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COM7905T COM7912T
COM7915T
(COTS) COMMERCIAL OFF-THE-SHELF FIXED V O LTAGE NEGATIVE REGULATORS IN TO-257
Three Terminal, Fixed Voltage, 1.5 Amp Precision Negative Regulators In Hermetic JEDEC TO-257AA Package
FEATURES
* * * * * * Isolated Hermetic Package, JEDEC TO-257AA Outline Output Voltages: -5V, -12V, - 5 1V Output Voltages Set Internally To 2% Built-In Thermal Overload Protection Short Circuit Current Limiting Standard Off-The-Shelf
DESCRIPTION
These three terminal negative regulators are supplied in a hermetically sealed metal package whose outline is similar to the industry standard TO-220 plastic package. All protective features are designed into the circuit, including thermal shutdown, current limiting and safe-area control. With heat sinking, they can deliver over 1.5 amps of output current. These units feature internally trimmed output voltages to 2% of nominal voltage. Standard voltages are -5V, -12V, and -15V. However, other voltages are available up to -24 volts. These units are ideally suited for Military applications where a hermetically sealed package is required.
ABSOLUTE MAXIMUM RATINGS @
25C
Input Voltage ................................................................. -35 V Operating Junction Temperature Range .......................... - 55C to + 150C Storage Temperature Range ..................................... - 65C to + 150C Typical Power/Thermal Characteristics: Rated Power @ 25 C TC .............................................. 17.5W TA ................................................. 3 W Thermal Resistance qJC ............................................ 4.2C/W qJA ............................................ 42C/W
33 .
8 09 R0
33 - 1 .
COM7900T Series
ELECTRICAL CHARACTERISTICS
Parameter Output Voltage Symbol VO U T V RLINE
-5 Vo l t
V IN = - 0 , Io = 500mA, -55C 1V
TA Min. -. 49
125C (unless otherwise specified) Max. -. 51 -. 52 12 Unit V V mV mV mV mV mV mV mV mV mA mA mA
Test Conditions TA = 25C V IN = -7.5V to -20V
* *
-. 48
Line Regulation (Note 1)
V IN = -7.5V to -20V V IN = -8.0V to -12V
25 5
*
Load Regulation (Note 1) I = 250mA to 750 mA O V RLOAD I = 5mA to 1.5 Amp O
12 20
* *
25 15 30 25 .
Standby Current Drain
I CD S DI C D S (ie Ln) DI C D S (Load) VD O I (pk) O IS D DV IN DV O U T NO DV O U T Dt DV O U T = 100mV, IO = 1.0A TA = 25C V IN = -35V I = 5mA to 1000mA O V IN = -7.0V to -20V
Standby Current Drain Change With Line Standby Current Drain Change With Load Dropout Voltage Peak Output Current SotCrutCret hr ici urn (Note 2) Ripple Rejection
* * * *
15 .
30 . 04 .
04 .
mA
25 . 33 . 12 .
V A A A dB dB
*
f = 2 H , DV IN = -10V 10 z (Note 3) TA = 25C, f =10 Hz to 100KHz TA = 25C, t = 1000 hrs. 63
28 .
*
60 40
Output Noise Voltage (Note 3) Long Term Stability (Note 3)
V/V RMS
75
mV
ELECTRICAL CHARACTERISTICS
Parameter Output Vo t g lae Symbol VO U T V RLINE
-12 Vot l
V IN = -19V, o = 500mA, -55C I
TA Min.
125C (unless otherwise specified) Max. -12.24 -24 1. 20 Unit V V mV mV mV mV mV mV mV mV mA mA mA
Test Conditions TA = 25C V IN = -14.5V to -27V
11.76
* *
-. 11 6
Line Regulation (Note 1)
V IN = -14.5V to -27V V IN = -16V to -22V
50 10
*
Load Regulation (Note 1) I = 250mA to 750 mA O V RLOAD I = 5mA to 1.5 Amp O
30 32
* *
60 16 30 35 .
Standby Current Drain
I CD S DI C D S (ie Ln) DI C D S (Load) VD O I (pk) O IS D DV IN DV O U T NO DV O U T Dt DV O U T = 100mV, O = 1.0A I TA = 2 , IO = 5mA to 1A 5C V I = -35V N I = 5mA to 1000mA O V IN = -14.5V to -27V
Standby Current Drain Change Wi h L n t ie Standby Current Drain Change W i h L a t od Dropout Vo t g lae Peak Output Current SotCrutCret hr ici urn
* * * *
15 .
40 . 08 .
05 .
mA
18 . 33 . 12 .
V A A A dB dB
33 .
(Note 2) Ripple Rejection f = 2 H , DV IN = -10V 10 z (Note 3) TA = 25C, f =10 Hz to 100KHz TA = 25C, t = 1000 hrs.
*
56
28 .
*
53 40
Output Noise Vo t g lae (Note 3) Long Te m S a i i y r tblt (Note 3)
V/V RMS
120
mV
Notes: 1 Load and Line Regulation are specified at a constant junction temperature. Pulse testing with low duty cycle is used. . Changes in output voltage due to heating effects must be taken into account separately. 2 S o t C r u t p o e t o i o l a s r d u t VIN = -35V. . hr ici rtcin s ny sue p o 3 I nttse,salb gaate t teseiidlmt. . f o etd hl e urned o h pcfe iis The * denotes the specifications which apply over the full operating temperature range.
33 - 2 .
COM7900T Series
ELECTRICAL CHARACTERISTICS
Parameter Output Voltage Symbol VO U T V RLINE
-15 Volt
V IN = - 3 , Io = 500mA, -55C 2V
TA Min.
125C (unless otherwise specified) Max. -53 1. -55 1. 25 Unit V V mV mV mV mV mV mV mV mV mA mA mA
Test Conditions TA = 25C V IN = -17.5V to -30V
-47 1.
* *
-45 1.
Line Regulation (Note 1)
V IN = -17.5V to -30V V IN = -20V to -26V
50 15
*
Load Regulation (Note 1) I = 250mA to 750 mA O V RLOAD I = 5mA to 1.5 Amp O
25 35
* *
75 21 45 60 .
Standby Current Drain
I CD S DI C D S (ie Ln) DI C D S (Load) VD O I (pk) O IS D DV IN DV O U T NO DV O U T Dt DV O U T = 100mV, IO = 1.0A TA = 25C V IN = -35V I = 5mA to 1000mA O V IN = -17.5V to -30V
Standby Current Drain Change With Line Standby Current Drain Change With Load Dropout Voltage Peak Output Current SotCrutCret hr ici urn (Note 2) Ripple Rejection
* * * *
15 .
65 . 08 .
05 .
mA
25 . 33 . 12 .
V A A A dB dB
*
f = 2 H , DV IN = -10V 10 z (Note 3) TA = 25C, f =10 Hz to 100KHz TA = 25C, t = 1000 hrs. 53
28 .
*
50 40
Output Noise Voltage (Note 3) Long Term Stability (Note 3)
V/V RMS
150
mV
Notes: 1 Load and Line Regulation are specified at a constant junction temperature. Pulse testing with low duty cycle is used. . Changes in output voltage due to heating effects must be taken into account separately. 2 S o t C r u t p o e t o i o l a s r d u t VIN = - 5 . . hr ici rtcin s ny sue p o 3V 3 I nttse,salb gaate t teseiidlmt. . f o etd hl e urned o h pcfe iis The * denotes the specifications which apply over the full operating temperature range.
TYPICAL PERFORMANCE CHARACTERISTICS
PEAK OUTPUT CURRENT
35 . 3 25 . 15 . 2
Tj = 25C I U T = 500mA O Tj = -55C
D P U VO AG RO O T LT E
25 . 10 0
RPL RJCIN IPE EETO
2
I U T = 1A O
8 0
V O U T = 5V
6 0
15 . 1
Tj = 150C
1
I = 0A OUT
4 0
V IN - V = 8VDC +3.5Vrms I = 1A OUT Tj = 25C
05 . 2 0
DV O U T = 100MV
05 .
DV O U T = 100mV
33 .
1k 0 10 0k
0 0 5 1 0 1 5 2 0 2 5 3 0 3 5
0 -5 -0 -5 75 2
0
2 5
5 0
7 10 15 10 50 25
0 1 0 10 0 1 k
Input To Output Differential (V)
Junction Temperature (C)
Frequency (Hz)
33 - 3 .
COM7900T Series
TYPICAL APPLICATIONS
Input bypass capacitors are recommended for stable operation of the OM7900 series of regulators over the input voltage and output current ranges. Output bypass capacitors will improve the transient response of the regulator. The bypass capacitors, (2.2F on the input, 1F on the output) should be ceramic or solid tantalum which have good high frequency characteristics. If aluminum electrolytics are used, their values should be 10F or larger. The bypass capacitors should be mounted with the shortest leads, and if possible, directly across the regulator terminals.
Fixed Output Regulator
VIN
Basic Current Regulator
VIN
3 COM79XX 1 +
2
VOUT
3
OM79XX 1
2
2.2F
1F +
2.2F
IQ
R1 IOU
VOUT + IQ IOUT = R1
MECHANICAL OUTLINE TO-257AA
.420 .410 .200 .190 .045 .035 .665 .645 .537 .527 .430 .410 .038 MAX.
PIN CONNECTION
Tab
.150 .140
33 .
.750 .500
.005
.035 .025
.100 TYP.
.120 TYP.
COM79XXT Isolated Front View P n 1 Ground i: P n 2 Input i: P n 3 Output i: Tab: Isolated
Note: *Case is metal/hermetically sealed *Isolated Tab/Glass Feedthroughs
1 23
205 Crawford Street, Leominster, MA 01453 USA (978) 534-5776 FAX (978) 537-4246

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