Datasheet

LM5033
www.ti.com SNVS181B –APRIL 2004–REVISED APRIL 2013
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, V
CC
= 10V applied externally, R
T
= 26.7kΩ, unless otherwise stated. See
(1)
and
(2)
.
Symbol Parameter Conditions Min Typ Max Units
CS delay to output Pin 8 taken from zero to 30 ns
0.6V. Time for Out1 or Out2
to fall to 90% of Vcc. CLoad
= 0 @ Out1, Out2
Current sink capability Pin 8 ≤ 0.3V 3 6 mA
(clocked)
Softstart (Pin 10)
Softstart current source 7 10 13 µA
Softstart to Comp offset 0.25 0.50 0.75 V
Open Circuit Voltage 5.0 V
Oscillator (Pin 9)
Fs1 Internal frequency Rt = 26.7 kΩ 175 200 225 kHz
Fs2 Internal frequency Rt = 8.2 kΩ 600 kHz
Vsync Sync threshold 3.2 3.8 V
R
t
/Sync DC voltage 2.0 V
PWM Comparator Input (Pin 3)
t
PWM
Gain from pin 3 to PWM 0.34 V/V
comparator
Maximum duty cycle at See PWM Comparator text 100 x (0.5T
S
- %
Out1, Out2 T
D
)/T
S
Minimum duty cycle at Pin 3 = 0V. 0 %
Out1, Out2
Open Circuit Voltage 4.2 5.2 6.2 V
Short circuit current Pin 3 = 0V 0.6 1.1 1.5 mA
Output Drivers (Pin 5, 6)
Deadtime (T
D
) CLoad = 0 @ OUT1, OUT2. 85 135 185 ns
Time measured from 10% of
falling output to 10% of rising
output.
Rise Time C
Load
= 1nF 16 ns
Fall Time C
Load
= 1nF 16 ns
Output High Voltage Iout = 50 mA (source) Vcc-0.75 Vcc-0.25 V
Output Low Voltage Iout = 100 mA (sink) 0.25 0.75 V
Max. source current 1.5 A
Max. sink current 1.5 A
Thermal Shutdown
T
SD
Shutdown temperature 165 °C
Shutdown temperature 15 °C
hysteresis
Thermal Resistance
θ
JA
Junction to Ambient DGS0010A Package 200 °C/W
DPR0010A Package 38
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