www.irf.com 1
Features
nLow Dropout Voltage and Ground Currents
nHigh Current Capability
nBuilt-in Thermal Overload Protection
nShort Circuit Current Limiting
nOutput Voltage Tolerance Guaranteed to ± 1%
nHermetic TO-204AA Package Ensures
High Reliability
nOutput Current 1.5A
nThis part is also available in
SMD-1 Package as OM7670NM
TO-257AA Package as OM7670ST(Isolated)
3-Pin Surface Mount (SMD-3) Package as OM7670SM
08/01/07
Description
Low Dropout Positive Voltage Regulator
OM7670NK
3.3V, 1.5A
This series of +3.3V voltage regulators are high current,
high accuracy, low dropout regulators and are well
suited for systems where low dropout voltages are
critical. These devices feature protection against
overtemperature, overcurrent, reverse polarity
conditions and voltage spikes. The TO-204AA hermetic
package meets the demand for military/defense
environments.
TO-204AA
P
ro
d
uc
t S
ummary
Part Number Output Voltage Output Current Package
OM7670NK 3.3V 1.5A TO-204AA
PD - 97298
Absolute Maximum Ratings @ TC = 25°C
Parameter Symbol Value Units
Output Current IO1.5 A
Input Voltage VIN 30 V
Power Dissipation PD15 W
Thermal Resistance, Junction to Case RθJC 3.0 °C/W
Operating Junction Temperature Range TJ -55 to +125
Storage Temperature Range TSTG -65 to +150 °C
Lead Temperature (Soldering 10 seconds maximum) TL 300
2www.irf.com
OM7670NK
Notes
Electrical Characteristics -55°C
d
TA
d
125°C (Unless Otherwise Specified)
Parameter Symbol Test Conditions Min. Max. Units
VIN = 5.0V, IOUT = 10mA, TA = 25°C 3.267 3.333
4.75V ≤ VIN ≤ 18V, 10mA ≤ IOUT ≤ ILMIN
e
3.235 3.365
Line Regulation
c
U
VOUT /
U
VIN 4.5V
d
VIN
d
18V, IOUT = 0 A
e
-12
VIN = 5.0V, 0A
d
IOUT
d
ILMIN, TA = 25°C -15
VIN = 5.0V, 0A
d
IOUT
d
ILMIN
e
-25
Dropout Voltage VDROP IOUT = ILMIN,
U
VREF = 1%
e
-1.5V
Thermal Regulation - Pulse Width = 30ms, TA = +25°C - 0.04 %/W
f = 120Hz, CAdj = 25
P
F,
COUT = 25
P
F (tantalum), IOUT = ILMIN
e
VIN = 6.3V
Quiescent Current IQVIN = 18V
e
-10mA
VIN = 8.3V
e
1.5 -
VIN =28V
e
0.050 -
Temperature Stability
d
U
VOUT /
U
T -55°C ≤ TJ ≤ +125°C -1.55
Long Term Stability
d
U
VOUT /
U
TT
A = +125°C, t = 1000hrs - 1.0
VOutput Voltage VOUT
U
VOUT /
U
IOUT
mV
Load Regulation
c
%
ACurrent Limit IL
dBRipple Rejection
U
VIN /
U
VOUT 60 -
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. Power dissipation is determined by the input/output differential voltage and 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. Specifications apply over the operating temperature range.
www.irf.com 3
OM7670NK
Dropout Voltage
Short Circuit Current Load Regulation
Fig 1: Typical Minimum Output
Differential Vs Output Current
Fig 2: Typical Short Circuit Current
Vs Input/Output Differential
Fig 3: Typical Output Voltage
Deviation Vs Temperature
4www.irf.com
OM7670NK
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
IR LEOMINSTER : 205 Crawford St., Leominster, Massachusetts 01453, USA Tel: (978) 534-5776
Data and specifications subject to change without notice. 08/2007
Part Numbering Nomenclature
Case Outline and Dimensions - TO-204AA
PIN ASSIGNMENTS
Pin 1 - Input
Pin 2 - Adjust
Case - Output
NOTES:
OM 7670 N K
Device Number
Isolated / Non-Isolated
N = Non-Isolated
Package Code
K = TO-204AA
