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AP1506 150KHz, 3A PWM Buck DC/DC Converter Anachip Corp. www.anachip.com.tw Rev.1.3 Oct 24, 2005 3/13 Absolute Maximum Ratings Symbol Parameter Rating Unit VCC Supply Voltage +24 V VSD ON /OFF Pin Input Voltage -0.3 to +18 V VFB Feedback Pin Voltage -0.3 to +18 V VOUT Output Voltage to Ground -1 V PD Power Dissipation Internally limited W TST Storage Temperature -65 to +150 oC TOP Operating Temperature -40 to +125 oC VOP Operating Voltage +4.5 to +22 V Electrical Characteristics (All Output Voltage Versions) Unless otherwise specified, VIN=12V for 3.3V, 5V, adjustable version and VIN=18V for the 12V version. ILOAD = 0.5A Symbol Parameter Conditions Min. Typ. Max. Unit -50 IFB Feedback Bias Current VFB=1.3V (Adjustable version only) -10 -100 nA 127 150 173 FOSC Oscillator Frequency 110 173 KHz FSCP Oscillator Frequency of Short Circuit Protect When current limit occurred and VFB < 0.5V, Ta=25 oC 10 30 50 KHz 1.6 VSAT Saturation Voltage IOUT=3A No outside circuit VFB=0V force driver on 1.4 1.7 V Max. Duty Cycle (ON) VFB=0V force driver on 100 DC Min. Duty Cycle (OFF) VFB=12V force driver off 0 % 5.5 ICL Current Limit Peak current No outside circuit VFB=0 force driver on 3.6 4.5 6.5 A Output = 0V No outside circuit VFB=12 force driver off -200 uA IL Output =-1V Output Leakage Current VIN=22V -5 mA IQ Quiescent Current VFB=12 force driver off 5 10 mA 150 ISTBY Standby Quiescent Current ON /OFF pin=5V VIN=22V 70 200 uA VIL Low (regulator ON) - 0.6 VIH ON /OFF Pin Logic Input Threshold Voltage High (regulator OFF) 2.0 1.3 - V IH ON /OFF Pin Logic Input Current VLOGIC=2.5V (OFF) -0.01 IL ON /OFF Pin Input Current VLOGIC=0.5V (ON) -0.1 -1 uA TO220-5L 2.5 TO263-5L 3.5 θJC Thermal Resistance Junction to Case PDIP-8L 12 oC/W TO220-5L 28 TO263-5L 23 θJA Thermal Resistance Junction to Ambient PDIP-8L with copper area of approximately 3 in 2 35 oC/W Specifications with boldface type are for full operating temperature range, the other type are for TJ=25ºC. |
