MC33063A, MC34063A
1.5-A PEAK BOOST/BUCK/INVERTING SWITCHING REGULATORS
www.ti.com
SLLS636J–DECEMBER 2004–REVISED OCTOBER 2005
FEATURES
•
•
•
•
Wide Input Voltage Range…3 V to 40 V
High Output Switch Current…Up to 1.5 A
Adjustable Output Voltage
•
•
•
Precision Internal Reference…2%
Short-Circuit Current Limiting
Low Standby Current
Oscillator Frequency…Up to 100 kHz
D (SOIC) OR P (PDIP) PACKAGE
(TOP VIEW)
Switch Collector
Switch Emitter
Timing Capacitor
GND
1
2
3
4
8
7
6
5
Driver Collector
I
pk
V
CC
Comparator Inverting Input
DRJ (QFN) PACKAGE
(TOP VIEW)
†
Switch Collector
8
1
Driver Collector
2
3
4
Switch Emitter
7
6
5
I
pk
Timing Capacitor
V
CC
GND
Comparator Inverting Input
†
Exposed thermal pad is connected internally to GND via die attach.
DESCRIPTION/ORDERING INFORMATION
The MC33063A and MC34063A are easy-to-use ICs containing all the primary circuitry needed for building
simple dc-dc converters. These devices primarily consist of an internal temperature-compensated reference, a
comparator, an oscillator, a PWM controller with active current limiting, a driver, and a high-current output switch.
Thus, the devices require minimal external components to build converters in the boost, buck, and inverting
topologies.
The MC33063A is characterized for operation from –40°C to 85°C, while the MC34063A is characterized for
operation from 0°C to 70°C.
ORDERING INFORMATION
TA
PACKAGE(1)
ORDERABLE PART NUMBER
MC33063AP
TOP-SIDE MARKING
MC33063AP
PDIP – P
Tube of 50
QFN – DRJ
Reel of 1000
Tube of 75
MC33063ADRJR
MC33063AD
PREVIEW
–40°C to 85°C
SOIC – D
M33063A
Reel of 2500
Tube of 50
MC33063ADR
MC34063AP
PDIP – P
MC34063AP
PREVIEW
QFN – DRJ
Reel of 1000
Tube of 75
MC34063ADRJR
MC34063AD
0°C to 70°C
SOIC – D
M34063A
Reel of 2500
MC34063ADR
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2004–2005, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.