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MAX1858EEG from T32D

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MAX1858EEG

Manufacturer: T32D, MAXIM

Dual 180 Out-of-Phase PWM Step-Down Controller with Power Sequencing and POR

Partnumber Manufacturer Quantity Availability
MAX1858EEG T32D, MAXIM 1067 In Stock

Description and Introduction

Dual 180 Out-of-Phase PWM Step-Down Controller with Power Sequencing and POR The MAX1858EEG+T is a step-up DC-DC converter from Maxim Integrated (now part of Analog Devices). Here are its key specifications, descriptions, and features:

### **Specifications:**
- **Input Voltage Range:** 0.7V to 5.5V  
- **Output Voltage:** Adjustable from 1.8V to 5.5V  
- **Output Current:** Up to 300mA (depending on input/output conditions)  
- **Switching Frequency:** 500kHz  
- **Efficiency:** Up to 90%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 24-pin QSOP  

### **Descriptions:**
The MAX1858EEG+T is a high-efficiency, low-voltage, step-up DC-DC converter designed for battery-powered applications. It integrates a synchronous rectifier for improved efficiency and is optimized for low-input-voltage operation, making it suitable for single-cell or dual-cell alkaline/NiMH battery systems.

### **Features:**
- **True Low-Voltage Operation:** Starts up with inputs as low as 0.7V.  
- **Synchronous Rectification:** Improves efficiency and eliminates the need for an external Schottky diode.  
- **Adjustable Output Voltage:** Set via an external resistor divider.  
- **Low Quiescent Current:** 25µA (typical) for improved battery life.  
- **Internal Soft-Start:** Reduces inrush current during startup.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation under low-input conditions.  
- **Thermal Shutdown Protection:** Prevents damage from excessive heat.  

This device is commonly used in portable electronics, medical devices, and other low-power applications requiring efficient voltage conversion.

Application Scenarios & Design Considerations

Dual 180 Out-of-Phase PWM Step-Down Controller with Power Sequencing and POR

Alternative Part Number

  • LTC3851EGN --: Synchronous step-down switching regulator controller with similar input range and function, suitable as a functional replacement in DC-DC converter designs.
  • TPS40170RGYR --: Wide-input synchronous buck controller offering comparable control and protection features, usable as an alternative with minor layout adjustments.
  • ISL6545IBZ --: Single-phase synchronous buck PWM controller with similar operating characteristics, providing a viable cross-reference option.
  • LTC3855EUH --: Dual-channel synchronous step-down controller with similar function and package options; well-established alternative to the MAX1858.
  • TPS40305DRCR --: Wide-input synchronous buck controller offering comparable regulation performance and easy drop-in evaluation for MAX1858 designs.
  • ISL6545AIRZ --: Single-phase synchronous buck PWM controller with similar voltage-mode control and compact package, suitable as a functional substitute.

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