Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

MC33998 Datasheet(PDF) 14 Page - Freescale Semiconductor, Inc

Part No. MC33998
Description  Switching Power Supply with Linear Regulators
Download  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC33998 Datasheet(HTML) 14 Page - Freescale Semiconductor, Inc

Back Button MC33998 Datasheet HTML 10Page - Freescale Semiconductor, Inc MC33998 Datasheet HTML 11Page - Freescale Semiconductor, Inc MC33998 Datasheet HTML 12Page - Freescale Semiconductor, Inc MC33998 Datasheet HTML 13Page - Freescale Semiconductor, Inc MC33998 Datasheet HTML 14Page - Freescale Semiconductor, Inc MC33998 Datasheet HTML 15Page - Freescale Semiconductor, Inc MC33998 Datasheet HTML 16Page - Freescale Semiconductor, Inc MC33998 Datasheet HTML 17Page - Freescale Semiconductor, Inc MC33998 Datasheet HTML 18Page - Freescale Semiconductor, Inc Next Button
Zoom Inzoom in Zoom Outzoom out
 14 / 20 page
background image
33998
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
14
Power-On Reset Timer
This timer starts to time out at the end of the soft-start period
if the VDDH and VDDL outputs are in the valid regulation range.
If the timer “times out”, then the open-drain PWROK signal is
released, indicating that “power is ON”.
Supervisory Circuits PWROK and VKAMOK
The 33998 has two voltage monitoring open-drain outputs,
the PWROK and the VKAMOK pins. PWROK is "active high".
This output is pulled low when either of the regulator outputs
(VDDH or VDDL) are below their regulation windows. If both
regulator outputs are above their respective lower thresholds,
and the Power-On Reset Timer has expired, the output driver is
turned off and this pin is at high-impedance state (see
Figure 6).
The VKAMOK signal indicates a severe fault condition on
the keep-alive regulator output VKAM. The VKAM output voltage
is compared to the internal bandgap reference voltage. When
the VKAM falls below the bandgap reference voltage level, the
VKAMOK signal is pulled low.
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20 


Datasheet Download

Go To PDF Page


Link URL




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

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   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