LTC1535CSW#PBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - Low voltage, high efficiency synchronous step-down DC/DC converter - Wide input voltage range: 2.7V to 6V - Adjustable output voltage range: 0.8V to VIN - Maximum output current: 1.5A - Internal synchronous rectifier for high efficiency - Fixed frequency operation: 1.5MHz - Shutdown current: <1µA - Package: 16-pin SOIC (Small Outline Integrated Circuit) - Essence: Efficient power management solution for various electronic devices - Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 2.7V to 6V
• Output Voltage Range: 0.8V to VIN
• Maximum Output Current: 1.5A
• Switching Frequency: 1.5MHz
• Efficiency: Up to 95%
• Operating Temperature Range: -40°C to 85°C
• Shutdown Current: <1µA
• Package Type: 16-pin SOIC

Detailed Pin Configuration

1. VIN: Input Voltage
2. GND: Ground
3. SW: Switch Node
4. FB: Feedback Voltage
5. SS: Soft-Start
6. SYNC: Synchronization
7. VCC: Supply Voltage
8. PGND: Power Ground
9. AGND: Analog Ground
10. COMP: Compensation
11. EN: Enable
12. BST: Bootstrap
13. LX: Inductor Connection
14. VOUT: Output Voltage
15. VFB: Feedback Voltage
16. PGND: Power Ground

Functional Features

• High efficiency synchronous step-down DC/DC converter
• Wide input voltage range allows compatibility with various power sources
• Adjustable output voltage provides flexibility for different applications
• Internal synchronous rectifier ensures high efficiency operation
• Fixed frequency operation simplifies design considerations
• Low shutdown current minimizes power consumption during standby

Advantages

• High efficiency conversion reduces power dissipation and extends battery life
• Wide input voltage range enables usage in diverse electronic devices
• Adjustable output voltage accommodates different system requirements
• Compact package size saves board space
• Fixed frequency operation simplifies external component selection
• Low shutdown current prolongs battery shelf life

Disadvantages

• Limited maximum output current may not be suitable for high-power applications
• Requires careful consideration of thermal management due to high efficiency operation
• Synchronous rectification may introduce additional complexity in the design

Working Principles

The LTC1535CSW#PBF is a synchronous step-down DC/DC converter that efficiently converts a higher input voltage to a lower output voltage. It utilizes an internal synchronous rectifier to minimize power losses during switching. The converter operates at a fixed frequency of 1.5MHz, ensuring stable and predictable performance. By adjusting the feedback voltage, the output voltage can be set within a wide range, providing flexibility for various applications.

Detailed Application Field Plans

The LTC1535CSW#PBF is commonly used in portable electronic devices, such as smartphones, tablets, and portable media players. Its efficient power management capabilities make it suitable for battery-powered applications where maximizing battery life is crucial. Additionally, it finds application in low-power embedded systems, IoT devices, and portable medical equipment.

Detailed and Complete Alternative Models

• LTC1534CSW#PBF: Similar specifications but with a lower maximum output current of 1A.
• LTC1536CSW#PBF: Higher maximum output current of 2A, suitable for higher power applications.
• LTC1537CSW#PBF: Adjustable output voltage range from 0.6V to VIN, providing more flexibility in voltage selection.

These alternative models offer similar functionality with slight variations in specifications, allowing designers to choose the most suitable option based on their specific requirements.

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