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MAX8742EAI from MAX,MAXIM - Dallas Semiconductor

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MAX8742EAI

Manufacturer: MAX, MAXIM

500kHz Multi-Output Power-Supply Controllers with High Impedance in Shutdown

Partnumber Manufacturer Quantity Availability
MAX8742EAI MAX, MAXIM 435 In Stock

Description and Introduction

500kHz Multi-Output Power-Supply Controllers with High Impedance in Shutdown The MAX8742EAI is a power management IC (PMIC) manufactured by Maxim Integrated (now part of Analog Devices). Below are its key specifications, descriptions, and features based on factual data:  

### **Specifications:**  
- **Manufacturer:** Maxim Integrated (now Analog Devices)  
- **Part Number:** MAX8742EAI  
- **Package:** 28-pin SSOP (Shrink Small Outline Package)  
- **Input Voltage Range:** 4.5V to 24V  
- **Output Voltage Range:** Adjustable (via external resistors)  
- **Switching Frequency:** 300kHz (fixed)  
- **Number of Outputs:** Dual (Buck Regulator + Linear Regulator)  
- **Buck Regulator Output Current:** Up to 2A  
- **Linear Regulator Output Current:** Up to 100mA  
- **Operating Temperature Range:** -40°C to +85°C  

### **Descriptions:**  
The MAX8742EAI is a dual-output power-supply controller designed for notebook computers and other portable devices. It integrates a high-efficiency step-down (buck) regulator and a low-dropout (LDO) linear regulator. The buck regulator provides the main system power rail, while the LDO supplies auxiliary power.  

### **Features:**  
- **High-Efficiency Buck Regulator:**  
  - Synchronous rectification for improved efficiency.  
  - Adjustable output voltage (via feedback resistors).  
  - Soft-start for controlled inrush current.  
- **Low-Dropout (LDO) Linear Regulator:**  
  - Fixed or adjustable output voltage (depending on variant).  
  - Low quiescent current for power savings.  
- **Protection Features:**  
  - Overcurrent protection (OCP).  
  - Thermal shutdown.  
  - Undervoltage lockout (UVLO).  
- **Additional Functions:**  
  - Power-good (PG) indicator.  
  - External shutdown control.  

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

Application Scenarios & Design Considerations

500kHz Multi-Output Power-Supply Controllers with High Impedance in Shutdown

Alternative Part Number

  • TPS51125RGER --: Dual synchronous buck controller with similar function and pin-compatible layout, widely used as a drop-in alternative for notebook power rails.
  • ISL6237IRZ --: Dual-channel step-down controller offering comparable output capability and control scheme, suitable replacement in similar applications.
  • RT8205LZQW --: Dual synchronous buck controller with similar voltage range and current handling, commonly used as a cost-effective substitute.
  • TPS51124RGER --: Dual synchronous buck controller with similar dual-output PWM architecture and SSOP/QFN footprint, widely available and often used as a Maxim replacement.
  • RT8209BGQW --: Dual synchronous buck controller in a small package with similar voltage-mode control and protection features, a cost-effective alternative for the same power-supply role.

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