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MC33466 Datasheet

FIXED FREQUENCY PWM MICROPOWER DC-to-DC CONVERTER

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Order this document by MC33466/D
Fixed Frequency PWM
Micropower DC-to-DC
Converter
The MC33466 series are micropower 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 15 µA typical.
The MC33466H–XXJT1 series features a highly accurate voltage
reference, an oscillator, a pulse width modulation (PWM) controller, a driver
transistor (Lx), an error amplifier and feedback resistive divider.
The MC33466H–XXLT1 is identical to the MC33466H–XXJT1, 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.
MC33466 Series Features:
Low Quiescent Bias Current of 15 µA
High Output Voltage Accuracy of ±2.5%
Low Startup Voltage of 0.9 V at 1.0 mA
Soft–Start = 500 µs
Surface Mount Package
ORDERING INFORMATION
Device
Output
Operating
Package
Voltage Type Temperature Range (Tape/Reel)
MC33466H–30JT1
MC33466H–33JT1
MC33466H–50JT1
MC33466H–30LT1
MC33466H–33LT1
MC33466H–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.
MC33466
FIXED FREQUENCY PWM
MICROPOWER DC–to–DC
CONVERTER
SEMICONDUCTOR
TECHNICAL DATA
TAB
1
H SUFFIX
PLASTIC PACKAGE
CASE 1213
(SOT–89)
PIN CONNECTIONS
MC33466H–XXJT1
Ground 1
Output 2
Lx 3
(Top View)
Tab
(Tab is connected
to Pin 2)
MC33466H–XXLT1
Ground 1
Output 2
EXT 3
(Top View)
Tab
(Tab is connected
to Pin 2)
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1999
Rev 4, 08/1999
1


Motorola Electronic Components Datasheet

MC33466 Datasheet

FIXED FREQUENCY PWM MICROPOWER DC-to-DC CONVERTER

No Preview Available !

MC33466
Representative Block Diagrams
Vin
Cin
L
3
Lx
MC33466H–XXJT1
D
VLx Limiter
Drive
PWM
Controller
50 kHz
Oscillator
Phase
Comp
Soft–Start
Vref
2
Output
(Voltage
Feedback)
VO
CO
1 Gnd
Vin
Cin
L
Rb 3
Q
EXT
Cb
MC33466H–XXLT1
D
Drive
PWM
Controller
100 kHz
Oscillator
Phase
Comp
Soft–Start
2
Output
(Voltage
Feedback)
Vref
1 Gnd
VO
CO
XX Denotes Output Voltage
This device contains 100 active transistors.
MAXIMUM RATINGS (TC = 25°C, unless otherwise noted.)
Rating
Symbol
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPower Supply Voltage (Transient)
VO
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPower Supply Voltage (Operating)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁExternal Pin Voltage
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁLx Pin Voltage
VO
VEXT
VLx
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁEXT Pin Source/Sink Current
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁLx Pin Sink Current
IEXT
ILx
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁPower Dissipation and Thermal Characteristics
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁH Suffix, Plastic Package Case 1213 (SOT–89)
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
NOTE: ESD data available upon request.
2 MOTOROLA ANALOG IC DEVICE DATA


Part Number MC33466
Description FIXED FREQUENCY PWM MICROPOWER DC-to-DC CONVERTER
Maker Motorola
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MC33466 Datasheet PDF






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