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| www.fairchildsemi.com KA78RH33 Semi Low Dropout Voltage Regulator Features * * * * * * * * Fixed Output Voltage of +3.3V Space Saving SMD types of DPAK 1V(Typ) Dropout at Io=800mA Output Current of 800mA Thermal Shutdown Protection Over Current Protection Output trimmed to +/-1% Tolerance No minimum Load Requirement Description The KA78RH33 is a +3.3V fixed Low Dropout Voltage Regulator specifically designed for use in low voltage operation. The maximum load current is 0.8A and the dropout voltage is guaranteed to be 1V(Typ). The Dropout Voltage varies with load current. The regulator consists of composite PNP-NPN pass transistors. D-PAK 1 1. GND 2. Vout 3.Vin Internal Block Diagram 3.Vin CURRENT GENERATOR PROTECTION CIRCUIT 2.Vout 1.GND Rev. 1.0.1 (c)2001 Fairchild Semiconductor Corporation KA78RH33 Absolute Maximum Ratings Parameter Power Supply Input Voltage Output Load Current Junction Temperature Operating Junction Temperature Storage Temperature Symbol Vin Io Tj Topr Tstg Value 15 800 150 -25 ~ 125 -55 ~ 150 Unit V mA C C C Temperature Characteristics Parameter Temperature Coefficient of Output Voltage Symbol Vo/ T Value + / -0.02 Unit % / C Electrical Characteristics (Refer to the test circuit. Vin= 5V, Co=10uF, Ta = 25C, unless otherwise specified.) Parameter Output Voltage Output Voltage Line Regulation Load Regulation Ripple Rejection Dropout Voltage Quiescent Current Temperature Coefficient of Output Voltage Peak Output Current Output Noise Voltage Symbol Vout Vout Rline Rload RR Vdrop Iq Vo/ T Ipk Vn Conditions Io=10mA, Tj=25C Vin = 4.8V to 12V Io = 10mA to 800mA Tj = -25C to 125C Vin=4.8V to 12V, Io=10mA Io = 10mA to 800mA f=120Hz, Io=500mA Vin = 6.3 +/- 1Vrms Io = 100mA Io = 500mA Io = 800mA Vin <= 12V Tj = -25C to 125C Io = 10mA Vin = 6.3V f = 10Hz to 10KHz Min. 3.27 3.23 55 800 Typ. 3.3 3.3 1 1 1 1.05 1.1 5 0.2 100 Max. 3.33 3.37 10 20 1.2 1.25 1.4 10 Unit V V mV mV dB V mA mV/C mA Vrms 2 KA78RH33 Typical Application Vin Vout KA78RH33 Cin 0.1uF Gnd Co 10uF An input capacitor, Cin is not necessary for stability, but it will improve the overall performance 3 KA78RH33 Mechanical Dimensions Package Dimensions in millimeters D-PAK 6.60 0.20 5.34 0.30 (0.50) (4.34) (0.50) 0.70 0.20 2.30 0.10 0.50 0.10 0.60 0.20 6.10 0.20 2.70 0.20 9.50 0.30 0.91 0.10 0.80 0.20 MAX0.96 2.30TYP [2.300.20] 0.76 0.10 2.30TYP [2.300.20] 0.89 0.10 0.50 0.10 1.02 0.20 2.30 0.20 (0.70) (0.90) (0.10) (3.05) 6.10 0.20 9.50 0.30 2.70 0.20 (2XR0.25) 0.76 0.10 4 (1.00) 6.60 0.20 (5.34) (5.04) (1.50) MIN0.55 KA78RH33 Ordering Information Product Number KA78RH33R Package D-PAK Operating Temperature -25C to + 125C 5 KA78RH33 DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. www.fairchildsemi.com 2/20/01 0.0m 001 Stock#DSxxxxxxxx 2001 Fairchild Semiconductor Corporation 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. |
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