1
RH1086M
0.5A and 1.5A Low Dropout
Positive Adjustable Regulators
Note: For ordering information contact LTC.
2
1
V
IN
CASE 
IS OUTPUT
ADJ
K PACKAGE
2-LEAD TO-3 METAL CAN
BOTTOM VIEW
BOTTOM VIEW
H PACKAGE
3-LEAD TO-39 METAL CAN
3
2
1OUTPUT
(CASE)
ADJ
INPUT
PACKAGE I FOR ATIO
U UW
RH1086M
IN OUT
ADJ 150Ω
RH1086 BI
15V
–15V
CAPACITOR(S) NOT SHOWN
Power Dissipation.............................. Internally Limited
Input-to-Output Voltage Differential......................... 25V
Operating Junction Temperature Range
Control Section.............................. – 55°C to 150°C
Power Transistor ............................ – 55°C to 200°C
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
ARBSOLUTEXI T
I
S
The RH1086M positive adjustable regulator is designed to
provide 0.5A for the H package and 1.5A for the K package
with higher efficiency than currently available devices. All
internal circuitry is designed to operate down to 1V input-
to-output differential and the dropout voltage is fully
specified as a function of load current. Dropout is guaran-
teed at a maximum of 1.5V at maximum output current,
decreasing at lower load currents. On-chip trimming ad-
justs the output voltage to 1%. Current limit is also
trimmed, minimizing the stress on both the regulator and
power source circuitry under overload conditions.
The RH1086M is pin compatible with older 3-terminal
regulators. A 10µF output capacitor is required on this new
device. However, this is usually included in most regulator
designs.
The wafer lots are processed to Linear Technology
Corporation’s in-house Class S flow-to-yield circuits us-
able in stringent military applications.
BUR -I CIRCUIT
U U
, LTC and LT are registered trademarks of Linear Technology Corporation.
PRECONDITIONI G
UUU
100% Thermal Limit Burn-In
2
RH1086M
T
A
= 25
°
C SUB- SUB-
PARAMETER CONDITIONS NOTES MIN TYP MAX GROUP MIN TYP MAX GROUP UNITS
Reference Voltage I
OUT
= 10mA, (V
IN
– V
OUT
) = 3V (K) 1.238 1.262 1 V
10mA ≤ I
OUT
≤ I
FULL LOAD
, 5 1.225 1.270 1.225 1.270 2,3 V
1.5V ≤ (V
IN
– V
OUT
) ≤ 15V
Line Regulation I
OUT
= 10mA, 1.5V ≤ (V
IN
– V
OUT
) ≤ 15V 1,2 0.2 1 0.2 2,3 %
Load Regulation (V
IN
– V
OUT
) = 3V, 1,2,5 0.3 1 0.4 2,3 %
10mA ≤ I
OUT
≤ I
FULL LOAD
Dropout Voltage ∆V
REF
= 1%, I
OUT
= 1.5A (K) 3 1.5 1 1.5 2,3 V
∆V
REF
= 1%, I
OUT
= 0.5A (H)
Current Limit (V
IN
– V
OUT
) = 5V (K) 1.5 1 1.5 2,3 A
(V
IN
– V
OUT
) = 5V (H) 0.5 1 0.5 2,3 A
(V
IN
– V
OUT
) = 25V (K) 0.05 1 0.05 2,3 A
(V
IN
– V
OUT
) = 25V (H) 0.020 1 0.020 2,3 A
Minimum Load Current (V
IN
– V
OUT
) = 25V 10 1 10 2,3 mA
Thermal Regulation 30ms Pulse 0.04 4 %/W
Ripple Rejection f = 120Hz, C
ADJ
= 25µF, 5 60 4 60 5,6 dB
C
OUT
= 25µF Tantalum,
I
OUT
= I
FULL LOAD
(V
IN
– V
OUT
) = 3V
Adjust Pin Current 55 120 120 2,3 µA
Adjust Pin Current Change 10mA ≤ I
OUT
≤ I
FULL LOAD
, 5 5 1 5 2,3 µA
1.5V ≤ (V
IN
– V
OUT
) ≤ 15V
Temperature Stability 0.5 0.5 %
Long Term Stability T
A
= 125°C, 1000 Hours 4 0.3 %
RMS Output Noise 10Hz ≤ f ≤ 10kHz 0.003 %
(% of V
OUT
)
Thermal Resistance Control Circuitry (K) 4 1.7 °C/W
Junction-to-Case Control Circuitry (H) 4 15.0 °C/W
Power Transistor (K) 4 4.0 °C/W
Power Transistor (H) 4 20.0 °C/W
TABLE 1: ELECTRICAL CHARACTERISTICS (Preirradiation)
–55°C ≤ TA ≤ 125°C
Total Dose Bias Circuit
RH1086M
V
IN
V
OUT
ADJ 150Ω
RH1086 TA01
15V
–15V
3
RH1086M
TABLE 1A: ELECTRICAL CHARACTERISTICS (Postirradiation) TA = 25°C unless otherwise noted.
PARAMETER CONDITIONS MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX UNITS
Reference Voltage (Note 5) I
OUT
= 10mA (V
IN
– V
OUT
) = 3V (K) 1.234 1.258 1.230 1.257 1.225 1.253 1.220 1.247 1.205 1.241 V
10mA ≤ I
OUT
≤ I
FULL LOAD
1.220 1.275 1.219 1.275 1.215 1.275 1.210 1.275 1.20 1.275 V
1.5V ≤ (V
IN
– V
OUT
) ≤ 15V
Line Regulation (Notes 1, 2) I
OUT
= 10mA 0.2 0.21 0.23 0.25 0.3 %
1.5V ≤ (V
IN
– V
OUT
) ≤ 15V
Load Regulation (Notes 1, 2, 5) (V
IN
– V
OUT
) = 3V 0.3 0.3 0.3 0.3 0.3 %
10mA ≤ I
OUT
≤ I
FULL LOAD
Dropout Voltage (Note 3) ∆V
REF
= 1%, I
OUT
= 1.5A (K) 1.5 1.51 1.52 1.55 1.575 V
∆V
REF
= 1%, I
OUT
= 0.5A (H)
Current Limit (V
IN
– V
OUT
) = 5V (K) 1.5 1.5 1.5 1.5 1.5 A
(V
IN
– V
OUT
) = 25V (K) 0.05 0.049 0.048 0.047 0.045 A
(V
IN
– V
OUT
) = 5V (H) 0.5 0.5 0.5 0.5 0.5 A
(V
IN
– V
OUT
) = 25V (H) 0.020 0.019 0.019 0.018 0.017 A
Minimum Load Current (V
IN
– V
OUT
) = 25V 10 10 10 10 10 mA
Adjust Pin Current 120 120 120 120 120 µA
Adjust Pin Current Change 10mA ≤ I
OUT
≤ I
FULL LOAD
55 555µA
(Note 5) 1.5V ≤ (V
IN
– V
OUT
) ≤ 15V
10KRAD(Si) 20KRAD(Si) 50KRAD(Si) 100KRAD(Si) 200KRAD(Si)
Note 1: See thermal regulation specifications for changes in output voltage
due to heating effects. Line and load regulation are measured at a constant
junction temperature by low duty cycle pulse testing.
Note 2: Line and load regulation are guaranteed up to the maximum power
dissipation of 15W for RH1086MK and 3W for the RH1086MH. Power
dissipation is determined by the input/output differential voltage and the
output current. Guaranteed maximum power dissipation will not be
available over the full input/output voltage range.
Note 3: Dropout voltage is specified over the full output current range of
the device. Test points and limits are shown on the Dropout Voltage curve
in the LT®1086 data sheet.
Note 4: Guaranteed by design, characterization, or correlation to other
tested parameters.
Note 5: I
FULL LOAD
is defined in the Current Limit curves in the standard
data sheet. For compliance with 883 revision C current density
specifications, the RH1086MK is derated to 1A.
TABLE 2: ELECTRICAL TEST REQUIRE E TS
U W
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.
MIL-STD-883 TEST REQUIREMENTS SUBGROUP
Final Electrical Test Requirements (Method 5004) 1*,2,3,4,5,6
Group A Test Requirements (Method 5005) 1,2,3,4,5,6
Group C and D End Point Electrical Parameters 1
(Method 5005)
* PDA Applies to subgroup 1. See PDA Test Notes.
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 representation that the
interconnection of circuits as described herein will not infringe on existing patent rights.
4
RH1086M
LINEAR TECHNOLOGY CORPORATION 1995
LT/HP REV A 200 1097 PRINTED IN USA
I.D. No. 66-11-1086
TYPICAL PERFORMANCE CHARACTERISTICS
UW
Reference Voltage
TOTAL DOSE – KRADS (Si)
1
OUTPUT VOLTAGE (V)
1.26
1.25
1.24
1.23
1.22 10 100 1000
RH1086 G01
10mA ≤ IOUT ≤ IFULL LOAD
1.5V ≤ (VIN – VOUT) ≤ 15V
TOTAL DOSE – KRADS (Si)
1
CURRENT LIMIT (K PACKAGE) (A)
0.15
0.14
0.13
0.12
0.11
CURRENT LIMIT (H PACKAGE) (A)
0.075
0.070
0.065
0.060
0.055
10 100 1000
RH1086 G06
(V
IN
– V
OUT
) = 25V
Current Limit
TOTAL DOSE – KRADS (Si)
1
RIPPLE REJECTION (dB)
105
100
95
90
85
80
75
70
65 10 100 1000
RH1086 G04
(V
IN
– V
OUT
) = 3V
I
OUT
= I
FULL LOAD
Ripple Rejection
TOTAL DOSE – KRADS (Si)
1
CURRENT LIMIT (K PACKAGE) (A)
3.2
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
CURRENT LIMIT (H PACKAGE) (A)
1.0
0.8
0.6
10 100 1000
RH1086 G05
(V
IN
– V
OUT
) = 5V
Current Limit
TOTAL DOSE – KRADS (Si)
1
LINE REGULATION (%)
0.3
0.2
0.1
0
–0.1 10 100 1000
RH1086 G02
1.5V ≤ (V
IN
– V
OUT
) ≤ 15V
I
OUT
= 10mA
TOTAL DOSE – KRADS (Si)
1
LOAD REGULATION (%)
0.10
0.05
0
–0.05
–0.10 10 100 1000
RH1086 G03
(V
IN
– V
OUT
) = 3V
10mA ≤ I
OUT
≤ 1.5A
Minimum Load Current
Adjust Pin Current
TOTAL DOSE – KRADS (Si)
1
DROPOUT VOLTAGE (V)
1.6
1.4
1.2
1.1
1.0 10 100 1000
RH1086 G07
I
OUT
= 1.5A
Dropout Voltage
TOTAL DOSE – KRADS (Si)
1
ADJUST PIN CURRENT (µA)
80
70
60
50
40 10 100 1000
RH1086 G08
(V
IN
– V
OUT
) = 3V
10mA ≤ I
OUT
≤ I
FULL LOAD
TOTAL DOSE – KRADS (Si)
1
MINIMUM LOAD CURRENT (mA)
4
3
2
1
010 100 1000
RH1086 G09
(V
IN
– V
OUT
) = 25V
Load RegulationLine Regulation
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
(408) 432-1900
FAX: (408) 434-0507
●
TELEX: 499-3977
●
www.linear-tech.com