©2002 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.1
Features
• Opera t ion From 3.0 to 40V Input
• Short C i rcuit 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
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 switch ing regulators as well as for series pass
regulators.
8-DIP
8-SOP
1
1
Internal Block Diagram
5
1
8
2
7
3
4
COMP
OSCILLATOR
RD
Q2
Q1
SQ
R
1.25V
REF
VTG COMPARATOR
INVERTING
INPUT
DRIVE
COLLECTOR SWITCH
COLLECTOR
GND IPK SENSE
TIMING
CAPACITOR
* VCC(6)
KA34063A
SMPS Controller
KA34063A
2
Absolute Maximum Ratings
Electrical Characteristics
(VCC = 5.0V, TA = 0°C to +70°C , unless otherwise specified)
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.
Parameter Symbol Value Unit
Supply Voltage VCC 40 V
Comparator Input Voltage Range VI(COMP) -0.3 ~ +40 V
Switch Collector Voltage VC(SW) 40 V
Switch Emitter Voltage VE(SW) 40 V
Switch Collector To Emitter Voltage VCE(SW) 40 V
Driver Collector Voltage VC(DR) 40 V
Switch Current ISW 1.5 A
Storage Temperature Range TSTG -65 ~ +150 °C
Parameter Symbol Conditions Min. Typ. Max. Unit
OSCILLATOR
Charging Current ICHG VCC = 5 to 40V, TA = 25°C223142µA
Discharging Current IDISCHG VCC = 5 to 40V, TA = 25°C 140 190 260 µA
Oscillator Amplitude V(OSC) TA = 25°C0.5-V
Discharge to Charge Current Ratio K V7 = VCC, TA = 25°C 5.2 6.1 7.5 -
Current Limit Sense Voltage VSENSE(C.L) ICHG = IDISCHG
TA = 25°C250 300 350 mV
OUTPUT SWITCH
Saturation Voltage 1 (Note1) VCE(SAT)1ISW = 1.0A
VC(driver) = VC(SW) - 0.95 1.3 V
Saturation Voltage 2 (Note1,2) VCE(SAT)2ISW = 1.0A,
VC(driver) = 50mA - 0.45 0.7 V
DC Current Gain (Note1,2) GI(DC) ISW = 1.0A,
VCE = 5.0V, TA = 25°C50 180 - -
Collector off State Current (Note1) IC(OFF) VCE = 40V, TA = 25°C - 0.01 100 µA
COMPARATOR
Threshold Voltage VTH - 1.21 1.24 1.29 V
Threshold Voltage Line Regulation ∆VTH VCC = 3 to 40V - 2.0 5.0 mV
Input Bias Current IBIAS VI = 0V - 50 400 nA
TOTAL DEVICE
Supply Current ICC VCC = 5 to 40V, CT = 0.001uF
V7 = VCC, V5>VTH
pin2 = GND -2.74.0mA
KA34063A
3
Typi ca l Performance Cha ra cte ristic s
Temperature (°C)
Figure 1. Temperature Drift (VTH)
KA34063A
4
Mechanical Dimensions
Package Dimensions in millimeters
6.40
±0.20
3.30
±0.30
0.130
±0.012
3.40
±0.20
0.134
±0.008
#1
#4 #5
#8
0.252
±0.008
9.20
±0.20
0.79
2.54
0.100
0.031
()
0.46
±0.10
0.018
±0.004
0.060
±0.004
1.524
±0.10
0.362
±0.008
9.60
0.378 MAX
5.08
0.200
0.33
0.013
7.62
0~15°
0.300
MAX
MIN
0.25
+0.10
–0.05
0.010
+0.004
–0.002
8-DIP
KA34063A
5
Mechanical Dimensions (Continued)
Package Dimensions in millimeters
4.92 ±0.20
0.194 ±0.008
0.41 ±0.10
0.016 ±0.004
1.27
0.050
5.72
0.225
1.55 ±0.20
0.061 ±0.008
0.1~0.25
0.004~0.001
6.00 ±0.30
0.236 ±0.012
3.95 ±0.20
0.156 ±0.008
0.50 ±0.20
0.020 ±0.008
5.13
0.202 MAX
#1
#4 #5
0~8°
#8
0.56
0.022
()
1.80
0.071
MAX0.10
MAX0.004
MAX
MIN
+0.10
-0.05
0.15+0.004
-0.002
0.006
8-SOP
KA34063A
9/10/02 0.0m 001
Stock#DSxxxxxxxx
2002 Fairchild Semicond uctor Corporation
LIFE SU PP ORT POL ICY
FAIRCHILD’S PRODUCTS AR E NOT AUTHORIZED FOR USE AS C RITICAL COMPONENTS I N LIFE S UPPORT DEVICE S
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORA TION. As used he rein :
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 syst em who se failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effec tiv ene ss.
www.fairchildsemi.com
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRO DUCTS HEREIN TO IMPROVE RELIABILITY, FUN C TION OR DESIGN . FAIRCHILD DO ES 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 RIG HTS, NOR THE RIGHTS OF OTHERS.
Ordering Information
Product Number Package Operating Temperature
KA34063A 8-DIP 0 ~ +70°C
KA34063AD 8-SOP
