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SC473 Datasheet(PDF) 5 Page - Semtech Corporation

Part # SC473
Description  Single-Phase Single Chip Graphics Core Power Supply
PDF  18 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC473 Datasheet(HTML) 5 Page - Semtech Corporation

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© 2006 Semtech Corp.
www.semtech.com
SC473
POWER MANAGEMENT
Parameter
Condition
Min
Typ
Max
Units
Current Sensing (CS+, CS-) (Cont.)
Low-Pass Filter
Corner Frequency(1)
50
80
125
kHz
Current Limit Combined System (CLSET)
CL System Accuracy
CLSET = 1.2V, TG Low
28
52
mV
CLSET = 1.2V, TG High
16
32
CLSET Input Bias Current
|1|
μA
Hysteresis Setting (HYS)
HYS Input Bias Current
|1|
μA
HYS Gain (internal hysteresis
setting relative to voltage
applied at HYS pin)
HYS = 1V
4
7
10
%
OVP and Internal Powergood
Fixed Over-Voltage
Protection Threshold
1.65
1.7
1.75
V
Power Good Window
Upper Threshold
FB Rising Relative DAC
+160
+200
+240
mV
Power Good Window
Lower Threshold
FB Falling Relative DAC
-360
-300
-240
mV
Power Good Window
Lower Hysteresis
FB Rising Relative DAC
30
50
70
mV
Powergood (PWRGD)
Leakage
PWRGD
High Impedance V
PG = 5V
1
μA
On-Resistance
PWRGD = 0.1V
20
100
Ω
Power Monitor
PMON Output Voltage
VOUT = 1.2875
T
J = 25
o
C
CS+, CS- = 4mV
74
148
222
mV
CS+, CS- = 16mV
530
590
650
Electrical Characteristics (Cont.)



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