UCC37324D Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The UCC37324D is a low-side gate driver IC manufactured by Texas Instruments, designed for driving N-Channel and P-Channel MOSFETs in 8-SOIC packaging. This device operates with a supply voltage range of 4.5V to 15V and delivers peak output currents of 4A (source and sink). The UCC37324D is currently in Last Time Buy status, indicating end-of-life production. Identifying qualified substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs and long-term support.

Key Parameters

Parameter	UCC37324D 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 UCC37324D 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: Substitute must accommodate the 4.5V minimum and ideally support 15V or higher
Peak Output Current: Substitute must deliver at least 4A source and sink capability
Operating Temperature Range: Substitute must cover -55°C to 150°C or equivalent industrial range
Logic Voltage Thresholds: VIL and VIH must be compatible with system logic levels
RoHS and MSL Compliance: All substitutes must maintain ROHS3 compliance and acceptable moisture sensitivity

Substitutes are grouped by their ability to meet these criteria while maintaining functional equivalence in low-side gate driving applications.

Parameter Comparison

Part Number	Manufacturer	Supply Voltage	Peak Output Current (Source/Sink)	Rise/Fall Time (Typ)	Operating Temp	Gate Type Support	Package	Product Status
UCC37324D	Texas Instruments	4.5V ~ 15V	4A / 4A	20ns / 15ns	-55°C ~ 150°C	N-Channel, P-Channel MOSFET	8-SOIC	Last Time Buy
UCC27324DR	Texas Instruments	4.5V ~ 15V	4A / 4A	20ns / 15ns	-55°C ~ 150°C	N-Channel, P-Channel MOSFET	8-SOIC	Active
ADP3654ARDZ-RL	Analog Devices Inc.	4.5V ~ 18V	4A / 4A	10ns / 10ns	-40°C ~ 125°C	N-Channel MOSFET	8-SOIC-EP	Active
IXDN602SI	Littelfuse	4.5V ~ 35V	2A / 2A	7.5ns / 6.5ns	-55°C ~ 150°C	IGBT, N-Channel, P-Channel MOSFET	8-SOIC-EP	Active
IXDN602SIA	IXYS Integrated Circuits Division	4.5V ~ 35V	2A / 2A	7.5ns / 6.5ns	-55°C ~ 150°C	IGBT, N-Channel, P-Channel MOSFET	8-SOIC	Active
IXDN602SIATR	IXYS Integrated Circuits Division	4.5V ~ 35V	2A / 2A	7.5ns / 6.5ns	-55°C ~ 150°C	IGBT, N-Channel, P-Channel MOSFET	8-SOIC	Active
IXDN602SITR	IXYS Integrated Circuits Division	4.5V ~ 35V	2A / 2A	7.5ns / 6.5ns	-55°C ~ 150°C	IGBT, N-Channel, P-Channel MOSFET	8-SOIC-EP	Active
MIC4124YME	Microchip Technology	4.5V ~ 20V	3A / 3A	11ns / 11ns	-40°C ~ 125°C	N-Channel, P-Channel MOSFET	8-SOIC-EP	Active
MIC4124YME-TR	Microchip Technology	4.5V ~ 20V	3A / 3A	11ns / 11ns	-40°C ~ 125°C	N-Channel, P-Channel MOSFET	8-SOIC-EP	Active
MIC4424YM	Microchip Technology	4.5V ~ 18V	3A / 3A	28ns / 32ns	-40°C ~ 150°C	N-Channel, P-Channel MOSFET	8-SOIC	Active
MIC4424YM-TR	Microchip Technology	4.5V ~ 18V	3A / 3A	28ns / 32ns	-40°C ~ 150°C	N-Channel, P-Channel MOSFET	8-SOIC	Active

Engineering Selection Recommendations

Tier 1 - Direct Replacement (Recommended): UCC27324DR is the primary substitute. Manufactured by Texas Instruments, it maintains identical electrical specifications to the UCC37324D (4A output current, 4.5V–15V supply, -55°C to 150°C operating range) while offering Active product status and improved availability. This part requires no design modifications and provides the highest compatibility assurance.

Tier 2 - Compatible Substitutes (Acceptable with Design Review): MIC4424YM and MIC4424YM-TR (Microchip Technology) are functionally compatible low-side gate drivers with 3A output current capability and extended temperature range to 150°C. These parts support the same gate types and 8-SOIC packaging. The reduced peak output current (3A vs. 4A) requires confirmation that application requirements do not demand the full 4A specification. Both parts maintain ROHS3 compliance and MSL-1 rating.

MIC4124YME and MIC4124YME-TR (Microchip Technology) offer 3A output current with faster rise/fall times (11ns) and higher supply voltage tolerance (4.5V–20V). Operating temperature range is limited to -40°C to 125°C, which may not satisfy applications requiring the full -55°C to 150°C range of the original part.

Tier 3 - Conditional Substitutes (Application-Dependent): IXDN602 variants (IXDN602SI, IXDN602SIA, IXDN602SIATR, IXDN602SITR) from IXYS Integrated Circuits Division provide extended supply voltage range (4.5V–35V) and support IGBT driving in addition to MOSFET types. However, peak output current is reduced to 2A, which represents a significant limitation compared to the UCC37324D's 4A specification. These parts are suitable only for applications where 2A output current is sufficient. All variants maintain -55°C to 150°C operating range and ROHS3 compliance.

ADP3654ARDZ-RL (Analog Devices Inc.) delivers 4A output current with superior rise/fall times (10ns) and extended supply voltage range (4.5V–18V). The operating temperature range is restricted to -40°C to 125°C, and gate type support is limited to N-Channel MOSFET only, excluding P-Channel capability. This part is suitable for applications operating within the narrower temperature range and requiring only N-Channel MOSFET driving.

Compliance and Certification: All recommended substitutes maintain ROHS3 compliance and EAR99 export classification. Moisture sensitivity levels range from MSL-1 (unlimited) to MSL-3 (168 hours), with MSL-1 and MSL-2 parts preferred for standard manufacturing environments.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with lower peak output current (2A vs. 4A)? A: Substitution with reduced output current is permissible only if your application circuit design does not require the full 4A specification. The IXDN602 series (2A output) must be evaluated against actual gate charge requirements and switching frequency. Consult device datasheets to confirm adequate drive capability for your specific MOSFET or IGBT gate capacitance.

Q: What is the difference between 8-SOIC and 8-SOIC-EP packaging? A: The 8-SOIC-EP variant includes an exposed pad (EP) on the underside of the package for enhanced thermal dissipation. Both packages are mechanically compatible with standard 8-SOIC PCB footprints, though the exposed pad variant may provide improved thermal performance in high-frequency switching applications. Consult PCB layout guidelines for proper thermal via placement if using EP variants.

Q: Is UCC27324DR a direct pin-for-pin replacement? A: Yes. UCC27324DR is functionally and electrically equivalent to UCC37324D with identical pinout, supply voltage range, output current rating, and operating temperature specifications. The primary difference is product status (Active vs. Last Time Buy) and packaging format (Cut Tape & Digi-Reel vs. Tube). No design modifications are required.

Q: Why do some substitutes have different operating temperature ranges? A: Operating temperature range is a fundamental design specification determined by the semiconductor manufacturer's process and qualification testing. Parts with narrower ranges (e.g., -40°C to 125°C) may not be suitable for industrial or automotive applications requiring -55°C to 150°C operation. Verify application temperature requirements before selecting a substitute with a reduced range.

Q: Can I substitute a part with higher supply voltage rating? A: Yes. A substitute with a higher maximum supply voltage rating (e.g., 4.5V–35V vs. 4.5V–15V) is compatible provided the minimum supply voltage (4.5V) is maintained and your circuit does not exceed the original part's 15V specification. Higher voltage ratings provide design margin and flexibility for future applications but do not affect compatibility at the original operating voltage.

Q: What does ROHS3 compliance mean? A: ROHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates the part contains no lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls, or polybrominated diphenyl ethers above specified thresholds. All recommended substitutes maintain ROHS3 compliance, ensuring compatibility with environmental regulations and customer requirements.

Q: How does Moisture Sensitivity Level (MSL) affect part handling? A: MSL rating specifies the maximum time a component can be exposed to ambient conditions (typically 30°C, 60% relative humidity) before requiring baking. MSL-1 parts have unlimited shelf life; MSL-2 parts require baking after 1 year of storage; MSL-3 parts require baking after 168 hours. Verify storage and handling procedures with your component supplier to maintain part reliability.

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