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LM2598 датащи(PDF) 6 Page - Texas Instruments |
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LM2598 датащи(HTML) 6 Page - Texas Instruments |
6 / 45 page LM2598 SNVS125C – MARCH 1998 – REVISED APRIL 2013 www.ti.com All Output Voltage Versions Electrical Characteristics (continued) Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range. Unless otherwise specified, VIN = 12V for the 3.3V, 5V, and Adjustable version and VIN = 24V for the 12V version. ILOAD = 200 mA Symbol Parameter Conditions LM2598-XX Units (Limits) Typ Limit (1) (2) ISTBY Standby Quiescent SD /SS pin = 0V, (7) 85 μA Current 200/250 μA(max) θJC Thermal Resistance TO220 or DDPAK Package, Junction to Case 2 °C/W θJA TO220 Package, Junction to Ambient (8) 50 °C/W θJA DDPAK Package, Junction to Ambient (9) 50 °C/W θJA DDPAK Package, Junction to Ambient (10) 30 °C/W θJA DDPAK Package, Junction to Ambient (11) 20 °C/W SHUTDOWN/SOFT-START CONTROL Test Circuit of Figure 24 VSD Shutdown Threshold 1.3 V Voltage Low, (Shutdown Mode) 0.6 V(max) High, (Soft-start Mode) 2 V(min) VSS Soft-start Voltage VOUT = 20% of Nominal Output Voltage 2 V VOUT = 100% of Nominal Output Voltage 3 ISD Shutdown Current VSHUTDOWN = 0.5V 5 μA 10 μA(max) ISS Soft-start Current VSoft-start = 2.5V 1.6 μA 5 μA(max) FLAG/DELAY CONTROL Test Circuit of Figure 24 Regulator Dropout Detector Low (Flag ON) 96 % Threshold Voltage 92 %(min) 98 %(max) VFSAT Flag Output Saturation ISINK = 3 mA 0.3 V Voltage VDELAY = 0.5V 0.7/1.0 V(max) IFL Flag Output Leakage Current VFLAG = 40V 0.3 μA Delay Pin Threshold 1.25 V Voltage Low (Flag ON) 1.21 V(min) High (Flag OFF) and VOUT Regulated 1.29 V(max) Delay Pin Source Current VDELAY = 0.5V 3 μA 6 μA(max) Delay Pin Saturation Low (Flag ON) 55 mV 350/400 mV(max) (8) Junction to ambient thermal resistance (no external heat sink) for the TO-220 package mounted vertically, with the leads soldered to a printed circuit board with (1 oz.) copper area of approximately 1 in2. (9) Junction to ambient thermal resistance with the DDPAK package tab soldered to a single sided printed circuit board with 0.5 in2 of (1 oz.) copper area. (10) Junction to ambient thermal resistance with the DDPAK package tab soldered to a single sided printed circuit board with 2.5 in2 of (1 oz.) copper area. (11) Junction to ambient thermal resistance with the DDPAK package tab soldered to a double sided printed circuit board with 3 in2 of (1 oz.) copper area on the LM2598S side of the board, and approximately 16 in2 of copper on the other side of the p-c board. See Application Information in this data sheet and the thermal model in Switchers Made Simple™ version 4.2 software. 6 Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM2598 |
Аналогичный номер детали - LM2598_13 |
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Аналогичное описание - LM2598_13 |
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