LM3940 View Datasheet(PDF) - Semelab - > TT Electronics plc
Part Name
Description
MFG CO.
'LM3940' PDF : 4 Pages View PDF
LM3940
Electrical Characteristics
Parameter
Test Conditions
VOUT Output Voltage
∆VOUT Line Regulation
∆VIN
∆VOUT Load Regulation 1
∆IOUT
5mA ≤ IL ≤ 1A
IL = 5mA
50mA ≤ IL ≤ 1A
ZO Output impedance
IQ Quiescent Current
en Output Noise Voltage
VO-VIN
Dropout Voltage2
IL (SC)
IL(DC) = 100mA, IL(AC) = 20mA(rms), f = 120Hz
4.5V VIN 5.5V, IL = 5mA
VIN 5V, IL = 5mA
BW = 10Hz-100kHz, IL = 5mA
IL = 1A
IL = 100A
RL = 0
Min
Typ
Max
Units
3.13
3.3
3.47
V
20
40
35
80
mV
35
mΩ
10
20
mA
110
250
150
µV (rms)
0.5
1.0
V
110
200
mV
1.2
1.7
A
Thermal Characteristics
Parameter
Thermal Resistance (Junction to Ambient)
And
Thermal Resistance (Junction to Case)3
Package Style
TO-204AA (TO-3)
TO-213AA (TO-66)
SMD05 (TO-276AA)
SMD1 (TO-276AB)
TO-257AA
TO-258AA
LCC4
LCC20
LCC28
RθJC
4.0 oC/W
4.5 oC/W
4.75 oC/W
4.75 oC/W
5.0 oC/W
4.5 oC/W
20 oC/W
25 oC/W
22 oC/W
RθJA
50 oC/W
55 oC/W
65 oC/W
65 oC/W
65 oC/W
55 oC/W
150 oC/W
165 oC/W
160 oC/W
1) Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating
the device outside of its rated operating conditions.
2) Dropout voltage is defined as the input-output differential voltage where the regulator output drops to a value that is 100 mV below
the value that is measured at VIN = 5V.
3) Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal
shutdown.
Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed
to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use.
Semelab encourages customers to verify that datasheets are current before placing orders.
Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.
E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk
Document Number 5282
Issue 1
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