SC493 Datasheet, PDF (4/28 Pages) Semtech Corporation – EcoSpeedTM Step-down Controller with I2C Interface

SC493
Electrical Characteristics (continued)
Parameter
Startup
Initialization Time ⁽²⁾
Soft-Start Time Accuracy
Power-on Delay Time Accuracy
Powersave
Zero-Crossing Detector Threshold
UPSV mode Frequency
Power Good
PGD Rising Threshold
PGD Falling Threshold
PGD Leakage
PGD Output Low Voltage
Fault Protection
Symbol
Condition
Min Typ Max Units
Delay before the I²C bus and the Power-on
t_INIT
delay ramp are enabled
t_SS
-20
t_DLY
-20
1
ms
+20
%
+20
%
VT_ZC
V_LX - PGND
-3
0
+3
mV
f_UPSV
UPSV enabled, UPSV1 = 1, UPSV0 = 1
20
25
30
kHz
VT_{PGD_RISE}
VT_{PGD_FALL}
ILEAK_PGD
V_{PGD_LOW}
FB with respect to set point, under voltage,
and over voltage
FB with respect to set point, under voltage,
and over voltage
Device operating, no fault, V_PGD=V_VDD(1)
I_PGD=3mA
90/120
%
80/110
%
1
µA
0.4
V
I_LIM Source Current
I_LIM Temperature Coefficient
I_LIM Comparator Offset
Output Under-Voltage Fault
Output Over-Voltage Fault
Over-Voltage Fault Delay⁽²⁾
Smart Power-save Protection Threshold⁽²⁾
Over-Temperature Shutdown
Over-Temperature Hysteresis
Analog Inputs and Outputs
I_LIM
TC_ILIM
VOFF_ILIM
VT_UV
VT_OV
t_{DLY_OV}
VT_SMRTPSV
T_OT
T_{OT_HYS}
V_OUT Input Resistance
R_VOUT
9
-10
FB with respect to set point,
8 consecutive switching cycles
FB with respect to set point rising/ falling
FB with respect to set point rising
Rising T_J
Controller enabled
Controller disabled/internal load enabled
10
11
μA
3000
ppm
0
+10 mV
70
%
120
%
5
μs
110
%
160
°C
10
°C
500k
Ω
10