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E-L4971D013TR Datasheet(PDF) 3 Page - STMicroelectronics

Part No. E-L4971D013TR
Description  1.5A STEP DOWN SWITCHING REGULATOR
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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L4971
Table 3. Absolute Maximum Ratings
Table 4. Thermal Data
(*) Package mounted on board.
3
ELECTRICAL CHARACTERISTCS
Symbol
Parameter
Value
Unit
Minidip
S016
V5
V11
Input voltage
58
V
V
4
V5,V6
Output DC voltage
-1
V
Output peak voltage at t = 0.1
µs f=200KHz
-5
V
I4
I5,I6
Maximum output current
int. limit.
V6-V5
V12-V11
14
V
V6
V12
Bootstrap voltage
70
V
V7
V13
Analogs input voltage (VCC = 24V
12
V
V2
V3
Analogs input voltage (VCC = 24V)
13
V
V8
V14
(VCC = 20V)
6
-0.3
V
V
Ptot
Power dissipation a Tamb
≤60°C
DIP8
1W
SO16
0.8
W
Tj,Tstg
Junction and storage temperature
-40 to 150
°C
Symbol
Parameter
DIP8
SO16
Unit
Rth(j-amb)
Thermal Resistance Junction to ambient
Max.
90 (*)
110 (*)
°C/W
Table 5. (Tj = 25°C, Cosc = 2.7nF, Rosc = 20kΩ, VCC = 24V, unless otherwise specified.)
* Specification Refered to Tj from 0 to 125°C
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
DYNAMIC CHARACTERISTIC
VI
Operating input voltage range
Vo = 3.3 to 50V; Io = 1.5A
*
8
55
V
Vo
Output voltage
Io = 0.5A
3.33
3.36
3.39
V
Io = 0.2 to 1.5A
3.292
3.36
3.427
V
Vcc = 8 to 55V
*
3.22
3.36
3.5
V
Vd
Dropout voltage
Vcc = 10V; Io = 1.5A
0.44
0.55
V
*0.88
V
Il
Maximum limiting current
Efficiency
Vcc = 8 to 55V
*
2
2.5
3
A
Vo = 3.3V; Io = 1.5A
85
%
fs
Switching frequency
*
90
100
110
KHz
SVRR
Supply voltage ripple rejection
Vi = Vcc+2VRMS; Vo = Vref;
Io = 1.5A; f ripple = 100Hz
60
dB
Voltage stability of switching
frequency
Vcc = 8 to 55V
3
6
%
Temp. stability of switching
frequency
Tj = 0 to 125°C
4
%




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