LTC3126MPFE

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High efficiency synchronous buck-boost DC/DC converter - Wide input voltage range: 2.7V to 15V - Output voltage can be set between 1.8V and 15V - Maximum output current: 1.5A - Adjustable frequency: 400kHz to 2.2MHz - Low quiescent current: 50µA - Burst Mode® operation for improved efficiency at light loads - Soft-start and tracking functionality - Overcurrent and overtemperature protection - Small package size: 3mm x 4mm DFN-12

Packaging/Quantity: The LTC3126MPFE is available in a 12-pin DFN (Dual Flat No-Lead) package. It is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 2.7V to 15V
• Output Voltage Range: 1.8V to 15V
• Maximum Output Current: 1.5A
• Switching Frequency Range: 400kHz to 2.2MHz
• Quiescent Current: 50µA
• Operating Temperature Range: -40°C to 125°C
• Package Type: 12-pin DFN

Detailed Pin Configuration

The LTC3126MPFE has the following pin configuration:

1. VIN: Input voltage pin
2. SW: Switching node connection
3. GND: Ground reference
4. FB: Feedback voltage pin
5. SS/TRK: Soft-start/tracking control pin
6. VOUT: Output voltage pin
7. PGND: Power ground reference
8. EN: Enable pin
9. MODE: Mode selection pin
10. VCC: Internal regulator output voltage pin
11. BST: Boost capacitor connection
12. PGND: Power ground reference

Functional Features

• High efficiency buck-boost conversion for wide input and output voltage range
• Adjustable switching frequency for optimization of efficiency and component size
• Soft-start and tracking functionality for controlled startup and voltage tracking applications
• Overcurrent and overtemperature protection for enhanced reliability and safety
• Burst Mode® operation for improved efficiency at light loads

Advantages and Disadvantages

Advantages: - Wide input voltage range allows for versatile applications - High efficiency operation reduces power loss and extends battery life - Small package size enables compact designs - Overcurrent and overtemperature protection enhance system reliability

Disadvantages: - Limited maximum output current may not be suitable for high-power applications - Requires careful consideration of component selection and layout due to high-frequency switching

Working Principles

The LTC3126MPFE is a synchronous buck-boost DC/DC converter that utilizes high-frequency switching to efficiently convert input voltage to a regulated output voltage. It can step up or step down the input voltage, making it suitable for a wide range of applications.

The converter operates by controlling the duty cycle of the internal switches to regulate the output voltage. The switching frequency can be adjusted to optimize efficiency and component size. The soft-start and tracking functionality ensure controlled startup and voltage tracking in various applications.

The device also incorporates overcurrent and overtemperature protection mechanisms to safeguard against faults and ensure reliable operation.

Detailed Application Field Plans

The LTC3126MPFE is commonly used in various applications, including but not limited to: - Battery-powered devices - Portable electronics - Industrial equipment - Automotive systems - Distributed power supplies

Its ability to operate from a wide input voltage range and provide a regulated output voltage makes it suitable for diverse applications where efficient power management is required.

Detailed and Complete Alternative Models

Some alternative models to the LTC3126MPFE include: - LTC3126MSE: Similar specifications but in a different package (MSOP-12) - LTC3126IFE: Lower maximum output current (1A) but in a smaller package (3mm x 3mm DFN-10) - LTC3126HFE: Higher maximum output current (2.5A) but in a larger package (4mm x 4mm DFN-16)

These alternative models offer different trade-offs in terms of package size, maximum output current, and pin configuration, allowing designers to choose the most suitable option for their specific application requirements.

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