LT1085CT-3.3 Linear Technology, LT1085CT-3.3 Datasheet - Page 4

• Manufacturer Part Number: LT1085CT-3.3
• Description: IC LDO REG 3A 3.3V TO-220-3
• Manufacturer: Linear Technology

Specifications of LT1085CT-3.3

• Regulator Topology: Positive Fixed
• Voltage - Output: 3.3V
• Voltage - Input: Up to 25V
• Voltage - Dropout (typical): 1.3V @ 3A
• Number Of Regulators: 1
• Current - Output: 3A
• Current - Limit (min): 3.2A
• Operating Temperature: 0°C ~ 150°C
• Mounting Type: Through Hole
• Package / Case: TO-220-3 (Straight Leads)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

ELECTRICAL CHARACTERISTICS
LT1083/LT1084/LT1085 Fixed
temperature range, otherwise specifications are at T
PARAMETER
Quiescient Current
Thermal Regulation
Ripple Rejection
Temperature Stability
Long Term Stability
RMS Output Noise
(% of V
Thermal Resistance
Junctrion-to-Case
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. Load and line 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 (60W for the LT1083, 45W for the LT1084 (K, P), 30W for the
LT1084 (T) and 30W for the LT1085). 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.
Note 4: I
curve is defined as the minimum value of current limit as a function of
input to output voltage. Note that the 60W power dissipation for the
LT1083 (45W for the LT1084 (K, P), 30W for the LT1084 (T), 30W for the
LT1085) is only achievable over a limited range of input to output voltage.
4
OUT
FULL LOAD
)
is defined in the current limit curves. The I
CONDITIONS
LT1084-3.3
LT1085-3.3
LT1085-3.6
LT1083/4/5-5
LT1083/4/5-12
LT1083-5/12
LT1084-3.3/5/12
LT1085-3.3/3.6/5/12
f = 120Hz, C
LT1084-3.3
LT1085-3.3
LT1085-3.6
LT1083/4/5-5
LT1083/4/5-12
T
T
10Hz = ≤ f ≤ 10kHz
Control Circuitry/Power Transistor (See Applications Information)
LT1083
LT1084
LT1085
A
A
= 125°C, 1000 Hrs.
= 25°C,
OUT
= 25μF Tantalum, I
V
V
V
V
V
T
f = 120Hz, C
f = 120Hz, C
f = 120Hz, C
V
V
K Package
P Package
K Package
P Package
T Package
K Package
T Package
DD Package
A
IN
IN
IN
IN
IN
IN
IN
= 25°C, 30ms pulse
= 18V
= 18V
= 18V
≤ 20V
≤ 25V
= 8V (Note 6)
= 15V (Note 6)
OUT
OUT
OUT
= 25μF Tantalum, I
= 25μF Tantalum, V
= 25μF Tantalum, V
OUT
A
FULLLOAD
= 25°C.
= I
FULLLOAD
The
●
denotes the specifications which apply over the full operating
(Note 4)
OUT
IN
IN
Note 5: 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 6: For LT1083 I
T
Note 7: 1.7V ≤ (V
Note 8: Dropout voltage 1.7V maximum for LT1084 at
– 55°C ≤ T
Note 9: Full load current is not available at all input-output voltages.
See Notes 3, 4, 6.
= 6.3V, I
= 6.6V, I
J
= 5A, V
≥ – 40°C.
IN
OUT
OUT
J
= 6.3V
≤ – 40°C.
= 3A
= 3A
IN
– V
FULL LOAD
OUT
) ≤ 25V for LT1084 at – 55°C ≤ T
●
●
●
●
●
●
●
●
●
●
●
is 5A for – 55°C ≤ T
MIN
60
60
60
60
54
0.002
0.003
0.004
0.003
0.03
TYP
5.0
5.0
5.0
5.0
5.0
0.5
72
72
72
68
60
J
≤ – 40°C and 7.5A for
0.75/2.3
0.65/2.3
0.65/2.7
0.6/1.6
0.5/1.6
0.9/3.0
0.7/3.0
0.7/3.0
0.010
0.015
0.020
MAX
10.0
10.0
10.0
10.0
10.0
1.0
J
≤ – 40°C.
UNITS
1083ffd
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
%/W
%/W
%/W
mA
mA
mA
mA
mA
dB
dB
dB
dB
dB
%
%
%