MAX6425UK33+T

Basic Information Overview

• Category: Voltage Regulator
• Use: Power management
• Characteristics: Low-dropout, low quiescent current, adjustable output voltage
• Package: SOT23-5
• Essence: Regulates input voltage to a stable output voltage
• Packaging/Quantity: Tape and Reel / 3000 units per reel

Specifications

• Input Voltage Range: 2.5V to 6.5V
• Output Voltage Range: 1.2V to 5.5V
• Dropout Voltage: 120mV at 150mA
• Quiescent Current: 40µA (typical)
• Load Regulation: ±0.05% (typical)
• Line Regulation: ±0.02% (typical)

Detailed Pin Configuration

1. GND: Ground connection
2. FB: Feedback pin for adjusting the output voltage
3. EN: Enable pin for turning the regulator on/off
4. VIN: Input voltage pin
5. VOUT: Output voltage pin

Functional Features

• Low dropout voltage allows for efficient regulation even with small input-output voltage differentials.
• Low quiescent current ensures minimal power consumption during standby or idle modes.
• Adjustable output voltage provides flexibility in various applications.
• Thermal shutdown protection prevents damage due to excessive temperature.

Advantages

• Wide input voltage range enables compatibility with different power sources.
• Small package size (SOT23-5) makes it suitable for space-constrained designs.
• Excellent load and line regulation ensure stable output voltage under varying conditions.
• Low quiescent current prolongs battery life in portable devices.

Disadvantages

• Limited maximum output current may not be suitable for high-power applications.
• Lack of built-in overcurrent protection requires external circuitry for current limiting.

Working Principles

The MAX6425UK33+T is a low-dropout voltage regulator that maintains a stable output voltage regardless of input voltage fluctuations. It operates by comparing the feedback voltage (FB) with an internal reference voltage, adjusting the pass transistor to regulate the output voltage (VOUT). The enable pin (EN) allows for on/off control of the regulator.

Detailed Application Field Plans

• Battery-powered devices: Provides regulated power supply for microcontrollers, sensors, and other low-power components.
• Portable consumer electronics: Suitable for smartphones, tablets, and wearable devices requiring efficient power management.
• Industrial automation: Enables stable voltage supply for control systems, sensors, and actuators.
• Automotive applications: Supports various automotive electronics, such as infotainment systems and engine control units.

Detailed and Complete Alternative Models

1. LM1117-3.3: Low dropout voltage regulator with fixed 3.3V output.
2. LT1763: Adjustable low dropout regulator with ultra-low quiescent current.
3. TPS7A4700: High-current, low-dropout voltage regulator with integrated overcurrent protection.

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