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TPS54418RTET Datasheet(PDF) 3 Page - Texas Instruments |
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TPS54418RTET Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 34 page  TPS54418 www.ti.com SLVS946A – MAY 2009 – REVISED MAY 2010 ELECTRICAL CHARACTERISTICS TJ = –40°C to 150°C, VIN = 2.95 to 6 V (unless otherwise noted) DESCRIPTION CONDITIONS MIN TYP MAX UNIT SUPPLY VOLTAGE (VIN PIN) Operating input voltage 2.95 6 V Internal under voltage lockout threshold No voltage hysteresis, rising and falling 2.6 2.8 V Shutdown supply current EN = 0 V, 25°C, 2.95 V ≤ VIN ≤ 6 V 2 5 mA Quiescent Current - Iq VSENSE = 0.9 V, VIN = 5 V, 25°C, RT = 400 k Ω 350 500 mA ENABLE AND UVLO (EN PIN) Enable threshold Rising 1.16 1.25 1.37 V Falling 1.18 Enable threshold + 50 mV -3.2 Input current mA Enable threshold – 50 mV -0.65 VOLTAGE REFERENCE (VSENSE PIN) Voltage Reference 2.95 V ≤ VIN ≤ 6 V, –40°C <TJ < 150°C 0.795 0.803 0.811 V MOSFET BOOT-PH= 5 V 30 60 High side switch resistance m Ω BOOT-PH= 2.95 V 44 70 VIN= 5 V 30 60 Low side switch resistance m Ω VIN= 2.95 V 44 70 ERROR AMPLIFIER Input current 7 nA Error amplifier transconductance (gm) –2 mA < I(COMP) < 2 mA, V(COMP) = 1 V 225 mmhos Error amplifier transconductance (gm) during –2 mA < I(COMP) < 2 mA, V(COMP) = 1 V, 70 mmhos slow start Vsense = 0.4 V Error amplifier source/sink V(COMP) = 1 V, 100 mV overdrive ±20 mA COMP to Iswitch gm 13.0 A/V CURRENT LIMIT Current limit threshold 5.0 6.4 A THERMAL SHUTDOWN Thermal Shutdown 175 °C Hysteresis 15 °C TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK PIN) Switching frequency range using RT mode 200 2000 kHz Switching frequency Rt = 400 k Ω 400 500 600 kHz Switching frequency range using CLK mode 300 2000 kHz Minimum CLK pulse width 75 ns RT/CLK voltage R(RT/CLK)= 400k Ω 0.5 V RT/CLK high threshold 1.6 2.2 V RT/CLK low threshold 0.4 0.6 V RT/CLK falling edge to PH rising edge delay Measure at 500 kHz with RT resistor in series 90 ns PLL lock in time Measure at 500 kHz 14 ms PH (PH PIN) Minimum On time Measured at 50% points on PH, IOUT = 4 A 60 ns Measured at 50% points on PH, VIN = 5 V, IOUT = 0 110 A Minimum Off time Prior to skipping off pulses, BOOT-PH = 2.95 V, 60 ns IOUT = 4 A Rise/Fall Time VIN = 5 V 1.5 V/ns Copyright © 2009–2010, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s): TPS54418 |
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