sc2041is.tr Semtech Corporation, sc2041is.tr Datasheet

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sc2041is.tr

Manufacturer Part Number
sc2041is.tr
Description
Hotswitch? Usb Power Distribution Switch With Shutdown
Manufacturer
Semtech Corporation
Datasheet
1.SC2041IS.TR.pdf (14 pages)
July 18, 2000
DESCRIPTION
USB power distribution switches are high-side
N-channel MOSFET switches with built-in overcurrent
protection and low on-state resistance. The SC2041
switch is designed to meet the USB requirements for
power switching and maintenance-free fault protection
for self-powered & bus-powered hub applications. The
SC2041 features low on-state resistance to meet the
USB requirement for voltage drop and regulation. The
switch is controlled by a shutdown input that is
compatible with 3V and 5V logic. The device is active
when the shutdown input is low. See SC2051 for an
active high version. The device provides short circuit
current limiting at a value of less than 1.0A, well below
the USB limit of 5A. During an overcurrent condition the
device provides a fault notification to signal the USB
controller. An integrated thermal protection circuit
automatically shuts the switch off when the junction
temperature reaches its thermal limit. The switch
remains off until the junction temperature drops
approximately 20°C. The switch will continue to cycle
on and off until the fault is removed. Inrush current
limiting prevents voltage drop on an upstream port
when the switch is enabled. An undervoltage lockout
circuit guarantees the switch is initially off during
start-up.
TYPICAL APPLICATION CIRCUIT
© 2000 SEMTECH CORP.
Shutdown Signal From USB Controller
Flag Output To USB Controller
VBUS IN
R1
HotSwitch™ USB Power Distribution
Switch With Shutdown
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
C1
0.1uF
FEATURES
APPLICATIONS
ORDERING INFORMATION
SC2041IS.TR
Note:
(1) Only available in tape and reel packaging. A reel
contains 2500 devices.
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652 MITCHELL ROAD NEWBURY PARK CA 91320
Designed to meet USB specification revisions 1.1
and 2.0 power management requirements
500mA continuous load current
High-side MOSFET switch with low R
Short-circuit current protection
Internal thermal shutdown
Undervoltage lockout
Open drain fault output
Soft start circuit with slow turn-on time
Wide supply voltage range: 2.8V to 5.5V
2.5kV ESD rating (Human Body Model)
Full industrial temperature range
Universal Serial Bus (USB) power management
Self-powered or bus-powered USB hubs
Root hubs in desktop PCs & servers
Notebook PCs
Peripherals
1
2
3
4
U1
GND
IN
IN
SHDN
DEVICE
SC2041
OUT
OUT
OUT
FLG
(1)
8
7
6
5
C2
0.1uF
PACKAGE
SO-8
SC2041
C3
22uF
DS(ON)
VBUS OUT
1

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sc2041is.tr Summary of contents

Page 1

... Full industrial temperature range APPLICATIONS = Universal Serial Bus (USB) power management = Self-powered or bus-powered USB hubs = Root hubs in desktop PCs & servers = Notebook PCs = Peripherals ORDERING INFORMATION DEVICE SC2041IS.TR Note: (1) Only available in tape and reel packaging. A reel contains 2500 devices GND SHDN ...

Page 2

July 18, 2000 ABSOLUTE MAXIMUM RATINGS Parameter Input Voltage Range Output Voltage Range Shutdown Input Flag Output Continuous Output Current Thermal Impedance Junction to Ambient Thermal Impedance Junction to Case Operating Ambient Temperature Range Operating Junction Temperature Range Storage Temperature ...

Page 3

July 18, 2000 ELECTRICAL CHARACTERISTICS (Cont.) Unless specified 25° 5V SHDN Parameter Current Limit Short Circuit Current Limit Current Limit Trip Threshold SHDN High Level Input Voltage Low Level Input Voltage Input ...

Page 4

July 18, 2000 BLOCK DIAGRAM PIN CONFIGURATION Top View (8-Pin SOIC) PIN DESCRIPTION Pin # Pin Name Pin Function 1 GND Ground Input voltage: drain of N-channel power MOSFET. Connect to supply voltage. 4 SHDN Shutdown input: ...

Page 5

July 18, 2000 TYPICAL CHARACTERISTICS On-State Quiescent Current vs. Junction Temperature vs. Input Voltage 120 V = 5.0V IN 100 500mA OUT V = GND SHDN ...

Page 6

July 18, 2000 TYPICAL CHARACTERISTICS (Cont.) Short Circuit Current Limit vs. Input Voltage vs. Junction Temperature 0. SHDN GND 0.90 OUT 0.85 0.80 0.75 0.70 0.65 0.60 2.5 3.0 3.5 4.0 V (V) IN ...

Page 7

July 18, 2000 TYPICAL CHARACTERISTICS (Cont.) Figure 1: Output Turn On Delay and Rise Time with 0.1µF Output Capacitor and No Load Top Trace 5V/div. SHDN Bottom Trace 2V/div. OUT Timebase: 1ms/div 5V, R ...

Page 8

July 18, 2000 TYPICAL CHARACTERISTICS (Cont.) Figure 5: Current Limit and Trip Threshold With Ramped Load on Enabled Device Top Trace 5V/div. FLG Bottom Trace 0.5A/div. OUT Timebase: 100ms/div 5V, R ramping from open ...

Page 9

July 18, 2000 TYPICAL CHARACTERISTICS (Cont.) Figure 9: Inrush Current, Device Enabled Into 100µF and 10 Top Trace 5V/div. SHDN Bottom Trace 0.2A/div. OUT Timebase: 2.5ms/div 5V 100µF ...

Page 10

July 18, 2000 APPLICATIONS INFORMATION (Cont.) Component Selection - General A 0.1µF or greater ceramic bypass capacitor is recom- mended at the device input. This should be placed U1 1 GND 2 VBUS Shutdown Signal ...

Page 11

July 18, 2000 APPLICATIONS INFORMATION (Cont.) power planes) and P = 37.5mW, we calculate the D(MAX) worst-case 130 0 0375 . Thus it can be seen that this device does not ...

Page 12

July 18, 2000 TYPICAL APPLICATIONS CIRCUITS (Cont.) Bus-Powered Hub, Ganged-Port Power Management: A bus-powered hub distributes power and data from an input port to downstream ports. It must supply a contin- uous 100mA of current to each downstream port. A ...

Page 13

July 18, 2000 TYPICAL APPLICATIONS CIRCUITS (Cont.) High-Power or Low-Power Bus-Powered Function: Both low-power and high-power bus-powered functions must draw less than 100mA at startup. At this time, they must also present a load of less than the parallel combination ...

Page 14

July 18, 2000 OUTLINE DRAWING - SO-8 LAND PATTERN - SO-8 ECN00-1199 © 2000 SEMTECH CORP. HotSwitch™ USB Power Distribution Switch With Shutdown 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC2041 JEDEC REF: MS-012AA 14 ...

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