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| www.fairchildsemi.com KA78RM33 Features * * * * Low Dropout Voltage Regulator Description The KA78RM33 is a low-dropout voltage regulator suitable for various electronic equipment. It provide constant voltage power source with surface mount type package (D-PAK). dropout voltage of KA78RM33 is below 0.6V in full rated current(0.5A). This regulator has various function such as over current protection, thermal shut down and SOA (Safe operating Area) protection. D-PAK 0.5A / 3.3V Output low dropout voltage regulator Low dropout voltage (Max. 0.6V) Over current protection, Thermal shutdown SOA protection, Shortcircuit protection 1 TO-220 1 1. Vin 2. GND 3. Vout Internal Block Digram Q1 Vin 1 3 Vout Current Generator Thermal Shutdown Protection SOA Protection Short Circuit Protection Bandgap Reference Error Amp. R1 Output Drive R2 GND 2 3 Rev. 1.0.1 (c)2001 Fairchild Semiconductor Corporation KA78RM33 Absolute Maximum Ratings Parameter Input Voltage Output Current Thermal Resistance Junction-Air Power Dissipation Junction Temperature Operating Temperature Symbol Vin Value 20 0.5 110 Interally limited 150 -25~ + 125 Unit V C/W - C C Remark No Heatsink - IO RJA Pd Tj TOPR Electrical Characteristics (Vin = 5V, IO= 0.25A, Ta = 25C , unless otherwise specified) Parameter Output Voltage Load Regulation Line Regulation Ripple Rejection Ratio Dropout Voltage Quiescent Current Peak Current Output Noise Voltage Temperature Coefficient of Output Voltage Symbol VOut RlOad Rline RR Vdrop q IPK Vn VOUT/T Conditions IO =10mA 5mA < IO < 0.5A 4.3V Typ. 3.3 2 2 5 1 50 -0.2 Max. 3.38 20 20 0.6 10 - Unit V mV mV dB V mA A uVrms mV/C 2 KA78RM33 Mechanical Dimensions Package Dimensions in millimeters TO-220 9.90 0.20 1.30 0.10 2.80 0.10 (8.70) o3.60 0.10 (1.70) 4.50 0.20 1.30 -0.05 +0.10 9.20 0.20 (1.46) 13.08 0.20 (1.00) (3.00) 15.90 0.20 1.27 0.10 1.52 0.10 0.80 0.10 2.54TYP [2.54 0.20] 2.54TYP [2.54 0.20] 10.08 0.30 18.95MAX. (3.70) (45 ) 0.50 -0.05 +0.10 2.40 0.20 10.00 0.20 3 KA78RM33 Mechanical Dimensions (Continued) 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 KA78RM33 Ordering Information Product Number KA78RM33D KA78RM33 Package D-PAK TO-220 Operating Temperature -25 ~ + 125C 5 KA78RM33 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 6/20/01 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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