Datenblatt-Suchmaschine für elektronische Bauteile
  German  ▼
ALLDATASHEETDE.COM

X  

LM3525M-L Datenblatt(PDF) 8 Page - Texas Instruments

Click here to check the latest version.
Teilenummer LM3525M-L
Bauteilbeschribung  Single Port USB Power Switch and Over-Current Protection
Download  17 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Hersteller  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM3525M-L Datenblatt(HTML) 8 Page - Texas Instruments

Back Button LM3525M-L Datasheet HTML 4Page - Texas Instruments LM3525M-L Datasheet HTML 5Page - Texas Instruments LM3525M-L Datasheet HTML 6Page - Texas Instruments LM3525M-L Datasheet HTML 7Page - Texas Instruments LM3525M-L Datasheet HTML 8Page - Texas Instruments LM3525M-L Datasheet HTML 9Page - Texas Instruments LM3525M-L Datasheet HTML 10Page - Texas Instruments LM3525M-L Datasheet HTML 11Page - Texas Instruments LM3525M-L Datasheet HTML 12Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 17 page
background image
LM3525
SNVS051D – FEBRUARY 2000 – REVISED MARCH 2013
www.ti.com
Adequate capacitance must be connected to the input of the device to limit the input voltage drop during a hot-
plug event to less than 330 mV. For a few tens of µs, the host must supply the inrush current to the peripheral,
charging its bulk capacitance to Vbus. This current is initially supplied by the input capacitor. A 33 µF 16V
tantalum capacitor is recommended.
In choosing the capacitors, special attention must be paid to the Effective Series Resistance, ESR, of the
capacitors to minimize the IR drop across the capacitor's ESR.
SOFT START
To eliminate the upstream voltage droop caused by the high in-rush current drawn by the output capacitors, the
inrush current is internally limited to 1.0A.
TRANSIENT OVER-CURRENT DELAY
In USB applications, it is required that output bulk capacitance is utilized to support hot-plug events. During hot-
plug events, inrush currents may also cause the flag to go active. Since these conditions are not valid over-
current faults, the USB controller must ignore the flag during these events.
High transient current is also generated when switch is enabled and large values of capacitance at the output
have to be rapidly charged. The inrush currents created could exceed the short circuit current limit threshold of
the device forcing it into the current limit mode. The capacitor is charged with the maximum available short circuit
current set by the LM3525. The duration of the inrush current depends on the size of the output capacitance and
load current. Since this is not a valid fault condition, the LM3525 delays the generation of the fault flag for 1 ms.
If condition persists due to other causes such as a short, a fault flag is generated after a 1 ms delay has elapsed.
The LM3525's 1 ms delay in issuing the fault flag is adequate for most applications. If longer delays are required,
an RC filter as shown in Figure 14 may be used.
Figure 14. Transient Fitter
PCB LAYOUT CONSIDERATIONS
In order to meet the USB requirements for voltage drop, droop and EMI, each component used in this circuit
must be evaluated for its contribution to the circuit performance as shown in Figure 15. The PCB layout rules and
guidelines must be followed.
Place the switch as close to the USB connector as possible. Keep all Vbus traces as short as possible and use
at least 50-mil, 1 ounce copper for all Vbus traces. Solder plating the traces will reduce the trace resistance.
Avoid vias as much as possible. If vias are used, use multiple vias in parallel and/or make them as large as
possible.
Place the output capacitor and ferrite beads as close to the USB connector as possible.
If ferrite beads are used, use wires with minimum resistance and large solder pads to minimize connection
resistance.
8
Submit Documentation Feedback
Copyright © 2000–2013, Texas Instruments Incorporated
Product Folder Links: LM3525


Ähnliche Teilenummer - LM3525M-L

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
National Semiconductor ...
LM3525M-L NSC-LM3525M-L Datasheet
243Kb / 10P
   Single Port USB Power Switch and Over-Current Protection
More results

Ähnliche Beschreibung - LM3525M-L

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
National Semiconductor ...
LM3525 NSC-LM3525 Datasheet
243Kb / 10P
   Single Port USB Power Switch and Over-Current Protection
LM3526 NSC-LM3526 Datasheet
323Kb / 11P
   Dual Port USB Power Switch and Over-Current Protection
logo
Texas Instruments
LM3526MX-H TI1-LM3526MX-H Datasheet
1Mb / 18P
[Old version datasheet]   LM3526 Dual Port USB Power Switch and Over-Current Protection
logo
National Semiconductor ...
LM3543 NSC-LM3543 Datasheet
316Kb / 12P
   Triple Port USB Power Distribution Switch and Over-Current Protection
LM3544 NSC-LM3544 Datasheet
349Kb / 13P
   Quad Port USB Power Distribution Switch and Over-Current Protection
logo
Unisonic Technologies
US3026A UTC-US3026A Datasheet
161Kb / 11P
   DUAL-CHANNEL USB POWER SWITCH AND OVER-CURRENT PROTECTION
US2026A UTC-US2026A Datasheet
224Kb / 11P
   DUAL-CHANNEL USB POWER SWITCH AND OVER-CURRENT PROTECTION
logo
Protek Devices
PA3526 PROTEC-PA3526 Datasheet
235Kb / 3P
   Dual USB Power Control Switch with Over-Current/Voltage Protection
logo
Microchip Technology
UCS2112 MICROCHIP-UCS2112 Datasheet
930Kb / 64P
   USB Dual-Port Power Switch and Current Monitor
07/14/15
UCS2113 MICROCHIP-UCS2113 Datasheet
900Kb / 62P
   USB Dual-Port Power Switch and Current Monitor
Rev A December 2016
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17


Datenblatt Download

Go To PDF Page


Link URL




Privatsphäre und Datenschutz
ALLDATASHEETDE.COM
War ALLDATASHEET hilfreich?  [ DONATE ] 

Über Alldatasheet   |   Werbung   |   Kontakt   |   Privatsphäre und Datenschutz   |   Linktausch   |   Hersteller
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
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