42095
NEGATIVE HIGH TEMPERATURE REGULATOR
Mii
MICROCIRCUITS DIVISION
Features:
Output current to 1.5 amps
Input voltage to -38V
Output voltage to –30V
Internal short circuit protection, foldback and
current limiting
Storage Temperature +250°C
200°C Operating temperature
Applications:
Logging while drilling
Measuring while drilling (down-hole applications)
Other harsh environments
Used as military and industrial devices
Designed for use in high temperature
environments
DESCRIPTION
The 42095 series of regulators covers the voltage range from -5 VDC through -30 VDC. These regulators are fabricated
using hybrid techniques and will operate at temperatures up to +200°C case. These devices are complete with internal short
circuit protection which includes voltage shutdown and current foldback. It is strongly recommended that input and output
capacitors be added as close to the case as possible. A 2µf capacitor should be added to the input and a minimum of 1.5 µf
should be added to the output. See typical connection diagram.
ABSOLUTE MAXIMUM RATINGS AT 200°C Case temperature
Output Current (I
OUT
) ............................................................................................................................................................. 1.5A
Input Voltage (V
IN
) .......................................................................................................................................................... -38VDC
Operating Temperature (T
C
)............................................................................................................................................... 200°C
Storage Temperature ......................................................................................................................................... –65°C to 200°C
Power Dissipation (P
d
) ........................................................................................................................................................... 25W
TABLE 1 (see note)
TYPE
42095-005
42095-012
42095-015
42095-018
42095-024
42095-030
Note:
V
OUT
VDC
-5
-12
-15
-18
-24
-30
MAX I
OUT
A
1.5
1.5
1.5
1.5
1.5
1.5
I
KNEE
TYP A
2.0
2.0
2.0
2.0
2.0
2.0
Under condition (V
IN
– V
OUT
x l
OUT)
25 watts at 200°C.
Micropac can provide custom output voltages between -5VDC and -30VDC.
Micropac Industries
cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.
Micropac
reserves the right to make changes at any time in order to improve design and to supply the best product possible.
MICROPAC INDUSTRIES, INC. MICROCIRCUITS PRODUCTS DIVISION
905 E. Walnut St., Garland, TX 75040
(972) 272-3571
Fax (972) 494-2281
www.micropac.com
E-MAIL:
microsales@micropac.com
1/6/06 Rev D
Pg. 1 of
3
42095
ELECTRICAL CHARACTERISTICS
PARAMETER
(1)
NEGATIVE HIGH TEMPERATURE REGULATOR
TEST CONDITIONS
TEMPERATURE
CASE TEMP
(2)
TYPICAL
Output Voltage
I
OUT
= 300 mA
V
IN
= V
OUT
+3VDC
+25°C to +200°C
V
OUT
± 1.0%
Line Regulation
(1)
V
IN
= V
OUT
+3VDC
to V
IN
= 38 V
I
OUT
= 50 mA
+25°C to +200°C
V
OUT
± 0.3%
Load Regulation
V
IN
= V
OUT
+5VDC
I
OUT
= 50 to 300mA
+25°C to +200°C
V
OUT
± 0.5%
Ripple Rejection at 120 Hz
V
IN
= V
OUT
+5VDC
V
IN
= V
OUT
+5VDC
I
OUT
= 0
+25°C
-60dB
Standby Current
+25°C
30mA
Short Circuit Current
V
IN
= V
OUT
+5VDC
V
IN
= V
OUT
+5VDC
V
IN
= V
OUT
+5VDC
V
IN
= V
OUT
+5VDC
V
IN
= V
OUT
+5VDC
I
OUT
= 300 mA
+25°C
400mA
Short Circuit Current
+200°C
200mA
Foldback Current (knee)
+25°C
2A
Foldback Current (knee)
+200°C
1.5A
Noise Output
+25°C
2mVRMS
Differential Voltage
* (
V= V
IN
– V
OUT
)
I
OUT
= 300 mA
+25°C to +200°C
3 VDC min
Notes:
1)
2)
V
IN
= 10V Min
Regulator operation guaranteed by design @ -25C for test condition listed. To designate factory
screening add a
“-1”
to the Micropac part number; i.e. 42095-015-1.
Micropac Industries
cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.
Micropac
reserves the right to make changes at any time in order to improve design and to supply the best product possible.
MICROPAC INDUSTRIES, INC. MICROCIRCUITS PRODUCTS DIVISION
905 E. Walnut St., Garland, TX 75040
(972) 272-3571
Fax (972) 494-2281
www.micropac.com
E-MAIL:
microsales@micropac.com
1/6/06 Rev D
Pg. 2 of
3
42095
NEGATIVE HIGH TEMPERATURE REGULATOR
Mechanical Configuration
Typical Connection Diagram
D1
HEADER
RECTIFIED
INPUT
Vin
CASE
2
Vout
REGULATED
OUTPUT
1
C in
0.1 uF
COMMON
Co
0.1 uF
Electrical Connection
Case
Pin 1
Pin 2
V
IN
Ground
V
OUT
C
IN
& C
O
:
Recommended as good analog design practice to ensure regulator stability.
These are in addition to supply and load capacitance.
Required if regulator is located more than 2” or 3” away from input supply or
output load capacitor(s). Capacitors must be installed as close to the regulator
Terminals as possible to ensure stability.
X5R & X7R type ceramic capacitors are recommended because of minimal
variation in value and ESR over temperature.
Micropac Industries
cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement.
Micropac
reserves the right to make changes at any time in order to improve design and to supply the best product possible.
MICROPAC INDUSTRIES, INC. MICROCIRCUITS PRODUCTS DIVISION
905 E. Walnut St., Garland, TX 75040
(972) 272-3571
Fax (972) 494-2281
www.micropac.com
E-MAIL:
microsales@micropac.com
1/6/06 Rev D
Pg. 3 of
3
嵌入式系统
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