Fairchild FDC638P User's Manual
Summary
The FDC638P is a highly efficient P-Channel MOSFET engineered for modern power management applications, featuring low on-state resistance and low gate charge. Ideal for battery charging systems, load switching circuits, and DC/DC converters requiring small footprints, particularly in SuperSOT-6 packages. This comprehensive datasheet provides detailed electrical characteristics, absolute maximum ratings, and performance curves necessary for engineers designing high-performance power electronics with superior efficiency.
Page 1 Text Content
September 2001
FDC638P P-Channel 2.5V Power Trench Specified MOSFET General Description Features This P-Channel 2.5V specified MOSFET is produced
• –4.5 A, –20 V. RDS(ON) = 48 mΩ @ VGS = –4.5 V
using Fairchild Semiconductor’s advanced
RDS(ON) = 65 mΩ @ VGS = –2.5 V
Power Trench process that has been especially tailored to minimize the on-state resistance and yet maintain
• Low gate charge (10 n C typical)
low gate charge for superior switching performance
These devices are well suited for battery power • High performance trench technology for extremely applications: load switching and power management,
low RDS(ON)
battery charging circuits, and DC/DC conversion.
• Super SOT ™ –6 package: small footprint (72% smaller than standard SO-8; low profile (1mm thick)
TM GSuper SOT -6
Absolute Maximum Ratings TA=25o C unless otherwise noted Symbol Parameter Ratings Units VDSS Drain-Source Voltage –20 V VGSS Gate-Source Voltage ±8 V ID Drain Current – Continuous (Note 1a) –4.5 A – Pulsed –20
Power Dissipation for Single Operation (Note 1a) 1.6 PD (Note 1b) 0.8
TJ, TSTG Operating and Storage Junction Temperature Range –55 to +150 °C
Thermal Characteristics RθJA Thermal Resistance, Junction-to-Ambient (Note 1a) 78 °C/W RθJC Thermal Resistance, Junction-to-Case (Note 1) 30 °C/W
Package Marking and Ordering Information Device Marking Device Reel Size Tape width Quantity .638 FDC638P 7’’ 8mm 3000 units
2001 Fairchild Semiconductor Corporation FDC638P Rev F1 (W)
Page Summary Contents For Fairchild FDC638P User's Manual
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 5 |
| File Size | 154.64 KB |
| Published | June 06, 2026 |
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Frequently Asked Questions
What applications are ideal for this MOSFET?
This device is suited for load switching, power management, battery charging circuits, and DC/DC conversion.
How small is the physical footprint of the SuperSOT-6 package?
The SuperSOT™-6 package provides a significantly smaller footprint (72% smaller than standard SO-8) and low profile.
What is the maximum specified drain-source voltage (DSS)?
The absolute maximum rating for Drain-Source Voltage is –20 V.
Can this component be used in life support systems?
No, Fairchild’s products are not authorized for use as critical components in life support devices without express written approval.