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LMZ23605 Datasheet(PDF) 4 Page - Texas Instruments |
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LMZ23605 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 33 page LMZ23605 SNVS659I – MARCH 2011 – REVISED AUGUST 2015 www.ti.com 6.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) MIN MAX UNIT VIN 6 36 V EN, SYNC 0 5 V Operation junction temperature −40 125 °C 6.4 Thermal Information LMZ23605 THERMAL METRIC(1) NDW UNIT 7 PINS RθJA 4-layer Evaluation Printed-Circuit-Board, 60 vias, No air 12 Junction-to-ambient thermal flow °C/W resistancet(2) 2-layer JEDEC Printed-Circuit-Board, No air flow 21.5 RθJC(top) Junction-to-case (top) thermal resistance 1.9 °C/W (1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953. (2) RθJA measured on a 3.5-in × 3.5-in 4-layer board, with 3-oz. copper on outer layers and 2-oz. copper on inner layers, sixty thermal vias, no air flow, and 1-W power dissipation. Refer to application note layout diagrams. 6.5 Electrical Characteristics Limits in standard type are for TJ = 25°C unless otherwise specified. Minimum and maximum limits are ensured 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 PARAMETER TEST CONDITIONS MIN(1) TYP(2) MAX(1) UNIT SYSTEM PARAMETERS ENABLE CONTROL 1.279 V VEN EN threshold trip point VEN rising over the junction temperature 1.1 1.458 (TJ) range of –40°C to +125°C EN input hysteresis –21 µA VEN-HYS VEN > 1.279 V current SOFT-START 50 µA ISS SS source current VSS = 0 V over the junction temperature 40 60 (TJ) range of –40°C to +125°C tSS Internal soft-start interval 1.6 ms CURRENT LIMIT over the junction temperature 5.4 A ICL Current limit threshold DC average (TJ) range of –40°C to +125°C INTERNAL SWITCHING OSCILLATOR Free-running oscillator 711 812 914 kHz fosc Sync input connected to ground. frequency fsync Synchronization range 650 950 kHz Synchronization logic zero over the junction temperature 0.4 V VIL-sync Relative to AGND amplitude (TJ) range of –40°C to +125°C Synchronization logic one over the junction temperature 1.5 V VIH-sync Relative to AGND. amplitude (TJ) range of –40°C to +125°C Synchronization duty cycle 15% 50% 85% Sync DC range Dmax Maximum Duty Factor 83% (1) Minimum and Maximum limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation using Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality Level (AOQL). (2) Typical numbers are at 25°C and represent the most likely parametric norm. 4 Submit Documentation Feedback Copyright © 2011–2015, Texas Instruments Incorporated Product Folder Links: LMZ23605 |
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