TC1508
High-efficiency 2A synchronous buck converter with wide input voltage range for versatile power supply applications
Product Overview
Description
The TC1508 is a high-efficiency synchronous buck converter capable of delivering up to 2A continuous output current. It features a wide input voltage range of 4.5V to 18V, making it suitable for various power supply applications including industrial, consumer electronics, and automotive systems.
With a fixed switching frequency of 1.5MHz, the TC1508 enables the use of small external inductors and capacitors, reducing overall solution size and cost. The device employs internal compensation, simplifying the design process and reducing external component count.
Comprehensive protection features include cycle-by-cycle current limit, thermal shutdown, and undervoltage lockout. The TC1508 is available in cost-effective SOT-23-6 and SOP-8 packages, making it an excellent choice for price-sensitive applications requiring reliable power conversion.
Product Series
TC
Primary Application
Industrial control systems
Key Features
- High efficiency up to 93%
- Wide input voltage range 4.5V to 18V
- 2A continuous output current
- Internal compensation for easy design
- 1.5MHz switching frequency for small components
- Cycle-by-cycle current limit protection
- Thermal shutdown protection
- Cost-effective package options
Specifications
| Input Voltage | 4.5V - 18V |
|---|---|
| Output Voltage | 0.8V - Vin |
| Output Current | 2A |
| Switching Frequency | 1.5MHz |
| Efficiency | Up to 93% |
| Operating Temperature | -40°C to +85°C |
| Package | SOT-23-6, SOP-8 |
Applications
Industrial control systems
Industrial automation and control
Consumer electronics
Consumer electronics
Set-top boxes
Electronic system design
Network equipment
Communication and interface
LED TV power supplies
Electronic system design
FAE Expert Insights
"The TC1508 is an excellent cost-effective buck converter that I frequently recommend for industrial and consumer applications. The wide 4.5V-18V input range covers most common power supply scenarios, from 5V USB to 12V industrial power. In my experience, the 93% peak efficiency is quite good for this price point, and the 1.5MHz frequency allows for compact designs with small inductors. The internal compensation is a significant advantage for designers without extensive power supply experience - it just works out of the box. One thing I appreciate is the consistent performance across different batches, which is crucial for high-volume production. For applications requiring 2A or less, this converter offers excellent value. I typically recommend adding a small ceramic capacitor close to the input pins for best EMI performance."
Excellent cost-effective 2A buck converter with wide input range and easy design
— Michael Zhang, BeiLuo
Frequently Asked Questions
What is the maximum output current of TC1508?
The TC1508 can deliver up to 2A continuous output current under normal operating conditions. The actual maximum current may be limited by thermal considerations depending on ambient temperature, input voltage, and PCB design. For reliable operation, it is recommended to design with 20-30% current margin below the maximum rating. The device includes cycle-by-cycle current limit protection to prevent damage during overload conditions.
Design for 1.5-1.6A continuous current for reliable operation; ensure adequate PCB copper area for heat dissipation.
What input voltage range does TC1508 support?
TC1508 supports a wide input voltage range of 4.5V to 18V, making it suitable for various power supply applications. This range covers common voltage rails including 5V USB, 12V industrial power, and 15-18V adapter outputs. The wide input range provides design flexibility and allows the same converter to be used across different applications without redesign.
Verify your input voltage falls within 4.5V-18V range; consider voltage transients and tolerances in your design.
What external components are required for TC1508?
TC1508 requires minimal external components: an input capacitor (10-22uF ceramic), an output capacitor (22-47uF ceramic), and an inductor (4.7-10uH depending on output voltage). The internal compensation eliminates the need for external compensation components, simplifying design. Use low-ESR ceramic capacitors with X5R or X7R dielectric for best performance.
Use ceramic capacitors with X7R dielectric; select inductor based on output voltage and current requirements from datasheet recommendations.
How efficient is TC1508?
TC1508 achieves peak efficiency of up to 93% at optimal operating points. Efficiency varies with input voltage, output voltage, and load current. Typical efficiency is 85-90% across most operating conditions. Higher efficiency is achieved at higher output voltages and moderate to heavy loads. The synchronous rectification contributes to high efficiency compared to non-synchronous alternatives.
Calculate power dissipation based on your operating conditions; higher efficiency means less heat generation and longer battery life in portable applications.
What protection features does TC1508 include?
TC1508 includes comprehensive protection features: cycle-by-cycle current limit to protect against output short circuits, thermal shutdown to prevent damage from overheating, and undervoltage lockout (UVLO) to ensure proper startup. These protection features ensure reliable operation and protect both the converter and the system from fault conditions.
All protection features are automatic; no external configuration needed. The device will automatically recover when fault conditions are removed.