www.fairchildsemi.com MC34063A/MC33063A SMPS Controller Features Description • • • • • • • The MC34063A/MC33063A 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, driver and 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 standby 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 Rev. 1.0.2 ©2001 Fairchild Semiconductor Corporation MC34063A/MC33063A 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 = 0°C to +70°C for the MC34063, TA= -40°C to the +85°C for the MC33063, unless otherwise specified) Parameter Symbol Conditions Min. Typ. Max. Unit OSCILLATOR ICHG VCC = 5 to 40V TA = 25°C 22 31 42 µA Discharging Current IDISCHG VCC = 5 to 40V TA = 25°C 140 190 260 µA Oscillator Amplitude V(OSC) TA = 25°C - 0.5 - V V7 = VCC , TA = 25°C 5.2 6.1 7.5 - ICHG = IDISCHG TA = 25°C 250 300 350 mV Charging Current Discharge To Charge Current Ratio Current Limit Sense Voltage K VSENSE(C.L) OUTPUT SWITCH Saturation Voltage 1 (Note) VCE(SAT)1 ISW = 1.0A VC(driver) = VC(SW) - 0.95 1.3 V Saturation Voltage 2 (Note) VCE(SAT)2 ISW = 1.0A, VC(driver) = 50mA - 0.45 0.7 V DC Current Gain (Note) GI(DC) ISW = 1.0A, VCE = 5.0V, TA = 25°C 50 180 - - Collector off State Current (Note) IC(OFF) VCE = 40V, TA = 25°C - 0.01 100 µA 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 - - 4.0 TOTAL DEVICE Supply Current MC34063 MC33063 ICC VCC = 5 to 40V CT = 0.001uF V7 = VCC, V5>VTH pin2 = GND Note : Output switch tests are performed under pulsed conditions to minimize power dissipation 2 mA - - 5.0 MC34063A/MC33063A Typical Performance Characteristics Temperature (°C) Figure 1. Temperature Drift (VTH) Temperature (°C) Figure 2. Temperature Drift (IOC) 3 MC34063A/MC33063A Mechanical Dimensions Package 2.54 0.100 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 0.060 ±0.004 #5 1.524 ±0.10 #4 0.018 ±0.004 #8 9.60 MAX 0.378 #1 9.20 ±0.20 0.362 ±0.008 ( 6.40 ±0.20 0.252 ±0.008 0.46 ±0.10 0.79 ) 0.031 8-DIP MC34063A/MC33063A Mechanical Dimensions (Continued) Package 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 MC34063A/MC33063A Ordering Informatio Product Number 6 Package MC34063AP 8-DIP MC34063AD 8-SOP MC33063AP 8-DIP MC33063AD 8-SOP Operating Temperature 0 ~ + 70°C -40 ~ + 85°C MC34063A/MC33063A 7 MC34063A/MC33063A 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 6/21/01 0.0m 001 Stock#DSxxxxxxxx 2001 Fairchild Semiconductor Corporation