SC486EVB View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'SC486EVB' PDF : 26 Pages View PDF
SC486
POWER MANAGEMENT
Electrical Characteristics (Cont.)
Test Conditions: VBAT = 15V, VCCA = VDDP = VTTEN = EN/PSV = 5V, VDDQ = VTTIN = 1.8V, RTON = 1MΩ
Parameter
Conditions
25°C
-40°C to 125°C Units
Min Typ Max Min Max
VDDQ Controller
FB Error Comparator Threshold(1)
VCCA = 4.5V to 5.5V
1.500
1.485 1.515 V
On-Time
Minimum Off-Time
RTON = 1MΩ
460
RTON = 500kΩ, -10°C ≤ TA ≤ 125°C
265
RTON = 500kΩ, -40°C ≤ TA ≤ 125°C
400
390 530
225
305
ns
225 320
550 ns
VDDQS Input Resistance
150
kΩ
VDDQS Shutdown
EN/PSV = GND
22
Ω
Discharge Resistance
FB Leakage Current
-1.0 1.0 µA
VTT Controller
COMP Leakage Current
-1.0 1.0 µA
REF Source Current
10
mA
REF Output Accuracy
REF Shutdown
Discharge Resistance
VTT Output Accuracy
VTT Shutdown
Discharge Resistance
VTTS Leakage Current
IREF = 0 to 10mA
EN/PSV = GND
-2A < IVTT < 2A
EN/PSV = GND
900
882 918 mV
22
Ω
REF
-20 +20 mV
22
Ω
-1.0 1.0 µA
Current Sensing
ILIM Current
10
9
11
µA
Current Comparator Offset
PGND1 - ILIM
-10
10 mV
Zero-Crossing Threshold
PGND1 - LX, EN/PSV = 5V
5
mV
VDDQ Fault Protection
Current Limit (Positive)(2)
Current Limit (Negative)
PGND1 - LX, RILIM = 5kΩ
PGND1 - LX, RILIM = 10kΩ
PGND1 - LX, RILIM = 20kΩ
PGND1 - LX
50
100
200
-125
35
65 mV
80
120
170 230
-160 -90 mV
Output Under Voltage Fault
With respect to internal reference
-30
-35
-25
%
Under Voltage Fault Delay
FB forced below UV Vth
8
clks(3)
2006 Semtech Corp.
3
www.semtech.com
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