Description

The Electronic Component Model 3542-0 is a high efficiency, fixed output voltage of 2.8V, monolithic synchronous buck converter using a constant frequency, current mode architecture. The product operates with a supply current of only 26μA, dropping to less than 1μA in shutdown. The product is ideally suited for single Li-Ion battery-powered applications with an input voltage range of 2.5V to 5.5V. However, 100% duty cycle provides low dropout operation, extending the battery life in portable systems. The internal power switches are optimized to provide high efficiency and eliminate the need for an external Schottky diode.

Specifications and features

- High Efficiency: Up to 96%
- Fixed Output Voltage: 2.8V
- High Peak Switch Current: 1000mA
- Low Output Ripple (<20mVP-P Typical), Burst Mode Operation
- Very Low Quiescent Current: Only 26μA
- Input Voltage Range: 2.5V to 5.5V
- 2.25MHz Constant Frequency Operation
- 1MHz to 3MHz External Frequency Synchronization
- Low Dropout Operation: 100% Duty Cycle
- No Schottky Diode Required
- Internal Soft-Start Limits Inrush Current
- Shutdown Mode Draws Less Than 1μA Supply Current
- Output Voltage Accuracy: ±2%
- Current Mode Operation for Excellent Line and Load Transient Response
- Overtemperature Protected
- Available in 6-Lead 2mm × 2mm DFN

Application Scenarios

- Cellular Telephones
- Wireless and DSL Modems
- Digital Cameras
- MP3 Players
- PDAs and Other Handheld Devices

Comparison

• High efficiency of up to 96% leading to extended battery life.
• Very low Quiescent Current of only 26μAm which drops when in shutdown mode for power saving.
• No need for an external Schottky diode which cuts costs and board size.
• Operates in a fixed output voltage of 2.8V which is ideal for single Li-Ion battery-powered applications with an input voltage range of 2.5V to 5.5V

• Fixed output voltage of 2.8V limits the use of the product to specific applications.