UCC27324D Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The UCC27324D is a low-side gate driver IC manufactured by Texas Instruments, designed for driving N-Channel and P-Channel MOSFETs in power management applications. This device operates with a supply voltage range of 4.5V to 15V and delivers peak output currents of 4A (source and sink). The UCC27324D is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs or design revisions.

Key Parameters

Parameter	Value
Driven Configuration	Low-Side
Channel Type	Independent
Number of Drivers	2
Gate Type	N-Channel, P-Channel MOSFET
Voltage - Supply	4.5V ~ 15V
Logic Voltage - VIL, VIH	1V, 2V
Current - Peak Output (Source, Sink)	4A, 4A
Input Type	Non-Inverting
Rise / Fall Time (Typ)	20ns, 15ns
Operating Temperature	-55°C ~ 150°C (TJ)
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the UCC27324D is determined by the following critical parameters:

Primary Substitution Criteria:

Driven Configuration: Low-Side
Channel Type: Independent
Number of Drivers: 2
Input Type: Non-Inverting
Package / Case: 8-SOIC form factor
Gate Type: Must support N-Channel and/or P-Channel MOSFET driving

Secondary Compatibility Factors:

Supply voltage range must encompass or exceed 4.5V ~ 15V
Peak output current capability (source and sink) must meet or exceed 4A
Logic voltage thresholds (VIL, VIH) must be compatible with system logic levels
Operating temperature range must cover application requirements
RoHS3 compliance and MSL ratings for manufacturing compatibility

Substitute parts are grouped into two categories: direct replacements (identical electrical and mechanical specifications) and functional equivalents (meeting or exceeding all critical parameters within the same package form factor).

Parameter Comparison

Part Number	Manufacturer	Supply Voltage	Peak Output Current (Source/Sink)	Logic Voltage VIL, VIH	Rise/Fall Time (Typ)	Operating Temp	Package	Product Status
UCC27324D	Texas Instruments	4.5V ~ 15V	4A, 4A	1V, 2V	20ns, 15ns	-55°C ~ 150°C	8-SOIC	Last Time Buy
UCC27324DR	Texas Instruments	4.5V ~ 15V	4A, 4A	1V, 2V	20ns, 15ns	-55°C ~ 150°C	8-SOIC	Active
ADP3654ARDZ-RL	Analog Devices Inc.	4.5V ~ 18V	4A, 4A	0.8V, 2V	10ns, 10ns	-40°C ~ 125°C	8-SOIC-EP	Active
IXDN602SI	Littelfuse	4.5V ~ 35V	2A, 2A	0.8V, 3V	7.5ns, 6.5ns	-55°C ~ 150°C	8-SOIC-EP	Active
IXDN602SIA	IXYS Integrated Circuits Division	4.5V ~ 35V	2A, 2A	0.8V, 3V	7.5ns, 6.5ns	-55°C ~ 150°C	8-SOIC	Active
IXDN602SIATR	IXYS Integrated Circuits Division	4.5V ~ 35V	2A, 2A	0.8V, 3V	7.5ns, 6.5ns	-55°C ~ 150°C	8-SOIC	Active
IXDN602SITR	IXYS Integrated Circuits Division	4.5V ~ 35V	2A, 2A	0.8V, 3V	7.5ns, 6.5ns	-55°C ~ 150°C	8-SOIC-EP	Active
MIC4124YME	Microchip Technology	4.5V ~ 20V	3A, 3A	0.8V, 2.4V	11ns, 11ns	-40°C ~ 125°C	8-SOIC-EP	Active
MIC4124YME-TR	Microchip Technology	4.5V ~ 20V	3A, 3A	0.8V, 2.4V	11ns, 11ns	-40°C ~ 125°C	8-SOIC-EP	Active
MIC4424YM	Microchip Technology	4.5V ~ 18V	3A, 3A	0.8V, 2.4V	28ns, 32ns	-40°C ~ 150°C	8-SOIC	Active
MIC4424YM-TR	Microchip Technology	4.5V ~ 18V	3A, 3A	0.8V, 2.4V	28ns, 32ns	-40°C ~ 150°C	8-SOIC	Active

Engineering Selection Recommendations

Tier 1 - Direct Replacement (Recommended for Immediate Substitution):

UCC27324DR is the primary substitute for UCC27324D. Both devices are manufactured by Texas Instruments and share identical electrical specifications: 4.5V to 15V supply voltage, 4A peak output current (source and sink), 1V/2V logic thresholds, and -55°C to 150°C operating temperature range. The UCC27324DR is in Active product status with significantly higher inventory availability (105,100 units) compared to the Last Time Buy UCC27324D. The only difference is packaging format: UCC27324DR is supplied in Cut Tape (CT) & Digi-Reel format, while UCC27324D is supplied in Tube. Both maintain ROHS3 compliance and MSL Level 1 rating.

Tier 2 - Functional Equivalents (Suitable for Design Revisions):

MIC4424YM and MIC4424YM-TR (Microchip Technology) provide functional equivalence with extended operating temperature range (-40°C to 150°C). These devices maintain the same 8-SOIC package form factor, support N-Channel and P-Channel MOSFET driving, and operate within the 4.5V to 18V supply range. Peak output current is reduced to 3A (source and sink), which is acceptable for applications not requiring the full 4A capability. Rise and fall times are slower (28ns and 32ns respectively) compared to UCC27324D specifications. Both MIC4424 variants are in Active status with substantial inventory.

MIC4124YME and MIC4124YME-TR (Microchip Technology) offer improved switching performance with 11ns rise and fall times and support for 4.5V to 20V supply voltage. Peak output current is 3A. These devices feature 8-SOIC-EP (exposed pad) packaging and are suitable for applications requiring enhanced thermal management. Operating temperature range is -40°C to 125°C.

Tier 3 - Extended Capability Substitutes (For High-Voltage or Wide-Temperature Applications):

IXDN602SIA, IXDN602SIATR, and IXDN602SITR (IXYS Integrated Circuits Division) support extended supply voltage range (4.5V to 35V) and maintain -55°C to 150°C operating temperature coverage. These devices support IGBT, N-Channel, and P-Channel MOSFET driving with faster switching times (7.5ns rise, 6.5ns fall). Peak output current is limited to 2A, which represents a significant reduction from the UCC27324D specification. These parts are suitable only for applications where lower output current is acceptable but extended voltage range is required.

ADP3654ARDZ-RL (Analog Devices Inc.) provides 4.5V to 18V supply voltage with 4A peak output current and improved switching performance (10ns rise and fall times). The device features 8-SOIC-EP packaging with exposed pad for thermal enhancement. Operating temperature range is -40°C to 125°C, which is narrower than UCC27324D. MSL rating is Level 3 (168 hours), requiring controlled storage conditions.

All substitute parts maintain ROHS3 compliance and EAR99 export classification consistent with the original UCC27324D specification.

Frequently Asked Questions (FAQ)

Q: Can UCC27324DR be used as a direct replacement for UCC27324D in existing designs?

A: Yes. UCC27324DR is electrically and functionally identical to UCC27324D. Both devices share the same supply voltage range (4.5V to 15V), peak output current (4A source and sink), logic voltage thresholds (1V/2V), and operating temperature range (-55°C to 150°C). The only difference is packaging format: UCC27324DR is supplied in Cut Tape & Digi-Reel format while UCC27324D is supplied in Tube. No circuit modifications are required.

Q: What is the difference between 8-SOIC and 8-SOIC-EP packages?

A: The 8-SOIC-EP (Exposed Pad) variant includes an additional thermal pad on the bottom of the package, which improves heat dissipation. Both packages maintain the same 0.154" (3.90mm) width and pin configuration. The exposed pad is beneficial for applications with higher power dissipation or thermal constraints. Designs using standard 8-SOIC packages can accommodate 8-SOIC-EP devices without PCB modifications, though the thermal pad should be connected to ground for optimal performance.

Q: Why do some substitute parts have lower peak output current (2A or 3A) compared to UCC27324D (4A)?

A: Peak output current capability is determined by the internal driver stage design and is a fundamental specification of each device. Lower output current does not indicate inferior quality but rather a different design target. Applications requiring 4A peak output current must use devices rated for 4A (UCC27324D, UCC27324DR, or ADP3654ARDZ-RL). Applications with lower current requirements can use 2A or 3A rated devices, which may offer other advantages such as extended voltage range or improved switching speed.

Q: Is MIC4424YM suitable for applications requiring fast switching times?

A: MIC4424YM has rise and fall times of 28ns and 32ns respectively, which are significantly slower than UCC27324D (20ns and 15ns). For applications sensitive to switching speed, MIC4124YME or MIC4124YME-TR are better choices, offering 11ns switching times. For the fastest switching performance among available substitutes, IXDN602 variants provide 7.5ns rise and 6.5ns fall times, though with reduced output current capability.

Q: What are the implications of different operating temperature ranges?

A: UCC27324D operates from -55°C to 150°C (TJ). Substitute parts with narrower ranges (such as -40°C to 125°C) are suitable only for applications within those temperature limits. For designs requiring full -55°C to 150°C coverage, select UCC27324DR, IXDN602 variants, or MIC4424YM. Verify application temperature requirements before selecting a substitute part with a narrower operating range.

Q: Can IXDN602 devices replace UCC27324D in all applications?

A: IXDN602 devices (SI, SIA, SIATR, SITR variants) support extended supply voltage (4.5V to 35V) and maintain the full -55°C to 150°C operating temperature range. However, peak output current is limited to 2A compared to UCC27324D's 4A specification. These devices are suitable only for applications where 2A output current is sufficient. The extended voltage range makes IXDN602 variants valuable for designs requiring operation above 15V.

Q: What is the significance of MSL (Moisture Sensitivity Level) ratings?

A: MSL ratings indicate moisture sensitivity during storage and handling. UCC27324D has MSL Level 1 (Unlimited), meaning no special storage conditions are required. Most substitute parts also have MSL Level 1 or Level 2 (1 Year). ADP3654ARDZ-RL has MSL Level 3 (168 Hours), requiring controlled storage conditions and bake-out procedures before soldering. For high-volume manufacturing, MSL Level 1 or 2 devices are preferred to minimize handling complexity.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance, consistent with UCC27324D. All devices are also REACH Unaffected and classified as EAR99 for export purposes.

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