FDR8321L Datasheet, PDF (2/8 Pages) Fairchild Semiconductor – P-Channel MOSFET With Gate Driver For Load Switch Application

Electrical Characteristics (T_A = 25°C unless otherwise noted)
Symbol Parameter
Conditions
Min Typ Max Units
OFF CHARACTERISTICS
I_FL
Forward Leakage Current
ON CHARACTERISTICS (Note 3)
V_IN = 5 V, V_ON/OFF = 0 V
1
µA
V_DROP
R_DS(ON)
I_L
Conduction Voltage Drop
Q₂ - Static Drain-Source On-Resistance
Load Current
V_IN = 5 V, V_ON/OFF = 3.3 V, I_L = 2.9 A
V_IN = 2.5 V, V_ON/OFF = 3.3 V, I_L= 2 A
V_GS = -5 V, I_D = -2.9 A
V_GS = -2.5 V, I_D = -2 A
V_DROP = 0.2 V, V_IN = 5 V, V_ON/OFF = 3.3 V
V_DROP = 0.2 V, V_IN = 2.5 V, V_ON/OFF = 3.3 V
0.185 0.2
V
0.18 0.2
0.06 0.07
Ω
0.09 0.105
2.9
A
2
Notes:
1. V_IN=5V, V_ON/OFF=8V, V_DROP=0.2V, T_A=25^oC
2. R_θJA is the sum of the junction-to-case and case-to-ambient thermal resistance where the case thermal reference is defined as the solder mounting surface of the drain pins. R_θJC is guaranteed by
design while R_θCA is determined by the user's board design. R_θJA typical =156^oC/W when mounted on a minimum 0.0025 in² pad on FR-4.
3. Pulse Test: Pulse Width < 300µs, Duty Cycle < 2.0%
FDR8321L Load Switch Application
APPLICATION CIRCUIT
Q2
IN
R1
OUT
C1
Ci
ON/OFF
Q1
R2
Co
LOAD
External Component Recommendation
First select R2, 100 - 1kΩ, for Slew Rate control.
C1 ≤ 1000pF can be added in addition to R2 for further In-rush current control.
Then select R1 such that R1/R2 ratio maintains between 10 - 100. R1 is required to turn Q2 off.
For SPICE simulation, users can download a "FDR8321L.MOD" Spice model from Fairchild Web Site at
www.fairchildsemi.com
FDR8321L Rev.C