PD - 94748A
Ultra Low Dropout, 3.0A
Adjustable Positive Linear Regulator
Surface Mount (SMD-6)
Product Summary
Part Number
OM7764ASM
O M 7 764 AS M
5962 - 0323801MXA
Output Voltage
1.21V to 20V
Current
3.0A
Dropout
0.4V
Description
The OM7764ASM is a 3.0A, ultra low dropout,
adjustable linear regulator specifically designed for
low voltage, high current applications. Housed in a
hermetic package, the dropout of these devices is
400mV at full load. All protective features are
designed 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 environments where
a hermetically sealed package is required.
SMD-6
Features:
n
Dropout Voltage of 400mV at Full Load
n
Wide Input Range: 2.7V to 20V
n
Low Noise: 40mVRMS ( 10Hz to 10KHz )
n
Fast Transient Response
n
No Protection Diodes needed
n
Hermetic SMD-6 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
10/25/06
OM7764ASM
Electrical Characteristics @T
A
= 25°C (Unless Otherwise Specified)
Parameter
Minimum Input voltage
Line Regulation
Load Regulation
Adjust Pin Voltage
I
LOAD
= 3.0A
∆V
IN
= 2.21V to 20V, I
LOAD
= 1.0mA
V
IN
= 2.7V, I
LOAD
=1.0mA to 3.0A
V
IN
= 2.7V, I
LOAD
=1.0mA to 3.0A
V
IN
= 2.21V, I
LOAD
=1.0mA
I
LOAD
= 1.0mA
I
LOAD
= 1.0mA
I
LOAD
= 100mA
I
LOAD
= 100mA
c
Test Conditions
Min.
-
-
-
-
1.192
1.168
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
55
3.1
-
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
-
-
300
Max.
2.7
10
15
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
-
-
1.0
600
Units
V
mV
cd
cd
2.7V < V
IN
< 20V, 1.0mA < I
LOAD
< 3.0A
c
c
c
c
c
Dropout Voltage
I
LOAD
= 500mA
I
LOAD
= 500mA
I
LOAD
= 1.5mA
I
LOAD
= 1.5mA
I
LOAD
= 3.0A
I
LOAD
= 3.0A
V
Ground Pin Current
V
IN
= V
OUT
(Nominal)+1
c
I
LOAD
= 0mA
c
I
LOAD
= 1.0mA
c
I
LOAD
= 100mA
c
I
LOAD
= 500mA
c
I
LOAD
= 1.5A
c
I
LOAD
= 3.0A
c
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
mA
Ripple Rejection
Current Limit
Input Reverse Leakage
Current
dB
A
mA
µA
V
IN
= 2.7V,
∆V
OUT
= -0.1V
V
IN
= -20V, V
OUT
= 0V
c
c
Reverse Output Current V
OUT
= 1.21V, V
IN
< 1.21V
c
-
Footnotes
- Denotes specifications which apply over the full operating temperature range.
- The OM7764ASM is tested and specified for these conditions with the ADJ pin connected to the OUT pin.
2
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OM7764ASM
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
OM7764ASM
Fig 5:
Current Limit Vs Temperature
V
IN
IN
OM7764A
OUT
R2
ADJ
R1
0.1uF
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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OM7764ASM
Case Outline and Dimensions
—
SMD-6
Pin Assignment
Pin #
1
2
3
4
5
6
Pin Description
INPUT
GROUND
OUTPUT
ADJUST
N/C
SHUTDOWN
Part Numbering Nomenclature
OM 7764A S
M
M
Screening
M = MIL-PRF-38535
Device Number
Package Code
M = SMD-6
Isolated / Non-Isolated
S = Isolated
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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.10/2006
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