參數(shù)資料
型號： SC471AMLTRT
廠商： Semtech Corporation
英文描述： Synchronous Buck Controller with Multi-Level VOUT Transition Support
中文描述： 同步降壓控制器具有多層次VOUT電源支持過渡
文件頁數(shù)： 4/27頁
文件大?。?/td> 634K
代理商： SC471AMLTRT
4
2006 Semtech Corp.
SC471/SC471A
www.semtech.com
POWER MANAGEMENT
Electrical Characteristics
(continued)
Parameter
Conditions
25°C
-40° to 85°C
Units
Min
Typ
Max
Min
Max
Regulation
Line Regulation Error
Typical Application Circuit
0.04
%/V
Load Regulation Error
Typical Application Circuit
0.3
%
Timing
On-Time
VOUT = 1.1V
250
225
275
ns
Minimum On-Time
100
ns
Minimum Off-Time
350
ns
Maximum Duty Cycle
V
BAT
= V
OUT
+ 0.2 FB < 0.7V
85
80
%
Soft-Start
Soft-Start Time
I
OUT
= I
LIM
/2
1000
μ
s
Analog Inputs/Outputs
VOUT Input Resistance
500
k
Ω
FB Input Bias Current
-1
+1
μ
A
Current Sense
Zero Crossing
Detector Threshold
LX - GND
0
-7
+7
mV
Power Good
Power Good Threshold
1% Hysteresis Typical
-20%
-17%
-23%
V
Threshold Delay Time
(1)
5
μ
s
Voltage Transition Blank Time
(1)
G0 or G1 Transition
32
clks
Leakage
1
μ
A
Fault Protection
ILIM Source Current
10
9
11
μ
A
ILIM Comparator Offset
0
-10
+10
mV
Current Limit (Negative)
LX - GND
80
60
100
mV
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