ET82099

Overview

The ET82099 is an ultra-low quiescent current synchronous boost converter designed for battery-powered applications. It features an adjustable output voltage range of 1.8V to 5.5V and delivers a switch current of up to 800mA. The device operates with a junction temperature range of -40°C to 150°C. It supports both Down Mode and Pass-Through operations, maintaining regulation even when input exceeds output. Available in CSP6 and SOT23-6 packages, it utilizes hysteric control topology to maximize efficiency at minimal quiescent currents, typically below 1 microampere.

Feature Summary

• Ultra-low quiescent current operation enhances battery life in light-load conditions
• Adjustable output voltage allows flexibility for various system requirements
• Synchronous rectification ensures high conversion efficiency across load ranges
• Integrated pass-through capability maintains regulation during high-input scenarios

Applications

• Alkaline battery powered devices
• Lithium-ion battery powered products
• Rechargeable lithium battery systems
• Portable consumer electronics requiring extended standby time

Procurement Notes

Verify the specific package variant (CSP6 or SOT23-6) required for your PCB layout before ordering. Confirm that the supplier provides official datasheets from ETEK Microelectronics to ensure component authenticity. Check for any specific ordering suffixes that might indicate tape-and-reel quantities versus cut tape options. Ensure compatibility with your target operating temperature range of -40°C to 150°C.

Selection Notes

Select the ET82099 when ultra-low standby current is critical for extending battery life in portable devices. Choose this part over non-synchronous alternatives if higher efficiency at light loads is required. Consider the available package types based on space constraints. Verify that the adjustable output range meets your specific voltage requirements without needing external resistors outside the standard configuration.

Part Context

ETEK Microelectronics specializes in high-performance analog integrated circuits, including power management and signal chain solutions. The ET82099 belongs to their line of low IQ boost regulators, targeting applications where energy conservation is paramount. This series complements other power management ICs offered by the manufacturer for comprehensive system power solutions.

Replacement Considerations

Check for direct pin-compatible substitutes within the same product family, such as variants with fixed outputs or different current ratings. Ensure any replacement maintains the ultra-low quiescent current specification and synchronous architecture. Verify package compatibility if switching between CSP6 and SOT23-6 footprints.

FAQ

How does the ET82099 handle situations where the input voltage is higher than the output voltage?

The device supports Pass-Through operation, allowing the output to follow the input while maintaining regulation, ensuring stable performance even when the input exceeds the set output voltage.

What control topology is used to achieve low quiescent current?

The ET82099 employs a hysteric control topology, which is specifically designed to maximize efficiency and minimize quiescent current, particularly under light-load conditions.