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COM137T
(COTS) COMMERCIAL OFF-THE-SHELF 1.5 AMP NEGATIVE, ADJUSTABLE VOLTAGE REGULATOR IN TO-257 PKG
Three Terminal, Precision Adjustable Negative Voltage Regulator In TO-257 Package
FEATURES
* Built In Thermal Overload Protection * Short Circuit Current Limiting
DESCRIPTION
These three terminal negative regulators are supplied in hermetically sealed packages. All protective features are designed into the circuit, including thermal shutdown, current-limiting, and safe-area control. With heat sinking, these devices can deliver up to 1.5 amps of output current. The unit also features output voltages that can be fixed from -1.2 volts to -37 volts using external resistors.
ABSOLUTE MAXIMUM RATINGS Tc @
25C
Power Dissipation TO27 .................. ...... .... ........................... -5. . 20 W Input - Output Voltage Diffrnil.................................... 4 eeta 0 V Operating Junction Te p r t r R n e . . . . . . . . . . . . . . . . . . . . . - 5 t + 1 0 C meaue ag 5C o 5 Storage Te p r t r R n e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 6 t + 1 0 C meaue ag 5C o 5 Lead Te p r t r ( o d r n 1 s c n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . meaue Sleig 0 eod) . 300C T e m lR s s a c ,J n t o t C s : .............................. 4 2 C W hra eitne ucin o ae ./ Mxmm Otu Cret . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . aiu upt urn: 1.5 A Recommended Operating Conditions: Output Votg Rne . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 t lae ag -. o 37 VDC Ambient Operating Temperature Range (TA ) . . . . . . . . . . . . . . . . . . - 5 t + 5C o 125C Input Vo t g R n e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - . 5 t - 1 2 lae ag 42 o 4.5
3.3
33 - 1 .
COM137T
ELECTRICAL CHARACTERISTICS
Parameter Reference Voltage Symbol V REF
-55C
TA
125C, IL = 8mA (unless otherwise specified)
Test Conditions V DIFF OE= 3 0 , TA = 25C .V V DIFF OE= 3.0V V DIFF OE= 40V, TA = 25C V DIFF OE= 40V
Min. -1.275
Max. -1.225 -.0 12 -1.225 -.0 12 9 23 25 25 25 25 5
Unit
* *
40V
-.0 13 -1.275 -.0 13 9
V
Line Regulation (Note 1) Load Regulation (Note 1)
R LINE
3.0 V
V DIFF OE 40V, TA = 25C 3.0 V V DIFF OE
R LOAD
V DIFF OE= 5.0V, 8mA V DIFF OE= 12V, 8mA V DIFF OE= 40V, 8mA IL IL
IL
1.5A
* *
-3 2 -5 2 -5 2 -5 2
mV
1.5A, TA = 25C 200mA, TA = 25C IL 100mA
mV
V DIFF OE= 40V, 8mA Thermal Regulation V RTH
*
-5 2 5
V i = - 4 6 , IL = 1.5A 1.V n P d = 20 Watts, t = 10 ms, TA = 25C
mV
Ripple Rejection (Note 2) Adjustment Pin Current
RN
f = 120 Hz, Vout = Vrf e C Adj = 10 F
* * * * * * * * *
66
dB
Idj A
V DIFF OE= 3.0V V DIFF OE= 40V
100 100 5 5 5 5 30 . 30 . 50 . 15 . 0.24 35 . 12 . A mA A A A
Adjustment Pin Current Change Miminum Load Current
IAdj ( i e Ln) IAdj (Load) I Lmin
3.0V
V DIFF OE
40V IL 1.5A
V DIFF OE= 5V, 8mA
V DIFF OE= 3.0V, Vout = - . V ( o c d 14 fre) V DIFF OE= 10V, Vout = - . V ( o c d 14 fre) 14 fre) V DIFF OE= 40V, Vout = - . V ( o c d
CretLm u r n i it (Note 2)
I CL
V DIFF OE
5V
V DIFF OE= 40V, TA = 25C
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 I nttse,salb gaate t teseiidlmt. . f o etd hl e urned o h pcfe iis 3 The *denotes the specifications which apply over the full operating temperature range. .
MECHANICAL OUTLINE TO-257AA 3.3
.420 .410 .200 .190 .045 .035 .665 .645 .537 .527 .430 .410 .038 MAX.
PIN CONNECTION
.150 .140
Isolated Pn1 i : Adjust Pn2 i : Input Pn3 i : Output Tab: Isolated
.750 .500
.005
123
.100 TYP. .120 TYP.
.035 .025
205 Crawford Street, Leominster, MA 01453 USA (978) 534-5776 FAX (978) 537-4246

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