L4960H データシートの表示（PDF） - STMicroelectronics
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L4960H Datasheet PDF : 16 Pages
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THERMAL DATA
Symbol
Parameter
Rth j-case
Rth j-amb
Thermal resistance junction-case
Thermal resistance junction-ambient
L4960
Value Unit
max
4
°C/W
max
50
°C/W
ELECTRICAL CHARACTERISTICS (Refer to the test circuit, Tj = 25 °C, Vi = 35V, unless otherwise
specified)
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
DYNAMIC CHARACTERISTICS
Vo Output voltage range
Vi = 46V
Io = 1A
Vi
∆ Vo
∆ Vo
Input voltage range
Line regulation
Load regulation
Vo = Vref to 36V
Io = 2.5A
Vi = 10V to 40V Vo = Vref Io = 1A
Vo = Vref
Io = 0.5A to 2A
Vref Internal reference voltage Vi = 9V to 46V
(pin 2)
Io = 1A
∆ Vref Average temperature
Tj = 0°C to 125°C
∆ T coefficient of refer voltage Io = 1A
Vd Dropout voltage
Io = 2A
Iom Maximum operating load Vi = 9V to 46V
current
Vo = Vref to 36V
I7L Current limiting threshold Vi = 9V to 46V
(pin 7)
Vo = Vref to 36V
ISH Input average current
Vi = 46V; output short-circuit
η
Efficiency
f = 100KHz
Vo = Vref
Io = 2A
Vo = 12V
SVR Supply voltage ripple
rejection
f
Switching frequency
∆ Vi = 2Vrms
fripple = 100Hz
Vo = Vref
Io = 1A
∆ f Voltage stability of
∆ Vi switching frequency
Vi = 9V to 46V
∆ f Temperature stability of
∆ Tj switching frequency
Tj = 0°C to 125°C
fmax Maximum operating
switching frequency
Vo = Vref
Io = 2A
Tsd Thermal shutdown
junction temperature
Vref
40
V
9
46
V
15
50
mV
10
30
mV
5
5.1 5.2
V
0.4
mV/°C
1.4
3
V
2.5
A
3
4.5
A
30
60
mA
75
%
85
%
50
56
dB
85 100 115 KHz
0.5
%
1
%
120 150
KHz
150
°C
3/16
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