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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.

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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

Page 1 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...
Page 2 Electrical Characteristics TA = 25°C unless otherwise noted Symbol Parameter Test Conditions Min Typ Max Units Off Characteristics BVDSS Drain–Source Breakdown Voltage VGS = 0 V, ID = –250 µA –20 V ∆B...
Page 3 Typical Characteristics -I IN (A -I IN (A LI ZE D, D IN -S -R IS TA VGS = -4.5V 1.6 1.4 VGS = -2.5V -VDS, DRAIN TO SOURCE VOLTAGE (V) -ID, DRAIN CURRENT (A) Figure 1. On-Region Characteristics. Figure...
Page 4 Typical Characteristics -V TE -S LT (V -I IN (A S, G r(t LI ZE FF EC TI VE D, D TR SI EN TH ER ES IS TA VDS = -5V ID = -4.5A f = 1 MHz -10V VGS = 0 V Qg, GATE CHARGE (n C) -VDS, DRAIN TO SOURCE VOLTAG...
Page 5 TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. ACEx™ FAST...

Manual Details

Brand Fairchild
Pages 5
File Size 154.64 KB
Published June 06, 2026
24 views

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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.