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LM2742MTC from NSC,National Semiconductor

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LM2742MTC

Manufacturer: NSC, NS

N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages
Partnumber Manufacturer Quantity Availability
LM2742MTC NSC, NS 7466 In Stock

Description and Introduction

N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages The LM2742MTC is a high-speed synchronous buck regulator controller manufactured by National Semiconductor (NS).  

**Specifications:**  
- **Input Voltage Range:** 4.5V to 15V  
- **Output Voltage Range:** 0.6V to 5.5V  
- **Switching Frequency:** Adjustable from 50kHz to 1MHz  
- **Maximum Duty Cycle:** 95%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** 16-Lead TSSOP  

**Descriptions:**  
- The LM2742MTC is designed for high-efficiency DC-DC conversion applications.  
- It features a voltage-mode control architecture with adjustable switching frequency.  
- The device includes an integrated high-side MOSFET driver and requires an external low-side MOSFET.  
- It supports pre-biased output startup and has soft-start functionality.  

**Features:**  
- Adjustable output voltage via external resistors  
- Precision 0.6V reference voltage (±1.5% accuracy)  
- Programmable soft-start  
- Power-good output monitor  
- Overcurrent protection with hiccup mode  
- Under-voltage lockout (UVLO)  
- Synchronizable to an external clock  

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

Application Scenarios & Design Considerations

N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages

Alternative Part Number

  • TPS40303DRCR --: TI synchronous buck controller in the same voltage-mode family lineage as the LM2742; similar input range and gate-drive capability, available in a small WSON/VSON package, and TI acquired NSC so support and documentation are aligned.
  • ISL6545CBZ --: Single-phase synchronous buck PWM controller with comparable input voltage range and feedback reference, offered in SOIC/DFN packages; a common drop-in style replacement for LM2742-class controllers in point-of-load designs.
  • MIC2169YMM --: Wide-input synchronous buck controller with similar current-mode control and external MOSFET drive, available in MSOP package; suitable functional substitute when LM2742MTC is unavailable, with minor compensation network retuning.
  • TPS40170RGYR --: Synchronous buck controller with similar voltage-mode control and wide input range; TI is the direct successor to National Semiconductor, so pinout and function are closely compatible.
  • ISL6545IBZ --: Single-phase synchronous buck PWM controller with comparable input voltage range and gate drive capability, suitable as a functional replacement.
  • LTC3851AEMS#PBF --: Wide input range synchronous step-down controller with similar current-mode architecture and external MOSFET drive, usable as an alternative with minor layout changes.

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