NTE7228 Integrated Circuit Fixed Multi−Output Positive Voltage Regulator 10−Lead SIP Description: The NTE7228 is a multi−output positive voltage regulator in a 10−Lead SIP type package designed to provide fixed precision output voltages of 5.1V & 8V at current up to 0.5A and 12V at current up to 1A with an external PNP transistor. An internal reset circuit generates a reset pulse when Output 1 decreases below the regulated value. Output 2 and Output 3 can be disabled by TTL input. Protection features include over voltage protection, short circuit protection and thermal shutdown. Features: D Output Currents up to 0.5A (Output 1 & Output 2) D Output Current up to 1A with External Transistor (Output 3) D Fixed Precision Output 1 Voltage 5.1V +2% D Fixed Precision Output 2 Voltage 8V +2% D Control Signal Generator for Output 3 Voltage (12V +2%) D Reset Facility for Output Voltage 1 D Output 2 and Output 3 with Disable by TTL Input D Current Limit Protection at Each Output D Thermal Shutdown Absolute Maximum Ratings: DC Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V Disable Input Voltage, VC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V Output Current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5A Power Dissipation (No Heatsink), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5W Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +1505C Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 05 to +1255C Electrical Characteristics: (VIN1 = 7.5V, VIN2 = 10.5V, TJ = +255C unless otherwise specified) Parameter Output Voltage 1 Output Voltage 2 Dropout Output Voltage Line Regulation Symbol VO1 VO2 Test Conditions 7.5V < VIN1 < 14V 10.5V < VIN2 < 18V Typ Max Unit IO1 = 10mA 5.0 5.1 5.2 V 5mA < IO1 < 500mA 4.9 5.1 5.3 V IO2 = 10mA 7.84 8.0 8.16 V 5mA < IO2 < 500mA 7.7 8.0 8.3 V VD1 IO1 = 500mA − − 2.5 V VD2 IO2 = 500mA − − 2.5 V 7.5V < VIN1 < 14V − − 50 mV 10.5V < VIN2 < 18V − − 80 mV +VO1 IO1 = IO2 = 200mA +VO2 Load Regulation Min +VO1 5mA < IO1 < 500mA − − 100 mV +VO2 5mA < IO1 < 500mA − − 160 mV Output Voltage 3 VO3 VSYS = 13V, IO3 = 100mA 11.7 12.0 12.3 V Line Regulation 3 +VO3 13V < VIN2 < 18V, IO3 = 100mA − − 120 mV Load Regulation 3 +VO3 5mA < IO3 < 1A − − 250 mV Reset Pulse Delay Trd CD = 100nF, Note 1 − 25 − ms Saturation Voltage in Reset Condition VrL I6 = 5mA − − 0.4 V Leakage Current at Pin6 IrH V6 = 10V − − 10 5A Output Voltage Thermal Drift STt 05 < TJ < +1255C, Note 2 − 100 − ppm/5C Short Circuit Output Current ISC1 VIN1 = 7.5V − − 1.6 A ISC2 VIN2 = 10.5V − − 1.6 A Disable Voltage, High VdisH Output 2 Active 2 − − V Disable Voltage, Low VdisL Output 2 Disabled − − 0.8 V Disable Bias Current Idis 0V < Vdis < 7V −100 − 2 5A Junction Temperature for TSD Ttsd Note 2 − 145 − 5C − − 2 mA K-0.4 K-0.25 K-0.1 V 20 50 100 mA Quiescent Current Iq IO1 = 10mA, Output 2 Disabled Reset Threshold Voltage Vr K = VO1 Reset Threshold Hysteresis Vrth Note 1 Note 1. To check the reset circuit, the reset output is low to discharge the delay capacitor (= CD). If it’s less than VO1−0.25V. And the reset output is high when the delay capacitor voltage linearly increased by the internal current source (105 A) if it’s more than VO1 −0.2V. The equations of delay time is the same as below. Trd = (CD x 2.5) / 105 A. Note 2. These parameters, although guaranteed, are not 100% tested in production. Pin Connection Diagram (Front View) 10 Output 3 9 Output 1 8 Output 2 7 Control 6 RESET 5 GND 4 Disable 3 DEL. CAP 2 VIN2 1 VIN1 .150 (3.8) 1.026 (26.05) .128 (3.25) Dia .065 (1.65) .311 (7.9) .537 (13.65) 1 10 .350 (8.9) .276 (7.0) .100 (2.54) .020 (0.5) .020 (0.5)