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LM26400Y Datasheet(PDF) 4 Page - Texas Instruments |
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LM26400Y Datasheet(HTML) 4 Page - Texas Instruments |
4 / 32 page LM26400Y SNVS457B – FEBRUARY 2007 – REVISED AUGUST 2007 www.ti.com Electrical Characteristics Unless otherwise stated, the following conditions apply: AVIN = PVIN = VIN = 5V. Limits in standard type are for TJ = 25°C only; limits in boldfacetype apply over the junction temperature (TJ) range of -40°C to 125°C. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Symbol Parameter Conditions Min Typ Max Units 0°C to 85°C. Feedback Loop 0.591 0.6 0.611 Closed. VFB Voltages at FB1 and FB2 Pins V -40°C to 125°C. Feedback 0.585 0.617 Loop V Closed. ΔVFB_Line Line Regulation of FB1 and FB2 Voltages, VIN = 3V to 20V 66 ppm/V Expressed as PPM Change Per Volt of VIN Variation IFB Current in FB1 and FB2 Pins VFB = 0.6V 0.4 250 nA VIN Rising From 0V 2.7 2.9 V VUVLO Under Voltage Lockout Threshold VIN Falling From 3.3V 2.0 2.3 VUVLO_HYS UVLO Hysteresis 0.2 0.36 0.55 V FSW Switching Frequency 0.39 0.52 0.65 MHz DMAX Maximum Duty Cycle 90 96 % DMIN Minimum Duty Cycle 2 % ETSSOP, 2A Drain Current 175 320 RDS(ON) ON Resistance of Internal Power MOSFET m Ω LLP, 2A Drain Current 194 350 ICL Peak Current Limit of Internal MOSFET 2.5 3 4.5 A ISD Shutdown Current of AVIN Pin EN1 = EN2 = 0V 2 nA IQ Quiescent Current of AVIN Pin (both EN1 = EN2 = 5V, FB1 = FB2 4 mA channels are enabled but not switching) = 0.7V VEN_IH Input Logic High of EN1 and EN2 Pins 2.5 V VEN_IL Input Logic Low of EN1 and EN2 Pins 0.4 V IEN EN1 and EN2 Currents (sink or source) 5 nA ISW_LEAK Switch Leakage Current Measured at SW1 EN1 = EN2 = SWx = 0 1 µA and SW2 Pins ΔΦ Phase Shift Between SW1 and SW2 Rising Feedback Loop Closed. 170 180 19 deg Edges Continuous Conduction Mode. ISS SSx Pin Current 11 16 21 µA ΔISS Difference Between SS1 and SS2 Currents 3 µA VFB_F FB1 and FB2 Frequency Fold-back 0.35 V Threshold 4 Submit Documentation Feedback Copyright © 2007, Texas Instruments Incorporated Product Folder Links: LM26400Y |
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