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ST1S09IPUR from ST,ST Microelectronics

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ST1S09IPUR

Manufacturer: ST

Synchronous rectification with inhibit, 2 A, 1.5 MHz adjustable, step-down switching regulator

Partnumber Manufacturer Quantity Availability
ST1S09IPUR ST 5600 In Stock

Description and Introduction

Synchronous rectification with inhibit, 2 A, 1.5 MHz adjustable, step-down switching regulator The ST1S09IPUR is a step-down DC-DC converter manufactured by STMicroelectronics. Below are its key specifications, descriptions, and features:

### **Manufacturer:**  
STMicroelectronics  

### **Specifications:**  
- **Input Voltage Range:** 2.9V to 5.5V  
- **Output Voltage Range:** Adjustable from 0.8V to VIN  
- **Output Current:** Up to 1.5A  
- **Switching Frequency:** 1.5MHz (typical)  
- **Efficiency:** Up to 95%  
- **Dropout Voltage:** 100mV (typical) at 1A  
- **Quiescent Current:** 30µA (typical) in PFM mode  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** DFN6 (3x3mm)  

### **Descriptions:**  
- The ST1S09IPUR is a monolithic synchronous step-down DC-DC converter optimized for portable applications.  
- It integrates a power switch and synchronous rectifier for high efficiency.  
- Features Pulse Frequency Modulation (PFM) for improved efficiency at light loads.  
- Includes over-temperature and over-current protection.  

### **Features:**  
- **High Efficiency:** Up to 95% with synchronous rectification.  
- **Low Dropout Operation:** Maintains regulation even when input voltage is close to output.  
- **Low Quiescent Current:** Improves battery life in portable devices.  
- **Internal Soft-Start:** Reduces inrush current.  
- **Short-Circuit Protection:** Prevents damage during faults.  
- **Thermal Shutdown:** Protects the device from overheating.  
- **Adjustable Output Voltage:** Via external resistor divider.  

This information is sourced from STMicroelectronics' official datasheet.

Application Scenarios & Design Considerations

Synchronous rectification with inhibit, 2 A, 1.5 MHz adjustable, step-down switching regulator
Partnumber Manufacturer Quantity Availability
ST1S09IPUR QFN 1052 In Stock

Description and Introduction

Synchronous rectification with inhibit, 2 A, 1.5 MHz adjustable, step-down switching regulator The ST1S09IPUR is a step-down DC-DC converter manufactured by STMicroelectronics. It comes in a QFN (Quad Flat No-leads) package.  

### **Specifications:**  
- **Input Voltage Range:** 2.7V to 5.5V  
- **Output Voltage Range:** Adjustable from 0.8V to VIN  
- **Output Current:** Up to 1.5A  
- **Switching Frequency:** 1.5MHz (typical)  
- **Efficiency:** Up to 95%  
- **Package Type:** QFN-10 (3x3mm)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Protections:** Overcurrent, Overtemperature, Undervoltage Lockout (UVLO)  

### **Descriptions & Features:**  
- **High Efficiency:** Uses synchronous rectification for improved efficiency.  
- **Low Dropout Operation:** Allows operation with small input-output differentials.  
- **Integrated Power Switches:** Includes both high-side and low-side MOSFETs.  
- **Adjustable Output Voltage:** Set via external resistors.  
- **Soft-Start Function:** Reduces inrush current during startup.  
- **Compact Design:** Suitable for space-constrained applications.  
- **Fixed Frequency PWM Operation:** Ensures stable performance under varying loads.  

This IC is commonly used in portable devices, networking equipment, and point-of-load (POL) applications.

Application Scenarios & Design Considerations

Synchronous rectification with inhibit, 2 A, 1.5 MHz adjustable, step-down switching regulator

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