FP745L/FB745L N-Channel Logic Level PowerTrench MOFET eneral escription This N-Channel Logic Level MOFET has been designed specifically to improve the overall efficiency of C/C converters using either synchronous or conventional switching PWM controllers. These MOFETs feature faster switching and lower gate charge than other MOFETs with comparable R (ON) specifications resulting in C/C power supply designs with higher overall efficiency. Features A, 3 V March 24 R (ON) = 4.5 mω @ V = V R (ON) = 6. mω @ V = 4.5 V Critical C electrical parameters specified at elevated temperature High performance trench technology for extremely low R (ON) FP745L/FB745L C maximum junction temperature rating TO-22 FP eries TO-263AB FB eries Absolute Maximum Ratings TA=25 o C unless otherwise noted ymbol Parameter Ratings Units V rain-ource Voltage 3 V V ate-ource Voltage ± 2 V I rain Current Continuous (Note ) A Pulsed (Note ) 3 P Total Power issipation @ T C = 25 C 7 W erate above 25 C.7 W/ C T J, T T Operating and torage Junction Temperature Range 55 to + C Thermal Characteristics R θjc Thermal Resistance, Junction-to-Case.4 C/W R θja Thermal Resistance, Junction-to-Ambient 62.5 C/W Package Marking and Ordering Information evice Marking evice Reel ize Tape width Quantity FB745L FB745L 3 24mm 8 units FP745L FP745L Tube n/a 45 24 Fairchild emiconductor Corporation FP745L/FB745L Rev (W)
Electrical Characteristics T A = 25 C unless otherwise noted ymbol Parameter Test Conditions Min Typ Max Units rain-ource Avalanche Ratings (Note ) W ingle Pulse rain-ource Avalanche Energy V = 5 V, I = A 33 mj I AR Maximum rain-ource Avalanche Current A Off Characteristics BV rain ource Breakdown Voltage V = V, I = 25 µa 3 V BV T J Breakdown Voltage Temperature Coefficient I = 25 µa, Referenced to 25 C I Zero ate Voltage rain Current V = 24 V, V = V µa I ate Body Leakage V = ± 2 V, V = V ± na 25 mv/ C FP745L/FB745L On Characteristics (Note 2) V (th) ate Threshold Voltage V = V, I = 25 µa.8 3 V V(th) T J R (on) ate Threshold Voltage Temperature Coefficient tatic rain ource On Resistance I = 25 µa, Referenced to 25 C V = V, I = 5 A V = 4.5 V, I = 4 A V = V, I = 5 A, T J=25 C I (on) On tate rain Current V = V, V = V 5 A g F Forward Transconductance V = 5V, I = 5 A 65 ynamic Characteristics C iss Input Capacitance V = 5 V, V = V, 4357 pf C oss Output Capacitance f =. MHz 92 pf C rss Reverse Transfer Capacitance 6 3.5 4. 5.5 4.5 6. 7. mv/ C mω 399 pf R ate Resistance V = 5 mv, f =. MHz.4 Ω witching Characteristics (Note 2) t d(on) Turn On elay Time V = 5V, I = A, 6 29 ns t r Turn On Rise Time V = V, R EN = 6 Ω 3 24 ns t d(off) Turn Off elay Time 74 9 ns t f Turn Off Fall Time 4 66 ns Q g Total ate Charge V = 5 V, I = 5 A, 4 58 nc Q gs ate ource Charge V = 5 V 2 nc Q gd ate rain Charge 4 nc rain ource iode Characteristics and Maximum Ratings I Maximum Continuous rain ource iode Forward Current A V rain ource iode Forward Voltage V = V, I = 5 A (Note ).9.2 V t rr iode Reverse Recovery Time I F = 5 A, 48 n iode Reverse Recovery Charge d if/d t = A/µs 42 nc Q rr Notes:. Calculated continuous current based on maximum allowable junction temperature. Actual maximum continuous current limited by package constraints to A. 2. Pulse Test: Pulse Width < 3µs, uty Cycle < 2.% FP745L/FB745L Rev (W)
Typical Characteristics V = V 3.5V 6.V 4.5V 3.V 5 25 R (ON), NORMALIZE RAIN-OURCE ON-REITANCE.8.6.4.2 V = 3.V 3.5V 4.V 4.5V 5.V 6.V V FP745L/FB745L 2.5V.5.5 2 V, RAIN-OURCE VOLTAE (V) Figure. On-Region Characteristics..8 2 4 6 8 Figure 2. On-Resistance Variation with rain Current and ate Voltage. R (ON), NORMALIZE RAIN-OURCE ON-REITANCE.8.6.4.2.8 I = 5A V =V R (ON), ON-REITANCE (OHM).4.2..8.6.4 T A = 25 o C T A = 25 o C I = 5A.6-5 -25 25 5 25 5 T J, JUNCTION TEMPERATURE ( o C).2 2 4 6 8 V, ATE TO OURCE VOLTAE (V) Figure 3. On-Resistance Variation with Temperature. Figure 4. On-Resistance Variation with ate-to-ource Voltage. 9 6 45 3 5 V = V T A = 25 o C 25 o C -55 o C.5 2 2.5 3 3.5 V, ATE TO OURCE VOLTAE (V) I, REVERE RAIN CURRENT (A)... V = V T A = 25 o C 25 o C -55 o C.2.4.6.8.2.4 V, BOY IOE FORWAR VOLTAE (V) Figure 5. Transfer Characteristics. Figure 6. Body iode Forward Voltage Variation with ource Current and Temperature. FP745L/FB745L Rev (W)
Typical Characteristics V, ATE-OURCE VOLTAE (V) I = 5A V = V 2V 8 5V 6 4 2 2 3 4 5 6 7 8 Q g, ATE CHARE (nc) Figure 7. ate Charge Characteristics. CAPACITANCE (pf) 6 5 4 3 2 C oss C iss C rss 5 5 2 25 3 V, RAIN TO OURCE VOLTAE (V) f = MHz V = V Figure 8. Capacitance Characteristics. FP745L/FB745L R (ON) LIMIT V = V INLE PULE R θjc =.4 o C/W T A = 25 o C m C m m µs µs. V, RAIN-OURCE VOLTAE (V) Figure 9. Maximum afe Operating Area. P(pk), PEAK TRANIENT POWER (W) 5 4 3 2 INLE PULE R θjc =.4 C/W T A = 25 C..... t, TIME (sec) Figure. ingle Pulse Maximum Power issipation. r(t), NORMALIZE EFFECTIVE TRANIENT THERMAL REITANCE. =.5.2..5.2. INLE PULE...... t, TIME (sec) R θjc (t) = r(t) * R θja R θjc =.4 C/W P(pk t t 2 T J - T A = P * R θjc (t) uty Cycle, = t / t 2 Figure. Transient Thermal Response Curve. FP745L/FB745L Rev (W)
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