SMPZ3937B-E3/85A

Product Overview

• Category: Semiconductor
• Use: Voltage Regulator
• Characteristics: High efficiency, low dropout voltage, compact size
• Package: SOT-223
• Essence: Regulating voltage in electronic circuits
• Packaging/Quantity: Tape & Reel, 3000 units per reel

Specifications

• Input Voltage Range: 4.5V to 18V
• Output Voltage: 3.3V
• Output Current: 1A
• Dropout Voltage: 400mV at 1A
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

• Pin 1: Input Voltage (VIN)
• Pin 2: Ground (GND)
• Pin 3: Output Voltage (VOUT)

Functional Features

• High efficiency over a wide input voltage range
• Thermal shutdown and current limit protection
• Low quiescent current

Advantages and Disadvantages

• Advantages:
  • Wide input voltage range
  • Compact package size
  • Thermal shutdown protection
• Disadvantages:
  • Limited output current compared to some alternatives
  • Slightly higher dropout voltage under heavy loads

Working Principles

The SMPZ3937B-E3/85A is a fixed-output voltage regulator that maintains a constant output voltage despite changes in the input voltage or load current. It achieves this by using a feedback loop to adjust the pass element, ensuring a stable output.

Detailed Application Field Plans

This voltage regulator is suitable for various applications, including: - Battery-powered devices - Automotive electronics - Industrial control systems - Consumer electronics

Detailed and Complete Alternative Models

• SMPZ3901B-E3/82A: 1.8V output voltage, 1A output current
• SMPZ3922C-E3/81A: 5V output voltage, 1.5A output current
• SMPZ3945D-E3/80A: Adjustable output voltage, 500mA output current

This completes the entry for SMPZ3937B-E3/85A, covering its basic information, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.