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LM2595S-12 датащи(PDF) 4 Page - Texas Instruments |
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LM2595S-12 датащи(HTML) 4 Page - Texas Instruments |
4 / 41 page LM2595 SNVS122B – MAY 1999 – REVISED APRIL 2013 www.ti.com LM2595-12 Electrical Characteristics (continued) Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range. Symbol Parameter Conditions LM2595-12 Units (Limits) Typ Limit (1) (2) η Efficiency VIN = 25V, ILOAD = 1A 90 % LM2595-ADJ Electrical Characteristics Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range. Symbol Parameter Conditions LM2595-ADJ Units (Limits) Typ Limit (1) (2) SYSTEM PARAMETERS (3) Test Circuit Figure 21 VFB Feedback Voltage 4.5V ≤ VIN ≤ 40V, 0.1A ≤ ILOAD ≤ 1A 1.230 V VOUT programmed for 3V. Circuit of Figure 21 1.193/1.180 V(min) 1.267/1.280 V(max) η Efficiency VIN = 12V, VOUT = 3V, ILOAD = 1A 78 % (1) Typical numbers are at 25°C and represent the most likely norm. (2) All limits specified at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits are 100% production tested. All limits at temperature extremes are specified via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL). (3) External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect switching regulator system performance. When the LM2595 is used as shown in the Figure 21 test circuit, system performance will be as shown in system parameters of Electrical Characteristics section. All Output Voltage Versions Electrical Characteristics 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 LM2595-XX Units (Limits) Typ Limit (1) (2) DEVICE PARAMETERS Ib Feedback Bias Current Adjustable Version Only,VFB = 1.3V 10 nA 50/100 nA (max) fO Oscillator Frequency See (3) 150 kHz 127/110 kHz(min) 173/173 kHz(max) VSAT Saturation Voltage IOUT = 1A (4) (5) 1 V 1.2/1.3 V(max) DC Max Duty Cycle (ON) See (5) 100 % Min Duty Cycle (OFF) See (6) 0 (1) Typical numbers are at 25°C and represent the most likely norm. (2) All limits specified at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits are 100% production tested. All limits at temperature extremes are specified via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL). (3) The switching frequency is reduced when the second stage current limit is activated. The amount of reduction is determined by the severity of current overload. (4) No diode, inductor or capacitor connected to output pin. (5) Feedback pin removed from output and connected to 0V to force the output transistor switch ON. (6) Feedback pin removed from output and connected to 12V for the 3.3V, 5V, and the ADJ. version, and 15V for the 12V version, to force the output transistor switch OFF. 4 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LM2595 |
Аналогичный номер детали - LM2595S-12 |
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Аналогичное описание - LM2595S-12 |
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