ST1S03APUR

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: Low dropout voltage, high efficiency, compact size
• Package: SOP-8 (Small Outline Package)
• Essence: Step-down switching regulator
• Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Input Voltage Range: 2.5V to 18V
• Output Voltage Range: 0.8V to VIN
• Output Current: Up to 3A
• Dropout Voltage: 300mV at 3A
• Switching Frequency: 500kHz
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

1. VIN: Input voltage pin
2. GND: Ground pin
3. FB: Feedback pin for output voltage regulation
4. EN: Enable pin for turning the regulator on/off
5. SS/TR: Soft-start/Tracking pin for controlling start-up time
6. COMP: Compensation pin for stability optimization
7. SW: Switching node pin
8. VOUT: Output voltage pin

Functional Features

• High Efficiency: The ST1S03APUR utilizes a synchronous rectification architecture, resulting in high efficiency even at low input voltages.
• Low Dropout Voltage: With a dropout voltage as low as 300mV, this voltage regulator can maintain a stable output voltage even when the input voltage is close to the desired output voltage.
• Compact Size: The SOP-8 package allows for a compact and space-saving design, making it suitable for applications with limited board space.

Advantages and Disadvantages

Advantages: - High efficiency - Low dropout voltage - Compact size - Wide input voltage range

Disadvantages: - Limited output current capability (up to 3A)

Working Principles

The ST1S03APUR is a step-down switching regulator that converts a higher input voltage to a lower output voltage. It operates by using an internal power MOSFET switch and synchronous rectification to achieve high efficiency. The feedback mechanism ensures that the output voltage remains stable within the specified range.

Detailed Application Field Plans

The ST1S03APUR is commonly used in various applications, including: - Power supplies for industrial equipment - Battery-powered devices - Automotive electronics - Telecommunications equipment - Consumer electronics

Detailed and Complete Alternative Models

• ST1S10: Similar functionality with higher output current capability (up to 5A)
• LM2576: Non-synchronous step-down regulator with adjustable output voltage
• LT1763: Low dropout linear regulator with ultra-low noise performance

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