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UC2844 from ST,ST Microelectronics

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UC2844

Manufacturer: ST

Linear Current Mode Switching Regulator

Partnumber Manufacturer Quantity Availability
UC2844 ST 3630 In Stock

Description and Introduction

Linear Current Mode Switching Regulator The UC2844 is a high-performance current-mode PWM controller manufactured by STMicroelectronics. Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 8.5V to 30V  
- **Operating Frequency:** Up to 500kHz  
- **Output Current:** ±1A (peak)  
- **Duty Cycle Range:** 0% to 100%  
- **Reference Voltage (Vref):** 5V ±1%  
- **Quiescent Current:** 11mA (typical)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package Options:** PDIP-8, SO-8  

### **Descriptions:**  
- The UC2844 is a fixed-frequency PWM controller optimized for high-performance DC-DC converters.  
- It operates in current-mode control, providing improved loop response and simplified feedback design.  
- Includes features like under-voltage lockout (UVLO), cycle-by-cycle current limiting, and a totem-pole output for driving power MOSFETs.  

### **Features:**  
- **Current-Mode Control:** Enhances line and load regulation.  
- **Under-Voltage Lockout (UVLO):** Ensures proper startup and shutdown.  
- **Programmable Oscillator:** Adjustable frequency via external components.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **Error Amplifier:** High-gain bandwidth for precise regulation.  
- **Pulse-by-Pulse Current Limiting:** Protects against overloads.  
- **Totem-Pole Output:** Directly drives MOSFETs with high current capability.  

The UC2844 is commonly used in power supplies, inverters, and DC-DC converters.  

(Data sourced from STMicroelectronics' official documentation.)

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