SC1403ITSTRT View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
SC1403ITSTRT Datasheet PDF : 31 Pages
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SC1403
POWER MANAGEMENT
PRELIMINARY
Absolute Maximum Ratings
Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters
specified in the Electrical Characteristics section is not implied.
PARAMETER
DESCRIPTION
MAXIMUM
UNITS
VDD, V+, PHASE3, PHASE5 to GND
Supply and Phase Voltages
-0.3 to +30
V
PHASE3, PHASE5 to GND
Phase Voltages
-2.0 (transient - 100 nsec)
V
BST3, BST5, DH3, DH5 to GND
Boost voltages
-0.3 to +36
V
PGND to GND
Power Ground to Signal Ground
± 0.3
V
VL to GND
Logic Supply
-0.3 to +6
V
BST3 to PHASE3; BST5 to PHASE5;
High-side Gate Drive Supply
-0.3 to +6
V
DH3 to PHASE3; DH5 to PHASE5
High-side Gate Drive Outputs
-0.3 to (+BSTx + 0.3)
V
DL3, DL5 to GND
CSL5, CSH5, CSL3, CSH3 to GND
Low-side Gate Drive Outputs
-0.3 to +(VL + 0.3)
V
and Current Sense inputs
REF, SYNC, SEQ, PSAVE#, ON5, RESET#,
VL, FB3, FB5, COMP3, COMP5 to GND
Logic inputs/outputs
-0.3 to +(VL + 0.3)
V
ON3, SHDN# to GND
-0.3 to +(V+ + 0.3V)
V
VL, REF Short to GND
Continuous
REF Current
+5
mA
VL Current
+50
mA
TJ
Package Thermal Resistance
Junction Temperature Range
junction to ambient
+150
76
°C
°C/Watt
TS
TL
Electrical Characteristics
Storage Temperature Range
-65 to +200
°C
Lead Temperature
+300 °C, 10 second max.
°C
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
MAIN SMPS CONTROLLERS
Input Voltage Range
6.0
30.0
V
FB3, FB5 range - Adjustable
Mode
V+ = 6.0 to 30V, CSLx = FBx,
Output Load = 0A to current limit
2.45 2.5 2.55
V
3.3V Output - Fixed Mode
V+ = 6.0 to 30V, FB3 = 0V,
3V Load = 0A to current limit
3.23 3.3 3.37
V
5V Output - Fixed Mode
V+ = 6.0 to 30V, FB5 = 0V,
5V Load = 0A to current limit
4.9 5.0 5.1
V
Output Voltage Adjust Range
Either SMPS
REF
5.5
V
Adjustable Mode Threshold
Measured at FB3/FB5
0.5 0.8 1.1
V
Load Regulation
Either SMPS, 0A to current limit
-0.4
%
Line Regulation
2004 Semtech Corp.
Either SMPS, 6.0V < V+ <30; PSAVE# = VL
2
0.05
United States Patent No. 6,377,032
www.semtech.com
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