Datasheet

SM72485
SNVS697D –JANUARY 2011–REVISED APRIL 2013 www.ti.com
Electrical Characteristics (continued)
Specifications with standard typeface are for T
J
= 25°C, and those with boldface type apply over full Operating Junction
Temperature range. V
IN
= 48V, unless otherwise stated
(1)
.
Symbol Parameter Conditions Min Typ Max Units
Pre-charge switch voltage At 1 mA 0.8 V
Pre-charge switch on-time 150 ns
Current Limit
Current Limit Threshold 0.24 0.3 0.36 A
Current Limit Response Time I
switch
Overdrive = 0.1A 350 ns
Time to Switch Off
T
OFF-1
OFF time generator FB=0V, R
CL
= 100K 35 µs
T
OFF-2
OFF time generator FB=2.3V, R
CL
= 100K 2.56 µs
On Time Generator
T
ON
- 1 Vin = 10V 2.15 2.77 3.5 µs
Ron = 200K
T
ON
- 2 Vin = 95V 200 300 420 ns
Ron = 200K
Remote Shutdown Threshold Rising 0.40 0.70 1.05 V
Remote Shutdown Hysteresis 35 mV
Minimum Off Time
Minimum Off Timer FB = 0V 300 ns
Regulation and OV Comparators
FB Reference Threshold Internal reference 2.445 2.5 2.550 V
Trip point for switch ON
FB Over-Voltage Threshold Trip point for switch OFF 2.875 V
FB Bias Current 100 nA
Thermal Shutdown
Tsd Thermal Shutdown Temperature 165 °C
Thermal Shutdown Hysteresis 25 °C
Thermal Resistance
WSON Package 40
θ
JA
Junction to Ambient °C/W
VSSOP Package 200
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