www.fairchildsemi.com KA34063A SMPS Controller Features Description * * * * The KA34063A is a monolithic regulator sub system intended for use as DC to DC converter. This device contains a temperature compensated bandgap reference, a duty cycle control oscillator, a driver, and a high current output switch. It can be used for step down, step up or inverting switching regulators as well as for series pass regulators. Operation From 3.0 to 40V Input Short Circuit Current Limiting Low Stand-by Current Output Switch Current of 1.5A Without External Transistors * Output Voltage Adjustable * Frequency of Operation From 100Hz to 100kHz * Step-up, Step-Down or Inverting Switching Regulators 8-DIP 1 8-SOP 1 Internal Block Diagram DRIVE COLLECTOR 8 1.25V REF VTG COMP 5 SWITCH COLLECTOR 1 S Q COMPARATOR INVERTING INPUT Q2 Q1 4 IPK SENSE GND RD 7 OSCILLATOR TIMING CAPACITOR R 3 * VCC(6) 2 Rev. 1.0.1 (c)2002 Fairchild Semiconductor Corporation KA34063A Absolute Maximum Ratings Parameter Symbol Value Unit VCC 40 V VI(COMP) -0.3 ~ +40 V Switch Collector Voltage VC(SW) 40 V Switch Emitter Voltage VE(SW) 40 V VCE(SW) 40 V VC(DR) 40 V ISW 1.5 A TSTG -65 ~ +150 C Supply Voltage Comparator Input Voltage Range Switch Collector To Emitter Voltage Driver Collector Voltage Switch Current Storage Temperature Range Electrical Characteristics (VCC = 5.0V, TA = 0C to +70C , unless otherwise specified) Parameter Symbol Conditions Min. Typ. Max. Unit OSCILLATOR ICHG VCC = 5 to 40V, TA = 25C 22 31 42 A Discharging Current IDISCHG VCC = 5 to 40V, TA = 25C 140 190 260 A Oscillator Amplitude V(OSC) TA = 25C 0.5 - V Charging Current Discharge to Charge Current Ratio Current Limit Sense Voltage K VSENSE(C.L) V7 = VCC, TA = 25C 5.2 6.1 7.5 - ICHG = IDISCHG TA = 25C 250 300 350 mV OUTPUT SWITCH Saturation Voltage 1 (Note1) VCE(SAT)1 ISW = 1.0A VC(driver) = VC(SW) - 0.95 1.3 V Saturation Voltage 2 (Note1,2) VCE(SAT)2 ISW = 1.0A, VC(driver) = 50mA - 0.45 0.7 V DC Current Gain (Note1,2) GI(DC) ISW = 1.0A, VCE = 5.0V, TA = 25C 50 180 - - Collector off State Current (Note1) IC(OFF) VCE = 40V, TA = 25C - 0.01 100 A 1.21 1.24 1.29 V COMPARATOR Threshold Voltage - VTH Threshold Voltage Line Regulation VTH VCC = 3 to 40V - 2.0 5.0 mV Input Bias Current IBIAS VI = 0V - 50 400 nA VCC = 5 to 40V, CT = 0.001uF V7 = VCC, V5>VTH pin2 = GND - 2.7 4.0 mA TOTAL DEVICE Supply Current ICC Note : 1. Output switch tests are performed under pulsed conditions to minimize power dissipation. 2. These parameters, although guaranteed, are not 100% tested in production. 2 KA34063A Typical Performance Characteristics Temperature (C) Figure 1. Temperature Drift (VTH) 3 KA34063A Mechanical Dimensions Package Dimensions in millimeters #4 #5 1.524 0.10 0.060 0.004 0.46 0.10 #8 2.54 0.100 9.60 MAX 0.378 #1 9.20 0.20 0.362 0.008 ( 6.40 0.20 0.252 0.008 0.018 0.004 0.79 ) 0.031 8-DIP 5.08 MAX 0.200 7.62 0.300 3.40 0.20 0.134 0.008 +0.10 0.25 -0.05 +0.004 0~15 4 0.010 -0.002 3.30 0.30 0.130 0.012 0.33 MIN 0.013 KA34063A Mechanical Dimensions (Continued) Package Dimensions in millimeters 8-SOP MIN #5 6.00 0.30 0.236 0.012 8 0~ +0.10 0.15 -0.05 +0.004 0.006 -0.002 MAX0.10 MAX0.004 1.80 MAX 0.071 3.95 0.20 0.156 0.008 5.72 0.225 0.41 0.10 0.016 0.004 #4 1.27 0.050 #8 5.13 MAX 0.202 #1 4.92 0.20 0.194 0.008 ( 0.56 ) 0.022 1.55 0.20 0.061 0.008 0.1~0.25 0.004~0.001 0.50 0.20 0.020 0.008 5 KA34063A Ordering Information Product Number Package KA34063A 8-DIP KA34063AD 8-SOP Operating Temperature 0 ~ +70C 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. 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. www.fairchildsemi.com 9/10/02 0.0m 001 Stock#DSxxxxxxxx 2002 Fairchild Semiconductor Corporation