1
RH137
Negative Adjustable
Regulator
RH137
V
IN
2k
243
ADJ
RH137 BI
OUTPUT
40V
Power Dissipation ............................... Internally Limited
Input-to-Output Voltage Differential ......................... 40V
Operating Junction
Temperature Range ......................... 55C to 150C
Storage Temperature Range ................. 65
C to 150
C
Lead Temperature (Soldering, 10 sec) .................. 300
C
D
U
ESCRIPTIO
A
U
G
W
A
W
U
W
A
R
BSOLUTE
XI
TI
S
, LTC and LT are registered trademarks of Linear Technology Corporation.
W
U
U
PACKAGE/ORDER I FOR ATIO
BUR -I CIRCUIT
U
U
BOTTOM VIEW
ADJ
V
OUT
V
IN
CASE IS INPUT
H PACKAGE
3-LEAD TO-39 METAL CAN
1
2
3
2
1
V
OUT
CASE
IS V
IN
ADJ
K PACKAGE
2-LEAD TO-3 METAL CAN
(STEEL)
BOTTOM VIEW
The RH137 negative adjustable regulator will deliver up to
1.5A output current over an output voltage range of 1.2V
to 32V.
Every effort has been made to make these devices easy to
use and difficult to damage. Internal current and power
limiting coupled with true thermal limiting prevents device
damage due to overloads or shorts, even if the regulator is
not fastened to a heat sink.
Maximum reliability is attained with Linear Technology's
advanced processing techniques combined with a 100%
burn-in in the thermal limit mode. This assures that all
device protection circuits are working and eliminates field
failures experienced with other regulators that receive
only standard electrical testing.
The wafer lots are processed to Linear Technology's in-
house Class S flow to yield circuits usable in stringent
military applications.
2
RH137
T
A
= 25C
SUB-
SUB-
SYMBOL PARAMETER
CONDITIONS
NOTES
MIN
TYP
MAX
GROUP
MIN
TYP
MAX
GROUP
UNITS
V
REF
Reference Voltage
V
IN
V
OUT
= 5V, I
OUT
= 10mA
1.225
1.275
1
V
3V
V
IN
V
OUT
40V,
1.200
1.300
1
1.200
1.300
2,3
V
10mA I
OUT
I
MAX
, P P
MAX
V
OUT
Line Regulation
3V
V
IN
V
OUT
40V
2
0.02
1
0.05
2,3
%/ V
V
IN
V
OUT
Load Regulation
10mA I
OUT
I
MAX
,
V
OUT
5V
2
25
1
50
2,3
mV
I
OUT
10mA I
OUT
I
MAX
,
V
OUT
5V
2
0.5
1
1
2,3
%
Thermal Regulation
10ms Pulse
0.02
1
%/W
Ripple Rejection
V
OUT
= 10V, f = 120Hz, C
ADJ
= 0
60
dB
V
OUT
= 10V, f = 120Hz,
3
66
66
dB
C
ADJ
= 10F
I
ADJ
Adjust Pin Current
100
1
100
2,3
A
I
ADJ
Adjust Pin Current
10mA I
OUT
I
MAX
5
1
5
2,3
A
Change
3V
V
IN
V
OUT
40V
5
1
5
2,3
A
I
MIN
Minimum Load
V
IN
V
OUT
= 40V
5
1
5
2,3
mA
Current
V
IN
V
OUT
10V
3
1
3
2,3
mA
Current Limit
V
IN
V
OUT
15V H Package
0.5
1.5
1
0.5
2,3
A
K Package
1.5
3.2
1
1.5
2,3
A
V
IN
V
OUT
= 40V H Package
0.15
0.5
1
A
K Package
0.24
1.0
1
A
V
OUT
Temperature Stability 55C T
J
125C
3
0.6
%
Temp
V
OUT
Long Term Stability
T
A
= 125C
3
1
%
Time
e
n
RMS Output Noise
10Hz f 10kHz
0.003
%
JC
Thermal Resistance
H Package
3
15
C/W
(Junction to Case)
K Package
3
3
C/W
TABLE 1: ELECTRICAL CHARACTERISTICS
(Preirradiation) (Note 1)
55C T
A
150C
50KRAD(Si)
20KRAD(Si)
10KRAD(Si)
100KRAD(Si)
200KRAD(Si)
SYMBOL PARAMETER
CONDITIONS
NOTES MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
UNITS
V
REF
Reference Voltage
V
IN
V
OUT
5V,
1.225 1.275 1.225 1.275 1.225 1.275 1.225 1.275 1.22
1.28
V
I
OUT
= 10mA
3V
V
IN
V
OUT
40V,
1.2
1.3
1.2
1.3
1.2
1.3 1.2
1.3
1.2
1.3
V
10mA I
OUT
I
MAX
, P P
MAX
V
OUT
Line Regulation
3V
V
IN
V
OUT
40V,
2
0.02
0.02
0.02
0.02
0.02
%/V
V
IN
V
OUT
Load Regulation
10mA I
OUT
I
MAX
,
2
25
25
25
25
25
mV
I
OUT
V
OUT
5V
10mA I
OUT
I
MAX
,
2
0.5
0.5
0.5
0.5
0.5
%
V
OUT
5V
TABLE 1A: ELECTRICAL CHARACTERISTICS
(Postirradiation) (Note 4)
3
RH137
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
50KRAD(Si)
20KRAD(Si)
10KRAD(Si)
100KRAD(Si)
200KRAD(Si)
SYMBOL PARAMETER
CONDITIONS
NOTES MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
UNITS
I
ADJ
Adjust Pin Current
100
100
100
100
100
A
I
ADJ
Adjust Pin Current Change
10mA I
OUT
I
MAX
5
5
5
5
5
A
3V
V
IN
V
OUT
= 40V
5
5
5
5
5
A
I
MIN
Minimum Load Current
V
IN
V
OUT
= 40V
5
5
5
5
5
mA
V
IN
V
OUT
10V
3
3
3
3
3
mA
Current Limit H Package
V
IN
V
OUT
15V
0.5
1.5
0.5
1.5
0.5
1.5
0.5
1.5
0.5
1.5
A
V
IN
V
OUT
= 40V
0.15
0.5
0.15
0.5
0.15
0.5
0.15
0.5
0.15
0.5
A
K Package
V
IN
V
OUT
15V
1.5
3.2
1.5
3.2
1.5
3.2
1.5
3.2
1.5
3.2
A
V
IN
V
OUT
= 40V
0.24
1
0.24
1
0.24
1
0.24
1
0.24
1
A
TABLE 1A: ELECTRICAL CHARACTERISTICS
(Postirradiation) (Note 4)
Note 1: Unless otherwise specified, these specifications apply for
V
IN
V
OUT
= 5V
; and I
OUT
= 0.1A for the H package (TO-39) and
I
OUT
= 0.5A for the K package (TO-3) package. Although power dissipation
is internally limited, these specifications are applicable for power
dissipations of 2W for the TO-39 and 20W for the TO-3. I
MAX
is 0.2A for
the TO-39 and 1.5A for the TO-3 package.
Note 2: Regulation is measured at a constant junction temperature using
pulse testing with a low duty cycle. Changes in output voltage due to
heating effects are covered under the specification for thermal regulation.
Note 3: Guaranteed by design, characterization or correlation to other
tested parameters.
Note 4: T
J
= 25C unless otherwise noted.
MIL-STD-883 TEST REQUIREMENTS
SUBGROUP
Final Electrical Test Requirements (Method 5004)
1*,2,3
Group A Test Requirements (Method 5005)
1,2,3
Group C and D End Point Electrical Parameters
1
(Method 5005)
* PDA Applies to subgroup 1. See PDA Test Notes.
PDA Test Notes
The PDA is specified as 5% based on failures from group A, subgroup 1,
tests after cooldown as the final electrical test in accordance with method
5004 of MIL-STD-883 Class B. The verified failures of group A, subgroup
1, after burn-in divided by the total number of devices submitted for burn-
in in that lot shall be used to determine the percent for the lot.
Linear Technology Corporation reserves the right to test to tighter limits
than those given.
TABLE 2: ELECTRICAL TEST REQUIRE E TS
UW
TOTAL DOSE BIAS CIRCUIT
RH137
V
IN
243
2k
2
1
ADJ
15V
RH137 TDBC
OUTPUT
CASE
4
RH137
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
q
FAX
: (408) 434-0507
q
TELEX
: 499-3977
LINEAR TECHNOLOGY CORPORATION 1990
LT/HP 0896 500 REV A PRINTED IN USA
I.D. No. 66-10-0175 Rev. A 0896
TYPICAL PERFOR
M
A
N
CE CHARACTERISTICS
U
W
Reference Voltage
Current Limit
Adjust Current
Minimum Load Current
Dropout Voltage
Regulation
TOTAL DOSE KRAD (Si)
1
REFERENCE VOLTAGE (V)
1.28
1.27
1.26
1.25
1.24
1.23
1.22
10
100
1000
RH137 G01
3V
V
IN
V
OUT
40V
10mA
I
OUT
I
MAX
TOTAL DOSE KRAD (Si)
1
CURRENT LIMIT (A)
3.0
2.5
2.0
1.5
1.0
0.5
0
0.5
10
100
1000
RH137 G02
V
IN
V
OUT
= 5V
V
IN
V
OUT
= 40V
TOTAL DOSE KRAD (Si)
1
ADJUST CURRENT (
A)
100
90
80
70
60
50
40
10
100
1000
RH137 G03
V
IN
V
OUT
=
40V
TOTAL DOSE KRAD (Si)
1
MINIMUM LOAD CURRENT (mA)
3.0
2.5
2.0
1.5
1.0
0.5
0
10
100
1000
RH137 G04
V
IN
V
OUT
=
10V
TOTAL DOSE KRAD (Si)
1
DROPOUT VOLTAGE (V)
3.0
2.5
2.0
1.5
1.0
0.5
0
10
100
1000
RH137 G05
(V
IN
V
OUT
)
=
10V
TOTAL DOSE KRAD (Si)
1
REGULATION (mV)
14
12
10
8
6
4
2
0
10
100
1000
RH137 G06
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