RH1086M
0.5A and 1.5A Low Dropout
Positive Adjustable Regulators
DESCRIPTION
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-
output differential and the dropout voltage is fully specified
as a function of load current. Dropout is guaranteed at a
maximum of 1.5V at maximum output current, decreasing
at lower load currents. On-chip trimming adjusts 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 Cor-
poration’s in-house Class S flow-to-yield circuits usable
in stringent military applications.
ABSOLUTE MAXIMUM RATINGS
(Note 1)
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
PRECONDITIONING
100% Thermal Limit Burn-In
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
BURN-IN CIRCUIT
RH1086M
15V
IN
ADJ
OUT
150Ω
RH1086 BI
–15V
CAPACITOR(S) NOT SHOWN
PACKAGE INFORMATION
BOTTOM VIEW
V
IN
2
CASE
IS OUTPUT
1
ADJ
K PACKAGE
2-LEAD TO-3 METAL CAN
H PACKAGE
3-LEAD TO-39 METAL CAN
2
INPUT
1
3
OUTPUT
(CASE)
BOTTOM VIEW
ADJ
FINAL SPECIFICATIONS SUBJECT TO CHANGE
Note: For ordering information contact LTC.
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RH1086M
TABLE 1: ELECTRICAL CHARACTERISTICS
PARAMETER
Reference Voltage
CONDITIONS
I
OUT
= 10mA, (V
IN
– V
OUT
) = 3V (K)
10mA ≤ I
OUT
≤ I
FULL LOAD
,
1.5V ≤ (V
IN
– V
OUT
) ≤ 25V
Line Regulation
Load Regulation
Dropout Voltage
Current Limit
I
LOAD
= 10mA, 1.5V ≤ (V
IN
– V
OUT
) ≤ 15V
(V
IN
– V
OUT
) = 3V,
10mA ≤ I
OUT
≤ I
FULL LOAD
ΔV
REF
= 1%, I
OUT
= 1.5A (K)
ΔV
REF
= 1%, I
OUT
= 0.5A (H)
(V
IN
– V
OUT
) = 5V (K)
(V
IN
– V
OUT
) = 5V (H)
(V
IN
– V
OUT
) = 25V (K)
(V
IN
– V
OUT
) = 25V (H)
6
2, 3
2, 3, 6
4
4
1.5
0.5
0.05
0.020
10
0.04
6
60
NOTES
1.238
1.225
(Preirradiation)
–55°C ≤ T
A
≤ 125°C
SUB-
MIN
TYP MAX GROUP
1.225
1
1
1
1
1
1
1
1
1
4
4
60
5,6
1.5
0.5
0.05
0.020
10
1.270
0.2
0.4
1.5
1.25
2,3
2,3
2,3
2,3
2,3
2,3
2,3
2,3
2,3
2,3
UNITS
V
V
%
%
V
V
A
A
A
A
mA
%/W
dB
T
A
= 25°C
SUB-
MIN
TYP MAX GROUP
1.262
1.270
0.2
0.3
1.5
1.25
1
Minimum Load Current (V
IN
– V
OUT
) = 25V
Thermal Regulation
T
A
= 25°C, 30ms Pulse
Ripple Rejection
,
f = 120Hz, C
ADJ
= 25μF
C
OUT
= 25μF Tantalum,
I
OUT
= I
FULL LOAD
, (V
IN
– V
OUT
) = 3V
T
J
= 25°C
10mA ≤ I
OUT
≤ I
FULL LOAD
,
1.5V ≤ (V
IN
– V
OUT
) ≤ 15V
T
A
= 125°C, 1000 Hours
10Hz ≤ f ≤ 10kHz
Control Circuitry (K)
Control Circuitry (H)
Power Transistor (K)
Power Transistor (H)
5
5
5
5
6
0.5
5
0.3
0.003
1.7
15.0
4.0
20.0
Adjust Pin Current
Adjust Pin Current
Change
Temperature Stability
Long Term Stability
RMS Output Noise
(% of V
OUT
)
Thermal Resistance
Junction-to-Case
55
120
5
1
1
0.5
120
5
2,3
2,3
μA
μA
%
%
%
°C/W
°C/W
°C/W
°C/W
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RH1086M
TABLE 1A: ELECTRICAL CHARACTERISTICS
PARAMETER
Reference Voltage
(Note 6)
Line Regulation
(Notes 2, 3)
Load Regulation
(Notes 2, 3, 6)
Dropout Voltage (Note 4)
Current Limit
CONDITIONS
10mA ≤ I
OUT
≤ I
FULL LOAD
1.5V ≤ (V
IN
– V
OUT
) ≤ 15V
I
OUT
= 10mA
1.5V ≤ (V
IN
– V
OUT
) ≤ 15V
(V
IN
– V
OUT
) = 3V
10mA ≤ I
OUT
≤ I
FULL LOAD
ΔV
REF
= 1%, I
OUT
= 1.5A (K)
ΔV
REF
= 1%, I
OUT
= 0.5A (H)
(V
IN
– V
OUT
) = 5V (K)
(V
IN
– V
OUT
) = 25V (K)
(V
IN
– V
OUT
) = 5V (H)
(V
IN
– V
OUT
) = 25V (H)
(V
IN
– V
OUT
) = 25V
1.5
0.05
0.5
0.020
10
120
5
10KRAD (Si)
MIN MAX
1.220 1.275
0.2
0.3
1.5
1.25
1.5
0.049
0.5
0.019
10
120
5
I
OUT
= 10mA (V
IN
– V
OUT
) = 3V (K) 1.234 1.262
(Postirradiation) T
A
= 25°C, unless otherwise noted.
50KRAD (Si)
MIN MAX
100KRAD (Si) 200KRAD (Si)
MIN MAX MIN MAX UNITS
V
V
%
%
V
V
A
A
A
A
10
120
5
mA
μA
μA
1.20
1.275
0.3
0.3
1.575
1.32
1.5
0.045
0.5
0.017
10
120
5
20KRAD (Si)
MIN MAX
1.230 1.262 1.225 1.262 1.220 1.262 1.205 1.262
1.219 1.275 1.215 1.275 1.210 1.275
0.21
0.3
1.51
1.26
1.5
0.048
0.5
0.019
10
120
5
0.23
0.3
1.52
1.27
1.5
0.047
0.5
0.018
0.25
0.3
1.55
1.29
Minimum Load Current
Adjust Pin Current
Adjust Pin Current Change 10mA ≤ I
OUT
≤ I
FULL LOAD
1.5V ≤ (V
IN
– V
OUT
) ≤ 15V
(Note 6)
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
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 3:
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 4:
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 5:
Guaranteed by design, characterization, or correlation to other
tested parameters.
Note 6:
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.
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RH1086M
TABLE 2: ELECTRICAL TEST REQUIREMENTS
MIL-STD-883 TEST REQUIREMENTS
Final Electrical Test Requirements (Method 5004)
Group A Test Requirements (Method 5005)
Group C and D End Point Electrical Parameters
(Method 5005)
*PDA applies to subgroup 1. See PDA Test Notes.
SUBGROUP
1*,2,3,4,5,6
1,2,3,4,5,6
1
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.
TOTAL DOSE BIAS CIRCUIT
15V
V
IN
RH1086M
ADJ
V
OUT
150Ω
–15V
RH1086 TA01
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RH1086M
TYPICAL PERFORMANCE CHARACTERISTICS
Reference Voltage
1.26
10mA ≤ I
OUT
≤ I
FULL LOAD
1.5V ≤ (V
IN
– V
OUT
) ≤ 15V
RIPPLE REJECTION (dB)
105
100
95
90
85
80
75
70
1.22
65
1
10
100
TOTAL DOSE – KRADS (Si)
1000
RH1086 G01
Ripple Rejection
CURRENT LIMIT (K PACKAGE) (A)
(V
IN
– V
OUT
) = 3V
I
OUT
= I
FULL LOAD
3.2
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1
10
100
TOTAL DOSE – KRADS (Si)
1000
RH1086 G02
Current Limit
(V
IN
– V
OUT
) = 5V
1.0
CURRENT LIMIT (H PACKAGE) (A)
OUTPUT VOLTAGE (V)
1.25
1.24
0.8
1.23
0.6
1
10
100
TOTAL DOSE – KRADS (Si)
1000
RH1086 G03
Current Limit
0.15
CURRENT LIMIT (K PACKAGE) (A)
(V
IN
– V
OUT
) = 25V
0.075
CURRENT LIMIT (H PACKAGE) (A)
0.3
Line Regulation
0.10
1.5V ≤ (V
IN
– V
OUT
) ≤ 15V
I
OUT
= 10mA
LOAD REGULATION (%)
0.05
Load Regulation
(V
IN
– V
OUT
) = 3V
10mA ≤ I
OUT
≤ 1.5A
LINE REGULATION (%)
0.14
0.070
0.2
0.13
0.065
0.1
0
0.12
0.060
0
–0.05
0.11
1
10
100
TOTAL DOSE – KRADS (Si)
0.055
1000
RH1086 G04
–0.1
–0.10
1
10
100
TOTAL DOSE – KRADS (Si)
1000
RH1086 G05
1
10
100
TOTAL DOSE – KRADS (Si)
1000
RH1086 G06
Dropout Voltage
1.6
I
OUT
= 1.5A
ADJUST PIN CURRENT (μA)
80
Adjust Pin Current
(V
IN
– V
OUT
) = 3V
10mA ≤ I
OUT
≤ I
FULL LOAD
MINIMUM LOAD CURRENT (mA)
1
10
100
TOTAL DOSE – KRADS (Si)
1000
RH1086 G08
Minimum Load Current
4
(V
IN
– V
OUT
) = 25V
DROPOUT VOLTAGE (V)
1.4
70
3
1.2
60
2
1.1
50
1
1.0
1
10
100
TOTAL DOSE – KRADS (Si)
1000
RH1086 G07
40
0
1
10
100
TOTAL DOSE – KRADS (Si)
1000
RH1086 G09
rh1086mfc
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 representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
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