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TPS92690Q1PWP Fiches technique(PDF) 5 Page - Texas Instruments |
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TPS92690Q1PWP Fiches technique(HTML) 5 Page - Texas Instruments |
5 / 41 page TPS92690-Q1 www.ti.com SLVSCU0 – NOVEMBER 2015 6.5 Electrical Characteristics –40°C < TJ = TA < 125°C, VIN = 14 V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT STARTUP REGULATOR (VCC) VCCREG VCC regulation voltage ICC = 0 mA 6.35 6.9 7.45 V ICCLIM VCC current limit VVCC = 0 V –20 –30 mA IQ Quiescent current 2 3 mA ISD Shutdown current VSS/SD = 0 V 45 65 μA VVCC rising 4.1 4.50 VCCUV VCC UVLO threshold V VVCC falling 3.61 4.01 VCCHYS VCC UVLO hysteresis 83 mV REFERENCE VOLTAGE OUTPUT VREF Reference voltage No load 2.4 2.45 2.5 V ERROR AMPLIFIER CSP input bias current –0.6 0 0.6 μA COMP sink current 17.1 28.5 39.9 μA COMP source current VIADJ = 5 V –12.6 –16.8 –21 μA gM Transconductance VIADJ = 1 V, 0 V ≤ VCSP ≤ 0.8 V 33 μA/V Transconductance bandwidth –6dB 1 MHz IADJ pin input impedance 1 M Ω VCSP Error amplifier reference voltage Precise value implied in offset VIADJ/10 V VVCC = 4.5 V, 1 V ≤ VCOMP ≤ 1.4 V, –1.5 0 1.5 TA = 25°C mV VVCC > 6 V, 1 V ≤ VCOMP ≤ 3 V, VIADJ Error amplifier input offset voltage –1.8 0 1.8 ≤ 1.25 V, TA = 25°C VVCC > 6 V, 1 V ≤ VCOMP ≤3 V, VIADJ –1.44 0 1.44 VCSP% > 1.25 V, TA = 25°C (% of ) PWM COMPARATOR AND SLOPE COMPENSATION DMAX Maximum duty cycle Internal oscillator only 90% 94.4% No slope added 950 1100 1250 IS to PWM offset voltage mV D = DMAX (maximum slope added) 125 IOFF IS source current No slope added –11.9 μA IOFF + ISL D = DMAX (maximum slope added) –60 μA CURRENT LIMIT ILIM delay to output 60 100 ns tON(min) Leading edge blanking time 200 300 ns Current limit off-timer 38 μs ILIM offset voltage D = 50% –19 –5.6 5 mV LOW POWER SHUTDOWN AND SOFTSTART VSD Shutdown threshold voltage VSS/SD falling 30 86 mV VSDH Shutdown hysteresis 24 mV VSS/SD > (VSD + VSDH) –10.8 μA ISS SS/SD current source VSS/SD < VSD –1.1 μA OSCILLATOR AND EXTERNAL SYNCHRONIZATION RRT = 121 kΩ 312 350 389 ƒSW Switching frequency RRT = 100 kΩ 372 418 464 kHz RRT = 84.5 kΩ 436 490 544 Rising 2.05 2.36 SYNC threshold voltage (falling edge triggers V on-time) Falling 0.95 1.31 Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: TPS92690-Q1 |
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