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PDF ( 数据手册 , 数据表 ) MIC2072

零件编号 MIC2072
描述 USB Power Controller
制造商 Micrel Semiconductor
LOGO Micrel Semiconductor LOGO 


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MIC2072 数据手册, 描述, 功能
MIC2012
MIC2012/MIC2072
USB Power Controller
Micrel
General Description
The MIC2012 is a dual channel USB power switch designed to
support the power distribution requirements for USB Wakeup
from the ACPI S3 state. The MIC2012 will directly switch its
two outputs between a 5V main supply and a 5V auxiliary
supply normally provided in ATX style power supplies.
The MIC2012 will adjust its current-limit threshold according
to the ACPI state it is in. In the normal active S0 state the cur-
rent-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 only 100mA per channel
to minimize the current that is supplied by the auxiliary supply
thereby ensuring that voltage regulation is maintained even
during fault conditions.
The MIC2012 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 MIC2072 option latches the output off upon detecting
an overcurrent condition for more than 5ms minimum. The
output can be reset by either toggling the EN inputs of the
MIC2072-1, -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
• UL Recognized Component
• 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 dur-
ing 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
• Latched thermal shutdown options with auto-reset
(MIC2072)
• Undervoltage lockout
Applications
• Desktop PCs
• Notebook PCs
• Notebook Docking stations
• LAN Servers
• PC Motherboards
Typical Application
ATX Power Supply
5V MAIN
5V STANDBY
S3 Control
82801AA or Equivalent
SLP S3#
SLP S5#
OC0
OC1
Overcurrent Port 1
Overcurrent Port 1
MIC2012P
MAIN OUT1
AUX OUT2
S3#
FAULT1#
FAULT2#
GND
100F
100F
VBUS
D+
D–
GND
VBUS
D+
D–
GND
Downstream
USB
Port 1
Downstream
USB
Port 2
Figure 1. USB Wakeup with Control Input
UL Recognized Component
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
January 2005
1
MIC2012/2072







MIC2072 pdf, 数据表
MIC2012
Typical Characteristics
Main Supply Current
vs. Temperature
(Main 1 and Main 2 = ON)
30
V = 4.5, 5.0, 5.5V
MAIN
25 EN1 = EN2 = [ON],V AUX = S3# = 5.0V
20 5.5V MAIN
15
4.5 V MAIN
5.0 V MAIN
10
5
IOUT = 0µA
0
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
Main Short-Circuit
Current-Limit Threshold
vs. Temperature
1.40
1.35
V = 5.0V
MAIN
V = S3# = 4.5, 5.0, 5.5V
AUX
1.30
5.5V AUX
1.25
1.20 5.0V AUX
4.5V AUX
1.15
1.10
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
AUX Supply Current
vs. Temperature
(AUX 1 and AUX 2 = OFF)
1.00
0.90
0.80
0.70
V AUX = 4.5, 5.0, 5.5V
V MAIN = S3# = 0V
IOUT = 0µA
EN1 = EN2 = [OFF]
0.60
0.50
0.40
0.30
0.20 5.5V AUX
0.10 5.0 V AUX
4.5 V AUX
0.00-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
Enable Threshold (increasing)
vs. Temperature
(MIC2012-1/-2)
2.2
2.0
1.8 4.5V MAIN
1.6
5.5V MAIN
5.0V MAIN
1.4 V MAIN = 4.5V to 5.5V
V AUX = S3# = 5.0V
1.2
-40 -20 0 20 40 60
TEMPERATURE (°C)
80 100
MIC2012/2072
0.25
0.225
0.2
Main Supply Current
vs. Temperature
(Main 1 and Main 2 = OFF)
V = 4.5, 5.0, 5.5V
MAIN
EN1 = EN2 = [OFF],V AUX = S3# = 5.0V
0.175 5.5V MAIN
0.15
5.0 V MAIN
0.125
0.1
0.075
0.05
4.5 V MAIN
0.025
IOUT = 0µA
0
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
2000
1800
1600
Main Rise-Time
vs. Temperature
(EN Toggled)
V = 5.0V
MAIN
V = S3# = 4.5, 5.0, 5.5V
AUX
4.5V AUX
1400
1200
1000
5.0 V AUX
800
600 5.5 V AUX
400
200
-40 -20 0 20
R L = 10Ω
C L = 1µF
40 60 80 100
TEMPERATURE (°C)
Enable Threshold (increasing)
vs. Temperature
(MIC2012-1/-2)
2.2
2.0 5.5V AUX
1.8
5.0 V AUX
1.6 4.5 V AUX
1.4 V AUX = 4.5, 5.0, 5.5V
V MAIN = S3# = 5.0V
1.2-40 -20 0 20 40 60
TEMPERATURE (°C)
80 100
Enable Threshold (decreasing)
vs. Temperature
(MIC2012-1/-2)
2.0
1.8 4.5V MAIN
1.6 5.0V MAIN
1.4 5.5V MAIN
1.2 V MAIN = 4.5V to 5.5V
V AUX = S3# = 5.0V
1.0
-40 -20 0 20 40
60
TEMPERATURE (°C)
80 100
8
Micrel
Main Short-Circuit Current-Limit
vs. Temperature
1.30
1.25
V = 5.0V
MAIN
V = S3# = 4.5, 5.0, 5.5V
AUX
1.20
1.15
5.5V AUX
1.10
5.0V AUX
1.05 4.5V AUX
1.00
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
1000
900
800
AUX Supply Current
vs. Temperature
(AUX 1 and AUX 2 = ON)
V AUX = 4.5, 5.0, 5.5V
V MAIN = S3# = 0V
5.5V AUX
700
600
500
400 4.5 V AUX
5.0 V AUX
300
200
100
-40
IOUT = 0µA
EN1 = EN2 = [ON]
-20 0 20 40 60 80
TEMPERATURE (°C)
100
Enable Threshold (decreasing)
vs. Temperature
(MIC2012-1/-2)
2.0
V AUX = 4.5, 5.0, 5.5V
1.8 V MAIN = S3# = 5.0V
1.6
1.4 4.5 V AUX
5.0 V AUX
1.2
5.5V AUX
1.0
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
1800
1600
1400
1200
Pull-Up Current
vs. Temperature
(Output Latched Off–MIC2072)
V MAIN = 5.0 V
V AUX = S3# = 4.5, 5.0, 5.5V
5.5V AUX
1000
800
600 5.0V AUX 4.5V AUX
400
200
-40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
January 2005







MIC2072 equivalent, schematic
MIC2012
Package Information
Micrel
16-Pin QSOP (QS)
8-Pin SOIC (M)
MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com
This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its use.
Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can
reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into
the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser's
use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser's own risk and Purchaser agrees to fully indemnify
Micrel for any damages resulting from such use or sale.
© 2004 Micrel Incorporated
MIC2012/2072
16
January 2005










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