISL6401 applications, but with lower performance and different pinout.

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