KA7632/KA7633. Fixed Multi-output Regulator. Description. Features. Internal Block Diagram.

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1 Fixed Multioutput Regulator Features Output Currents up to.5a (output1 & ) Output Current up to 1A with External Transistor (output3) Fixed Precision Output 1 voltage 3.3V ± % Fixed Precision Output voltage V ± % (KA73) Fixed Precision Output voltage 9V ± % (KA733) Control Signal Generator for Output 3 voltage (5.1V ± %) Reset Facility for Output Voltage1 Output,3 with Disable by TTL Input Current Limit Protection at Each Output Thermal Shut Down Description The KA73/KA733 is a multioutput positive voltage regulator designed to provide fixed precision output voltages of 3.3V, V (KA73) / 9V (KA733) at current up to.5a and 5.1V at current up to 1A with external PNP transistor. An internal reset circuit generates a reset pulse when the output 1 decrease below the regulated value. Output & 3 can be disabled by TTL input. Protection features include over voltage protection, short circuit protection and thermal shutdown. 1SIP H/S Internal Block Diagram DEL.CAP 3 Cd 1nF RESET Vsys 1K A1 "Y" 7 Control 1 Output3 SCP 1uA Vin1 SW 1 Bandgap Reference 5mV Output,3 Thermal Shut Down Vin.5V 1.V OVP SCP OVP SCP Vin1 9 Vin Output 1 Output 5 GND Disable Rev Fairchild Semiconductor Corporation

2 Absolute Maximum Ratings Parameter Symbol Value Unit Remark DC Input Voltage Vin V Disable Input Voltage Vc V Output Current Io.5 A Power Dissipation Pd 1.5 W No Heatsink Junction Temperature Tj 15 C Operating Temperature Topr ~15 C Electrical Characteristics(KA73) (Refer to test circuit Vin1=V,Vin=1.5V,Tj = 5 C, unless otherwise specified) Output Voltage 1 Output Voltage Parameter Symbol Conditions Min. Typ. Max. Unit Vo1 Vo Io1=1mA V<Vin1<1V 5mA<Io1<5mA Io=1mA 1.5V<Vin<1V 5mA<Io<5mA Dropout Output Voltage 1, Vd1, Io1,=5mA.5 V Line Regulation 1, Vo 1, Load Regulation 1, Vo 1, V <Vin1<1V 1.5V <Vin<1V Io1, = ma 5mA < Io1< 5mA 5mA <Io< 5mA Notes: 1. To check the reset circuit,the reset output is low to discharge the delay capacitor(=cd). if it s less than Vo1.5V. And the reset output is high when the delay capacitor voltage linearly increased by the interal current source(1µa) if it s more than Vo1.V. The equations of delay time is same as below. Trd = (Cd.5) / 1µA. These parameters, although guaranteed, are not 1% tested in production Output Voltage 3 Vo3 Vsys=7V, Io3=1mA V Line Regulation 3 Vo3 13V< Vin <1V, Io3 =1mA 5 mv Load Regulation 3 Vo3 5mA < Io3 < 1A 11 mv Reset Pulse Delay Trd Cd=1nF, Note1 5 ms Saturation Voltage in Reset Condition VrL I=5mA. V Leakage Current at Pin IrH V=1V 1 µa Output Voltage Thermal Drift STt C <Tj < 15 C, Note 1 ppm/ C Short Circuit Output Current Isc1, Vin1=V,Vin =1.5V 1. A Disable Voltage High VdisH Output Active V Disable Voltage Low VdisL Output Disabled. V Disable Bias Current Idis V < Vdis < 7V 1 µa Junction Temperature for TSD Ttsd Note 15 C Quiescent Current Iq Io1=1mA, Output Disabled ma Reset Threshold Voltage Vr K=Vo1 K. K.5 K.1 V Reset Threshold Hysteresis Vrth Note ma V V mv mv

3 Electrical Characteristics(KA733) (Refer to test circuit Vin1=V,Vin=11.5V,Tj = 5 C, unless otherwise specified) Output Voltage 1 Output Voltage Parameter Symbol Conditions Min. Typ. Max. Unit Vo1 Vo Io1=1mA V<Vin1<1V 5mA<Io1<5mA Io=1mA 11.5V<Vin<1V 5mA<Io<5mA Dropout Output Voltage 1, Vd1, Io1,=5mA.5 V Line Regulation 1, Vo 1, Load Regulation 1, Vo 1, V <Vin1<1V 11.5V <Vin<1V Io1, = ma 5mA < Io1< 5mA 5mA <Io< 5mA Notes: 1. To check the reset circuit,the reset output is low to discharge the delay capacitor(=cd). if it s less than Vo1.5V. And the reset output is high when the delay capacitor voltage linearly increased by the interal current source(1µa) if it s more than Vo1.V. The equations of delay time is same as below. Trd = (Cd.5) / 1µA. These parameters, although guaranteed, are not 1% tested in production Output Voltage 3 Vo3 Vsys=7V, Io3=1mA V Line Regulation 3 Vo3 13V< Vin <1V, Io3 =1mA 5 mv Load Regulation 3 Vo3 5mA < Io3 < 1A 11 mv Reset Pulse Delay Trd Cd=1nF, Note1 5 ms Saturation Voltage in Reset Condition VrL I=5mA. V Leakage Current at Pin IrH V=1V 1 µa Output Voltage Thermal Drift STt C <Tj < 15 C, Note 1 ppm/ C Short Circuit Output Current Isc1, Vin1=V,Vin =11.5V 1. A Disable Voltage High VdisH Output Active V Disable Voltage Low VdisL Output Disabled. V Disable Bias Current Idis V < Vdis < 7V 1 µa Junction Temperature for TSD Ttsd Note 15 C Quiescent Current Iq Io1=1mA, Output Disabled ma Reset Threshold Voltage Vr K=Vo1 K. K.5 K.1 V Reset Threshold Hysteresis Vrth Note ma V V mv mv 3

4 Typical Perfomance Characteristics Quiescent current Iq( ma) TJ = 5 o C Io1 =1mA Input voltage Vin (V) Input Voltage Vin (V) Output voltage1 Vo(V) TJ = 5 o C Io1 =1mA 7.5V<Vin1<1V 5mA<Io1<5mA Input Voltage Vin (V) Figure 1. Quiescent Current vs. Input Voltage Figure. Output Voltage1 vs. Input Voltage 1 1 Output voltage Vo(V) TJ = 5 o C Io1 =1mA 1.5V<Vin1<1V 5mA<Io1<5mA 1 15 Input voltage Vin (V) Output voltage Vo(V) Disable Voltage(V) Figure 3. Output Voltage vs. Input Voltage Figure. Output Voltage vs. Disable Voltage High(Low) 5.15 Disable Bias Current( ua) 3 1 Output voltage1 Vo(V) Disable Voltage(V) Temperature Tj( ) Figure 5. Disable Bias Current vs. Disable Voltage Figure. Output Voltage1 vs. Temperature(Tj)

5 Typical Perfomance Characteristics (continued) Temperature Tj( ) 15 Figure 7. Output Voltage vs. Temperature(Tj) 5

6 Mechanical Dimensions Package Dimensions in millimeters 1SIP H/S 3.5 ±..1 ±. # ± ± MAX 1.3 ±.1.51 ±..5 ±.1. ±. 3. ±..939 ±. 1.5 ( ).59 #1 1.3 ( ) ±..39 ±. 7. ±.3.7 ±.1.9 ±..35 ± ± ±.1.5 ±.1. ±. 1.5 ±.1.5 ± MAX 3. ±..15 ±.

7 Ordering Information Product Number Package Operating Temperature KA73 KA733 1SIP H/S C to 15 C 7

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