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TPS40002DGQR Datasheet(PDF) 4 Page - Texas Instruments |
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TPS40002DGQR Datasheet(HTML) 4 Page - Texas Instruments |
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4 / 24 page  TPS40000, TPS40001 TPS40002, TPS40003 TPS40004, TPS40005 SLUS507D − JANUARY 2002 − REVISED NOVEMBER 2005 4 www.ti.com ELECTRICAL CHARACTERISTICS over recommended operating temperature range, TA = −40_C to 85_C, VDD = 5.0 V, all parameters measured at zero power dissipation (unless otherwise noted) current limit PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ISINK ILIM sink current VDD = 5 V 11 15 19 A ISINK ILIM sink current VDD = 2.25 V 9.5 13.0 16.5 µA VOS Offset voltage SW vs ILIM(1) 2.25 V ≤ VDD ≤ 5.00 −20 0 20 mV VILIM Input voltage range 2 VDD V tON Minimum HDRV pulse time in overcurrent VDD = 3.3 V 200 300 ns SW leading edge blanking pulse in over- current detection 100 ns tSS Soft-start capacitor cycles as fault timer(1) 6 rectifier zero current comparator PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VSW Sense voltage to turn off rectifier TPS40000 TPS40002 LDRV output OFF −15 −7 −2 mV SW leading edge blanking pulse in zero current detection 75 ns predictive delay PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VSWP Sense threshold to modulate delay time −350 mV TLDHD Maximum delay modulation range time LDRV OFF − to − HDRV ON 50 75 100 ns Predictive counter delay time per bit LDRV OFF − to − HDRV ON 3.0 4.5 6.2 ns THDLD Maximum delay modulation range HDRV OFF − to − LDRV ON 40 65 90 ns Predictive counter delay time per bit HDRV OFF − to − LDRV ON 2.4 4.0 5.6 ns shutdown PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VSD Shutdown threshold voltage Outputs OFF 0.09 0.13 0.205 V VEN Device active threshold voltage 0.14 0.17 0.235 V soft start PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ISS Soft-start source current Outputs OFF 2.0 3.7 5.4 µA VSS Soft-start clamp voltage 1.1 1.5 1.9 V bootstrap PARAMETER TEST CONDITIONS MIN TYP MAX UNIT RBOOT Bootstrap switch resistance VDD = 3.3 V 50 100 Ω RBOOT Bootstrap switch resistance VDD = 5 V 35 70 Ω (1) Ensured by design. Not production tested. (2) At VDD input voltage of 2.25 V, derate the maximum duty cycle by 3%. |
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