SC1404(2003) Просмотр технического описания (PDF) - Semtech Corporation
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SC1404 Datasheet PDF : 27 Pages
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SC1404
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
CODE
CONDITIONS
MIN TYP MAX UNITS
REF Sink Current IREFSK
10mV rise in REF voltage
10
µA
REF Fault Lockout REFUV
Voltage
Falling edge
1.8
2.2
V
V+ Operating
Supply Current
V+ Standby
Supply Current
IVPOP
IVPSB
VL switched over to VOUT5, 5V SMPS on,
ILOAD5 = ILOAD3 = 0A, PSAVE# = 0V
V+ = 6V to 30V, both SMPS off, PSAVE# = 0V;
includes current into SHDN#
10
50
µA
300
V+ Shutdown
Supply Current
IVPSD
V+ = 6V to 30V, SHDN# = 0V
-1
3
15
Quiescent Power PQ
Consumption
SMPS enabled, No Load on SMPS
6
mW
FAULT DETECTION
Overvoltage Trip
Threshold
V3OV, V5OV
With respect to unloaded output voltage
7
10
15
%
Overvoltage-Fault
Propagation Delay
Output driven 2% above overvoltage trip V TH
1.5
µs
Output
Undervoltage
Threshold
V3UV, V5UV
With respect to unloaded output voltage
65
75
85
%
Output
Undervoltage
Lockout Time
V3UV TO
V5UV TO
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
V3RST
V5RST
With respect to unloaded output voltage, falling
-12
-9
-5
%
edge; typical hysteresis = 1%
RESET#
Propagation Delay
Falling edge, output driven 2% below RESET# trip
1.5
µs
threshold
RESET# Delay
Time
T3RSDL
T5RSDL
With respect to fOSC
27,000 32,000 37,000 clks
INPUTS AND OUTPUTS
Logic Input Low
Voltage
VIO3, VIOP,
VIO5, VIOSD,
VIOSN
ON3, PSAVE#, ON5, SHDN#, SYNC
(SEQ = REF)
0.6
V
Logic Input High VIH3, VIHP,
ON3, PSAVE#, ON5, SHDN#, SYNC
2.4
V
Voltage
VIH5, VIHSD,
(SEQ = REF)
VIHSN
2003 Semtech Corp.
4
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