ISL85005FRZ-TK

Voltage Regulators - DC DC Switching Regulators Overview

The ISL85005FRZ-TK is a synchronous buck regulator from the Renesas ISL85005 series, packaged in a 12-lead DFN (3x4 mm) with an exposed pad. It integrates high-side and low-side FETs to deliver up to 5 A of output current. The device operates with an input voltage range of 4.5 V to 18 V and supports adjustable output voltages between 4.3 V and 5.5 V. It utilizes current-mode control with an internal oscillator fixed at a switching frequency of 500 kHz. Key electrical parameters include a maximum operating temperature of +125°C, a minimum of -40°C, and a quiescent supply current of 6 µA.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates high-side and low-side power FETs for compact synchronous buck design
• Supports external synchronization via a dedicated SYNC pin
• Operates in forced continuous conduction mode for stable performance under light loads

Voltage Regulators - DC DC Switching Regulators Applications

• Load point regulators in embedded computing systems
• Power supplies for network and communication equipment
• Voltage regulation for multifunction printers

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix TK indicates tape-and-reel packaging containing 1000 units per reel. Confirm the component matches the 12-lead DFN 3x4 mm package dimensions. Ensure compatibility with the intended input voltage range of 4.5 V to 18 V. Check that the required output voltage falls within the supported 4.3 V to 5.5 V adjustment range. Validate thermal management requirements for operation up to +125°C junction temperature.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 500 kHz switching frequency is required without external resistor programming. Choose this part over the ISL85005A variant if diode emulation mode is not needed, as the FRZ version operates exclusively in forced CCM. Consider the integrated SYNC pin capability if system-wide clock synchronization is necessary. Evaluate the 6 µA quiescent current against standby power constraints. Verify that the 12-lead DFN package fits the available PCB footprint.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the ISL85005 family of high-efficiency synchronous buck regulators designed by Renesas Electronics Corporation. The family targets applications requiring wide input voltage ranges and moderate output currents. The FRZ suffix typically denotes a standard commercial grade device in a leaded-free package. Related development tools include the ISL85005EVAL1Z evaluation board for circuit validation.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The ISL85005AFRZ is a compatible alternative within the same series, differing primarily in operational mode support. Both share identical pinouts and electrical specifications except for the ISL85005A's ability to operate in diode emulation mode.