Datasheet LT1072 - 2
| Descripción | 1.25A High Efficiency Switching Regulator |
| Páginas / Página | 16 / 2 — ABSOLUTE AXI U RATI GS. (Note 1). Note 1:. (OBSOLETE). PACKAGE/ORDER I … |
| Formato / tamaño de archivo | PDF / 206 Kb |
| Idioma del documento | Inglés |
ABSOLUTE AXI U RATI GS. (Note 1). Note 1:. (OBSOLETE). PACKAGE/ORDER I FOR ATIO. OBSOLETE PACKAGE
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LT1072
W W W U ABSOLUTE AXI U RATI GS (Note 1) Note 1:
Minimum switch “on” time for the LT1072 in current limit is Supply Voltage ≈ 0.7µsec. This limits the maximum input voltage during short-circuit LT1072HV (See Note 1) ... 60V conditions, in the buck and inverting modes only, to ≈ 40V. Normal LT1072 (See Note 1) ... 40V (unshorted) conditions are not affected. If the LT1072 is being operated in the buck or inverting mode at high input voltages and short-circuit Switch Output Voltage conditions are expected, a resistor must be placed in series with the LT1072HV ... 75V inductor, as follows: LT1072 .. 65V The value of the resistor is given by: LT1072S8 .. 60V (t) (f) (VIN) – Vf Feedback Pin Voltage (Transient, 1ms) ... ±15V R = – RL I(LIMIT) Operating Junction Temperature Range t = Minimum “on” time of LT1072 in current limit, ≈ 0.7µs LT1072HVM, LT1072M
(OBSOLETE)
.. –55°C to 150°C f =
Operating frequency (40kHz) LT1072HVC, LT1072C (Oper.)* .. 0°C to 100°C Vf =
Forward voltage of external catch diode at I(LIMIT) LT1072HVC, LT1072C (Sh. Ckt.)* .. 0°C to 125°C I(LIMIT) =
Current limit of LT1072 (2A) LT1072HVI ... –40°C to 125°C RL = Internal series resistance of inductor Storage Temperature Range ... –65°C to 150°C Lead Temperature (Soldering, 10 sec) ... 300°C *Includes LT1072S8
U W U PACKAGE/ORDER I FOR ATIO
ORDER PART ORDER PART NUMBER NUMBER TOP VIEW TOP VIEW BOTTOM VIEW V V SW C GND 1 8 E2 GND 1 8 E2 LT1072HVMK V 2 7 LT1072CN8 V 2 7 C VSW V 1 2 CASE IS C SW 3 6 FB E1 LT1072MK FB 3 6 E1 LT1072CS8 4 3 GND NC 4 5 VIN LT1072HVCK 4 5 NC VIN V FB IN N PACKAGE S8 PACKAGE S8 PART K PACKAGE LT1072CK 8-LEAD PDIP 8-LEAD PLASTIC SO 4-LEAD TO-3 METAL CAN MARKING T T JMAX = 100°C, θJA = 130°C/W T JMAX = 100°C, θJA = 130°C/W JMAX = 150°C, θJC = 8°C/W, θJA = 35°C/W TJMAX = 100°C*, θJC = 8°C/W, θJA = 35°C/W 1072 J PACKAGE LT1072MJ8 8-LEAD CERAMIC DIP TJMAX = 150°C, θJA = 100°C/W LT1072CJ8
OBSOLETE PACKAGE OBSOLETE PACKAGE
Consider the S8 or N8 Packages for Alternate Source TOP VIEW ORDER PART ORDER PART FRONT VIEW NUMBER NUMBER NC 1 16 NC 5 V NC NC IN 2 15 4 V LT1072CT LT1072CSW SW GND 3 14 E2 3 GND V 4 13 C VSW LT1072HVCT 2 FB FB 5 12 E1 1 VC LT1072HVIT NC 6 11 VIN T PACKAGE 7 10 NC NC 5-LEAD TO-220 8 9 NC NC TJMAX = 100°C/W, θJC = 8°C/W, θJA = 50°C/W SW PACKAGE 16-LEAD PLASTIC SO WIDE TJMAX = 100°C, θJC = 130°C/W LT1072 • POI01 Consult LTC Marketing for parts specified with wider operating temperature ranges. 1072fc 2
W W W U ABSOLUTE AXI U RATI GS (Note 1) Note 1:
Minimum switch “on” time for the LT1072 in current limit is Supply Voltage ≈ 0.7µsec. This limits the maximum input voltage during short-circuit LT1072HV (See Note 1) ... 60V conditions, in the buck and inverting modes only, to ≈ 40V. Normal LT1072 (See Note 1) ... 40V (unshorted) conditions are not affected. If the LT1072 is being operated in the buck or inverting mode at high input voltages and short-circuit Switch Output Voltage conditions are expected, a resistor must be placed in series with the LT1072HV ... 75V inductor, as follows: LT1072 .. 65V The value of the resistor is given by: LT1072S8 .. 60V (t) (f) (VIN) – Vf Feedback Pin Voltage (Transient, 1ms) ... ±15V R = – RL I(LIMIT) Operating Junction Temperature Range t = Minimum “on” time of LT1072 in current limit, ≈ 0.7µs LT1072HVM, LT1072M
(OBSOLETE)
.. –55°C to 150°C f =
Operating frequency (40kHz) LT1072HVC, LT1072C (Oper.)* .. 0°C to 100°C Vf =
Forward voltage of external catch diode at I(LIMIT) LT1072HVC, LT1072C (Sh. Ckt.)* .. 0°C to 125°C I(LIMIT) =
Current limit of LT1072 (2A) LT1072HVI ... –40°C to 125°C RL = Internal series resistance of inductor Storage Temperature Range ... –65°C to 150°C Lead Temperature (Soldering, 10 sec) ... 300°C *Includes LT1072S8
U W U PACKAGE/ORDER I FOR ATIO
ORDER PART ORDER PART NUMBER NUMBER TOP VIEW TOP VIEW BOTTOM VIEW V V SW C GND 1 8 E2 GND 1 8 E2 LT1072HVMK V 2 7 LT1072CN8 V 2 7 C VSW V 1 2 CASE IS C SW 3 6 FB E1 LT1072MK FB 3 6 E1 LT1072CS8 4 3 GND NC 4 5 VIN LT1072HVCK 4 5 NC VIN V FB IN N PACKAGE S8 PACKAGE S8 PART K PACKAGE LT1072CK 8-LEAD PDIP 8-LEAD PLASTIC SO 4-LEAD TO-3 METAL CAN MARKING T T JMAX = 100°C, θJA = 130°C/W T JMAX = 100°C, θJA = 130°C/W JMAX = 150°C, θJC = 8°C/W, θJA = 35°C/W TJMAX = 100°C*, θJC = 8°C/W, θJA = 35°C/W 1072 J PACKAGE LT1072MJ8 8-LEAD CERAMIC DIP TJMAX = 150°C, θJA = 100°C/W LT1072CJ8
OBSOLETE PACKAGE OBSOLETE PACKAGE
Consider the S8 or N8 Packages for Alternate Source TOP VIEW ORDER PART ORDER PART FRONT VIEW NUMBER NUMBER NC 1 16 NC 5 V NC NC IN 2 15 4 V LT1072CT LT1072CSW SW GND 3 14 E2 3 GND V 4 13 C VSW LT1072HVCT 2 FB FB 5 12 E1 1 VC LT1072HVIT NC 6 11 VIN T PACKAGE 7 10 NC NC 5-LEAD TO-220 8 9 NC NC TJMAX = 100°C/W, θJC = 8°C/W, θJA = 50°C/W SW PACKAGE 16-LEAD PLASTIC SO WIDE TJMAX = 100°C, θJC = 130°C/W LT1072 • POI01 Consult LTC Marketing for parts specified with wider operating temperature ranges. 1072fc 2