UCC27323P Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The UCC27323P 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 inverting gate driver operates with a supply voltage range of 4.5V to 15V and delivers peak output currents of 4A (source and sink). The device is packaged in an 8-PDIP through-hole configuration and is currently in Last Time Buy status, making identification of functionally equivalent alternatives essential for design continuity and long-term component availability.

Key Parameters

Parameter	UCC27323P
Manufacturer	Texas Instruments
Driven Configuration	Low-Side
Number of Drivers	2
Gate Type	N-Channel, P-Channel MOSFET
Input Type	Inverting
Voltage - Supply	4.5V ~ 15V
Current - Peak Output (Source, Sink)	4A, 4A
Package / Case	8-DIP (0.300", 7.62mm)
Operating Temperature	-55°C ~ 150°C (TJ)
Product Status	Last Time Buy
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the UCC27323P is determined by the following critical parameters:

Package Compatibility: All substitutes must use 8-DIP (0.300", 7.62mm) through-hole packaging to ensure direct PCB compatibility
Driven Configuration: Low-side driver topology must be maintained
Channel Count: Dual independent driver channels required
Input Logic Type: Inverting input configuration
Supply Voltage Range: Minimum 4.5V lower bound; upper limit may vary (15V to 20V acceptable)
Peak Output Current: Minimum 4A source/sink capability preferred; lower ratings acceptable only with application-specific verification
Gate Type Compatibility: N-Channel and P-Channel MOSFET support required
Operating Temperature Range: Extended temperature operation (-55°C to 150°C) preferred for industrial applications

The substitute parts listed below meet these core substitution criteria while maintaining functional equivalence within the low-side gate driver category.

Parameter Comparison

Parameter	UCC27323P	UCC27524P	IR4426PBF	IXDI602PI	MIC4423YN	MIC4423ZN	MIC4426YN	MIC4426ZN	TSC426CPA+
Manufacturer	Texas Instruments	Texas Instruments	International Rectifier	IXYS Integrated Circuits	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Analog Devices Inc./Maxim
Driven Configuration	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side
Number of Drivers	2	2	2	2	2	2	2	2	2
Input Type	Inverting	Non-Inverting	Inverting	Inverting	Inverting	Inverting	Inverting	Inverting	Inverting
Voltage - Supply	4.5V ~ 15V	4.5V ~ 18V	6V ~ 20V	4.5V ~ 35V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V
Current - Peak Output (Source, Sink)	4A, 4A	5A, 5A	2.3A, 3.3A	2A, 2A	3A, 3A	3A, 3A	1.5A, 1.5A	1.5A, 1.5A	1.5A, 1.5A
Rise / Fall Time (Typ)	20ns, 15ns	7ns, 6ns	15ns, 10ns	7.5ns, 6.5ns	28ns, 32ns	28ns, 32ns	20ns, 29ns	20ns, 29ns	25ns, 25ns
Operating Temperature	-55°C ~ 150°C (TJ)	-40°C ~ 140°C (TJ)	-40°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-40°C ~ 150°C (TJ)	0°C ~ 150°C (TJ)	-40°C ~ 150°C (TJ)	0°C ~ 150°C (TJ)	0°C ~ 70°C (TA)
Package / Case	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)
Product Status	Last Time Buy	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not Specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility)

UCC27524P and IR4426PBF represent the most direct alternatives from established manufacturers with active product status. UCC27524P offers superior output current capability (5A vs 4A) and faster switching performance (7ns/6ns rise/fall times), though it employs non-inverting logic requiring circuit redesign. IR4426PBF maintains inverting input logic matching the UCC27323P but operates within a higher supply voltage range (6V minimum) and delivers lower peak output current (2.3A/3.3A asymmetric).

IXDI602PI from IXYS provides the widest supply voltage range (4.5V to 35V) and maintains full temperature range coverage (-55°C to 150°C), making it suitable for applications requiring extended operating conditions. However, peak output current is limited to 2A.

Secondary Substitutes (Conditional Compatibility)

Microchip Technology MIC4423 and MIC4426 series devices (YN and ZN variants) maintain inverting input configuration and 8-DIP packaging. MIC4423 variants deliver 3A peak output current, meeting or exceeding the UCC27323P requirement. MIC4426 variants are limited to 1.5A output current and are suitable only for applications with reduced drive current demands. Temperature range variants (YN: -40°C to 150°C; ZN: 0°C to 150°C) must be selected based on application requirements.

TSC426CPA+ from Analog Devices/Maxim Integrated provides inverting logic and 8-DIP packaging but operates within a restricted temperature range (0°C to 70°C ambient), limiting applicability to commercial-grade applications only.

Compliance Considerations

All substitute parts maintain ROHS3 compliance and EAR99 export classification consistent with the UCC27323P. Selection should prioritize parts with active product status to ensure long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can UCC27524P directly replace UCC27323P without circuit modification?

A: UCC27524P uses non-inverting input logic while UCC27323P uses inverting logic. Direct pin-for-pin substitution will invert the gate drive signal, requiring circuit redesign of the input signal path. The supply voltage range (4.5V to 18V) is compatible, and output current capability is superior (5A vs 4A).

Q: What is the key difference between MIC4423 and MIC4426 variants?

A: Both are inverting low-side gate drivers in 8-DIP packaging from Microchip Technology. MIC4423 delivers 3A peak output current, while MIC4426 delivers 1.5A. Selection depends on gate drive current requirements. Temperature variants (YN: -40°C to 150°C; ZN: 0°C to 150°C) must match application operating conditions.

Q: Is IR4426PBF suitable for applications requiring 4A output current?

A: IR4426PBF delivers asymmetric output current: 2.3A source and 3.3A sink. This is below the UCC27323P specification of 4A symmetric output. Use is conditional on application-specific analysis of gate drive current requirements and MOSFET switching characteristics.

Q: Which substitute offers the widest operating temperature range?

A: IXDI602PI and UCC27323P both support -55°C to 150°C junction temperature operation. IXDI602PI additionally supports extended supply voltage range (4.5V to 35V), providing flexibility for applications with variable power supply conditions.

Q: Are all substitutes available in 8-DIP through-hole packaging?

A: Yes. All listed substitutes use 8-DIP (0.300", 7.62mm) through-hole packaging, ensuring direct PCB footprint compatibility with UCC27323P designs.

Q: What is the impact of supply voltage range differences on substitution?

A: UCC27323P operates from 4.5V to 15V. Substitutes with higher upper limits (18V, 20V, 35V) are backward compatible. Substitutes with higher lower limits (IR4426PBF: 6V minimum) may not operate in applications using 4.5V to 5.9V supply voltages. Verify supply voltage compatibility before selection.

Q: Does product status affect long-term availability?

A: UCC27323P is in Last Time Buy status, indicating discontinued production. All listed substitutes maintain Active product status, ensuring continued manufacturing and supply chain availability for new designs and production runs.

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