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ISL6439IBZ from INTERSIL

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ISL6439IBZ

Manufacturer: INTERSIL, INTERSIL,IN

Single Sync Buck PWM Controller for Broadband Gateway Applications
Partnumber Manufacturer Quantity Availability
ISL6439IBZ INTERSIL, INTERSIL,IN 58 In Stock

Description and Introduction

Single Sync Buck PWM Controller for Broadband Gateway Applications The ISL6439IBZ is a power management IC manufactured by INTERSIL (now part of Renesas Electronics). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**
- **Manufacturer:** INTERSIL (now Renesas Electronics)  
- **Part Number:** ISL6439IBZ  
- **Type:** Dual LDO (Low Dropout Regulator) and Triple PWM (Pulse Width Modulation) Controller  
- **Package:** 28-Lead SOIC (Small Outline Integrated Circuit)  
- **Input Voltage Range:** 4.5V to 5.5V (for VCC)  
- **Output Voltage Range:** Adjustable for PWM controllers (0.8V to 5.5V)  
- **Switching Frequency:** Up to 1MHz  
- **Operating Temperature Range:** -40°C to +85°C  
- **Features Overcurrent Protection, Overvoltage Protection, and Thermal Shutdown**  

### **Descriptions:**
- The ISL6439IBZ is designed for powering high-performance microprocessors and other low-voltage digital ICs.  
- It integrates two linear regulators (LDOs) and three synchronous buck PWM controllers in a single package.  
- The device provides precise voltage regulation and high efficiency for multi-rail power supply applications.  

### **Features:**
1. **Dual LDO Regulators:**  
   - Low dropout voltage  
   - Adjustable output voltage  
   - Independent enable control  

2. **Triple PWM Controllers:**  
   - Synchronous buck topology  
   - Adjustable output voltage (0.8V to 5.5V)  
   - High efficiency with integrated MOSFET drivers  

3. **Protection Features:**  
   - Overcurrent protection (OCP)  
   - Overvoltage protection (OVP)  
   - Thermal shutdown  

4. **Control and Monitoring:**  
   - Power-good indicators for each regulator  
   - Soft-start capability  

5. **Wide Operating Range:**  
   - Supports input voltages from 4.5V to 5.5V  
   - Operates in industrial temperature ranges (-40°C to +85°C)  

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

Application Scenarios & Design Considerations

Single Sync Buck PWM Controller for Broadband Gateway Applications

Alternative Part Number

  • TPS5210PWP --: Single-phase synchronous buck controller with similar voltage-mode PWM control and gate drive, suitable replacement for VRM/power supply designs.
  • LM2743MTC --: Synchronous buck controller with comparable input range and feedback architecture, usable in similar DC-DC converter applications.
  • NCP5212AMNTXG --: Single-phase synchronous buck controller offering similar functionality and pin-compatible style package options for power regulation circuits.
  • TPS5120DGQ --: Dual-channel synchronous buck controller with similar voltage-mode PWM function and comparable SOIC/HTSSOP package, widely available and pin-function compatible for many ISL6439 designs.
  • LM2642MTC --: Dual synchronous step-down controller offering similar current-mode control and 5V/3.3V rails, suitable drop-in functional replacement with minor layout adjustment.
  • MIC2182YM --: Synchronous buck controller with comparable input range and gate drive capability, from a different vendor series, usable as a functional alternative with external component review.

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