TPS61121PW

Overview

Category: Integrated Circuit (IC)

Use: Voltage Boost Converter

Characteristics: - High efficiency - Wide input voltage range - Adjustable output voltage - Low quiescent current - Over-temperature protection

Package: PowerPAD MSOP-8

Essence: The TPS61121PW is a high-efficiency boost converter IC designed to provide a regulated output voltage from a wide input voltage range.

Packaging/Quantity: The TPS61121PW is available in a PowerPAD MSOP-8 package. It is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 2.7V to 18V
• Output Voltage Range: 4V to 28V
• Switching Frequency: 1.2MHz
• Quiescent Current: 60µA
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The TPS61121PW has the following pin configuration:

1. EN (Enable): Enable control pin for turning the device on/off.
2. FB (Feedback): Feedback pin for adjusting the output voltage.
3. VIN (Input Voltage): Input voltage supply pin.
4. SW (Switch Node): Switch node connection for the internal power switch.
5. PGND (Power Ground): Power ground connection.
6. AGND (Analog Ground): Analog ground connection.
7. VOUT (Output Voltage): Regulated output voltage pin.
8. LX (Inductor Connection): Inductor connection for the boost converter.

Functional Features

• High Efficiency: The TPS61121PW offers high conversion efficiency, minimizing power losses.
• Wide Input Voltage Range: It can accept input voltages ranging from 2.7V to 18V, making it suitable for various applications.
• Adjustable Output Voltage: The output voltage can be adjusted within the range of 4V to 28V, providing flexibility.
• Low Quiescent Current: The IC has a low quiescent current of only 60µA, reducing power consumption.
• Over-Temperature Protection: It incorporates over-temperature protection to prevent damage during high-temperature conditions.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power consumption. - Wide input voltage range allows for versatile use. - Adjustable output voltage provides flexibility. - Low quiescent current minimizes power losses. - Over-temperature protection ensures device safety.

Disadvantages: - Limited output voltage range compared to some other boost converters. - Relatively small package size may require careful handling during assembly.

Working Principles

The TPS61121PW operates as a boost converter, converting a lower input voltage to a higher regulated output voltage. It utilizes an internal power switch and control circuitry to efficiently step up the input voltage. The feedback pin (FB) is used to adjust the output voltage by controlling the duty cycle of the internal switch. The enable pin (EN) allows for on/off control of the device.

Detailed Application Field Plans

The TPS61121PW is commonly used in various applications, including:

1. Battery-powered devices: It can be used to boost the battery voltage to power components requiring higher voltages.
2. LED backlighting: The IC is suitable for driving LED backlights in displays, providing efficient and adjustable voltage conversion.
3. Portable audio devices: It can be utilized to power audio amplifiers or other components in portable audio systems.
4. Industrial equipment: The TPS61121PW finds application in industrial equipment that requires voltage boosting capabilities.

Detailed and Complete Alternative Models

Some alternative models to the TPS61121PW include:

1. TPS61122PW: Similar to the TPS61121PW, but with a higher switching frequency of 2.4MHz.
2. TPS61123PW: A variant with an extended input voltage range of 2.7V to 24V.
3. TPS61124PW: Offers a wider output voltage range of 4V to 36V.

These alternative models provide options for different requirements in terms of switching frequency, input voltage range, and output voltage range.

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