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LM2595T-3.3/NOPB Datasheet(PDF) 6 Page - Texas Instruments |
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LM2595T-3.3/NOPB Datasheet(HTML) 6 Page - Texas Instruments |
6 / 43 page 6 LM2595 SNVS122C – MAY 1999 – REVISED MAY 2016 www.ti.com Product Folder Links: LM2595 Submit Documentation Feedback Copyright © 1999–2016, Texas Instruments Incorporated (1) All limits specified at room temperature and temperature extremes. 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). (2) Typical numbers are at 25°C and represent the most likely norm. (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 35 test circuit, system performance is shown in the test conditions column. 7.8 Electrical Characteristics – Adjustable Specifications are for TJ = 25°C (unless otherwise noted). PARAMETER TEST CONDITIONS MIN(1) TYP(2) MAX(1) UNIT SYSTEM PARAMETERS(3) (see Figure 35 for test circuit) VFB Feedback voltage 4.5 V ≤ VIN ≤ 40 V, 0.1 A ≤ ILOAD ≤ 1 A 1.23 V VOUT programmed for 3 V, circuit of Figure 35 TJ = 25°C 1.193 1.267 Over full operating temperature range 1.18 1.28 η Efficiency VIN = 12 V, VOUT = 3 V, ILOAD = 1 A 78% (1) All limits specified at room temperature and temperature extremes. 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). (2) Typical numbers are at 25°C and represent the most likely norm. (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 0 V to force the output transistor switch ON. (6) Feedback pin removed from output and connected to 12 V for the 3.3-V, 5-V, and adjustable versions, and 15 V for the 12-V version, to force the output transistor switch OFF. (7) VIN = 40 V. 7.9 Electrical Characteristics – All Output Voltage Versions Specifications are for TJ = 25°C, ILOAD = 200 mA, VIN = 12 V for the 3.3-V, 5-V, and adjustable versions, and VIN = 24 V for the 12-V version (unless otherwise noted). PARAMETER TEST CONDITIONS MIN(1) TYP(2) MAX(1) UNIT DEVICE PARAMETERS Ib Feedback bias current Adjustable version only, VFB = 1.3 V TJ = 25°C 10 50 nA Over full operating temperature range 100 fO Oscillator frequency(3) TJ = 25°C 127 150 173 kHz Over full operating temperature range 110 173 VSAT Saturation voltage IOUT = 1 A, TJ = 25°C (4) (5) 1 1.2 V Over full operating temperature range 1.3 DC Max duty cycle (ON)(5) 100% Min duty cycle (OFF)(6) 0% ICL Current limit Peak current(4)(5) TJ = 25°C 1.2 1.5 2.4 A Over full operating temperature range 1.15 2.6 IL Output leakage current Output = 0 V(4)(6)(7) 50 μA Output = −1 V 2 15 mA IQ Quiescent current(6) 5 10 mA ISTBY Standby quiescent current ON/OFF pin = 5 V (OFF)(7) TJ = 25°C 85 200 μA Over full operating temperature range 250 ON/OFF CONTROL (see Figure 35 for test circuit) ON/OFF pin logic input 1.3 V VIH Threshold voltage, high Regulator ON, over full operating temperature range 0.6 V VIL Threshold voltage, low Regulator OFF, over full operating temperature range 2 V IH ON/OFF pin input current, high VLOGIC = 2.5 V (regulator OFF) 5 15 μA IL ON/OFF pin input current, low VLOGIC = 0.5 V (regulator ON) 0.02 5 μA |
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