Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller 32-VQFN -40 to 85 The TPS51220RHBR is a synchronous buck controller manufactured by Texas Instruments (TI). Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 4.5V to 28V  
- **Output Voltage Range:** 0.7V to 5.5V  
- **Switching Frequency:** 300kHz to 1.2MHz (adjustable)  
- **Output Current:** Supports up to 20A (with external MOSFETs)  
- **Efficiency:** Up to 95%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 32-VQFN (5mm x 5mm)  

### **Descriptions:**  
The TPS51220RHBR is a high-performance synchronous buck controller designed for high-current, low-voltage applications. It provides precise voltage regulation and supports adaptive on-time control for fast transient response. It is commonly used in point-of-load (POL) power supplies, networking equipment, and industrial applications.  

### **Features:**  
- **Adaptive On-Time Control** for fast transient response  
- **Adjustable Soft-Start** to limit inrush current  
- **Pre-Bias Startup** capability  
- **Power Good (PG) Indicator**  
- **Overcurrent Protection (OCP)**  
- **Overvoltage Protection (OVP)**  
- **Undervoltage Lockout (UVLO)**  
- **Thermal Shutdown Protection**  
- **External Synchronization Support**  

This device is optimized for efficiency and reliability in high-performance power systems.

Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller 32-VQFN -40 to 85