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| UM5482S8 Datasheet, PDF (4/6 Pages) Union Semiconductor, Inc. – Programmable Soft-Start | |||
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UM5482S8 Initial Spec
Electrical Characteristics
TA=25°C, VIN=12V (unless otherwise noted)
Parameter
Shutdown Supply Current
Supply Current
Feedback Voltage, VFB
Feedback Overvotage Threshold
Error Amplifier Transconductance,
GEA
High-Side Switch On Resistance
Low-Side Switch On Resistance
High-Side Switch Leakage Current
Upper Switch Current Limit
Lower Switch Current Limit
COMP to Current Sense
Transconductance, GCS
Oscillation Frequency, FOCS1
Short Circuit Oscillation Frequency,
FOCS2
Maximum Duty Cycle, DMAX
Minimum On Time
EN Shutdown Threshold Voltage
EN Shutdown Threshold Voltage
Hysteresis
EN Lockout Threshold Voltage
EN Lockout Hysteresis
Input Under Voltage Lockout
Threshold
Input Under Voltage Lockout
Threshold Hysteresis
Soft-Start Current
Soft-Start Period
Thermal Shutdown
Test Conditions
VEN=0V
VEN=2.0V, VFB=1.0V
4.5Vâ¤VINâ¤18V
Min
0.900
â³Ic=±10μA
VEN=0V, VSW=0V
Minimum Duty Cycle 2.4
From Drain to Source
305
VFB=0V
VFB=1.0V
VEN Rising
1.1
2.2
VIN Rising
3.80
VSS=0V
CSS=0.1μF
Typ
1
0.5
0.923
1.1
200
130
130
3.4
1.1
3.5
340
100
90
220
1.6
210
2.5
210
4.10
210
6
15
160
Max
3
0.8
0.946
10
375
2.0
2.7
4.40
Unit
μA
mA
V
V
μA/V
mΩ
mΩ
μA
A
A
A/V
kHz
kHz
%
ns
V
mV
V
mV
V
mV
μA
ms
°C
________________________________________________________________________
http://www.union-ic.com Rev.03 Sep.2016
4/6
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