SC488 Semtech Corporation, SC488 Datasheet - Page 4

• Manufacturer Part Number: SC488
• Description: Complete DDR1/2/3 Memory Power Supply
• Manufacturer: Semtech Corporation

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© 2006 Semtech Corp.
POWER MANAGEMENT
Electrical Characteristics (Cont.)
Parameter
VDDQ Fault Protection
Under-Voltage Fault Delay
Under-Voltage Blank Time
Output Over-Voltage Fault
Over-Voltage Fault Delay
PGD Low Output Voltage
PGD Leakage Current
PGD UV Threshold
PGD Fault Delay
VCCA Under-Voltage (UVLO)
VTT Fault Protection
UV Lower Threshold
OV Upper Threshold
Fault Shutdown Delay
Thermal Shutdown
Inputs/Outputs
Logic Input Low Voltage
Logic Input High Voltage
Logic Input High Voltage
EN/PSV Input Resistance
VTTEN Leakage Current
Soft-Start
VDDQ Soft-Start Ramp Time
VTT Soft-Start Ramp Rate
FB Input Thresholds
FB Logic Input Low
FB Logic Input High
(4)(5)
(continued)
(6)
With Respect to FB Regulation Point
With Respect to FB Regulation Point
FB Above Over-Voltage Threshold
Falling Edge (Hysteresis 100 mV)
FB Forced Outside PGD Window
VTT Outside OV/UV Window
EN/PSV Low/Low (Disabled)
FB in Regulation, PGD = 5V
VTTEN Low (VTT Disabled)
VTTEN High (VTT Enabled)
VDDQ Set for 2.5V (DDR1)
VDDQ Set for 1.8V (DDR2)
EN/PSV High to PGD High
(Enabled, Psave Disabled)
(Enabled, Psave Enabled)
FB Forced Below UV V
EN/PSV High/High
EN/PSV Low/High
From EN High
VTT w/rt REF
VTT w/rt REF
Conditions
Sink 1mA
Sourcing
Sinking
TH
4
Min
VCCA
25°C
- 0.7
Typ
440
+16
+12
160
440
-10
-12
1.5
1.0
5.5
0.3
50
8
5
5
4
Max
3.70
-40°C to 85°C
Min
+12
150
-12
-16
1.2
2.4
3.1
+8
-1
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Max
4.35
+20
+16
170
0.1
1.2
0.6
2.4
+1
-8
-8
1
SC488
mV/μs
Units
clks
clks
clks
MΩ
μA
μA
μs
μs
μs
°C
%
%
%
%
V
V
V
V
V
V
V
(3)
(3)
(3)