MAX1909ETI+ - English Editing Encyclopedia Entry

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

Characteristics: - High-efficiency, step-up DC-DC converter - Designed for portable devices and battery-powered applications - Provides a regulated output voltage from a single lithium-ion (Li+) cell or three NiMH/NiCd cells - Offers high efficiency over a wide load range - Compact and low-profile package

Package: 28-pin TQFN (Thin Quad Flat No-Lead) package

Essence: The MAX1909ETI+ is a highly efficient step-up DC-DC converter designed specifically for portable devices and battery-powered applications. It provides a regulated output voltage from a single Li+ cell or three NiMH/NiCd cells.

Packaging/Quantity: The MAX1909ETI+ is available in a 28-pin TQFN package. The quantity may vary depending on the supplier.

Specifications

• Input Voltage Range: 2.5V to 5.5V
• Output Voltage Range: 3.3V to 5.5V
• Maximum Output Current: 600mA
• Switching Frequency: 1.2MHz
• Shutdown Current: <1µA
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX1909ETI+ has a total of 28 pins. Here is the detailed pin configuration:

1. VIN - Input Voltage
2. GND - Ground
3. SW - Switch Node
4. LX - Inductor Connection
5. FB - Feedback Voltage
6. EN - Enable Control
7. SS/TR - Soft-Start/Tracking
8. VCC - Supply Voltage
9. PGND - Power Ground
10. BST - Boost Output
11. VOUT - Output Voltage 12-28. NC - No Connection

Functional Features

1. High Efficiency: The MAX1909ETI+ offers high efficiency over a wide load range, ensuring optimal power conversion and minimal energy loss.
2. Wide Input Voltage Range: It can accept input voltages ranging from 2.5V to 5.5V, making it suitable for various battery configurations.
3. Regulated Output Voltage: The IC provides a regulated output voltage in the range of 3.3V to 5.5V, ensuring stable power supply to connected devices.
4. Compact Package: The 28-pin TQFN package allows for a compact and low-profile design, ideal for space-constrained applications.

Advantages and Disadvantages

Advantages: - High efficiency - Wide input voltage range - Regulated output voltage - Compact package

Disadvantages: - Limited maximum output current (600mA)

Working Principles

The MAX1909ETI+ operates as a step-up DC-DC converter. It uses an internal switch to control the flow of current through an inductor, which stores energy during the switch-on period and releases it to the output during the switch-off period. This process boosts the input voltage to a higher regulated output voltage level.

Detailed Application Field Plans

The MAX1909ETI+ is commonly used in various portable devices and battery-powered applications, including but not limited to: - Smartphones and tablets - Portable media players - Handheld gaming consoles - GPS navigation systems - Wireless communication devices

Detailed and Complete Alternative Models

1. MAX1908ETI+: Similar to MAX1909ETI+, but with a different pin configuration.
2. MAX1910ETI+: Step-up DC-DC converter with higher maximum output current (1A).
3. MAX1710EEG+: Step-up DC-DC converter with integrated battery charger functionality.

These alternative models offer similar features and can be considered as substitutes for the MAX1909ETI+ depending on specific requirements.

In conclusion, the MAX1909ETI+ is a highly efficient step-up DC-DC converter designed for portable devices and battery-powered applications. It offers a regulated output voltage, wide input voltage range, and compact package. While it has a limited maximum output current, there are alternative models available with higher current capabilities.