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MIC2072 PDF 데이터시트 ( Data , Function )

부품번호 MIC2072 기능
기능 USB Power Controller
제조업체 Micrel Semiconductor
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MIC2072 데이터시트, 핀배열, 회로
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, 반도체, 판매, 대치품
MIC2012
Absolute Maximum Ratings (Note 1, Note 4)
Supply Voltage (VIN, VMAIN, VAUX).....................–0.3V to 6V
EN1, EN2, S3# Input Pins .................................–0.3V to 6V
FAULT#, OUT1, OUT2 Output Pins...................–0.3V to 6V
FAULT Output Current................................................ 25mA
ESD Rating, Note 3 ...................................................... 2kV
Micrel
Operating Ratings (Note 2)
Supply Voltage (VMAIN, VAUX)...................... +4.5V to +5.5V
Ambient Temperature (TA) ............................ –0°C to +70°C
Junction Temperature (TJ) ........................ Internally Limited
Package Thermal Resistance
QSOP JA).......................................................................163°C/W
SOIC JA).........................................................................160°C/W
Electrical Characteristics
VMAIN = 5V; AUX = 5V; TA = 25°C; unless noted
Symbol
Parameter
Condition
VMAIN
IMAIN (ON)
MAIN Supply Voltage
MAIN Supply Current Switches On
Note 5
S3# = 1, no load
IMAIN (OFF)
MAIN Supply Current Switches Off S3# = 1, no load
Note 5, (MIC20x2-1, MIC20x2-2 only)
ILEAK
MAIN Reverse Leakage Current,
S3# = 0, both switches ON, VMAIN = 0V
VAUX
IAUX ON
IAUX OFF
VUV/AUX
VHYS
RDSMAIN
RDSAUX
ILIMIT(MAIN)
ILIMIT(AUX)
VTH
VHYS
IIN
IOFF
AUX Supply Voltage
AUX Supply Current,
both switches on, Note 5
AUX Supply Current, switches
off. (MIC20x2-1, MIC20x2-2 only)
AUX Undervoltage Lockout
Threshold
AUX Undervoltage Lockout
Hysteresis
MAIN On-Resistance, Each Output
AUX On-Resistance, Each Output
MAIN Current-Limit Threshold
MAIN Short-Circuit Current-Limit
AUXCurrent-Limit Threshold
AUX Short-Circuit Current-Limit
S3#, EN1, EN2. Input
Threshold Voltage
(EN1, EN2, for MIC20x2-x only)
No load
S3# = 0
No load
S3# = 0
VAUX increasing
VAUX decreasing
S3# = 1, IOUT = 500mA
S3# = 0, IOUT = 100mA
S3# = 1, VOUT = 4.0V, ramped load
VOUT = 0V
S3# = 0, VOUT = 4.0V, ramped load
VOUT = 0V, COUT = 100µF
High-to-Low transition
Low-to-High transition
EN1, EN2 and S3# Input Hysteresis
(EN1, EN2, for MIC20x2-x only)
S3#, EN1, EN2 Input Current
(EN1, EN2, for MIC20x2-x only)
OUT1, OUT2 Leakage Current
(MIC2012-x, MIC2072-x only)
Pull-Up Current During Latched
Output State (MIC2072-1, -2)
VS3/EN = 5V, 0V
Outputs are off, VOUT = 0
Outputs latched off
Min Typ Max Units
4.5 5.0 5.5
V
16 22 µA
5 µA
–10 +10 µA
4.5 5.0 5.5
V
0.6 1 mA
5 µA
3.1 4.0
2.9 3.8
V
V
200 mV
100 140 mΩ
500 700 mΩ
0.8 2.0 A
0.65 1.8 A
105 150 195 mA
80 mA
0.8 1.5
V
1.7 2.0
V
200 mV
–1 1 µA
–10 10 µA
1 mA
MIC2012/2072
4
January 2005

4페이지










MIC2072 전자부품, 판매, 대치품
MIC2012
Test Circuit
VOUT
Device
Under OUT
Test
IO U T
RL
CL
VO U T
tr
90%
10%
90%
10%
tf
Micrel
January 2005
7
MIC2012/2072

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