SC1403ITSTRT View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'SC1403ITSTRT' PDF : 31 Pages View PDF
SC1403
POWER MANAGEMENT
PRELIMINARY
Electrical Characteristics (Cont.)
Unless otherwise noted: V+ = 15V, both PWMs on, SYNC = 0V, VL load = 0mA, REF load = 0mA, PSAVE# = 0V, TA =-40 to 85°C. Typical values are at
TA = +25°C. Circuit = Typical Application Circuit
Parameter
Conditions
Min Typ Max Units
REF Sink Current
REF Fault Lockout Voltage
V+ Operating Supply Current
V+ Standby Supply Current
V+ Shutdown Supply Current
Quiescent Power Consumption
FAULT DETECTION
10mV rise in REF
10
µA
Falling edge
1.8
2.2
V
VL switched over to VOUT5, both SMPS on,
ILoad3 = 0A, ILoad5 = 0A
10
50
µA
V+ = 6V to 30V, SMPS off,
300
includes current into SHDN#
V+ = 6V to 30V, SHDN# = 0V
-1
3
15
SMPS enabled, FB3 = FB5 = 0V,
No Load on SMPS
6
mW
Overvoltage Trip Threshold
With respect to unloaded output voltage
7
11
15
%
Overvoltage-Fault
Propagation Delay
Output driven 2% above overvoltage trip VTH
1.5
µs
Output Undervoltage Threshold
With respect to unloaded output voltage
65
75
85
%
Output Undervoltage Lockout
Time
From each SMPS enabled, with respect to f OSC 5000 6144 7000 clks
Thermal Shutdown Threshold
Typical hysteresis = +10°C
150
°C
RESET#
RESET# Trip Threshold
With respect to unloaded output voltage,
-12
-9
-5
%
falling edge; typical hysteresis = 1%
RESET# Propagation Delay
RESET# Delay Time
INPUTS AND OUTPUTS
Falling edge, output driven 2% below
RESET# trip threshold
With respect to fOSC
1.5
µs
27,000 32,000 37,000 clks
Feedback Input Leakage Current
FB3, FB5 = 2.6V
-1
Logic Input Low Voltage
ON3, PSAVE#, ON5, SHDN#, SYNC
(SEQ = REF)
Logic Input High Voltage
ON3, PSAVE#, ON5, SHDN#, SYNC
2.4
(SEQ = REF)
1
µA
0.6
V
V
2004 Semtech Corp.
4
United States Patent No. 6,377,032
www.semtech.com
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