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TPS51117RGYT from TEXAS

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TPS51117RGYT

Manufacturer: TEXAS, BB/TI

1.8V to 28V Input Sync. Step Down Controller with DCAP? Mode, Optimized for Light Load Efficiency 14-VQFN -40 to 85

Partnumber Manufacturer Quantity Availability
TPS51117RGYT TEXAS, BB/TI 29935 In Stock

Description and Introduction

1.8V to 28V Input Sync. Step Down Controller with DCAP? Mode, Optimized for Light Load Efficiency 14-VQFN -40 to 85 The TPS51117RGYT is a synchronous buck controller manufactured by Texas Instruments (TEXAS). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Input Voltage Range:** 4.5V to 28V  
- **Output Voltage Range:** Adjustable down to 0.8V  
- **Switching Frequency:** 300kHz to 1MHz (adjustable)  
- **Output Current:** Supports up to 20A (with external FETs)  
- **Efficiency:** Up to 95%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 24-pin VQFN (RGY)  

### **Descriptions:**
- The TPS51117RGYT is a high-efficiency synchronous buck controller designed for point-of-load (POL) applications.  
- It integrates gate drivers for external N-channel MOSFETs and supports adaptive on-time control for fast transient response.  
- Suitable for industrial, computing, and telecom applications.  

### **Features:**
- **Adaptive On-Time Control:** Ensures fast transient response.  
- **Adjustable Frequency:** Allows optimization for efficiency or size.  
- **Pre-Biased Output Support:** Prevents negative current during startup.  
- **Power Good Indicator:** Monitors output voltage status.  
- **Soft-Start & Soft-Stop:** Reduces inrush current.  
- **Overcurrent & Overtemperature Protection:** Enhances system reliability.  

This device is commonly used in power supplies for servers, networking equipment, and embedded systems.  

(Source: Texas Instruments Datasheet)

Application Scenarios & Design Considerations

1.8V to 28V Input Sync. Step Down Controller with DCAP? Mode, Optimized for Light Load Efficiency 14-VQFN -40 to 85

Alternative Part Number

  • ISL62771IRTZ --: Single-phase synchronous buck PWM controller with integrated drivers, comparable to the TPS51117 in function and package class.
  • RT8205LZQW --: Dual-channel synchronous buck controller offering similar voltage-mode control and current-sense features for notebook power rails.
  • NCP5212AMNTXG --: Single-phase synchronous buck controller with integrated gate drivers, suitable as a functional substitute in similar DC-DC applications.
  • LM27402SQ --: Synchronous buck controller with similar voltage-mode control and wide input range, suitable replacement in many DC-DC designs.
  • ISL8117AFRZ --: Wide-input synchronous buck controller with comparable current-mode architecture and integrated drivers, good functional cross.
  • LTC3855EUH --: Dual-phase synchronous buck controller offering similar gate drive and feedback features for point-of-load applications.

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