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TPS51220RHBT from TI,Texas Instruments

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TPS51220RHBT

Manufacturer: TI, BB/TI

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

Partnumber Manufacturer Quantity Availability
TPS51220RHBT TI, BB/TI 57137 In Stock

Description and Introduction

Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller 32-VQFN -40 to 85 The TPS51220RHBT is a synchronous buck controller manufactured by Texas Instruments (TI). Here are its key specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 4.5V to 28V  
- **Output Voltage Range:** 0.7V to 5.5V (adjustable)  
- **Switching Frequency:** 300kHz to 1MHz (adjustable)  
- **Output Current:** Supports up to 20A (with external MOSFETs)  
- **Efficiency:** Up to 95%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 32-pin VQFN (RHBT)  

### **Descriptions:**  
The TPS51220RHBT is a high-performance synchronous buck controller designed for high-current, low-voltage applications. It provides precise voltage regulation and supports high-efficiency power conversion. The device integrates gate drivers for external N-channel MOSFETs and includes features for power sequencing, protection, and thermal management.  

### **Features:**  
- **Adjustable Output Voltage:** Supports a wide range via external resistor divider.  
- **Adjustable Switching Frequency:** Can be set between 300kHz and 1MHz.  
- **Integrated Gate Drivers:** Reduces external component count.  
- **Power Good Indicator:** Monitors output voltage status.  
- **Soft-Start & Tracking:** Prevents inrush current and supports sequencing.  
- **Protection Features:** Includes overcurrent, overvoltage, undervoltage lockout (UVLO), and thermal shutdown.  
- **Synchronous Rectification:** Improves efficiency by reducing conduction losses.  

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

Application Scenarios & Design Considerations

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

Alternative Part Number

  • ISL95812HRZ --: Dual-phase PWM controller for CPU/GPU core power with similar VR12/VR13 functionality and QFN package, a common cross for the TPS51220.
  • NCP81174MNTXG --: Multi-phase buck controller with comparable PWM control and current-sense features, suitable as a functional substitute in notebook power designs.
  • RT8816AGQW --: Dual-channel synchronous buck PWM controller offering similar voltage-mode control and protection features in a compact package.
  • LM26420Q1MHX/NOPB --: Dual-channel synchronous buck controller with similar input range and current-mode control, suitable for the same multi-rail power designs.
  • ISL6237IRZ --: Dual synchronous buck controller covering comparable input voltage and output current, commonly used as a functional substitute in notebook power rails.
  • MAX17020ETJ+ --: Dual-output step-down controller with similar topology and voltage range, offering an alternative source for the same application.

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