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LM2575IKC Scheda tecnica(PDF) 5 Page - Texas Instruments |
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LM2575IKC Scheda tecnica(HTML) 5 Page - Texas Instruments |
5 / 12 page www.ti.com Electrical Characteristics LM2575 1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATOR SLVS569D – JANUARY 2005 – REVISED JULY 2005 I LOAD = 200 mA, VIN = 12 V for 3.3-V, 5-V, and adjustable versions, VIN = 25 V for 12-V version, VIN = 30 V for 15-V version (unless otherwise noted) (see Figure 2) PARAMETER TEST CONDITIONS TJ MIN TYP MAX UNIT VIN = 12 V, ILOAD = 0.2 A 25 °C 3.234 3.3 3.366 LM2575-33 25 °C 3.168 3.3 3.432 4.75 V ≤ V IN ≤ 40 V, 0.2 A ≤ I LOAD ≤ 1 A Full range 3.135 3.465 VIN = 12 V, ILOAD = 0.2 A 25 °C 4.9 5 5.1 LM2575-05 25 °C 4.8 5 5.2 8 V ≤ V IN ≤ 40 V, 0.2 A ≤ I LOAD ≤ 1 A Full range 4.75 5.25 VOUT Output voltage V VIN = 25 V, ILOAD = 0.2 A 25 °C 11.76 12 12.24 LM2575-12 25 °C 11.52 12 12.48 15 V ≤ V IN ≤ 40 V, 0.2 A ≤ I LOAD ≤ 1 A Full range 11.4 12.6 VIN = 30 V, ILOAD = 0.2 A 25 °C 14.7 15 15.3 LM2575-15 25 °C 14.4 15 15.6 18 V ≤ V IN ≤ 40 V, 0.2 A ≤ I LOAD ≤ 1 A Full range 14.25 15 15.75 VIN = 12 V, VOUT = 5 V, 25 °C 1.217 1.23 1.243 ILOAD = 0.2 A Feedback voltage LM2575-ADJ V 25 °C 1.193 1.23 1.267 8 V ≤ V IN ≤ 40 V, VOUT = 5 V, 0.2 A ≤ I LOAD ≤ 1 A Full range 1.18 1.28 LM2575-33 VIN = 12 V, ILOAD = 1 A 75 LM2575-05 VIN = 12 V, ILOAD = 1 A 77 LM2575-12 VIN = 15 V, ILOAD = 1 A 88 η Efficiency 25 °C % LM2575-15 VIN = 18 V, ILOAD = 1 A 88 VIN = 12 V, VOUT = 5 V, LM2575-ADJ 77 ILOAD = 1 A 25 °C 50 100 IIB Feedback bias current VOUT = 5 V (ADJ version only) nA Full range 500 25 °C 47 52 58 fo Oscillator frequency (1) kHz Full range 42 63 25 °C 0.9 1.2 VSAT Saturation voltage IOUT = 1 A(2) V Full range 1.4 Maximum duty cycle (3) 25 °C 93 98 % 25 °C 1.7 2.8 3.6 ICL Peak current (1) (2) A Full range 1.3 4 VIN = 40(4), Output = 0 V 2 IL Output leakage current 25 °C mA VIN = 40(4), Output = –1 V 7.5 30 IQ Quiescent current (4) 25 °C 5 10 mA ISTBY Standby quiescent current OFF (ON/OFF pin = 5 V) 25 °C 50 200 µA 25 °C 2.2 1.4 VIH OFF (VOUT = 0 V) Full range 2.4 ON/OFF logic input level V 25 °C 1.2 1 VIL ON (VOUT = nominal voltage) Full range 0.8 IIH OFF (ON/OFF pin = 5 V) 12 30 ON/OFF input current 25 °C µA IIL OFF (ON/OFF pin = 0 V) 0 10 (1) In the event of an output short or an overload condition, self-protection features lower the oscillator frequency to ∼18 kHz and the minimum duty cycle from 5% to ∼2%. The resulting output voltage drops to ∼40% of its nominal value, causing the average power dissipated by the IC to lower. (2) Output is not connected to diode, inductor, or capacitor. Output is sourcing current. (3) Feedback is disconnected from output and connected to 0 V. (4) To force the output transistor off, FEEDBACK is disconnected from output and connected to 12 V for the adjustable, 3.3-V, and 5-V versions; and 25 V for the 12-V and 15-V versions. 5 |
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