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PDF MIC2010 Data sheet ( Hoja de datos )
| Número de pieza | MIC2010 | |
| Descripción | USB Power Controller | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MIC2010 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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MIC2010/2070
MIC2010/MIC2070
USB Power Controller
Micrel
General Description
The MIC2010 is a dual channel USB power switch designed
to support the power distribution requirements for USB
Wakeup from the ACPI S3 state. The MIC2010 will directly
switch its two outputs between a 5V main supply and a
5V auxiliary supply normally provided in ATX style power
supplies.
The MIC2010 will adjust its current-limit threshold according
to the ACPI state it is in. In the normal active ACPI S0 state
the current-limit is set at 500mA minimum per channel
satisfying the USB continuous output current specification.
In the S3 state the current-limit can be reduced to a value
determined by an external resistor to minimize the current
that is supplied by the auxiliary supply, thereby ensuring that
voltage regulation is maintained even during fault conditions.
The MIC2010 provides make-before-break switching to
ensure glitch-free transitions between the S3 and S0 states.
Each channel is also thermally isolated from the other so that
a fault in one channel does not effect the other. FAULT status
output signals are also provided indicating overcurrent and
thermal shutdown conditions.
The MIC2070 option latches the output off upon detecting an
overcurrent condition lasting for more than 5ms minimum.
The output can be reset by either toggling the EN inputs of the
MIC2070-1/-2 or by removing the load. Latching the output
off provides a circuit breaker mode of operation which
reduces power consumption during fault conditions.
Features
• Compliant to USB power distribution specifications
• Two completely independent switches
• Integrated switching matrix supports ACPI S0/S3 state
transitions without external FET circuits
• Make-before-break switching ensures glitch-free
transitions
• No back-feed of auxiliary supply onto main supply
during standby mode
• Bi-level current-limit preserves auxiliary supply voltage
regulation in standby mode
• Thermally isolated channels
• Thermal shutdown protection
• Fault status outputs with filter prevents false assertions
during hot-plug events
• Circuit breaker options with auto-reset (MIC2070)
• Undervoltage lockout
• UL File #179633
Applications
• Desktop PCs
• Notebook PCs
• Notebook docking stations
• LAN Servers
• PC motherboard
Typical Application
ATX Power Supply
5V MAIN
5V STANDBY
ON/OFF 1
ON/OFF 2
S3# CONTROL
82801AA or Equivalent
SLP S3#
SLP S5#
OC0
OC1
Overcurrent Port 1
Overcurrent Port 1
MIC2010-1P/-2P
MAIN
AUX
OUT1
EN1 OUT2
EN2
S3# RSET1
FAULT1
FAULT1 RSET2
GND
100µF
100µF
VBUS
D+
D–
GND
VBUS
D+
D–
GND
Figure 1. USB Wakeup From ACPI S3 System Diagram
Downstream
USB
Port 1
Downstream
USB
Port 2
UL Recognized Component
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
January 2005 1 M9999-101104
1 page  
MIC2010/2070
Micrel
Symbol
VOH
TH
TS
tDLY
tOC
tON(MAIN)
tOFF(MAIN)
tr(MAIN)
tf(MAIN)
tON(AUX)
tOFF(AUX)
tr(AUX)
tf(AUX)
tXMA
tXAM
Parameter
Condition
FAULT1, 2 Output High Voltage
IFAULT = –20µA
(MIC2010-1P, 2P), (MIC2070-1P, 2P)
MAIN to S3# Hold Time, Note 7
Figure 5
MAIN to S3# Set-up Time, Note 7 Figure 5
FAULT Delay Filter Response Time Output shorted to ground, Figure 4
(Overcurrent only), Note 8
Overcurrent Response Time
Output shorted to ground, Figure 4
MAIN output
AUX output
MAIN Output Turn-On Time
MAIN Output Turn-Off Time
MAIN Output Rise Time
MAIN Output Fall Time
AUX Output Turn-On Time
AUX Output Turn-Off Time
AUX Output Rise Time
AUX Output Fall Time
MAIN to AUX
Cross Conduction Time, Note 9
RL = 10Ω, CL = 1µF, Figure 3
RL = 10Ω, CL = 1µF, Figure 3
RL = 10Ω, CL = 1µF, Figure 3
RL = 10Ω, CL = 1µF, Figure 3
RL = 50Ω, CL = 1µF, Figure 3
RL = 50Ω, CL = 1µF, Figure 3
RL = 50Ω, CL = 1µF, Figure 3
RL = 50Ω, CL = 1µF, Figure 3
S3# transition to 0
AUX to MAIN
Cross Conduction Time, Note 9
S3# transition to 1
Min Typ Max Units
4V
5 ms
0 ms
5 10 20 ms
2 µs
2 µs
2 ms
35 µs
2 ms
32 µs
0.6 ms
120 µs
0.5 ms
115 µs
5 7.5 ms
5 7.5 ms
Notes:
1.
2.
3.
4.
5.
6.
7.
8.
9.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
All voltages are referenced to ground.
For MIC2070-1(P) OFF occurs when VEN < 0.8V and ON occurs when VEN > 2.4V. For MIC2070-2(P) OFF occurs when VEN > 2.4V and ON
occurs when VEN < 0.8V.
Current-limit threshold is defined by the current-limit factor divided by RSET.
Guaranteed by design. Not production tested.
Assumes only one channel in current-limit. Delay circuitry is shared among channels so it is possible for tDLY to be 40ms max if one channel
enters current-limit as the other is about to time-out.
Cross conduction time is the duration in which both MAIN and AUX internal switches are on subsequent to S3# transitioning.
Test Circuit
Device
Under OUT
Test
IOUT
RL
CL
VOUT
Timing Diagram
VOUT
tr
90%
10%
90%
10%
tf
January 2005 5 M9999-101104
5 Page 
MIC2010/2070
AUX Ramped to Short by MOSFET
VAUX = 5V
VMAIN = S3# = 0V, EN = [ON]
RLOAD toggles from >1kΩ to <0.5Ω
CLOAD = 1µF
TIME (25ms/div)
AUX Turn-On into Short
VAUX =5V
VMAIN = S3# = 0V
EN toggles from [OFF] to [ON]
CLOAD = 100µF
TIME (2.5ms/div)
AUX Inrush Current into Small CLOAD
VAUX =5V
VMAIN = S3# = 0V
EN toggles from [OFF] to [ON]
ILOAD < 10mA
CLOAD = 10µF
TIME (100µs/div)
Main Turn-On into Short
Micrel
1.2A
VMAIN = VAUX =5V
S3# = 5V
EN toggles from [OFF] to [ON]
RLOAD = Short
CLOAD = 1µF
TIME (2.5ms/div)
AUX Inrush Current into Large CLOAD
230mA
VAUX =5V
VMAIN = S3#= 0V
EN toggles from [OFF] to [ON]
ILOAD < 10mA
CLOAD = 220µF
TIME (2.5ms/div)
Main-to-AUX Cross Conduction
VMAIN = VAUX = 5V
S3# toggles from [HI] to [LO]
EN = [ON]
RLOAD = 50Ω
CLOAD = 1µF
950µs
TIME (250µs/div)
January 2005 11 M9999-101104
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet MIC2010.PDF ] | |
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