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LM2599S-3.3 データシート(PDF) 5 Page - Texas Instruments |
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LM2599S-3.3 データシート(HTML) 5 Page - Texas Instruments |
5 / 44 page LM2599 www.ti.com SNVS123C – APRIL 1998 – REVISED APRIL 2013 LM2599-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 LM2599-ADJ Units (Limits) Typ Limit (1) (2) SYSTEM PARAMETERS (3) Test Circuit Figure 24 VFB Feedback Voltage 4.5V ≤ VIN ≤ 40V, 0.2A ≤ ILOAD ≤ 3A 1.230 V VOUT programmed for 3V. Circuit of Figure 24. 1.193/1.180 V(min) 1.267/1.280 V(max) η Efficiency VIN = 12V, VOUT = 3V, ILOAD = 3A 73 % (1) Typical numbers are at 25°C and represent the most likely norm. (2) All limits ensured 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 can affect switching regulator system performance. When the LM2599 is used as shown in the Figure 24 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 = 500 mA Symbol Parameter Conditions LM2599-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 = 3A (4) (5) 1.16 V 1.4/1.5 V(max) DC Max Duty Cycle (ON) See (5) 100 % Min Duty Cycle (OFF) See (6) 0 ICL Current Limit Peak Current, (4) (5) 4.5 A 3.6/3.4 A(min) 6.9/7.5 A(max) IL Output Leakage Current See (4) (6) (7) Output = 0V 50 μA(max) Output = −1V 2 mA 30 mA(max) IQ Operating Quiescent SD /SS Pin Open (6) 5 mA Current 10 mA(max) (1) Typical numbers are at 25°C and represent the most likely norm. (2) All limits ensured 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. (7) VIN = 40V. Copyright © 1998–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM2599 |
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