FDQ7238AS

FET, MOSFET Arrays Overview

The FDQ7238AS is a dual N-channel PowerTrench MOSFET in an SO-14 package designed to replace two single SO-8 devices. The high-side switch (Q1) minimizes switching losses, while the low-side switch (Q2) utilizes SyncFET technology with an integrated Schottky diode to reduce conduction losses. Q2 offers 14 A at 30 V with RDS(on) of 8.7 mΩ @ 10 V and 10.5 mΩ @ 4.5 V. Q1 provides 11 A at 30 V with RDS(on) of 13.2 mΩ @ 10 V and 16 mΩ @ 4.5 V. Operating junction temperature ranges from -55°C to +150°C.

FET, MOSFET Arrays Feature Summary

• Monolithic integration of a MOSFET with a Schottky diode on the low-side switch to minimize reverse recovery charge.
• Optimized high-side switch architecture specifically engineered to reduce switching losses.
• Low-side switch optimized for reduced conduction losses using SyncFET technology.

FET, MOSFET Arrays Applications

• DC to DC power supplies
• Notebook power supply circuits

FET, MOSFET Arrays Procurement Notes

Verify the component against the official datasheet specifications provided by Fairchild Semiconductor or its successor entities. Confirm that the device marking matches the part number exactly. Ensure the package type corresponds to the SO-14 configuration. Check for any specific ordering suffixes that may indicate variations in tape and reel quantities or environmental compliance status.

FET, MOSFET Arrays Selection Notes

Select this component when space constraints require replacing two discrete SO-8 MOSFETs with a single SO-14 package. Choose Q2 for applications requiring lower conduction losses and fast body diode recovery due to the integrated Schottky. Select Q1 for high-side switching where minimizing turn-on and turn-off transition times is critical for overall system efficiency.

FET, MOSFET Arrays Part Context

Originally manufactured by Fairchild Semiconductor, this component belongs to the PowerTrench family. Following corporate restructuring, Fairchild's semiconductor assets were acquired by onsemi. Consequently, the FDQ7238AS is now managed within the onsemi portfolio, though it retains its original Fairchild designation and technical characteristics.

FET, MOSFET Arrays Replacement Considerations

No public confirmed substitute part numbers are available in the source documentation.

FET, MOSFET Arrays FAQ

What is the primary function of the SyncFET technology used in the Q2 switch?

SyncFET technology embeds a Schottky diode in parallel with the PowerTrench MOSFET to exhibit similar characteristics to a discrete external Schottky diode, thereby reducing reverse recovery time and charge.

How does the thermal resistance differ between Q1 and Q2?

For minimum pad designs, the thermal resistance junction-to-ambient is 118°C/W for Q1 and 94°C/W for Q2. For larger copper pads, these values decrease to 68°C/W for Q1 and 52°C/W for Q2.

What are the maximum continuous drain currents for each switch?

The maximum continuous drain current is 14 A for the Q2 switch and 11 A for the Q1 switch.