Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

MC33267 Datasheet(PDF) 3 Page - ON Semiconductor

Part No. MC33267
Description  LOW DROPOUT REGULATOR with POWER-UP RESET
Download  8 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
Logo 

MC33267 Datasheet(HTML) 3 Page - ON Semiconductor

   
Zoom Inzoom in Zoom Outzoom out
 3 / 8 page
background image
MC33267
3
MOTOROLA ANALOG IC DEVICE DATA
+
0.1
Figure 1. Typical Application Circuit
Input
Output
1
5
Reference
1.25 V
Thermal
Overcurrent
Detector
Ground
3
1.25 V
Delay
R
0.03
R
3.01
R
20
µA
3.8 V
Reset
200
Reset
Output
2
Delay
4
+
+
+
Cin
Vin
100
CO
VO
CDLY
+
Sink Only
Positive True Logic
=
APPLICATION CIRCUIT INFORMATION
The MC33267 is a low dropout, positive fixed 5.0 V,
500 mA regulator. Protection features include output current
limiting and thermal shutdown. System protection consists of
an on–chip power–up microprocessor reset circuit.
A typical applications circuit is shown in Figure 1. The input
bypass capacitor (Cin) is recommended if the regulator is
located an appreciable distance (
≥ 4″) from the supply input
filter. This will reduce the circuit’s sensitivity to the input line
impedance at high frequencies.
These regulators are not internally compensated and thus
require an external output capacitor (CO) for stability. The
recommended capacitance is 100
µF with an equivalent
series resistance (ESR) of less than 0.3
Ω. A minimum
capacitance of 33
µF with a maximum ESR of 3.0 Ω can be
used in applications where space is a premium, however,
these limits must be observed over the entire operating
temperature range of the regulator circuit.
With economical electrolytic capacitors, cold temperature
operation can pose a serious stability problem. As the
electrolyte freezes, around – 30
°C, the capacitance will
decrease and the ESR will increase drastically, causing the
circuit to oscillate. Quality electrolytic capacitors with
extended temperature ranges of – 40
°C to + 85°C and
–55
°C to +105°C are readily available. It is suggested that
oven testing of the entire circuit be performed with maximum
load, minimum input voltage, and minimum ambient
temperature.
Figure 2 shows the reset circuit timing relationship. Note
that whenever the regulator’s output is less than 4.9 V, the
delay capacitor (CDLY) is immediately discharged, and the
reset output is held in a low state. As the regulator’s output
voltage increases beyond 4.97 V, the delay comparator will
allow the 20
µA current source to charge CDLY. The reset
output will go to a high state when CDLY crosses the 3.8 V
threshold of the reset comparator. The reset delay time is
controlled by the value selected for CDLY. The required
system reset time is governed by the microprocessor and
usually a reset signal which lasts several machine cycles is
sufficient.


Html Pages

1  2  3  4  5  6  7  8 


Datasheet Download



Related Electronics Part Number

Part NumberComponents DescriptionHtml ViewManufacturer
TA8004AS5V LOW DROPOUT REGULATOR WITH RESET TIMER 1 2 3 4 5 MoreToshiba Semiconductor
CS81515V 100mA Low Dropout Linear Regulator with WATCHDOG RESET & WAKE UP 1 2 3 4 5 MoreCherry Semiconductor Corporation
NJM2801Low Dropout Voltage Regulator with Reset 1 2 3 4 New Japan Radio
CS8151C5V 100mA Low Dropout Linear Regulator with Watchdog RESET & Wake Up 1 2 3 4 5 MoreCherry Semiconductor Corporation
LM2826Low Dropout Regulator with Delayed Reset 1 2 3 4 5 MoreNational Semiconductor (TI)
LM2925Low Dropout Regulator with Delayed Reset 1 2 3 4 5 MoreNational Semiconductor (TI)
LM2926Low Dropout Regulator with Delayed Reset 1 2 3 4 5 MoreNational Semiconductor (TI)
NJM2806Low Dropout Voltage Regulator with Reset 1 2 3 4 5 New Japan Radio
CS83615V Dual Micropower Low Dropout Regulator with ENABLE and RESET 1 2 3 4 5 MoreCherry Semiconductor Corporation

Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn