CHENMKO ENTERPRISE CO.,LTD CH491DPT SURFACE MOUNT SCHOTTKY BARRIER DIODE VOLTAGE 25 Volts CURRENT 1 Ampere APPLICATION * Low power recification for switching power supply SOT-23 .019 (0.50) .041 (1.05) .033 (0.85) * Silicon epitaxial planar .066 (1.70) CONSTRUCTION .110 (2.80) .082 (2.10) .119 (3.04) (1) MARKING * 10T CIRCUIT (2) (2) .103 (2.64) .086 (2.20) .028 (0.70) .020 (0.50) .007 (0.177) .055 (1.40) .047 (1.20) (3) .045 (1.15) .033 (0.85) (1) Dimensions in inches and (millimeters) (3) .002 (0.05) * Small surface mounting dual element linear type. (SOT-23) * Ultra low VF. (Vf=0.40V typ. at 1A) * IF=1.0A guaranteed despite size .018 (0.30) FEATURE SOT-23 MAXIMUM RATINGES ( At TA = 25oC unless otherwise noted ) SYMBOL CH491DPT UNITS Maximum Recurrent Peak Reverse Voltage RATINGS VRRM 25 Volts Maximum RMS Voltage VRMS 18 Volts Maximum DC Blocking Voltage VDC 20 Volts IO 1.0 Amps IFSM 3.0 Amps pF Maximum Average Forward Rectified Current Peak Forward Surge Current at 8.3 mSec single half sine-wave Typical Junction Capacitance between Terminal (Note 1) CJ 30 Maximum Operating Temperature Range TJ +125 o C TSTG -40 to +125 o C Storage Temperature Range ELECTRICAL CHARACTERISTICS ( At TA = 25oC unless otherwise noted ) SYMBOL CH491DPT UNITS Maximum Instantaneous Forward Voltage at IF= 1A CHARACTERISTICS VF 0.45 Volts Maximum Average Reverse Current at VR= 20V IR 200 uAmps NOTES : 1. Measured at 1.0 MHZ and applied reverse voltage of 10 volts. 2. ESD sensitive product handling required. 2002-5 RATING CHARACTERISTIC CURVES ( CH491DPT ) FIG. 2 - REVERSE CHARACTERISTICS FIG. 1 - FORWARD CHARACTERISTICS 1000 REVERSE CURRENT, (mA) 1 o -25 o C =1 Ta 10m 25 C C o 75 100m 25 o C FORWARD CURRENT, (A) 10 1m 100 o Ta=125 C 10 o 75 C 1 o 25 C 100u 10u o -25 C 1u 0.1u 0.1m 0 0.1 0.2 0.3 0.4 0.5 0 0.6 10 FORWARD VOLTAGE, (V) FORWARD POWER DISSIPATION, (W) JUNCTION CAPACITANCE , (pF) f=1MHz 1000 100 10 1 5 10 15 20 25 30 35 40 REVERSE VOLTAGE, (V) AVERAGE FORWARD CURRENT, (A) IF IO DC D=0.8 sine Tp D=0.5 1.0 T D=Tp/T VR=VRM/2 D=0.3 D=0.2 0.5 D=0.1 D=0.05 0 0 25 50 75 40 50 60 0.7 D=0.8 0.6 70 100 AMBIENT TEMPERATURE, (oC) 125 DC D=0.5 sine D=0.3 D=0.2 D=0.1 0.5 0.4 D=0.05 0.3 IF IO 0.2 Tp 0.1 0 0 0.2 0.4 0.6 0.8 1.0 T D=Tp/T Tj=Tj Max. 1.2 AVERAGE FORWARD CURRENT, (A) FIG. 5 - DERATING CURVE BY AMBIENT 1.5 30 FIG. 4 - FORWARD POWER DISSIPATION CHARACTERISTICS FIG. 3 - TYPICAL JUNCTION CAPACITANCE 10000 0 20 REVERSE VOLTAGE, (V) 1.4 1.6