전자부품 데이터시트 검색엔진 |
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LM2737 데이터시트(PDF) 4 Page - National Semiconductor (TI) |
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LM2737 데이터시트(HTML) 4 Page - National Semiconductor (TI) |
4 / 22 page Electrical Characteristics (Continued) V CC = 5V unless otherwise indicated. Typicals and limits appearing in plain type apply for TA=TJ=+25˚C. Limits appearing in boldface type apply over full Operating Temperature Range. Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis. Symbol Parameter Conditions Min Typ Max Units GATE DRIVE I Q-BOOT BOOT Pin Quiescent Current BOOTV = 12V, EN = 0 0˚C to +125˚C -40˚C to +125˚C 95 95 160 215 µA R DS1 Top FET Driver Pull-Up ON resistance BOOT-SW = 5V@350mA 3 Ω R DS2 Top FET Driver Pull-Down ON resistance BOOT-SW = 5V@350mA 2 Ω R DS3 Bottom FET Driver Pull-Up ON resistance BOOT-SW = 5V@350mA 3 Ω R DS4 Bottom FET Driver Pull-Down ON resistance BOOT-SW = 5V@350mA 2 Ω OSCILLATOR f OSC PWM Frequency R FADJ = 590k Ω 50 kHz R FADJ = 88.7k Ω 300 R FADJ = 42.2k Ω, 0˚C to +125˚C 500 600 700 R FADJ = 42.2k Ω, -40˚C to +125˚C 490 600 700 R FADJ = 17.4k Ω 1400 R FADJ = 11.3k Ω 2000 D Max Duty Cycle f PWM = 300kHz f PWM = 600kHz 90 88 % LOGIC INPUTS AND OUTPUTS V SD-IH SD Pin Logic High Trip Point 2.6 3.5 V V SD-IL SD Pin Logic Low Trip Point 0˚C to +125˚C -40˚C to +125˚C 1.3 1.25 1.6 1.6 V V PWGD-TH-LO PWGD Pin Trip Points FB Voltage Going Down 0˚C to +125˚C -40˚C to +125˚C 0.413 0.410 0.430 0.430 0.446 0.446 V V PWGD-TH-HI PWGD Pin Trip Points FB Voltage Going Up 0˚C to +125˚C -40˚C to +125˚C 0.691 0.688 0.710 0.710 0.734 0.734 V V PWGD-HYS PWGD Hysteresis (LM2737 only) FB Voltage Going Down FB Voltage Going Up 35 110 mV Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions for which the device operates correctly. Opearting Ratings do not imply guaranteed performance limits. Note 2: The human body model is a 100pF capacitor discharged through a 1.5k resistor into each pin. www.national.com 4 |
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