PD - 94749
Ultra Low Dropout, 3.0A
Adjustable Positive Linear Regulator
Thru-Hole (MO-078AA)
Product Summary
Part Number
OM7764ASC
O M 7 764 AS C
5962 - 0323801MYA
Output Voltage
1.21V to 20V
Current
3.0A
Dropout
0.4V
Description
The OM7764ASC is a 3.0A, ultra low dropout, ad-
justable linear regulator specifically designed for low
voltage, high current applications. Housed in a her-
metic package, the dropout of these devices is
400mV at full load. All protective features are de-
signed into the circuit including thermal shutdown,
current limiting and safe area control. These units
are ideally suited for military/defense, commercial
aircraft, industrial control and other harsh environ-
ments where a hermetically sealed package is re-
quired.
MO-078AA
Features:
■
Dropout Voltage of 400mV at Full Load
■
Wide Input Range: 2.7V to 20V
■
Low Noise: 40mVRMS ( 10Hz to 10KHz )
■
Fast Transient Response
■
No Protection Diodes needed
■
Hermetic MO-078AA Package ensures
High Reliability
Absolute Maximum Ratings
Parameter
Output Currrent
Input Voltage
Power Dissipation @ Tc = 25°C
Thermal Resistance, Junction to Case
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature Soldering (10second maximum)
Symbol
I
O
V
IN
P
D
R
θJC
T
J
T
STG
T
L
Value
3.0
+20
20
5.0
-55 to +125
-65 to +150
300
Units
A
V
W
°C/W
°C
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1
08/06/03
OM7764ASC
Electrical Characteristics @T
A
= 25°C (Unless Otherwise Specified)
Parameter
Minimum Input voltage
Line Regulation
Load Regulation
Adjust Pin Voltage
I
LOAD
= 3.0A
Q
∆V
IN
= 2.21V to 20V, I
LOAD
= 1.0mA
QR
V
IN
= 2.7V, I
LOAD
=1.0mA to 3.0A
V
IN
= 2.7V, I
LOAD
=1.0mA to 3.0A
QR
V
IN
= 2.21V, I
LOAD
=1.0mA
2.7V < V
IN
< 20V, 1.0mA < I
LOAD
< 3.0A
Q
I
LOAD
= 1.0mA
I
LOAD
= 1.0mA
Q
I
LOAD
= 100mA
I
LOAD
= 100mA
Q
Dropout Voltage
I
LOAD
= 500mA
I
LOAD
= 500mA
Q
I
LOAD
= 1.5mA
I
LOAD
= 1.5mA
Q
I
LOAD
= 3.0A
I
LOAD
= 3.0A
Q
I
LOAD
= 0mA
Q
I
LOAD
= 1.0mA
Q
Ground Pin Current
I
LOAD
= 100mA
Q
V
IN
= V
OUT
(Nominal)+1 I
LOAD
= 500mA
Q
I
LOAD
= 1.5A
Q
I
LOAD
= 3.0A
Q
Ripple Rejection
Current Limit
Input Reverse Leakage
Current
Reverse Output Current V
OUT
= 1.21V, V
IN
< 1.21V
Q
-
300
600
µA
V
IN
- V
OUT
= 1.5V(Average), V
RIPPLE
= 0.5 V
P-P
f
RIPPLE
= 120Hz, I
LOAD
= 1.5A, T
J
= +25°C
V
IN
= 2.7V,
∆V
OUT
= -0.1V
Q
V
IN
= -20V, V
OUT
= 0V
Q
3.1
-
-
-
-
1.0
A
mA
Test Conditions
Min.
-
-
-
-
1.192
1.168
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
55
Typ.
2.3
2.0
5.0
-
1.210
1.210
0.02
-
0.07
-
0.14
-
0.25
-
0.4
-
1.0
1.1
3.5
11
40
120
65
Max.
2.7
10
10
50
1.228
1.246
0.05
0.10
0.13
0.18
0.20
0.27
0.33
0.40
0.54
0.66
1.5
1.6
5.0
18
75
200
-
Units
V
mV
V
mA
dB
Footnotes
Q
- Denotes specifications which apply over the full operating temperature range.
R
- The OM7764ASC is tested and specified for these conditions with the ADJ pin connected to the OUT pin.
2
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OM7764ASC
Fig 1:
Dropout Voltage Vs Temperature
Fig 2:
Adjust Pin Voltage Vs Temperature
Fig 3:
Quiescent Current Vs Input Voltage
Fig 4:
Ground Pin Current Vs Input Voltage
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3
OM7764ASC
Fig 5:
Current Limit Vs Temperature
V
IN
IN
OM7764A
OUT
R2
ADJ
0.1uF
R1
V
OUT
SHDN
0.1uF
100uF
GND
220uF
V
OUT
= 1.21V(1 + (R2/R1)) + I
ADJ
(R2)
I
ADJ
= 3.0uA @ 25°C
Fig 6:
Typical Application
Layout Consideration
It is recommended that output capacitors be located as close as possible to the V
OUT
terminal of the
device to prevent any high frequency oscillation that may result due to excessive stray inductance.
Specfications for capacitors: 220µF (+25V) Tantalum, 100µF (+25V)Tantalum, 0.1µF (+50V) Ceramic
4
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OM7764ASC
Case Outline and Dimensions
—
MO-078AA
Pin Assignment
Pin #
1
2
3
12345
Pin Description
SHUTDOWN
INPUT
GROUND
OUTPUT
ADJUST
4
5
Part Numbering Nomenclature
OM
Omnirel
7764A
Device
S
S=Isolated
C
Package
X
Screening
WORLD HEADQUARTERS:
233 Kansas St., El Segundo, California 90245, Tel: (310) 252-7105
IR LEOMINSTER:
205 Crawford St., Leominster, Massachusetts 01453, Tel: (978) 534-5776
Data and specifications subject to change without notice.
08/03
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5
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