MC33267 Datasheet, PDF (1/8 Pages) ON Semiconductor – LOW DROPOUT REGULATOR with POWER-UP RESET

Order this document by MC33267/D
Low Dropout Regulator
The MC33267 is a positive fixed 5.0 V regulator that is specifically
designed to maintain proper voltage regulation with an extremely low
input–to–output voltage differential. This device is capable of supplying
output currents in excess of 500 mA and contains internal current limiting and
thermal shutdown protection. Also featured is an on–chip power–up reset
circuit that is ideally suited for use in microprocessor based systems.
Whenever the regulator output voltage is below nominal, the reset output is
held low. A programmable time delay is initiated after the regulator has
reached its nominal level and upon timeout, the reset output is released.
Due to the low dropout voltage specifications, the MC33267 is ideally
suited for use in battery powered industrial and consumer equipment where
an extension of useful battery life is desirable. This device is contained in an
economical five lead TO–220 type package.
• Low Input–to–Output Voltage Differential
• Output Current in Excess of 500 mA
• On–Chip Power–Up Reset Circuit with Programmable Delay
• Internal Current Limiting with Thermal Shutdown
• Economical Five Lead TO–220 Type Packages
Device
MC33267T
MC33267TV
MC33267D2T
ORDERING INFORMATION
Tested Operating
Temperature Range
TJ = –40 ° to +125°C
TJ = –40 ° to +105°C
Package
Plastic Power
Plastic Power
Surface Mount
MC33267
LOW DROPOUT
REGULATOR with
POWER–UP RESET
SEMICONDUCTOR
TECHNICAL DATA
Pin 1. VCC Input
2. Reset
3. Ground
4. Delay
5. Output
1
5
T SUFFIX
PLASTIC PACKAGE
CASE 314D
1
Representative Block Diagram
Input
1
Reference
1.25 V
Thermal
3.01
R
20 µA
Reset
0.03
R
+
R
Delay
Overcurrent
Detector
+
1.25 V
3.8 V
200
Ground 3
This device contains 37 active transistors.
MOTOROLA ANALOG IC DEVICE DATA
Output
5
Reset
2
Delay
4
5
TV SUFFIX
PLASTIC PACKAGE
CASE 314B
Heatsink surface connected to Pin 3.
1
5
D2T SUFFIX
PLASTIC PACKAGE
CASE 936A
(D2PAK)
Heatsink surface (shown as
terminal 6 in case outline
drawing) is connected to Pin 3.
© Motorola, Inc. 1996
Rev 1
1