MC33063A_15 Datasheet, PDF (1/30 Pages) Texas Instruments – MC3x063A 1.5-A Peak Boost/Buck/Inverting Switching Regulators

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MC33063A, MC34063A
SLLS636N – DECEMBER 2004 – REVISED JANUARY 2015
MC3x063A 1.5-A Peak Boost/Buck/Inverting Switching Regulators
1 Features
•1 Wide Input Voltage Range: 3 V to 40 V
• High Output Switch Current: Up to 1.5 A
• Adjustable Output Voltage
• Oscillator Frequency Up to 100 kHz
• Precision Internal Reference: 2%
• Short-Circuit Current Limiting
• Low Standby Current
2 Applications
• Blood Gas Analyzers: Portable
• Cable Solutions
• HMIs (Human Machine Interfaces)
• Telecommunications
• Portable Devices
• Consumer & Computing
• Test & Measurement
3 Description
The MC33063A and MC34063A devices 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 device is characterized for operation
from –40°C to 85°C, while the MC34063A device is
characterized for operation from 0°C to 70°C.
Device Information⁽¹⁾
PART NUMBER PACKAGE (PIN)
BODY SIZE
SOIC (8)
4.90 mm × 3.91 mm
MC3x063A
SON (8)
4.00 mm × 4.00 mm
PDIP (8)
9.81 mm × 6.35 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Simplified Schematic
Drive ⁸
Collector
I_pk ⁷
Sense
SQ
Q2
Q1
R
100 W
I_pk
Oscillator C_T
1 _Switch
Collector
2 Switch
Emitter
6
V_CC
+
−
Comparator ⁵
Inverting Input
1.25-V
Reference
Regulator
3 _Timing
Capacitor
4
GND
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.