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SC1155CSW Arkusz danych(PDF) 7 Page - Semtech Corporation

Numer części SC1155CSW
Szczegółowy opis  PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER WITH VRM 9.0 VID RANGE
PDF  19 Pages
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Producent  SEMTECH [Semtech Corporation]
Strona internetowa  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC1155CSW Arkusz danych(HTML) 7 Page - Semtech Corporation

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SC1155
PROGRAMMABLE SYNCHRONOUS
DC/DC HYSTERETIC CONTROLLER
WITH VRM 9.0 VID RANGE
© 2000 SEMTECH CORP.
PRELIMINARY - August 7, 2000
7
DYNAMIC ELECTRICAL CHARACTERISTICS
Unless specified: 0 < T
J < 125°C, VIN12V = 12V
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
HYSTERETIC COMPARATORS
(1)
Propagation Delay Time
from
VSENSE to HIGHDR or
LOWDR (excluding
deadtime)
t
HCPROP
10mV overdrive,
1.3V < Vref < 3.5V
150
250
ns
OUTPUT DRIVERS
(2)
HIGHDR rise/fall time
tr
HIGHDR
,tfHIGHDR
Cl = 9nF,
V
BOOT = 6.5v,
V
BOOTLO = grounded,
T
J = 125 °C
60
ns
LOWDR rise/fall time
tr
LOWDR ,
tf
LOWDR
Cl = 9nF,
V
DRV = 6.5v,
T
J = 125 °C
60
ns
OVERCURRENT PROTECTION
(1)
Comparator Propagation
Delay Time
t
OCPROP
1µs
Deglitch Time (Includes
comparator propagation
delay time)
t
OCDGL
25
µs
OVERVOLTAGE PROTECTION
(1)
Comparator Propagation
Delay Time
t
OVPROP
1µs
Deglitch Time (Includes
comparator propagation
delay time)
t
OVDGL
25
µs
HIGH-SIDE Vds SENSING
(1)
Response Time
t
VDSRESP
V
HISENSE = 12v, VIOUTLO
pulsed
from 12v to 11.9v, 100ns rise
and fall times
2µs
V
HISENSE = 4.5v, VIOUTLO pulsed
from 4.5v to 4.4v, 100ns rise
and fall times
3µs
V
HISENSE = 3v, VIOUTLO pulsed
from 3.0v to 2.9v, 100ns rise
and fall times
3µs
Short Circuit Protection
Rising Edge Delay
t
VDSRED
LOSENSE grounded
300
500
ns
Sample/Hold Switch turn-
on/turn-off Delay
t
SWXDLY
3v < V
HISENSE < 11v
V
LOSENSE = VHISENSE
30
100
ns



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