sc1155csw.tr Semtech Corporation, sc1155csw.tr Datasheet - Page 7

• Manufacturer Part Number: sc1155csw.tr
• Description: Programmable Synchronous Dc/dc Hysteretic Controller With Vrm 9.0 Vid Range
• Manufacturer: Semtech Corporation

DYNAMIC ELECTRICAL CHARACTERISTICS
PRELIMINARY - August 7, 2000
Unless specified: 0 < T
PARAMETER
HYSTERETIC COMPARATORS
Propagation Delay Time
from
VSENSE to HIGHDR or
LOWDR (excluding
deadtime)
OUTPUT DRIVERS
HIGHDR rise/fall time
LOWDR rise/fall time
OVERCURRENT PROTECTION
Comparator Propagation
Delay Time
Deglitch Time (Includes
comparator propagation
delay time)
OVERVOLTAGE PROTECTION
Comparator Propagation
Delay Time
Deglitch Time (Includes
comparator propagation
delay time)
HIGH-SIDE Vds SENSING
© 2000 SEMTECH CORP.
Response Time
Short Circuit Protection
Rising Edge Delay
Sample/Hold Switch turn-
on/turn-off Delay
(2)
J <
125°C, VIN12V = 12V
(1)
SYMBOL
(1)
(1)
tr
(1)
t
tr
t
t
t
t
t
tf
VDSRESP
t
OCPROP
t
HCPROP
,
OVPROP
VDSRED
LOWDR ,
SWXDLY
tf
OCDGL
OVDGL
HIGHDR
LOWDR
HIGHDR
Cl = 9nF,
V
T
Cl = 9nF,
T
V
from 12v to 11.9v, 100ns rise
and fall times
V
from 4.5v to 4.4v, 100ns rise
and fall times
V
from 3.0v to 2.9v, 100ns rise
and fall times
10mV overdrive,
1.3V < Vref < 3.5V
PROGRAMMABLE SYNCHRONOUS
DC/DC HYSTERETIC CONTROLLER
WITH VRM 9.0 VID RANGE
BOOTLO
J
J
HISENSE
HISENSE
HISENSE
3v < V
V
= 125 °C
= 125 °C
LOSENSE
LOSENSE grounded
= 12v, V
= 4.5v, V
= 3v, V
= grounded,
CONDITIONS
HISENSE
= V
V
V
BOOT
DRV
HISENSE
< 11v
IOUTLO
IOUTLO
= 6.5v,
IOUTLO
= 6.5v,
pulsed
pulsed
pulsed
MIN
300
30
2
2
TYP
150
1
1
MAX
250
500
100
60
60
5
5
2
3
3
SC1155
UNITS
ns
ns
ns
µs
µs
µs
µs
µs
µs
µs
ns
ns
7