ISL91127II2AZ-T

Voltage Regulators - DC DC Switching Regulators Overview

The ISL91127II2AZ-T is a high-current buck-boost switching regulator IC from Renesas Electronics Corporation, designed for systems utilizing new battery chemistries. It features synchronous rectification and operates with a fixed output voltage of 1V. The device supports an input voltage range from 1.8V to 5.5V and delivers a continuous output current of 2.1A. It utilizes a 2.5MHz switching frequency and is housed in a compact 20-UFBGA (WLCSP) surface-mount package. The component is rated for operation across a temperature range of -40°C to 85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates synchronous buck-boost topology for efficient power conversion across varying battery states.
• Utilizes a space-saving 20-UFBGA WLCSP package suitable for dense PCB layouts.
• Supports fixed output configuration optimized for specific low-voltage system requirements.

Voltage Regulators - DC DC Switching Regulators Applications

• Portable electronic devices requiring stable power from single-cell lithium-ion batteries
• Systems employing new battery chemistries with variable input voltage ranges
• Space-constrained embedded applications needing high-efficiency DC-DC regulation

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the exact suffix 'II2AZ' against the manufacturer's official datasheet to confirm the specific pinout and thermal characteristics associated with the UFBGA package. Ensure compatibility with the required 1V fixed output specification. Confirm that the 2.1A current rating meets the peak load demands of the target application without exceeding thermal limits within the specified operating temperature range.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1V output is required rather than an adjustable variant. The choice depends on the need for a 2.1A output capability within a 20-pin WLCSP footprint. Consider the 2.5MHz switching frequency for trade-offs between external component size and electromagnetic interference. Validate that the 1.8V to 5.5V input range aligns with the source battery profile.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the ISL91127 family of high-current buck-boost regulators. While other variants like the ISL91127IRAZ-T offer adjustable outputs and different packages such as QFN, the II2AZ variant specifically provides a fixed 1V output in a BGA form factor. This distinction is critical for designs requiring precise voltage levels without external feedback resistor networks.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Cross-reference with the ISL91127 series for functional similarities, but verify package and output configuration differences carefully before substitution.