Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

CS8121YTFVA5 Datasheet(PDF) 5 Page - Cherry Semiconductor Corporation

Part # CS8121YTFVA5
Description  5V, 1A Linear Regulator with and ENABLE RESET
Download  8 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  CHERRY [Cherry Semiconductor Corporation]
Direct Link  http://www.cherrycorp.com/
Logo CHERRY - Cherry Semiconductor Corporation

CS8121YTFVA5 Datasheet(HTML) 5 Page - Cherry Semiconductor Corporation

  CS8121YTFVA5 Datasheet HTML 1Page - Cherry Semiconductor Corporation CS8121YTFVA5 Datasheet HTML 2Page - Cherry Semiconductor Corporation CS8121YTFVA5 Datasheet HTML 3Page - Cherry Semiconductor Corporation CS8121YTFVA5 Datasheet HTML 4Page - Cherry Semiconductor Corporation CS8121YTFVA5 Datasheet HTML 5Page - Cherry Semiconductor Corporation CS8121YTFVA5 Datasheet HTML 6Page - Cherry Semiconductor Corporation CS8121YTFVA5 Datasheet HTML 7Page - Cherry Semiconductor Corporation CS8121YTFVA5 Datasheet HTML 8Page - Cherry Semiconductor Corporation  
Zoom Inzoom in Zoom Outzoom out
 5 / 8 page
background image
If the input voltage rises above 30V (e.g. load dump), the
output shuts down. This response protects the internal cir-
cuitry and enables the IC to survive unexpected voltage
transients.
Using an emitter sense scheme, the amount of current
through the NPN pass transistor is monitored. Feedback
circuitry insures that the output current never exceeds a
preset limit.
Should the junction temperature of the power device
exceed 180ûC (typ) the power transistor is turned off.
Thermal shutdown is an effective means to prevent die
overheating since the power transistor is the principle
heat source in the IC.
The CS8121 contains two microprocessor compatible con-
trol functions:
and
(Figure 3).
Function
The
function switches the output transistor.
When the voltage on the
lead exceeds 2.9V typ,
the output pass transistor turns off, leaving a high
impedance facing the load. The IC will remain in Sleep
mode, drawing only 250µA, until the voltage on the lead
drops below 2.1V typ. Hysteresis (800mV) is built into the
function to provide good noise immunity.
Function
A
signal (low voltage) is generated as the IC pow-
ers up (VOUT > VOUT - 100mV) or when VOUT drops out of
regulation (VOUT < VOUT - 140mV, typ). 40mV of hysteresis
is included in the function to minimize oscillations.
The
output is an open collector NPN transistor,
controlled by a low voltage detection circuit. The circuit is
functionally independent of the rest of the IC, thereby
guaranteeing that the RESET signal is valid for VOUT as
low as 1V.
An external RC network on the
lead (Figure 4) pro-
vides a sufficiently long delay for most microprocessor
based applications. RC values can be chosen using the
following formula:
RTOT ´ CRST
where:
RTOT = RRST in parallel with RIN,
RIN
= µP port impedance,
CRST =
delay capacitor,
tDelay = desired delay time,
VRST = VSAT of
lead (0.7V @ turn - on), and
VT
= µP logic threshold voltage.
RESET
RESET
]
[
RESET
RESET
RESET
RESET
ENABLE
ENABLE
ENABLE
ENABLE
RESET
ENABLE
5
Regulator Control Functions
Figure 4. RC Network for
Delay
RESET
Circuit Description: continued
ÐtDelay
ln
)
VT Ð VOUT
VRST Ð VOUT
(
RESET
CS8121
VOUT
CRST
RRST
10
mF
tantalum
5V to
mP
and
System
Power
to
mP
RESET
Port
(1) = NO RESET DELAY CAPACITOR
(2) = WITH RESET DELAY CAPACITOR
FOR 7V < VIN < 26V
VOUT
VRT(ON)
ENABLE
VRT(OFF)
(1)
(2)
VIN
VIN(HI)
HI
LO
VR PEAK
VR SAT
VR PEAK
RESET
Figure 3. Circuit Waveforms for the CS8121


Similar Part No. - CS8121YTFVA5

ManufacturerPart #DatasheetDescription
logo
ON Semiconductor
CS8121YT5 ONSEMI-CS8121YT5 Datasheet
102Kb / 8P
   5V, 1A Linear Regulator
December, 2001 - Rev. 7
CS8121YTHA5 ONSEMI-CS8121YTHA5 Datasheet
102Kb / 8P
   5V, 1A Linear Regulator
December, 2001 - Rev. 7
CS8121YTVA5 ONSEMI-CS8121YTVA5 Datasheet
102Kb / 8P
   5V, 1A Linear Regulator
December, 2001 - Rev. 7
More results

Similar Description - CS8121YTFVA5

ManufacturerPart #DatasheetDescription
logo
Cherry Semiconductor Co...
CS8120 CHERRY-CS8120 Datasheet
198Kb / 8P
   5V, 300mA Linear Regulator with and ENABLE RESET
CS8140 CHERRY-CS8140 Datasheet
214Kb / 12P
   5V, 500mA Linear Regulator with ENABLE, , and Watchdog RESET
CS5112 CHERRY-CS5112 Datasheet
199Kb / 10P
   1.4A Switching Regulator with 5V, 100mA Linear Regulator with Watchdog, RESET and ENABLE
CS5111 CHERRY-CS5111 Datasheet
188Kb / 10P
   1.4A Switching Regulator with 5V, 100mA Linear Regulator with Watchdog, RESET and ENABLE
CS8101 CHERRY-CS8101 Datasheet
196Kb / 8P
   Micropower 5V, 100mA Low Dropout Linear Regulator with RESET and ENABLE
logo
Global Mixed-mode Techn...
G9105 GMT-G9105 Datasheet
404Kb / 9P
   5V 1A Low Dropout Regulator with Enable
logo
Cherry Semiconductor Co...
CS403 CHERRY-CS403 Datasheet
158Kb / 6P
   5V, 750mA Linear Regulator with RESET
CS8135 CHERRY-CS8135 Datasheet
180Kb / 8P
   5V, 5V Low Dropout Dual Regulator with /ENABLE RESET
logo
ON Semiconductor
CS8121 ONSEMI-CS8121 Datasheet
102Kb / 8P
   5V, 1A Linear Regulator
December, 2001 - Rev. 7
logo
Cherry Semiconductor Co...
CS8361 CHERRY-CS8361 Datasheet
169Kb / 6P
   5V Dual Micropower Low Dropout Regulator with ENABLE and RESET
More results


Html Pages

1 2 3 4 5 6 7 8


Datasheet Download

Go To PDF Page


Link URL




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

About Alldatasheet   |   Advertisement   |   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
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com