MC34151P Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The MC34151P is a low-side gate driver IC manufactured by onsemi, designed for driving N-Channel MOSFET gates in power management applications. This component operates with a supply voltage range of 6.5V to 18V and delivers peak output currents of 1.5A for both source and sink configurations. The MC34151P is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

MC34151P

onsemiIn Stock: 6127MC34151P Datasheet

Current PartRFQ

UC2709N

Texas InstrumentsIn Stock: 1796UC2709N Datasheet

SimilarRFQ

UC3709N

Texas InstrumentsIn Stock: 9938UC3709N Datasheet

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UCC27423P

Texas InstrumentsIn Stock: 5095UCC27423P Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MC34151P is determined by the following critical parameters:

• Driven Configuration: Must be Low-Side
• Number of Drivers: Must be 2
• Input Type: Must be Inverting
• Package / Case: Must be 8-DIP (0.300", 7.62mm)
• Mounting Type: Must be Through Hole
• Peak Output Current: Must meet or exceed 1.5A (source and sink)
• Supply Voltage Range: Must encompass or overlap the 6.5V ~ 18V operating window
• Logic Voltage Thresholds: Must be compatible with 0.8V VIL and 2.6V VIH

The three substitute parts identified—UC2709N, UC3709N, and UCC27423P—all satisfy these core substitution criteria. Each maintains the low-side gate driver topology, dual-channel independent configuration, inverting input logic, and 8-DIP package format required for direct replacement.

Parameter Comparison

Engineering Selection Recommendations

UC2709N is suitable for applications requiring extended supply voltage range (5V ~ 40V) and active product status. This part offers improved rise and fall times (20ns) compared to the MC34151P and maintains RoHS3 compliance. Operating temperature range is -40°C ~ 85°C.

UC3709N provides the same electrical characteristics as UC2709N with a narrower operating temperature range (0°C ~ 70°C). This part is appropriate for applications where the lower temperature limit aligns with system requirements and active product support is necessary.

UCC27423P delivers superior peak output current capability (4A source and sink) and the widest operating temperature range (-40°C ~ 125°C) among the substitutes. This part is recommended for applications requiring higher drive current or extended temperature operation. Supply voltage range is 4V ~ 15V, which overlaps the MC34151P specification window.

All three substitute parts maintain the critical low-side gate driver topology, dual-channel configuration, inverting input logic, and 8-DIP package format. All substitutes are manufactured by Texas Instruments and carry active product status with RoHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can UC2709N, UC3709N, or UCC27423P be used as direct pin-for-pin replacements for MC34151P?

A: Yes. All three substitute parts share identical 8-DIP package geometry (0.300", 7.62mm), through-hole mounting configuration, and low-side gate driver topology with dual independent channels and inverting input logic. Pin compatibility is maintained across all four parts.

Q: What is the primary difference between UC2709N and UC3709N?

A: The operating temperature range differs. UC2709N operates from -40°C to 85°C, while UC3709N operates from 0°C to 70°C. Both parts are electrically identical in all other parameters and are manufactured by Texas Instruments.

Q: Why does UCC27423P have higher peak output current (4A) compared to the MC34151P (1.5A)?

A: UCC27423P is a higher-performance gate driver variant designed for applications requiring greater drive current capability. The increased current capacity does not prevent its use as a substitute; it provides additional design margin for gate charge delivery.

Q: Is the MC34151P supply voltage range (6.5V ~ 18V) compatible with UC2709N and UC3709N (5V ~ 40V)?

A: Yes. The MC34151P operating window falls entirely within the UC2709N and UC3709N supply voltage ranges. UCC27423P operates from 4V ~ 15V, which overlaps the MC34151P specification from 6.5V to 15V.

Q: What compliance differences exist between MC34151P and the substitute parts?

A: MC34151P is RoHS non-compliant. UC2709N, UC3709N, and UCC27423P are all ROHS3 compliant. All four parts carry REACH Unaffected status and EAR99 ECCN classification.

Q: Are there logic voltage threshold differences that affect circuit design?

A: MC34151P specifies VIL = 0.8V and VIH = 2.6V. UC2709N and UC3709N specify VIL = 0.8V and VIH = 2.2V. UCC27423P specifies VIL = 1V and VIH = 2V. These variations are within typical logic signal margins and do not require circuit redesign for standard applications.