LM3940
Electrical Characteristics
Parameter
V
OUT
Output Voltage
∆V
OUT
∆V
IN
∆V
OUT
∆I
OUT
Line Regulation
50mA
≤
I
L
≤
1A
Load Regulation
1
I
L(DC)
= 100mA, I
L(AC)
= 20mA(rms), f = 120Hz
4.5V V
IN
5.5V, I
L
= 5mA
Quiescent Current
V
IN
5V, I
L
= 5mA
Output Noise Voltage
V
O
-V
IN
Dropout Voltage
2
I
L
(SC)
BW = 10Hz-100kHz, I
L
= 5mA
I
L
= 1A
I
L
= 100A
R
L
= 0
1.2
110
150
0.5
110
1.7
1.0
200
250
µV
(rms)
V
mV
A
35
10
20
mA
mΩ
35
80
mV
5mA
≤
I
L
≤
1A
I
L
= 5mA
Test Conditions
Min
3.13
Typ
3.3
20
Max
3.47
40
Units
V
Z
O
Output impedance
I
Q
e
n
Thermal Characteristics
Parameter
Package Style
TO-204AA (TO-3)
TO-213AA (TO-66)
SMD05 (TO-276AA)
Thermal Resistance (Junction to Ambient)
And
Thermal Resistance (Junction to Case)
3
SMD1 (TO-276AB)
TO-257AA
TO-258AA
LCC4
LCC20
LCC28
θ
Rθ
JC
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
θ
Rθ
JA
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
SEME-LAB [ SEME LAB ]
