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參數(shù)資料
| 型號： | SC1155EVB |
| 廠商： | Semtech Corporation |
| 英文描述： | PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER WITH VRM 9.0 VID RANGE |
| 中文描述： | 可編程同步DC / DC控制器，電源模組采用滯回西元范圍9.0 |
| 文件頁數(shù)： | 4/19頁 |
| 文件大小： | 190K |
| 代理商： | SC1155EVB |
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
IN
q
INH = 5V, VID not 11111,
VIN above UVLO threshold during start-up,
f
SW
= 200kHz, BOOTLO = 0V,
C
DH
= C
DL
= 50pF
INH = 0V or VID = 11111 or VIN below
UVLO threshold during start-up,
BOOT = 13V, BOOTLO = 0V
15
mA
High Side Driver Supply
Current (Quiescent)
I
BOOT
q
10
μA
INH = 5V, VID not 11111, VIN
above UVLO threshold during start-up,
f
SW
= 200kHz, BOOT = 13V, BOOTLO = 0V,
C
DH
= 50pF
5
mA
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)
1
V
POWER GOOD
Undervoltage Threshold
V
TH(PWRGD)
V
SAT
V
HYS(PWRG
90
95
% V
REF
V
Output Saturation Voltage
I
O
= 5mA
0.5
Hysteresis
D)
10
mV
OVER VOLTAGE PROTECTION
OVP Trip Point
Hysteresis
(1)
V
OVP
V
HYS(OVP)
38
42
46
%V
OUT
mV
10
SOFT START
Charge Current
I
CHG
V
SS
= 0.5V, resistance from VREFB pin to
AGND = 20k
, V
REFB
= 1.3V
Note: I
CHG
= (I
VREFB
V
(S/S)
= 1V
10.4
13
15.6
μA
Discharge Current
Idischg
1
mA
INHIBIT COMPARATOR
Start Threshold
Vstart
INH
1
2.0
2.4
V
VIN12V UVLO
Start Threshold
Vstart
UVLO
Vhys
UVLO
9.25
10
10.75
V
Hysteresis
1.8
2
2.2
V
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