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LM2598SX-5.0 датащи(PDF) 6 Page - Texas Instruments |
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LM2598SX-5.0 датащи(HTML) 6 Page - Texas Instruments |
6 / 47 page 6 LM2598 SNVS125D – MARCH 1998 – REVISED MAY 2016 www.ti.com Product Folder Links: LM2598 Submit Documentation Feedback Copyright © 1998–2016, Texas Instruments Incorporated (1) 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 can affect switching regulator system performance. When the LM2598 is used as shown in the Figure 42 and Figure 45, system performance is as shown in system parameters of Electrical Characteristics. 7.8 Electrical Characteristics – Adjustable Voltage Version Specifications are for TJ = 25°C, unless otherwise specified. PARAMETER TEST CONDITIONS MIN(1) TYP(2) MAX(1) UNIT SYSTEM PARAMETERS(3) (see Figure 42 and Figure 45 for test circuits) 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 42 and Figure 45 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 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 the Adjustable version, 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 unless otherwise noted. Unless otherwise specified, VIN = 12 V for the 3.3-V, 5-V, and Adjustable version and VIN = 24 V for the 12-V version. ILOAD = 500 mA 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 See(3) TJ = 25°C 127 150 173 kHz Over full operating temperature range 110 173 VSAT Saturation voltage IOUT = 1 A (4) (5) TJ = 25°C 1 1.2 V Over full operating temperature range 1.3 DC Max duty cycle (ON) See(5) 100% Minimum duty cycle (OFF) See(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, see(4)(6)(7) 50 μA Output = –1 V 2 15 mA IQ Operating quiescent current SD/SS pin open(6) 5 10 mA ISTBY Current standby quiescent SD/SS pin = 0 V(7) TJ = 25°C 85 200 μA Over full operating temperature range 250 |
Аналогичный номер детали - LM2598SX-5.0 |
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Аналогичное описание - LM2598SX-5.0 |
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