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Motorola Electronic Components Datasheet

MC33463 Datasheet

VARIABLE FREQUENCY MICROPOWER DC-to-DC CONVERTER

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Order this document by MC33463/D
Variable Frequency
Micropower DC-to-DC
Converter
The MC33463 series are micropower step–up switching voltage
regulators, specifically designed for handheld and laptop applications, to
provide regulated output voltages using a minimum of external parts. A wide
choice of output voltages are available. These devices feature a very low
quiescent bias current of 4.0 µA typical.
The MC33463H–XXKT1 series features a highly accurate voltage
reference, an oscillator, a variable frequency modulation (VFM) controller, a
driver transistor (Lx), a comparator and feedback resistive divider.
The MC33463H–XXLT1 is identical to the MC33463H–XXKT1, except
that a drive pin (EXT) for an external transistor is provided.
Due to the low bias current specifications, these devices are ideally suited
for battery powered computer, consumer, and industrial equipment where an
extension of useful battery life is desirable.
MC33463 Series Features:
Low Quiescent Bias Current of 4.0 µA
High Output Voltage Accuracy of ±2.5%
Low Startup Voltage of 0.9 V at 1.0 mA
Wide Output Voltage Range of 2.5 V to 7.5 V Available
High Efficiency of 80% Typical
Surface Mount Package
ORDERING INFORMATION
Device
Output
Operating
Package
Voltage Type Temperature Range (Tape/Reel)
MC33463H–30KT1
MC33463H–33KT1
MC33463H–50KT1
MC33463H–30LT1
MC33463H–33LT1
MC33463H–50LT1
3.0 Int.
3.3 Switch
5.0
3.0 Ext. TA = –30° to +80°C
3.3 Switch
5.0 Drive
SOT–89
(Tape)
SOT–89
(Tape)
Other voltages from 2.5 V to 7.5 V, in 0.1 V increments are available. Consult factory for
information.
MC33463
VARIABLE FREQUENCY
MICROPOWER DC–to–DC
CONVERTER
SEMICONDUCTOR
TECHNICAL DATA
TAB
1
H SUFFIX
PLASTIC PACKAGE
CASE 1213
(SOT–89)
PIN CONNECTIONS
MC33463H–XXKT1
Ground 1
Output 2
Lx 3
(Top View)
Tab
(Tab is connected
to Pin 2)
MC33463H–XXLT1
Ground 1
Output 2
EXT 3
(Top View)
Tab
(Tab is connected
to Pin 2)
MOTOROLA ANALOG IC DEVICE DATA
www.DataSheet4U.com
© Motorola, Inc. 1999
Rev 1
1


Motorola Electronic Components Datasheet

MC33463 Datasheet

VARIABLE FREQUENCY MICROPOWER DC-to-DC CONVERTER

No Preview Available !

MC33463
Representative Block Diagrams
L
Vin 3
Lx
Cin
MC33463H–XXKT1
D
VLx Limitier
Drive
2 VO
Output
CO
VFM
Controller
100 kHz
Oscillator
Vref
1 Gnd
L MC33463H–XXLT1
Vin
Cin
D
Rb 3
Q Drive
EXT
VFM
Cb Controller
2 VO
Output
CO
100 kHz
Oscillator
Vref
1 Gnd
XX Denotes Output Voltage
This device contains 100 active transistors.
MAXIMUM RATINGS (TC = 25°C, unless otherwise noted.)
Rating
Symbol
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPower Supply Voltage (Transient)
VCC
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPower Supply Voltage (Operating)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁExternal Pin Voltage
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁLx Pin Voltage
VCC
VEXT
VLx
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁEXT Pin Source/Sink Current
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁLx Pin Sink Current
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPower Dissipation and Thermal Characteristics
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁH Suffix, Plastic Package Case 1213 (SOT–89)
IEXT
ILx
Value
12
8.0
–0.3 to VO
12
50/50
250
Unit
V
V
V
V
mA
mA
Maximum Power Dissipation @ TA = 25°C
Thermal Resistance, Junction–to–Air
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁOperating Junction Temperature
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁOperating Ambient Temperature
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁStorage Temperature Range
PD
RθJA
TJ
TA
Tstg
500
200
125
–30 to +80
–40 to +125
mW
°C/W
°C
°C
°C
2 MOTOROLA ANALOG IC DEVICE DATA


Part Number MC33463
Description VARIABLE FREQUENCY MICROPOWER DC-to-DC CONVERTER
Maker Motorola
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MC33463 Datasheet PDF






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