SC480EVB Просмотр технического описания (PDF) - Semtech Corporation
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SC480EVB Datasheet PDF : 25 Pages
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SC480
POWER MANAGEMENT
Electrical Characteristics (Cont.)
TEST CONDITIONS: VIN = 15V, VCCA = VDDP = VTTEN = EN/PSV = 5V, VDDQ = VTTIN = 1.8V, RTON = 1MΩ. TAMB = -40 TO +85C.
Parameter
Conditions
25°C
Min Typ Max
VDDQ Controller
FB Error Comparator Threshold(1)
VDDQS Regulation Threshold
On-Time
Minimum Off-Time
VDDQS Input Resistance
VDDQS Shutdown
Discharge Resistance
FB Leakage Current
VDDQ Smart Psave Threshold
VTT Controller
REF Source Current
REF Sink Resistance
REF Output Accuracy
Shutdown Discharge Resistance
(EN/PSV = GND)
VTT Output Accuracy
(with respect to REF)
VTTS Leakage Current
Current Sensing
ILIM Current
With Adjustable Resistor Divider
FB = AGND
FB = VCCA
RTON = 1MΩ, VDDQ = 1.8V
RTON = 500kΩ, VDDQ = 1.8V
FB < 0.3V
FB > 0.3V
EN/PSV = GND
IREF = 0 to 10mA
VTT
REF
-2A < IVTT < 2A(9)
DL High
1.500
2.5
1.8
460
265
425
80
91
16
8
50
900
0.25
8
0
10
Current Comparator Offset
PGND1 - ILIM
-40°C to 85°C
Min Max
1.485
2.475
1.782
368
212
1.515
2.525
1.818
552
318
550
-1.0 1.0
10
882 918
-40 +40
-1.0 1.0
9
11
-10
10
Units
V
V
V
ns
ns
kΩ
kΩ
Ω
μA
%
mA
kΩ
mV
Ω
Ω
mV
μA
μA
mV
Zero-Crossing Threshold
VDDQ Fault Protection
Current Limit (Positive)(2)
Current Limit (Negative)
PGND1 - LX, EN/PSV = 5V
PGND1 - LX, RLIM = 5kΩ
PGND1 - LX, RLIM = 10kΩ
PGND1 - LX, RLIM = 20kΩ
PGND1 - LX
5
50
100
200
-125
mV
35
65
80
120
mV
170 230
-160 -90
mV
Output Under-Voltage Fault
With Respect to FB Regulation Point
-30
-35 -25
%
© 2006 Semtech Corp.
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