E-L4960 Datasheet, PDF (3/16 Pages) STMicroelectronics – 2.5A POWER SWITCHING REGULATOR

THERMAL DATA
Symbol
Parameter
R_{th j-case}
R_{th 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
V_o Output voltage range
V_i = 46V
I_o = 1A
Vi
Input voltage range
Vo = Vref to 36V
Io = 2.5A
∆ Vo Line regulation
V_i = 10V to 40V V_o = V_ref I_o = 1A
∆ Vo Load regulation
V_o = V_ref
I_o = 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 I}o ^{= 1A}
Vd Dropout voltage
Io = 2A
I_om Maximum operating load V_i = 9V to 46V
current
Vo = Vref to 36V
I_7L Current limiting threshold V_i = 9V to 46V
(pin 7)
V_o = V_ref to 36V
ISH Input average current
Vi = 46V; output short-circuit
η
Efficiency
f = 100KHz
V_o = V_ref
Io = 2A
Vo = 12V
SVR Supply voltage ripple
rejection
∆ Vi = 2Vrms
fripple ^{= 100Hz}
V_o = V_ref
Io = 1A
f
Switching frequency
∆ f _{Voltage stability of}
∆ Vi switching frequency
Vi = 9V to 46V
∆ f _{Temperature stability of}
∆ Tj ^{switching frequency}
T_j = 0°C to 125°C
fmax Maximum operating
switching frequency
Vo = Vref
Io = 2A
Tsd Thermal shutdown
junction temperature
V_ref
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
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