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TPS82740B Datasheet(PDF) 6 Page - Texas Instruments |
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TPS82740B Datasheet(HTML) 6 Page - Texas Instruments |
6 / 28 page TPS82740A, TPS82740B SLVSCE3A – JUNE 2014 – REVISED JUNE 2014 www.ti.com Electrical Characteristics (continued) VIN = 3.6V, TA = –40°C to 85°C, typical values are at TA = 25°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT AUTO 100% MODE TRANSITION Auto 100% Mode 170 250 340 mV Rising VIN,100% Mode is left with VIN = VOUT + VTH_100+ , max value VTH_100+ exit detection at TJ = 85°C threshold (1) Auto 100% Mode 110 200 280 Falling VIN, 100% Mode is entered with VIN = VOUT + VTH_100-, max VTH_100- enter detection value at TJ = 85°C threshold (1) OUTPUT tStartup_delay Regulator start up From transition EN = low to high until device starts switching 10 25 ms delay time tSoftstart Softstart time with 2.2V ≤ VIN ≤ 5.5V, EN = VIN 400 1200 µs reduced switch current limit High side MOSFET 80 150 200 switch current limit ILIM_softstart Reduced switch current limit during softstart mA Low side MOSFET 150 switch current limit Output voltage Output voltages are selected with pins VSEL1, TPS82740A 1.8 2.5 V range VSEL2, VSEL3 TPS82740B 2.6 3.3 IOUT = 10mA, VOUT = 1.8V / 2.6V -2.5 0 2.5 % Output voltage accuracy IOUT = 100mA, VOUT = 1.8V / 2.6V –2 0 2 VVOUT DC output voltage VOUT = 1.8V / 2.6V, CTRL = VIN 0.001 %/mA load regulation DC output voltage VOUT = 1.8V / 2.6V, CTRL = VIN, IOUT = 10 mA, 2.5V ≤ VIN ≤ 5.5V 0 %/V line regulation (1) VIN is compared to the programmed output voltage (VOUT). When VIN–VOUT falls below VTH_100- , the device enters 100% Mode by turning the high side MOSFET on. 100% Mode is exited when VIN–VOUT exceeds VTH_100+ and the device starts switching. The hysteresis for the 100% Mode detection threshold VTH_100+ - VTH_100- is always positive and 50 mV(typ.) 8.6 Typical Characteristics TABLE OF GRAPHS FIGURE Figure 3, Figure 4, Figure 5, η Efficiency vs Output Current Figure 6 Figure 7, Figure 8, Figure 9, η Efficiency vs Input Voltage Figure 10 Figure 11, Figure 12, Figure 13, VOUT Output voltage vs Output curent Figure 14 IQ Operating quiescent current vs Input voltage Figure 1 ISD Shutdown current vs Input voltage Figure 2 Automatic Transition into 100% Mode Figure 18, Figure 19, Figure 20 FSW Switching frequency vs Output current Figure 15, Figure 16, Figure 17 Figure 21, Figure 22, Figure 23, Figure 24, Figure 25, Figure 26, Line and Load Transient Performance Figure 27, Figure 28, Figure 29, Figure 30 AC load regulation performance Figure 31, Figure 32 LOAD LOAD Output Behavior Figure 33, Figure 34, Figure 35 Figure 36, Figure 37, Figure 38, Input Voltage Ramp up / down Figure 39 6 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated |
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