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LM43602QPWPTQ1 bảng dữ liệu(PDF) 6 Page - Texas Instruments |
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LM43602QPWPTQ1 bảng dữ liệu(HTML) 6 Page - Texas Instruments |
6 / 48 page LM43602-Q1 SNVSA83A – APRIL 2015 – REVISED MAY 2015 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. PARAMETER CONDITIONS MIN TYP MAX UNIT VOLTAGE REFERENCE (FB PIN) TJ = 25 ºC 1.012 1.015 1.019 VFB Feedback voltage V TJ = –40 ºC to 125 ºC 0.999 1.015 1.032 ILKG-FB Input leakage current at FB pin FB = 1.015 V 0.2 65 nA THERMAL SHUTDOWN Shutdown threshold 160 ºC TSD (1) Thermal shutdown Recovery threshold 150 ºC CURRENT LIMIT AND HICCUP IHS-LIMIT Peak inductor current limit 3.65 4.5 5.15 A ILS-LIMIT Inductor current valley limit 1.75 2 2.25 A SOFT START (SS/TRK PIN) ISSC Soft-start charge current 1.25 2 2.75 µA RSSD Soft-start discharge resistance UVLO, TSD, OCP, or EN = 0 V 18 k Ω POWER GOOD (PGOOD PIN) Power-good flag over voltage tripping VPGOOD-HIGH % of FB voltage 110% 113% threshold Power-good flag under voltage tripping VPGOOD-LOW % of FB voltage 77% 88% threshold VPGOOD-HYS Power-good flag recovery hysteresis % of FB voltage 6% VEN = 3.3 V 40 125 PGOOD pin pull down resistance when RPGOOD Ω power bad VEN = 0 V 60 150 MOSFETS (2) IOUT = 1 A RDS-ON-HS High-side MOSFET ON-resistance 120 m Ω VBIAS = VOUT = 3.3 V IOUT = 1 A RDS-ON-LS Low-side MOSFET ON-resistance 65 m Ω VBIAS = VOUT = 3.3 V (1) Ensured by design. (2) Measured at the pins. 7.6 Timing Requirements MIN NOM 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 © 2015, Texas Instruments Incorporated Product Folder Links: LM43602-Q1 |
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