ST 7812 3-terminal 1 A positive voltage regulator Features • Output Current up to 1 A • Thermal Overload Protection • Short Circuit Protection • Output Transistor Safe Operating Area Protection TO-220 Plastic Package Absolute Maximum Ratings (Ta = 25 OC) Parameter Symbol Value VI 35 Thermal Resistance Junction-Cases RθJC 5 O Thermal Resistance Junction-Air RθJA 65 O Operating Temperature Range TOPR 0 to + 125 O TS - 65 to + 150 O Input Voltage Storage Temperature Range Units V C/W C/W C C Electrical Characteristics (0 OC < TJ < 125 OC, IO = 500 mA, VI = 19 V, CI = 0.33 µF, CO = 0.1 µF, unless otherwise specified) Parameter Symbol Min. Typ. Max. 11.5 12 12.5 11.4 12 12.6 VI = 14.5 V to 30 V - - 240 VI = 16 V to 22 V - - 120 IO = 5 mA to 1.5 A - - 240 IO = 250 mA to 750 mA - - 120 Conditions TJ = + 25 OC Output Voltage VO 5 mA ≤ IO ≤ 1 A, PO ≤ 15 W VI = 14.5 V to 27 V Line Regulation 1) Load Regulation 1) Quiescent Current Quiescent Current Change Output Voltage Drift Unit V mV Regline TJ = + 25 OC Regload TJ = + 25 OC IQ TJ = + 25 OC - - 8 IO = 5 mA to 1 A - - 0.5 VI = 14.5 V to 30 V - - 1 IO = 5 mA - -1 - mV/OC - 76 - µV 55 - - dB IO = 1 A, TJ = + 25 C - 2 - V - 18 - mΩ ΔIQ ΔVO/ΔT Output Noise Voltage VN f = 10 Hz to 100 KHz, TA = + 25 OC Ripple Rejection RR f = 120 Hz, VI = 15 V to 25 V Dropout Voltage VDrop O mV mA mA Output Resistance RO f = 1 KHz Short Circuit Current ISC VI = 35 V, TA = + 25 C - 230 - mA Peak Current IPK TJ = + 25 OC - 2.2 - A 1) O Load and line regulation are specified at constant junction temperature, Changes in Vo due to heating effects must be taken into account separately. Pulse testing with low duty is used. SEMTECH ELECTRONICS LTD. ® (Subsidiary of Sino-Tech International Holdings Limited, a company listed on the Hong Kong Stock Exchange, Stock Code: 724) Dated : 21/06/2006 ST 7812 Typical Performance Characteristics SEMTECH ELECTRONICS LTD. ® (Subsidiary of Sino-Tech International Holdings Limited, a company listed on the Hong Kong Stock Exchange, Stock Code: 724) Dated : 21/06/2006 ST 7812 TO-220 PACKAGE OUTLINE SEMTECH ELECTRONICS LTD. ® (Subsidiary of Sino-Tech International Holdings Limited, a company listed on the Hong Kong Stock Exchange, Stock Code: 724) Dated : 21/06/2006