OM7670 Series
OM7671 Series
1.5 AMP AND 3 AMP LOW DROPOUT
3.3 VOLTAGE POSITIVE REGULATOR
+3.3 Volt, Low Dropout Positive Regulators
in Hermetic Packages
Please see mechanical
outlines herein
FEATURES
•
•
•
•
•
•
•
Low Dropout Voltage and Ground Currents
High Current Capability
Built-In Thermal Overload Protection
Short Circuit Current Limiting
Output Voltage Tolerance Guaranteed to + 1%
Available in Multiple Hermetic Package Styles
Output Current from .75A to 3.0A
DESCRIPTION
This series of +3.3 Voltage Regulators are high current, high accuracy, low dropout regulators
and well suited for systems where extremely low dropout voltages is critical. They feature full
protection against overcurrent faults, reversed input polarity, reversed lead insertion, over tem-
perature operation and positive and negative transient voltage spikes. They are available in a
number of hermetic package styles where critical environmental systems demand high per-
formance.
ABSOLUTE MAXIMUM RATINGS
@ 25°C
Operating Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Volts
Output Current - Package Dependent. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .See Below
Operating Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-55 to + 125 °C
Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-65 to + 150 °C
Lead Temperature, Soldering for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . + 150 °C
ORDERING INFORMATION - OM7670/71 SERIES
PART NUMBER
OM7670NK
OM7671NK
OM7670NM
OM7671NM
OM7670SM
OM7671SM
OM7670ST
OM7671ST
OM7670N2
OUTPUT CURRENT (AMP)
1.5
3.0
1.3
2.6
1.3
2.6
1.3
2.6
.75
PACKAGE
TO-204AA
TO-204AA
Surface Mount - SMD1
Surface Mount - SMD1
Surface Mount - SMD3
Surface Mount - SMD3
TO-257AA Isolated Tab
TO-257AA Isolated Tab
LCC-28
THERMAL RESISTANCE
Package Style
LCC-28
TO-257AA, SMD-1 and SMD-3
TO-204AA (TO-3)
1 11 R2
Supersedes 9 01 R1
MAX POWER - WATTS
OM7670 Series OM7671 Series
5
13
15
----
26
30
Junction to Case
20°C/Watt
4.2°C/Watt
3.0°C/Watt
Table 1
OM7670 Series
OM7671 Series
ELECTRICAL CHARACTERISTICS
Parameter
Output Voltage
Symbol
V
OUT
-55°C
≤
T
A
≤
125°C (unless otherwise specified)
Min.
3.267
Max.
3.333
Unit
V
Test Conditions
V
IN
= 5.0 V, I
OUT
= 10 mA
T
A
= 25° C
4.75 V
≤
V
IN
≤
18 V,
10 mA
≤
I
OUT
≤
I
LMIN
•
•
3.325
3.365
V
Line Regulation
(Note 1)
Load Regulation
(Note 1)
∆V
OUT
∆V
IN
∆V
OUT
∆I
OUT
4.5V
≤
V
IN
≤
18 V,
I
OUT
= 0 A
V
IN
= 5.0 V, 0A
≤
I
OUT
≤
I
LMIN
T
A
= 25° C
V
IN
= 5.0 V, 0A
≤
I
OUT
≤
I
LMIN
I
OUT
= I
LMIN
,
∆V
REF
= 1%
30 ms pulse, T
A
= +25° C
f = 120 Hz, C
Adj
= 25 µF,
C
OUT
= 25 µF (tantalum), I
OUT
= I
LMIN
,
V
IN
= 6.3 V
12
mV
15
mV
Dropout Voltage
Thermal Regulation
Ripple Rejection
V
DO
-
∆V
IN
∆V
OUT
•
•
•
60
25
1.5
0.04
mV
V
%/W
dB
Quiescent Current
Current Limit
I
Q
I
L
V
IN
= 18 V
OM7670NK, V
IN
= 18 V
OM7670NM/ST/SM V
IN
= 18 V
OM7670N2, V
IN
= 18 V
OM7671NK, V
IN
= 18 V
OM7671NM/ST/SM, V
IN
= 18 V
V
IN
= 28 V, All Types
•
•
•
•
•
•
•
10
1.5
1.3
.75
3.0
2.6
.050
3.5
2.5
1.50
5.0
4.5
--
1.55
mA
A
A
%
Temperature Stability
(Note 2)
Long Term Stability
(Note 2)
∆V
OUT
∆T
∆V
OUT
∆T
-55° C
≤
T
J
≤
+125° C
T
A
= +125° C, t = 1000 hrs
1.0
%
Notes:
1. Line and Load Regulation are measured at a constant junction temperature using a low duty cycle pulse technique.
Although power dissipation is internally limited, regulation is guaranteed up to the maximum power dissipation of 15W
for the OM7670 series and 30 watts for the OM7671 series (See Table 1). Power dissipation is determined by the
input/output differential voltage and the output current. Guaranteed maximum power dissipation will not be available over
the full input/output voltage range.
2. Guaranteed by design, characterization or correlation to other tested parameters.
3. The • denotes the specifications which apply over the full operating temperature range.
3.3
Microchip MCU
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