Datasheet LT1083, LT1084, LT1085 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | 3A, 5A, 7.5A Low Dropout Positive Fixed Regulators |
| Pages / Page | 18 / 6 — e lecTrical characTerisTics The. denotes the specifications which apply … |
| File Format / Size | PDF / 252 Kb |
| Document Language | English |
e lecTrical characTerisTics The. denotes the specifications which apply over the full operating
Model Line for this Datasheet
- LT1085CM-3.3#PBF LT1085CM-3.3#PBF LT1085CM-3.3#TRPBF LT1085CM-3.3#TRPBF LT1085CM-3.6#PBF LT1085CM-3.6#PBF LT1085CM-3.6#TRPBF LT1085CM-3.6#TRPBF LT1085CT-12#PBF LT1085CT-12#PBF LT1085CT-3.3#PBF LT1085CT-3.3#PBF LT1085CT-3.6#PBF LT1085CT-3.6#PBF LT1085CT-5#PBF LT1085CT-5#PBF LT1085IM-3.6#PBF LT1085IM-3.6#PBF LT1085IM-3.6#TRPBF LT1085IM-3.6#TRPBF LT1085IT-12#PBF LT1085IT-12#PBF LT1085IT-5#PBF LT1085IT-5#PBF
Text Version of Document
LT1083/LT1084/LT1085 Fixed
e lecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. PARAMETER CONDITIONS MIN TYP MAX UNITS
Quiescent Current LT1084-3.3 VIN = 18V l 5.0 10.0 mA LT1085-3.3 VIN = 18V l 5.0 10.0 mA LT1085-3.6 VIN = 18V l 5.0 10.0 mA LT1083/4/5-5 VIN ≤ 20V l 5.0 10.0 mA LT1083/4/5-12 VIN ≤ 25V l 5.0 10.0 mA Thermal Regulation LT1083-5/12 TA = 25°C, 30ms pulse 0.002 0.010 %/W LT1084-3.3/5/12 0.003 0.015 %/W LT1085-3.3/3.6/5/12 0.004 0.020 %/W Ripple Rejection f = 120Hz, COUT = 25µF Tantalum, IOUT = IFULL_LOAD (Note 4) LT1084-3.3 f = 120Hz, COUT = 25µF Tantalum, IOUT = 5A, VIN = 6.3V l 60 72 dB LT1085-3.3 f = 120Hz, COUT = 25µF Tantalum, VIN = 6.3V, IOUT = 3A l 60 72 dB LT1085-3.6 f = 120Hz, C l OUT = 25µF Tantalum, VIN = 6.6V, IOUT = 3A 60 72 dB LT1083/4/5-5 V l IN = 8V (Note 6) 60 68 dB LT1083/4/5-12 V l IN = 15V (Note 6) 54 60 dB Temperature Stability l 0.5 % Long Term Stability TA = 125°C, 1000 Hrs. 0.03 1.0 % RMS Output Noise TA = 25°C, (% of VOUT) 10Hz = ≤ f ≤ 10kHz 0.003 % Thermal Resistance Control Circuitry/Power Transistor (See Applications Information) Junction-to-Case LT1083 K Package 0.6/1.6 °C/W P Package 0.5/1.6 °C/W LT1084 K Package 0.75/2.3 °C/W P Package 0.65/2.3 °C/W T Package 0.65/2.7 °C/W LT1085 K Package 0.9/3.0 °C/W T Package 0.7/3.0 °C/W DD Package 0.7/3.0 °C/W
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 5:
Dropout voltage is specified over the full output current range of may cause permanent damage to the device. Exposure to any Absolute the device. Test points and limits are shown on the Dropout Voltage curve. Maximum Rating condition for extended periods may affect device
Note 6:
For LT1083 IFULL_LOAD is 5A for –55°C ≤ TJ ≤ – 40°C and 7.5A for reliability and lifetime. TJ ≥ – 40°C.
Note 2:
See thermal regulation specifications for changes in output voltage
Note 7:
1.7V ≤ (VIN – VOUT) ≤ 25V for LT1084 at –55°C ≤ TJ ≤ – 40°C. due to heating effects. Load and line regulation are measured at a constant
Note 8:
Dropout voltage 1.7V maximum for LT1084 at junction temperature by low duty cycle pulse testing. –55°C ≤ TJ ≤ –40°C.
Note 3:
Line and load regulation are guaranteed up to the maximum power
Note 9:
Full load current is not available at all input-output voltages. dissipation (60W for the LT1083, 45W for the LT1084 (K, P), 30W for the See Notes 3, 4, 6. 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:
IFULL_LOAD is defined in the current limit curves. The IFULL_LOAD 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. 1083ffe 6 For more information www.linear.com/LT1083 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
e lecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. PARAMETER CONDITIONS MIN TYP MAX UNITS
Quiescent Current LT1084-3.3 VIN = 18V l 5.0 10.0 mA LT1085-3.3 VIN = 18V l 5.0 10.0 mA LT1085-3.6 VIN = 18V l 5.0 10.0 mA LT1083/4/5-5 VIN ≤ 20V l 5.0 10.0 mA LT1083/4/5-12 VIN ≤ 25V l 5.0 10.0 mA Thermal Regulation LT1083-5/12 TA = 25°C, 30ms pulse 0.002 0.010 %/W LT1084-3.3/5/12 0.003 0.015 %/W LT1085-3.3/3.6/5/12 0.004 0.020 %/W Ripple Rejection f = 120Hz, COUT = 25µF Tantalum, IOUT = IFULL_LOAD (Note 4) LT1084-3.3 f = 120Hz, COUT = 25µF Tantalum, IOUT = 5A, VIN = 6.3V l 60 72 dB LT1085-3.3 f = 120Hz, COUT = 25µF Tantalum, VIN = 6.3V, IOUT = 3A l 60 72 dB LT1085-3.6 f = 120Hz, C l OUT = 25µF Tantalum, VIN = 6.6V, IOUT = 3A 60 72 dB LT1083/4/5-5 V l IN = 8V (Note 6) 60 68 dB LT1083/4/5-12 V l IN = 15V (Note 6) 54 60 dB Temperature Stability l 0.5 % Long Term Stability TA = 125°C, 1000 Hrs. 0.03 1.0 % RMS Output Noise TA = 25°C, (% of VOUT) 10Hz = ≤ f ≤ 10kHz 0.003 % Thermal Resistance Control Circuitry/Power Transistor (See Applications Information) Junction-to-Case LT1083 K Package 0.6/1.6 °C/W P Package 0.5/1.6 °C/W LT1084 K Package 0.75/2.3 °C/W P Package 0.65/2.3 °C/W T Package 0.65/2.7 °C/W LT1085 K Package 0.9/3.0 °C/W T Package 0.7/3.0 °C/W DD Package 0.7/3.0 °C/W
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 5:
Dropout voltage is specified over the full output current range of may cause permanent damage to the device. Exposure to any Absolute the device. Test points and limits are shown on the Dropout Voltage curve. Maximum Rating condition for extended periods may affect device
Note 6:
For LT1083 IFULL_LOAD is 5A for –55°C ≤ TJ ≤ – 40°C and 7.5A for reliability and lifetime. TJ ≥ – 40°C.
Note 2:
See thermal regulation specifications for changes in output voltage
Note 7:
1.7V ≤ (VIN – VOUT) ≤ 25V for LT1084 at –55°C ≤ TJ ≤ – 40°C. due to heating effects. Load and line regulation are measured at a constant
Note 8:
Dropout voltage 1.7V maximum for LT1084 at junction temperature by low duty cycle pulse testing. –55°C ≤ TJ ≤ –40°C.
Note 3:
Line and load regulation are guaranteed up to the maximum power
Note 9:
Full load current is not available at all input-output voltages. dissipation (60W for the LT1083, 45W for the LT1084 (K, P), 30W for the See Notes 3, 4, 6. 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:
IFULL_LOAD is defined in the current limit curves. The IFULL_LOAD 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. 1083ffe 6 For more information www.linear.com/LT1083 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
