Datasheet

4
LT1086 Series
PARAMETER CONDITIONS MIN TYP MAX UNITS
Current Limit LT1086/-2.85/-3.3/-3.6/-5/-12 (V
IN
– V
OUT
) = 5V ● 1.50 2.00 2.8 A
(V
IN
– V
OUT
) = 25V ● 0.05 0.15 A
LT1086H (V
IN
– V
OUT
) = 5V ● 0.50 0.700 1.2 A
(V
IN
– V
OUT
) = 25V ● 0.02 0.075 A
Minimum Load Current LT1086/LT1086H (V
IN
– V
OUT
) = 25V (Note 4) ● 510 mA
Quiescient Current LT1086-2.85 V
IN
≤ 18V ● 510 mA
LT1086-3.3 V
IN
≤ 18V ● 510 mA
LT1086-3.6 V
IN
≤ 18V ● 510 mA
LT1086-5 V
IN
≤ 20V ● 510 mA
LT1086-12 V
IN
≤ 25V ● 510 mA
Thermal Regulation T
A
= 25°C, 30ms pulse 0.008 0.04 %/W
Ripple Rejection f = 120Hz, C
OUT
= 25µF Tantalum, I
OUT
= 1.5A, (I
OUT
= 0.5A for LT1086H)
LT1086, LT1086H C
ADJ
= 25µF, (V
IN
– V
OUT
) = 3V ● 60 75 dB
LT1086-2.85 V
IN
= 6V ● 60 72 dB
LT1086-3.3 V
IN
= 6.3V ● 60 72 dB
LT1086-3.6 V
IN
= 6.6V ● 60 72 dB
LT1086-5 V
IN
= 8V ● 60 68 dB
LT1083-12 V
IN
= 15V ● 54 60 dB
Adjust Pin Current LT1086, LT1086H T
J
= 25°C55µA
●120 µA
Adjust Pin Current LT1086, LT1086H 10mA ≤ I
OUT
≤ 1.5A, (0.5A for LT1086H) µA
Change 1.5V ≤ (V
IN
– V
OUT
) ≤ 15V ● 0.2 5
Temperature Stability ● 0.5 %
Long Term Stability T
A
= 125°C, 1000 Hrs. 0.3 1 %
RMS Output Noise T
A
= 25°C, 10Hz = ≤ f ≤ 10kHz 0.003 %
(% of V
OUT
)
Thermal Resistance H Package: Control Circuitry/Power Transistor 15/20 °C/W
Junction-to-Case K Package: Control Circuitry/Power Transistor 1.7/4.0 °C/W
M Package: Control Circuitry/Power Transistor 1.5/4.0 °C/W
T Package: Control Circuitry/Power Transistor 1.5/4.0 °C/W
The ● denotes the specifications which apply over the full operating
temperature range.
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. Load regulation is
measured at the output lead ≈1/8" from the package.
Note 2: Line and load regulation are guaranteed up to the maximum power
dissipation of 15W (3W for the LT1086H). Power dissipation is determined
by the input/output differential and the output current. Guaranteed
maximum power dissipation will not be available over the full input/output
range. See Short-Circuit Current curve for available output current.
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.
Note 4: Minimum load current is defined as the minimum output current
required to maintain regulation. At 25V input/output differential the device
is guaranteed to regulate if the output current is greater than 10mA.
ELECTRICAL CHARACTERISTICS