MAX8840ELT45+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: Low Dropout Linear Regulator
• Package: 6-Pin Thin SOT23
• Essence: Voltage Regulator
• Packaging/Quantity: Tape and Reel, 3000 pieces per reel

Specifications

• Input Voltage Range: 2.5V to 5.5V
• Output Voltage Range: 1.8V to 3.3V
• Maximum Output Current: 150mA
• Dropout Voltage: 120mV at 150mA
• Quiescent Current: 40µA
• Line Regulation: ±0.05%/V
• Load Regulation: ±0.15%
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX8840ELT45+T has the following pin configuration:

1. GND: Ground connection
2. IN: Input voltage supply
3. EN: Enable pin for turning the regulator on/off
4. BYP: Bypass capacitor connection
5. FB: Feedback pin for setting the output voltage
6. OUT: Regulated output voltage

Functional Features

• Low dropout voltage allows efficient regulation even with low input-output voltage differentials.
• Low quiescent current ensures minimal power consumption during standby or idle modes.
• Excellent line and load regulation provide stable output voltage under varying conditions.
• Thermal shutdown protection prevents damage due to excessive temperature.
• Short-circuit current limit protects the device from overcurrent conditions.

Advantages and Disadvantages

Advantages: - Low dropout voltage enables efficient power management in battery-powered applications. - Wide input voltage range allows compatibility with various power sources. - Small package size and low external component count make it suitable for space-constrained designs.

Disadvantages: - Limited maximum output current may not be sufficient for high-power applications. - Lack of adjustable output voltage limits flexibility in certain scenarios.

Working Principles

The MAX8840ELT45+T is a low dropout linear regulator that regulates the output voltage by maintaining a constant voltage drop across its internal pass transistor. It operates by comparing the feedback voltage (FB pin) with an internal reference voltage, adjusting the pass transistor to maintain the desired output voltage. The enable pin (EN) controls the on/off state of the regulator.

Detailed Application Field Plans

The MAX8840ELT45+T is commonly used in various battery-powered applications, such as:

1. Portable electronic devices: Smartphones, tablets, portable media players.
2. Wearable devices: Fitness trackers, smartwatches.
3. Wireless communication systems: Bluetooth headsets, wireless earbuds.
4. IoT devices: Sensors, smart home devices.
5. Medical devices: Blood glucose meters, wearable health monitors.

Detailed and Complete Alternative Models

1. MAX8841ELT45+T: Similar specifications but with adjustable output voltage.
2. MAX8842ELT45+T: Higher maximum output current of 300mA.
3. MAX8843ELT45+T: Lower quiescent current of 20µA.

These alternative models provide options based on specific requirements and design considerations.

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