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SC1155CSW 数据表(PDF) 4 Page - Semtech Corporation

部件名 SC1155CSW
功能描述  PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER WITH VRM 9.0 VID RANGE
PDF  19 Pages
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制造商  SEMTECH [Semtech Corporation]
网页  http://www.semtech.com
标志 SEMTECH - Semtech Corporation

SC1155CSW 数据表(HTML) 4 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
4
ELECTRICAL CHARACTERISTICS
Unless specified: 0 < T
J < 125°C, VIN = 12V
PARAMETER
SYMBO
L
CONDITIONS
MIN
TYP
MAX UNITS
Supply Voltage Range
VIN12V
11.4
12
13
V
Supply Current (Quiescent)
I
INq
INH = 5V, VID not 11111,
VIN above UVLO threshold during start-up,
f
SW = 200kHz, BOOTLO = 0V,
C
DH = CDL = 50pF
15
mA
High Side Driver Supply
Current (Quiescent)
I
BOOTq
INH = 0V or VID = 11111 or VIN below
UVLO threshold during start-up,
BOOT = 13V, BOOTLO = 0V
10
µA
INH = 5V, VID not 11111, VIN
above UVLO threshold during start-up,
f
SW = 200kHz, BOOT = 13V, BOOTLO = 0V,
C
DH = 50pF
5mA
REFERENCE/VOLTAGE IDENTIFICATION
Reference Voltage Accuracy
V
REF
11.4V < VIN12V < 12.6V, over full VID
range (see Output Voltage Table)
-1
1
%
VID0 - VID4 High Threshold
Voltage
V
TH(H)
2.25
V
VID0 - VID4 Low Threshold
Voltage
V
TH(L)
1V
POWER GOOD
Undervoltage Threshold
V
TH(PWRGD)
90
95
% V
REF
Output Saturation Voltage
V
SAT
I
O = 5mA
0.5
V
Hysteresis
V
HYS(PWRG
D)
10
mV
OVER VOLTAGE PROTECTION
OVP Trip Point
V
OVP
38
42
46
%V
OUT
Hysteresis
(1)
V
HYS(OVP)
10
mV
SOFT START
Charge Current
I
CHG
V
SS = 0.5V, resistance from VREFB pin to
AGND = 20k
Ω, V
REFB = 1.3V
Note: I
CHG = (IVREFB / 5)
10.4
13
15.6
µA
Discharge Current
Idischg
V
(S/S) = 1V
1
mA
INHIBIT COMPARATOR
Start Threshold
Vstart
INH
12.0
2.4
V
VIN12V UVLO
Start Threshold
Vstart
UVLO
9.25
10
10.75
V
Hysteresis
Vhys
UVLO
1.8
2
2.2
V



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