数据搜索系统,热门电子元器件搜索 |
|
LM2738YSD 数据表(PDF) 5 Page - Texas Instruments |
|
LM2738YSD 数据表(HTML) 5 Page - Texas Instruments |
5 / 40 page 5 LM2738 www.ti.com SNVS556C – APRIL 2008 – REVISED JANUARY 2016 Product Folder Links: LM2738 Submit Documentation Feedback Copyright © 2008–2016, Texas Instruments Incorporated (1) For more information about traditional and new thermal metrics, see the Semiconductor and device Package Thermal Metrics application report, SPRA953. (2) Typical thermal shutdown occurs if the junction temperature exceeds 165°C. The maximum power dissipation is a function of TJ(MAX) , RθJA and TA . The maximum allowable power dissipation at any ambient temperature is PD = (TJ(MAX) – TA) / RθJA. All numbers apply for packages soldered directly onto a 3 inches × 3 inches PC board with 2 oz. copper on 4 layers in still air in accordance to JEDEC standards. Thermal resistance varies greatly with layout, copper thickness, number of layers in PCB, power distribution, number of thermal vias, board size, ambient temperature, and air flow. 6.4 Thermal Information THERMAL METRIC(1) LM2738 UNIT NGQ (WSON) DGN (MSOP PowerPAD) 8 PINS 8 PINS RθJA Junction-to-ambient thermal resistance (2) 45.9 50.3 °C/W RθJC(top) Junction-to-case (top) thermal resistance 44.6 54.2 °C/W RθJB Junction-to-board thermal resistance 13.2 31.4 °C/W ψJT Junction-to-top characterization parameter 0.5 4.8 °C/W ψJB Junction-to-board characterization parameter 13.2 31.2 °C/W RθJC(bot) Junction-to-case (bottom) thermal resistance 5.8 4 °C/W (1) Ensured to average outgoing quality level (AOQL). (2) Typicals represent the most likely parametric norm. 6.5 Electrical Characteristics All typical limits apply over TJ = 25°C, and all maximum and minimum limits apply over the full operating temperature range (TJ = –40°C to +125°C). VIN = 12 V, VBOOST – VSW = 5 V unless otherwise specified. Data sheet minimum and maximum specification limits are ensured by design, test, or statistical analysis. PARAMETER TEST CONDITIONS MIN(1) TYP(2) MAX(1) UNIT VFB Feedback voltage 0.784 0.800 0.816 V ΔVFB/ΔVIN Feedback voltage line regulation VIN = 3 V to 20 V 0.02 %/V IFB Feedback input bias current Sink or source 0.1 100 nA UVLO Undervoltage lockout VIN Rising 2.7 2.9 V Undervoltage lockout VIN Falling 2 2.3 UVLO hysteresis 0.4 FSW Switching frequency LM2738X 1.28 1.6 1.92 MHz LM2738Y 0.364 0.55 0.676 DMAX Maximum duty cycle LM2738X , Load = 150 mA 92% LM2738Y, Load = 150 mA 95% DMIN Minimum duty cycle LM2738X 7.5% LM2738Y 2% RDS(ON) Switch ON resistance VBOOST – VSW = 3 V, Load = 400 mA 250 500 m Ω ICL Switch current limit VBOOST – VSW = 3 V, VIN = 3 V 2 2.9 A IQ Quiescent current Switching 1.9 3 mA Non-Switching 1.9 mA Quiescent current (shutdown) VEN = 0 V 400 nA IBOOST Boost pin current LM2738X (27% Duty Cycle) 4.5 mA LM2738Y (27% Duty Cycle) 2.5 VEN_TH Shutdown threshold voltage VEN Falling 0.4 V Enable threshold voltage VEN Rising 1.4 IEN Enable pin current Sink / Source 10 nA ISW Switch leakage VIN = 20 V 100 nA |
类似零件编号 - LM2738YSD |
|
类似说明 - LM2738YSD |
|
|
链接网址 |
隐私政策 |
ALLDATASHEETCN.COM |
ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |