Datasheet

Symbol Parameter Test Conditions Min. Typ. Max. Unit
DYNAMIC CHARACTERISTICS
V
o
Output voltage range V
i
= 46V I
o
=1A V
ref
40 V
V
i
Input voltage range V
o
=V
ref
to 36V I
o
= 2.5A 9 46 V
∆ V
o
Line regulation V
i
= 10V to 40V V
o
=V
ref
I
o
=1A 15 50 mV
∆V
o
Load regulation V
o
=V
ref
I
o
= 0.5Ato 2A 10 30 mV
V
ref
Internal reference voltage
(pin 2)
V
i
= 9V to 46V I
o
= 1A 5 5.1 5.2 V
∆ V
ref
∆ T
Average temperature
coefficient of refer voltage
T
j
=0°C to 125°C
I
o
=1A
0.4
mV/°C
V
d
Dropout voltage I
o
= 2A 1.4 3 V
I
om
Maximum operating load
current
V
i
= 9V to 46V
V
o
=V
ref
to 36V
2.5 A
I
7L
Current limiting threshold
(pin 7)
V
i
= 9V to 46V
V
o
=V
ref
to 36V
3 4.5 A
I
SH
Input average current V
i
= 46V; output short-circuit 30 60 mA
η Efficiency f = 100KHz V
o
=V
ref
75 %
I
o
=2A V
o
= 12V 85 %
SVR Supply voltage ripple
rejection
∆ V
i
=2V
rms
fripple
= 100Hz
V
o
=V
ref
Io = 1A
50 56 dB
f Switching frequency 85 100 115 KHz
∆ f
∆ V
i
Voltage stability of
switching frequency
V
i
= 9V to 46V 0.5 %
∆ f
∆ T
j
Temperature stability of
switching frequency
T
j
=0°C to 125°C
1%
f
max
Maximum operating
switching frequency
V
o
=V
ref
I
o
= 2A 120 150 KHz
T
sd
Thermal shutdown
junction temperature
150 °C
ELECTRICAL CHARACTERISTICS (Refer to the test circuit, T
j
=25°C, V
i
= 35V, unless otherwise
specified)
Symbol Parameter Value Unit
R
th j-case
Thermal resistance junction-case max 4 °C/W
R
th j-amb
Thermal resistance junction-ambient max 50 °
C/W
THERMAL DATA
3/15
L4960