ꢀ ꢁꢂ ꢂ ꢃ ꢄ ꢂꢅ ꢆ ꢀ ꢁꢂ ꢇꢃ ꢄꢂ ꢅ
ꢈ ꢉ ꢊ ꢋꢅ ꢌ ꢍꢅ ꢎ ꢏꢐ ꢐ ꢑꢒ ꢓꢏꢔ ꢁꢎꢓ ꢕꢖꢗ ꢍꢘꢒ ꢕꢖ ꢙ ꢑꢚ ꢕ ꢒꢁ ꢛꢕꢖ ꢙ ꢘꢍꢙ ꢔ ꢜꢅꢒꢐ ꢘꢑ
SLLS636D – DECEMBER 2004 – REVISED MARCH 2005
D
D
D
D
Wide Input Voltage Range . . . 3 V to 40 V
D
Precision Internal Reference . . . 2%
Short-Circuit Current Limiting
Low Standby Current
High Output Switch Current . . . Up to 1.5 A
Adjustable Output Voltage
D
D
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
Driver Collector
1
2
3
4
Switch Emitter
7
6
5
I
pk
V
OUT
Timing Capacitor
V
CC
GND
Comparator Inverting Input
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
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
PDIP (P)
Tube of 50
Reel of 1000
Tube of 75
Reel of 2500
Tube of 50
Reel of 1000
Tube of 75
Reel of 2500
MC33063AP
MC33063AP
QFN (DRJ)
MC33063ADRJR
MC33063AD
PREVIEW
−40°C to 85°C
SOIC (D)
M33063A
MC33063ADR
MC34063AP
PDIP (P)
MC34063AP
QFN (DRJ)
MC34063ADRJR
MC34063AD
PREVIEW
0°C to 70°C
SOIC (D)
M34063A
MC34063ADR
†
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.
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Copyright 2005, Texas Instruments Incorporated
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