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Электронный компонент: OM7764ASC

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Ultra Low Dropout, 3.0A
Adjustable Positive Linear Regulator 5962 - 0323801MYA
Thru-Hole (MO-078AA)
www.irf.com
1
08/06/03
MO-078AA
O M 7 764 AS C
Description
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
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.
Absolute Maximum Ratings
Parameter
Symbol
Value
Units
Output Currrent
I
O
3.0
A
Input Voltage
V
IN
+20
V
Power Dissipation @ Tc = 25C
P
D
20
W
Thermal Resistance, Junction to Case
R
JC
5.0
C/W
Operating Junction Temperature Range
T
J
-55 to +125
Storage Temperature Range
T
STG
-65 to +150
C
Lead Temperature Soldering (10second maximum)
T
L
300
Product Summary
Part Number
Output Voltage
Current
Dropout
OM7764ASC
1.21V to 20V
3.0A
0.4V
PD - 94749
2
www.irf.com
OM7764ASC
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.
Electrical Characteristics @T
A
= 25C (Unless Otherwise Specified)
Parameter
Test Conditions
Min.
Typ.
Max.
Units
Minimum Input voltage
I
LOAD
= 3.0A
Q
-
2.3
2.7
V
Line Regulation
V
IN
= 2.21V to 20V, I
LOAD
= 1.0mA
QR
-
2.0
10
V
IN
= 2.7V, I
LOAD
=1.0mA to 3.0A
-
5.0
10
mV
V
IN
= 2.7V, I
LOAD
=1.0mA to 3.0A
QR
-
-
50
V
IN
= 2.21V, I
LOAD
=1.0mA
1.192
1.210
1.228
2.7V < V
IN
< 20V, 1.0mA < I
LOAD
< 3.0A
Q
1.168
1.210
1.246
I
LOAD
= 1.0mA
-
0.02
0.05
I
LOAD
= 1.0mA
Q
-
-
0.10
I
LOAD
= 100mA
-
0.07
0.13
I
LOAD
= 100mA
Q
-
-
0.18
Dropout Voltage
I
LOAD
= 500mA
-
0.14
0.20
V
I
LOAD
= 500mA
Q
-
-
0.27
I
LOAD
= 1.5mA
-
0.25
0.33
I
LOAD
= 1.5mA
Q
-
-
0.40
I
LOAD
= 3.0A
-
0.4
0.54
I
LOAD
= 3.0A
Q
-
-
0.66
I
LOAD
= 0mA
Q
-
1.0
1.5
I
LOAD
= 1.0mA
Q
-
1.1
1.6
Ground Pin Current
I
LOAD
= 100mA
Q
-
3.5
5.0
mA
V
IN
= V
OUT
(Nominal)+1 I
LOAD
= 500mA
Q
-
11
18
I
LOAD
= 1.5A
Q
-
40
75
I
LOAD
= 3.0A
Q
-
120
200
Ripple Rejection
V
IN
- V
OUT
= 1.5V(Average), V
RIPPLE
= 0.5 V
P-P
55
65
-
dB
f
RIPPLE
= 120Hz, I
LOAD
= 1.5A, T
J
= +25C
Current Limit
V
IN
= 2.7V,
V
OUT
= -0.1V
Q
3.1
-
-
A
Input Reverse Leakage
V
IN
= -20V, V
OUT
= 0V
Q
-
-
1.0
mA
Current
Reverse Output Current
V
OUT
= 1.21V, V
IN
< 1.21V
Q
-
300
600
A
Load Regulation
Adjust Pin Voltage
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3
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
4
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OM7764ASC
Fig 5: Current Limit Vs Temperature
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: 220
F (+25V) Tantalum, 100
F (+25V)Tantalum, 0.1
F (+50V) Ceramic
Fig 6: Typical Application
V
OUT
= 1.21V(1 + (R2/R1)) + I
ADJ
(R2)
I
ADJ
= 3.0uA @ 25C
OM7764A
IN
OUT
ADJ
R2
R1
GND
0.1uF
100uF
SHDN
220uF
0.1uF
V
OUT
V
IN
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5
OM7764ASC
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
Case Outline and Dimensions
--
MO-078AA
1 2 3 4 5
Pin Assignment
Pin #
Pin Description
1
SHUTDOWN
2
INPUT
3
GROUND
4
OUTPUT
5
ADJUST
Part Numbering Nomenclature
OM
7764A
S
C
X
Omnirel
Device
S=Isolated
Package
Screening