AO4904 Dual N-Channel Enhancement Mode Field Effect Transistor with Schottky Diode General Description Features The AO4904 uses advanced trench technology to provide excellent R DS(ON) and low gate charge. The two MOSFETs make a compact and efficient switch and synchronous rectifier combination for use in DC-DC converters. A Schottky diode is co-packaged in parallel with the synchronous MOSFET to boost efficiency further Standard Product AO4904 is Pb-free (meets ROHS & Sony 259 specifications). AO4904L is a Green Product ordering option. AO4904 and AO4904L are electrically identical. VDS (V) = 30V ID = 6.9A (VGS = 10V) RDS(ON) < 27mΩ (VGS = 10V) RDS(ON) < 32mΩ (VGS = 4.5V) RDS(ON) < 50mΩ (VGS = 2.5V) S2 G2 S1/A G1 1 2 3 4 8 7 6 5 SCHOTTKY VDS (V) = 30V, IF = 3A, VF=0.5V@1A D1 D2 D2 D1/K D1/K K A G1 SOIC-8 VGS Gate-Source Voltage TA=25°C Pulsed Drain Current A TA=70°C B ID IDM S2 MOSFET TA=25°C A TA=70°C Pulsed Forward Current B V V 5.8 A 40 TA=70°C Power Dissipation TJ, TSTG Junction and Storage Temperature Range Parameter: Thermal Characteristics MOSFET A t ≤ 10s Maximum Junction-to-Ambient A Maximum Junction-to-Ambient Maximum Junction-to-Lead C Thermal Characteristics Schottky Maximum Junction-to-AmbientA Maximum Junction-to-Ambient C Maximum Junction-to-Lead IF A Alpha & Omega Semiconductor, Ltd. PD Steady-State Steady-State t ≤ 10s Steady-State Steady-State Symbol RθJA RθJL RθJA RθJL Units ±12 6.9 IFM TA=25°C Schottky 30 VKA Schottky reverse voltage Continuous Forward Current G2 S1 Absolute Maximum Ratings TA=25°C unless otherwise noted Parameter Symbol VDS Drain-Source Voltage Continuous Drain Current D2 30 3 V 2 A 2 40 2 1.44 1.44 -55 to 150 -55 to 150 °C Typ Max Units 48 62.5 74 35 110 40 47.5 62.5 71 32 110 40 W °C/W °C/W AO4904 Electrical Characteristics (TJ=25°C unless otherwise noted) Symbol Parameter STATIC PARAMETERS BVDSS Drain-Source Breakdown Voltage IDSS Zero Gate Voltage Drain Current Conditions Min ID=250µA, VGS=0V 30 1 TJ=55°C 5 Gate-Body leakage current VDS=0V, VGS= ±12V VGS(th) Gate Threshold Voltage VDS=VGS ID=250µA 0.7 ID(ON) On state drain current VGS=4.5V, VDS=5V 25 100 nA 1.4 V 22.6 27 33 40 VGS=4.5V, ID=6.0A 27 32 mΩ VGS=2.5V, ID=5A 42 50 mΩ TJ=125°C gFS Forward Transconductance VSD Diode Forward Voltage IS=1A Maximum Body-Diode Continuous Current IS VDS=5V, ID=5A DYNAMIC PARAMETERS Ciss Input Capacitance Coss Output Capacitance Crss Reverse Transfer Capacitance Rg Gate resistance SWITCHING PARAMETERS Qg Total Gate Charge Qgs Gate Source Charge µA 1 VGS=10V, ID=6.9A Static Drain-Source On-Resistance Max Units V VDS=24V, VGS=0V IGSS RDS(ON) Typ 12 A 16 0.71 846 VGS=0V, VDS=15V, f=1MHz mΩ S 1 V 3 A 1050 pF 96 pF 67 pF VGS=0V, VDS=0V, f=1MHz 1.24 3.6 Ω 9.6 12 nC VGS=4.5V, VDS=15V, ID=6.9A 1.65 nC Qgd Gate Drain Charge 3 tD(on) Turn-On DelayTime 5.7 8.55 ns tr Turn-On Rise Time 13 6.2 ns tD(off) Turn-Off DelayTime tf Turn-Off Fall Time trr Body Diode Reverse Recovery time Qrr VGS=10V, VDS=15V, RL=2.2Ω, RGEN=3Ω nC 37 40 ns 4.2 5.5 ns IF=5A, dI/dt=100A/µs 15.5 20 Body Diode Reverse Recovery charge IF=5A, dI/dt=100A/µs 7.9 SCHOTTKY PARAMETERS VF Forward Voltage Drop IF=1.0A 0.45 0.007 0.05 Irm VR=30V VR=30V, TJ=125°C Maximum reverse leakage current VR=30V, TJ=150°C CT Junction Capacitance VR=15V ns nC 0.5 3.2 10 12 37 20 V mA pF 2 A: The value of R θJA is measured with the device mounted on 1in FR-4 board with 2oz. Copper, in a still air environment with T A =25°C. The value in any given application depends on the user's specific board design. The current rating is based on the t ≤ 10s thermal resistance rating. B: Repetitive rating, pulse width limited by junction temperature. C. The R θJA is the sum of the thermal impedence from junction to lead R θJL and lead to ambient. D. The static characteristics in Figures 1 to 6,12,14 are obtained using 80 µs pulses, duty cycle 0.5% max. E. These tests are performed with the device mounted on 1 in 2 FR-4 board with 2oz. Copper, in a still air environment with T A=25°C. The SOA curve provides a single pulse rating. Rev 3 : August 2005 THIS PRODUCT HAS BEEN DESIGNED AND QUALIFIED FOR THE CONSUMER MARKET. APPLICATIONS OR USES AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS ARE NOT AUTHORIZED. AOS DOES NOT ASSUME ANY LIABILITY ARISIN OUT OF SUCH APPLICATIONS OR USES OF ITS PRODUCTS. AOS RESERVES THE RIGHT TO IMPROVE PRODUCT DESIGN, FUNCTIONS AND RELIABILITY WITHOUT NOTICE. Alpha & Omega Semiconductor, Ltd. AO4904 TYPICAL ELECTRICAL AND THERMAL CHARACTERISTICS 30 20 10V 3V 25 20 2.5V 15 ID(A) ID (A) VDS=5V 16 4.5V 10 8 125°C VGS=2V 5 12 0 0 0 1 2 3 4 0 5 0.5 1.5 2 2.5 3 1.7 Normalized On-Resistance 60 VGS=2.5V 50 RDS(ON) (mΩ) 1 VGS (Volts) Figure 2: Transfer Characteristics VDS (Volts) Fig 1: On-Region Characteristics 40 VGS=4.5V 30 20 VGS=10V 10 0 5 10 15 1.6 ID=5A 1.5 VGS=10V VGS=4.5V 1.4 1.3 VGS=2.5V 1.2 1.1 1 0.9 0.8 20 0 ID (A) Figure 3: On-Resistance vs. Drain Current and Gate Voltage 50 100 150 200 Temperature (°C) Figure 4: On resistance vs. Junction Temperature 70 1.0E+01 60 1.0E+00 ID=5A 1.0E-01 50 40 125°C 30 25°C IS (A) RDS(ON) (mΩ) 25°C 4 125°C 1.0E-02 1.0E-03 25°C 1.0E-04 1.0E-05 20 1.0E-06 10 0 2 4 6 8 VGS (Volts) Figure 5: On resistance vs. Gate-Source Voltage Alpha & Omega Semiconductor, Ltd. 10 0.0 0.2 0.4 0.6 0.8 1.0 VSD (Volts) Figure 6: Body-Diode Characteristics 1.2 AO4904 TYPICAL ELECTRICAL AND THERMAL CHARACTERISTICS 1500 5 VDS=15V ID=6.9A Capacitance (pF) VGS (Volts) 4 f=1MHz VGS=0V 1250 3 2 Ciss 1000 1 750 500 Coss 250 0 0 2 4 6 8 10 0 12 0 Qg (nC) Figure 7: Gate-Charge Characteristics 100.0 ID (A) 20 25 30 30 10ms 0.1s 1.0 15 T J(Max)=150°C T A=25°C 100µs 1ms 10 40 Power (W) 10.0 5 VDS (Volts) Figure 8: Capacitance Characteristics T J(Max)=150°C T A=25°C RDS(ON) limited Crss 1s 20 10 10s DC 0 0.001 0.1 0.1 1 10 100 VDS (Volts) ZθJA Normalized Transient Thermal Resistance D=T on/T T J,PK =T A+PDM.ZθJA.RθJA RθJA=62.5°C/W 0.1 1 10 100 1000 Pulse Width (s) Figure 10: Single Pulse Power Rating Junction-toAmbient (Note E) Figure 9: Maximum Forward Biased Safe Operating Area (Note E) 10 0.01 In descending order D=0.5, 0.3, 0.1, 0.05, 0.02, 0.01, single pulse 1 PD 0.1 T on Single Pulse 0.01 0.00001 0.0001 0.001 0.01 0.1 1 T 10 Pulse Width (s) Figure 11: Normalized Maximum Transient Thermal Impedance Alpha & Omega Semiconductor, Ltd. 100 1000 AO4904 TYPICAL ELECTRICAL AND THERMAL CHARACTERISTICS: SCHOTTKY 250 10 f = 1MHz Capacitance (pF) 1 IF (Amps) 200 125°C 0.1 0.01 150 100 50 25°C 0.001 0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 0 VF (Volts) Figure 12: Schottky Forward Characteristics 10 15 20 25 30 VKA (Volts) Figure 13: Schottky Capacitance Characteristics 0.7 100 0.6 IF=3A Leakage Current (mA) VF (Volts) 5 0.5 0.4 IF=1A 0.3 0.2 10 1 VR=30V 0.1 0.01 0.001 0.1 0 25 50 75 100 125 Temperature (°C) 150 0 175 25 50 75 100 125 150 175 Temperature (°C) Figure 15: Schottky Leakage current vs. Junction Temperature Figure 14: Schottky Forward Drop vs. Junction Temperature ZθJA Normalized Transient Thermal Resistance 10 1 D=T on/T T J,PK =T A+PDM.ZθJA.RθJA RθJA=62.5°C/W In descending order D=0.5, 0.3, 0.1, 0.05, 0.02, 0.01, single pulse PD 0.1 T on Single Pulse 0.01 0.00001 0.0001 0.001 0.01 0.1 1 T 10 Pulse Width (s) Figure 15: Schottky Normalized Maximum Transient Thermal Impedance Alpha & Omega Semiconductor, Ltd. 100 1000