LM3526-L NSC [National Semiconductor], LM3526-L Datasheet
LM3526-L
Related parts for LM3526-L
LM3526-L Summary of contents
Page 1
... Universal Serial Bus (USB) Root Hubs including Desktop and Notebook PC n USB Monitor Hubs n Other Self-Powered USB Hub Devices n High Power USB Devices Requiring In-rush Limiting n General Purpose High Side Switch Applications DS101097-1 DS101097 February 2000 DS101097-2 LM3526-H DS101097-28 LM3526-L www.national.com ...
Page 2
... Ordering Information Part Number LM3526M-H Active High Enable, 95 units per rail LM3526M-L Active Low Enable, 95 units per rail LM3526MX-H Active High Enable, 2500 units per reel LM3526MX-L Active Low Enable, 2500 units per reel www.national.com Enable, Delivery Option 2 Package Type SO-8, NS Package ...
Page 3
... A given in the Absolute Maximum Ratings, which ever is lower. Note 3: The human body model is a 100 pF capacitor discharged through a 1.5 k Note 4: Thermal Shutdown will protect the device from permanent damage. Note 5: For LM3526-L, OFF is EN 2.4V and Operating Ratings (Note 1) Supply Voltage Range ...
Page 4
... Turn off Delay OUT OFF t Over Current Flag Delay OC Pin Description Pin Number Pin Name 1, 4 ENA, ENB Enable (Input): Logic-compatible enable inputs. (LM3526-L) ENA, ENB (LM3526- FLAG A Fault Flag (Output): Active-low, open-drain outputs. Indicates overcurrent, UVLO or thermal FLAG B shutdown. 6 GND Ground ...
Page 5
Typical Performance Characteristics R vs Temperature ON Quiescent Current vs Input Voltage Current Limit vs Output Voltage = 5.0V 500 mA Temperature ON DS101097-4 Quiescent Current vs Temperature DS101097-6 OC Threshold vs ...
Page 6
Typical Performance Characteristics specified. (Continued) Fault Flag Delay vs Temperature Under Voltage Lockout (UVLO) Over Current/Current Limit Response * Output is shorted to Ground through a 100 m www.national.com = 5.0V 500 mA Fault ...
Page 7
Typical Performance Characteristics specified. (Continued) Turn-ON/OFF Response with 47 /10µF Load Thermal Shutdown Response (Port A output shorted * ) * Port A is shorted to GND through a 100 m resistor Enable into a short = 5.0V ...
Page 8
... Functional Description The LM3526-H and LM3526-L are high side P-Channel switches with active-high and active-low enable inputs, re- spectively. Fault conditions turn-off and inhibit turn-on of the output transistor and activate the open-drain error flag tran- sistor sinking current to the ground. INPUT AND OUTPUT IN (Input) is the power supply connection to the control cir- cuitry and the source of the output MOSFET ...
Page 9
Application Information 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. The PCB layout rules and guidelines ...
Page 10
Typical Applications FIGURE 4. Soft-Start Application (Single port shown) www.national.com FIGURE 3. Dual-Port USB Self-Powered Hub FIGURE 5. In-rush Current-limit Application 10 DS101097-25 DS101097-26 DS101097-27 ...
Page 11
Physical Dimensions LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. ...