ISL8120IRZ Equivalent & Substitute Parts

Part Overview

The ISL8120IRZ is a buck regulator positive output step-down DC-DC controller IC manufactured by Renesas Electronics Corporation. This power management IC operates as a transistor driver for step-down topology applications with dual output phases. The device is currently in active product status with 2072 units in stock inventory. Finding equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and accommodate alternative sourcing requirements while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Manufacturer	Renesas Electronics Corporation
Part Number	ISL8120IRZ
Category	Power Management (PMIC)
Function	Step-Down Buck Regulator Controller
Output Type	Transistor Driver
Number of Outputs	2
Output Phases	2
Voltage Supply Range (Vcc/Vdd)	3V ~ 5.6V
Switching Frequency	150kHz ~ 1.5MHz
Maximum Duty Cycle	90%
Synchronous Rectifier	Yes
Clock Sync	Yes
Control Features	Current Limit, Enable, Power Good
Operating Temperature Range	-40°C ~ 85°C (TA)
Package Type	32-VFQFN Exposed Pad (5x5)
Mounting Type	Surface Mount
Product Status	Active
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitute parts for the ISL8120IRZ are determined by strict equivalence across the following critical parameters:

Identical output topology (buck step-down)
Matching output configuration (positive)
Equivalent number of outputs and phases (2 outputs, 2 phases)
Compatible voltage supply range (3V ~ 5.6V)
Overlapping switching frequency capability (150kHz ~ 1.5MHz)
Identical maximum duty cycle (90%)
Presence of synchronous rectifier and clock sync functionality
Compatible control features (Current Limit, Enable, Power Good as minimum)
Identical operating temperature range (-40°C ~ 85°C)
Same package type (32-VFQFN Exposed Pad, 5x5)
Surface mount mounting type
Active product status
ROHS3 compliance

The ISL8126IRZ meets all these criteria and qualifies as a parametric equivalent substitute for the ISL8120IRZ.

Parameter Comparison

Parameter	ISL8120IRZ	ISL8126IRZ	Match Status
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation	Identical
Category	Power Management (PMIC)	Power Management (PMIC)	Identical
Function	Step-Down Buck Regulator Controller	Step-Down Buck Regulator Controller	Identical
Output Type	Transistor Driver	Transistor Driver	Identical
Number of Outputs	2	2	Identical
Output Phases	2	2	Identical
Voltage Supply Range (Vcc/Vdd)	3V ~ 5.6V	3V ~ 5.6V	Identical
Switching Frequency	150kHz ~ 1.5MHz	150kHz ~ 1.5MHz	Identical
Maximum Duty Cycle	90%	90%	Identical
Synchronous Rectifier	Yes	Yes	Identical
Clock Sync	Yes	Yes	Identical
Control Features	Current Limit, Enable, Power Good	Current Limit, Enable, Frequency Control, Power Good	Compatible
Operating Temperature Range	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	Identical
Package Type	32-VFQFN Exposed Pad (5x5)	32-VFQFN Exposed Pad (5x5)	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Product Status	Active	Active	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	Identical

Engineering Selection Recommendations

The ISL8126IRZ is a direct parametric equivalent to the ISL8120IRZ. Both devices are manufactured by Renesas Electronics Corporation and maintain identical electrical specifications across all critical parameters including supply voltage, switching frequency, duty cycle, output configuration, and thermal operating range. Both parts are ROHS3 compliant and carry identical moisture sensitivity ratings.

The ISL8126IRZ includes an additional Frequency Control feature in its control feature set, which represents an enhancement over the ISL8120IRZ baseline functionality. This additional capability does not compromise compatibility and may provide additional design flexibility in frequency management applications.

Both parts are in active product status with current inventory availability. The identical 32-VFQFN package with exposed pad ensures mechanical and thermal compatibility in PCB layouts designed for either device.

Frequently Asked Questions (FAQ)

Q: Can the ISL8126IRZ be used as a direct replacement for the ISL8120IRZ in existing designs?

A: Yes. The ISL8126IRZ meets all parametric equivalence criteria for the ISL8120IRZ. Identical supply voltage range, switching frequency capability, duty cycle, output phases, package type, and operating temperature range ensure functional compatibility. The additional Frequency Control feature in the ISL8126IRZ does not create incompatibility.

Q: Are there any package or pinout differences between these parts?

A: No. Both the ISL8120IRZ and ISL8126IRZ use the identical 32-VFQFN Exposed Pad package in 5x5 configuration. Pinout compatibility is assured for direct PCB substitution.

Q: What is the significance of the Frequency Control feature present in the ISL8126IRZ but not listed for the ISL8120IRZ?

A: The ISL8126IRZ includes Frequency Control as an additional control feature. This represents enhanced functionality that does not affect baseline compatibility. Designs utilizing only the standard control features (Current Limit, Enable, Power Good) will operate identically with either part.

Q: Are both parts compliant with the same regulatory standards?

A: Yes. Both the ISL8120IRZ and ISL8126IRZ are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity ratings of MSL 3 (168 Hours). Both parts are classified under ECCN EAR99 and HTSUS 8542.39.0001.

Q: What is the current inventory status for these substitute parts?

A: The ISL8120IRZ has 2072 units in stock. The ISL8126IRZ has 1423 units in stock. Both are available as new original components.

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