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LM43603 Datasheet(PDF) 6 Page - Texas Instruments |
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LM43603 Datasheet(HTML) 6 Page - Texas Instruments |
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6 / 50 page  LM43603 SNVSA09B – APRIL 2014 – REVISED SEPTEMBER 2014 www.ti.com Electrical Characteristics (continued) Limits apply over the recommended operating junction temperature (TJ) range of -40°C to +125°C, unless otherwise stated. Minimum and Maximum limits are specified 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. Unless otherwise stated, the following conditions apply: VIN = 12 V, VOUT = 3.3 V, FS = 500 kHz. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT VOLTAGE REFERENCE (FB PIN) VFB Feedback voltage TJ = 25 ºC 1.004 1.011 1.018 TJ = -40 ºC to 85 ºC 0.994 1.011 1.026 V TJ = -40 ºC to 125 ºC 0.994 1.011 1.030 ILKG-FB Input leakage current at FB pin FB = 1.011 V 0.2 65 nA THERMAL SHUTDOWN TSD (1) Thermal shutdown Shutdown threshold 160 ºC Recovery threshold 150 ºC CURRENT LIMIT AND HICCUP IHS-LIMIT Peak inductor current limit 4.4 5.5 6.4 A ILS-LIMIT Inductor current valley limit 2.6 3.0 3.3 A SOFT START (SS/TRK PIN) ISSC Soft-start charge current 1.25 2.0 2.75 µA RSSD Soft-start discharge resistance UVLO, TSD, OCP, or EN = 0 V 18 k Ω POWER GOOD (PGOOD PIN) VPGOOD-HIGH Power-good flag over voltage tripping % of FB voltage 110% 113% threshold VPGOOD-LOW Power-good flag under voltage tripping % of FB voltage 77% 88% threshold VPGOOD-HYS Power-good flag recovery hysteresis % of FB voltage 6% RPGOOD PGOOD pin pull down resistance when VEN = 3.3 V 40 125 Ω power bad VEN = 0 V 60 150 MOSFETS (2) RDS-ON-HS High-side MOSFET ON-resistance IOUT = 1 A 120 m Ω VBIAS = VOUT = 3.3 V RDS-ON-LS Low-side MOSFET ON-resistance IOUT = 1 A 65 m Ω VBIAS = VOUT = 3.3 V (1) Ensured by design (2) Measured at pins 7.6 Timing Requirements MIN TYP MAX UNIT CURRENT LIMIT AND HICCUP NOC Hiccup wait cycles when LS current limit tripped 32 Cycles TOC Hiccup retry delay time 5.5 ms SOFT START (SS/TRK PIN) TSS Internal soft-start time when SS pin open circuit 4.1 ms POWER GOOD (PGOOD PIN) TPGOOD-RISE Power-good flag rising transition deglitch delay 220 µs TPGOOD-FALL Power-good flag falling transition deglitch delay 220 µs 6 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated Product Folder Links: LM43603 |
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