MAX1672EEE

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: High-efficiency, step-up DC-DC converter
• Package: 16-pin QSOP (Quarter Small Outline Package)
• Essence: Power management solution for portable devices
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 2.5V to 12V
• Output Voltage Range: Adjustable from 2.5V to 28V
• Maximum Output Current: 500mA
• Switching Frequency: 1.2MHz
• Efficiency: Up to 90%
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX1672EEE has a 16-pin QSOP package with the following pin configuration:

1. SHDN: Shutdown Control Input
2. GND: Ground
3. LX: Inductor Connection
4. FB: Feedback Voltage Input
5. VCC: Supply Voltage Input
6. PGND: Power Ground
7. SW: Switch Node
8. SW: Switch Node
9. SW: Switch Node
10. SW: Switch Node
11. SW: Switch Node
12. SW: Switch Node
13. SW: Switch Node
14. SW: Switch Node
15. SW: Switch Node
16. SW: Switch Node

Functional Features

• High efficiency due to synchronous rectification
• Internal compensation simplifies external component count
• Low quiescent current in shutdown mode
• Overcurrent and thermal protection
• Soft-start feature prevents excessive inrush current

Advantages and Disadvantages

Advantages: - High efficiency results in longer battery life - Compact package size suitable for portable devices - Wide input voltage range allows flexibility in power sources - Internal compensation reduces external component count

Disadvantages: - Limited maximum output current of 500mA - Switching frequency may cause interference in sensitive applications

Working Principles

The MAX1672EEE is a step-up DC-DC converter that efficiently boosts the input voltage to a higher output voltage. It utilizes synchronous rectification to minimize power losses and increase overall efficiency. The internal compensation circuitry simplifies the design by reducing the number of external components required.

When enabled, the MAX1672EEE regulates the output voltage by adjusting the duty cycle of the internal switch. It features overcurrent and thermal protection mechanisms to safeguard the device and the connected load. The soft-start feature gradually ramps up the output voltage, preventing excessive inrush current during startup.

Detailed Application Field Plans

The MAX1672EEE is commonly used in various portable electronic devices, including:

1. Battery-powered devices: Provides regulated voltage for microcontrollers, sensors, and other low-power components.
2. Portable audio players: Powers audio amplifiers and digital-to-analog converters (DACs) for high-quality audio output.
3. Handheld communication devices: Supplies stable voltage to RF modules, ensuring reliable wireless communication.
4. Portable medical devices: Enables precise control of voltage-sensitive components in medical equipment.
5. Portable gaming consoles: Supports the power requirements of gaming processors and graphics units.

Detailed and Complete Alternative Models

1. MAX1673: Similar specifications with adjustable output voltage range from 2.5V to 16V.
2. MAX1674: Higher maximum output current of 1A with adjustable output voltage range from 2.5V to 28V.
3. MAX1675: Lower quiescent current in shutdown mode for further power savings.
4. MAX1676: Integrated power-on reset function for improved system reliability.
5. MAX1677: Lower switching frequency to reduce electromagnetic interference.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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