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LT1587CM Datasheet(PDF) 4 Page - Linear Technology |
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LT1587CM Datasheet(HTML) 4 Page - Linear Technology |
4 / 12 page 4 LT1584/LT1585/LT1587 PARAMETER CONDITIONS MIN TYP MAX UNITS Adjust Pin Current LT1584/5/7 q 55 120 µA Adjust Pin Current LT1584 1.5V ≤ (VIN – VOUT) ≤ 3V, 10mA ≤ IOUT ≤ IFULL LOAD Change (Note 3) LT1585/7 1.5V ≤ (VIN – VOUT) ≤ 5.75V, 10mA ≤ IOUT ≤ IFULL LOAD q 0.2 5 µA Minimum LT1584/5/7 1.5V ≤ (VIN – VOUT) ≤ 5.75V q 210 mA Load Current Quiescent Current LT1584/5/7-3.3 VIN = 5V LT1584/5-3.38 VIN = 5V LT1584/5/7-3.45 VIN = 5V LT1584/5/7-3.6 VIN = 5V q 813 mA Ripple Rejection LT1584 f = 120Hz, COUT = 25µF Tant., (VIN – VOUT) = 2.5V, IOUT = 7A LT1584-3.3 f = 120Hz, COUT = 25µF Tant., VIN = 5.8V, IOUT = 7A LT1584-3.38 f = 120Hz, COUT = 25µF Tant., VIN = 5.88V, IOUT = 7A LT1584-3.45 f = 120Hz, COUT = 25µF Tant., VIN = 5.95V, IOUT = 7A LT1584-3.6 f = 120Hz, COUT = 25µF Tant., VIN = 6.1V, IOUT = 7A LT1585 f = 120Hz, COUT = 25µF Tant., (VIN – VOUT) = 3V, IOUT = 4.6A, TJ ≥ 25°C f = 120Hz, COUT = 25µF Tant., (VIN – VOUT) = 3V, IOUT = 4A, TJ < 25°C LT1585-3.3 f = 120Hz, COUT = 25µF Tant., VIN = 6.3V, IOUT = 4.6A, TJ ≥ 25°C f = 120Hz, COUT = 25µF Tant., VIN = 6.3V, IOUT = 4A, TJ < 25°C LT1585-3.38 f = 120Hz, COUT = 25µF Tant., VIN = 6.38V, IOUT = 4A LT1585-3.45 f = 120Hz, COUT = 25µF Tant., VIN = 6.45V, IOUT = 4A LT1585-3.6 f = 120Hz, COUT = 25µF Tant., VIN = 6.6V, IOUT = 4A LT1587 f = 120Hz, COUT = 25µF Tant., (VIN – VOUT) = 3V, IOUT = 3A LT1587-3.3 f = 120Hz, COUT = 25µF Tant., VIN = 6.3V, IOUT = 3A LT1587-3.45 f = 120Hz, COUT = 25µF Tant., VIN = 6.45V, IOUT = 3A LT1587-3.6 f = 120Hz, COUT = 25µF Tant., VIN = 6.6V, IOUT = 3A q 60 72 dB Thermal Regulation LT1584/5/7 TA = 25°C, 30ms pulse LT1584/5/7-3.3 TA = 25°C, 30ms pulse LT1584/5-3.38 TA = 25°C, 30ms pulse LT1584/5/7-3.45 TA = 25°C, 30ms pulse LT1584/5/7-3.6 TA = 25°C, 30ms pulse 0.004 0.02 %/W Temperature Stability q 0.5 % Long-Term Stability TA = 125°C, 1000 Hrs. 0.03 1.0 % RMS Output Noise TA = 25°C, 10Hz ≤ f ≤ 10kHz 0.003 % (% of VOUT) Thermal Resistance LT1584 T Package: Control Circuitry/Power Transistor 0.65/2.7 °C/W Junction to Case LT1585 T Package: Control Circuitry/Power Transistor 0.7/3.0 °C/W LT1585 M Package: Control Circuitry/Power Transistor 0.7/3.0 °C/W LT1587 T Package: Control Circuitry/Power Transistor 0.7/3.0 °C/W LT1587 M Package: Control Circuitry/Power Transistor 0.7/3.0 °C/W ELECTRICAL CHARACTERISTICS Note 3: IFULL LOAD is defined as the maximum value of output load current as a function of input-to-output voltage. IFULL LOAD is equal to 7A for the LT1584, 4.6A at TJ ≥ 25°C and 4A at TJ < 25°C for the LT1585/LT1585-3.3 and 3A for the LT1587. The remaining LT1585 fixed voltage versions are 4A. The LT1585 and LT1587 have constant current limit with changes in input-to-output voltage. The LT1584 has variable current limit which decreases about 4A as input-to-output voltage increases from 3V to 7V. The q denotes specifications which apply over the specified operating temperature range. Note 1: 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 2: Line and load regulation are guaranteed up to the maximum power dissipation (25W for the LT1584 in T package, 26.5W for the LT1585 in T package, 18W for the LT1587 in T package). Power dissipation is determined by input/output differential and the output current. Guaranteed maximum output power will not be available over the full input/output voltage range. |
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