SEMICONDUCTOR
TECHNICAL DATA
VARIABLE FREQUENCY
MICROPOWER DC–to–DC
CONVERTER
H SUFFIX
PLASTIC PACKAGE
CASE 1213
(SOT–89)
PIN CONNECTIONS
Order this document by MC33463/D
TAB
1
(Tab is connected
to Pin 2)
1
2
3
(Top View)
Ground
Output
Lx
Tab
MC33463H–XXKT1
(Tab is connected
to Pin 2)
1
2
3
(Top View)
Ground
Output
EXT
Tab
MC33463H–XXLT1
1
MOTOROLA ANALOG IC DEVICE DATA
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
μ
A 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
μ
A
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
Voltage
Type
Operating
Temperature Range
Package
(Tape/Reel)
MC33463H–30KT1
MC33463H–33KT1
MC33463H–50KT1
3.0
3.3
5.0
Int.
S it h
Switch
TA= –30
to +80
°
°
C
SOT–89
(Tape)
MC33463H–30LT1
MC33463H–33LT1
MC33463H–50LT1
3.0
3.3
5.0
Ext.
S it h
Switch
D i
Drive
SOT–89
(Tape)
Other voltages from 2.5 V to 7.5 V, in 0.1 V increments are available. Consult factory for
information.
Motorola, Inc. 1999
Rev 1