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.
+3.3 Volt, Low Dropout Positive Regulators
in Hermetic Packages
1.5 AMP AND 3 AMP LOW DROPOUT
3.3 VOLTAGE POSITIVE REGULATOR
OM7670 Series
OM7671 Series
1 11 R2
Supersedes 9 01 R1
Please see mechanical
outlines herein
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 OUTPUT CURRENT (AMP) PACKAGE
OM7670NK 1.5 TO-204AA
OM7671NK 3.0 TO-204AA
OM7670NM 1.3 Surface Mount - SMD1
OM7671NM 2.6 Surface Mount - SMD1
OM7670SM 1.3 Surface Mount - SMD3
OM7671SM 2.6 Surface Mount - SMD3
OM7670ST 1.3 TO-257AA Isolated Tab
OM7671ST 2.6 TO-257AA Isolated Tab
OM7670N2 .75 LCC-28
THERMAL RESISTANCE MAX POWER - WATTS
Package Style Junction to Case OM7670 Series OM7671 Series
LCC-28 20°C/Watt 5 ----
TO-257AA, SMD-1 and SMD-3 4.2°C/Watt 13 26
TO-204AA (TO-3) 3.0°C/Watt 15 30
Table 1
3.3
OM7670 Series
OM7671 Series
ELECTRICAL CHARACTERISTICS -55°C ≤TA≤125°C (unless otherwise specified)
Parameter Symbol Test Conditions Min. Max. Unit
Output Voltage VOUT VIN = 5.0 V, IOUT = 10 mA 3.267 3.333 V
TA= 25° C
4.75 V ≤VIN ≤18 V, •3.325 3.365 V
10 mA ≤IOUT ≤ILMIN
Line Regulation ∆VOUT 4.5V ≤VIN ≤18 V, •12 mV
(Note 1) ∆VIN IOUT = 0 A
Load Regulation ∆VOUT VIN = 5.0 V, 0A ≤IOUT ≤ILMIN 15 mV
(Note 1) ∆IOUT TA= 25° C
VIN = 5.0 V, 0A ≤IOUT ≤ILMIN •25 mV
Dropout Voltage VDO IOUT = ILMIN, ∆VREF = 1% •1.5 V
Thermal Regulation - 30 ms pulse, TA= +25° C 0.04 %/W
Ripple Rejection ∆VIN f = 120 Hz, CAdj = 25 µF, •60 dB
∆VOUT COUT = 25 µF (tantalum), IOUT = ILMIN,
VIN = 6.3 V
Quiescent Current IQVIN = 18 V •10 mA
Current Limit ILOM7670NK, VIN = 18 V •1.5 3.5
OM7670NM/ST/SM VIN = 18 V •1.3 2.5
OM7670N2, VIN = 18 V •.75 1.50 A
OM7671NK, VIN = 18 V •3.0 5.0
OM7671NM/ST/SM, VIN = 18 V •2.6 4.5
VIN = 28 V, All Types •.050 -- A
Temperature Stability ∆VOUT -55° C ≤TJ≤+125° C 1.55 %
(Note 2) ∆T
Long Term Stability ∆VOUT TA= +125° C, t = 1000 hrs 1.0 %
(Note 2) ∆T
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.
For more information on any of these mechanical outlines, please visit our web site at:
www.omnirel.com
.537
.527
.665
.645
.420
.410
.150
.140
.750
.500
.100 TYP.
.035
.025
.425
.200
.100
.350 MIN.
.080
.160
.020
± .020
.035 WIDE
FLAT 3 PLCS.
.115
.425
1
2
3
.140
.415
.157
.140
.075
.075
.062 .375
.030
MIN.
BOTTOM VIEW
12
3
.450
SQ.
.300
4 PLCS.
.050
24 PLCS
.305
SQ.
.02 x 45°
.090
MAX.
.05 X 45°
MAX. 3 PLCS.
.009 R.
28 PLCS.
.035
PIN 1
PIN 28
BOTTOMTOP SIDE
4
1
26
12
18
1.197
1.177
0.675
0.655
0.188 R.
MAX.
0.440
0.420
0.161
0.151
0.525 R.
MAX.
0.225
0.205
SEATING
PLANE
0.312
MIN.
0.450
0.250
0.043
0.038
2 PLCS.
0.135
MAX.
0.875
MAX.
1.53
REF.
MECHANICAL OUTLINES
OM7670ST/OM7671ST
OM7670NM/OM7671NM
OM7670SM/OM7671SM
OM7670N2 OM7670NK/OM7671NK
12 3
OM7670 Series
OM7671 Series
Pin 1 - Input
Pin 2 - Output
Case - Adjust
Pin 1 Input Pin 11 Output Pin 21 Input
Pin 2 Adjust Pin 12 Output Pin 22 Input
Pin 3 Adjust Pin 13 Adjust Pin 23 Input
Pin 4 Output Pin 14 Adjust Pin 24 Input
Pin 5 Output Pin 15 Input Pin 25 Input
Pin 6 Output Pin 16 Input Pin 26 Input
Pin 7 Output Pin 17 Input Pin 27 Input
Pin 8 Output Pin 18 Input Pin 28 Input
Pin 9 Output Pin 19 Input
Pin 10 Output Pin 20 Input
Pin Out
Pin 1 Ground
Pin 2 Vout
Pin 3 Vin
Pin Out
Pin 1 Vin
Pin 2 Ground
Pin 3 Vout
Pin Out
Pin 1 Ground
Pin 2 Vin
Pin 3 Vout
