MIC2010 Micrel Semiconductor, MIC2010 Datasheet

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MIC2010

Manufacturer Part Number
MIC2010
Description
USB Power Controller Advance Information
Manufacturer
Micrel Semiconductor
Datasheet
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 en-
sure 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 re-
duces power consumption during fault conditions.
Typical Application
September 2000
MIC2010
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
82801AA or Equivalent
ATX Power Supply
5V STANDBY
5V MAIN
SLP S3#
SLP S5#
OC0
OC1
Overcurrent Port 1
S3# CONTROL
Figure 1. USB Wakeup From ACPI S3 System Diagram
Overcurrent Port 1
ON/OFF 1
ON/OFF 2
MIC2010-1P/-2P
MAIN
AUX
EN1
EN2
S3#
FAULT1
FAULT1
GND
RSET1
RSET2
OUT1
OUT2
1
Features
• Compliant to USB power distribution specifications
• Two completely independent switches
• Integrated switching matrix supports ACPI S0/S3 state
• Make-before-break switching ensures glitch-free
• No back-feed of auxiliary supply onto main supply
• Bi-level current-limit preserves auxiliary supply voltage
• Thermally isolated channels
• Thermal shutdown protection
• Fault status outputs with filter prevents false assertions
• Circuit breaker options with auto-reset (MIC2070)
• Undervoltage lockout
Applications
• Desktop PCs
• Notebook PCs
• Notebook docking stations
• LAN Servers
• PC motherboard
transitions without external FET circuits
transitions
during standby mode
regulation in standby mode
during hot-plug events
100 F
100 F
MIC2010/MIC2070
USB Power Controller
Advance Information
GND
GND
V
V
BUS
D+
D–
BUS
D+
D–
Downstream
Downstream
Port 1
Port 2
USB
USB
MIC2010/2070
Micrel

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MIC2010 Summary of contents

Page 1

... 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. ...

Page 2

... MIC2010 Ordering Information Part Number Enable MIC2010-1CQS* Active High MIC2010-1PCQS* Active High MIC2010-2CQS* Active Low MIC2010-2PCQS Active Low MIC2070-1CQS Active High MIC2070-1PCQS* Active High MIC2070-2CQS* Active Low MIC2070-2PCQS* Active Low * Contact factory for availability. Pin Configuration MIC2010 Fault Circuit Breaker Output ...

Page 3

... FAULT2 is asserted LOW when channel thermal shutdown state or overcurrent condition for more than 5ms. MIC2070 latches this output in it's asserted state upon overcurrent condition. Toggling EN2 or removing load will reset the circuit breaker latch, and deassert FAULT2. 3 Micrel MIC2010/2070 ...

Page 4

... Reset Latch (MIC2070-x only), Note 7 Overtemperature Threshold V FAULT1, 2 Output Low Voltage OL FAULT1, 2 Output Off Current (Not Applicable for 'P' versions) MIC2010 Operating Ratings (Note 1, Note 4) Supply Voltage (V Continuous Output Current (AUX Mode) .. 50mA to 300mA Ambient Temperature (T Junction Temperature (T Package Thermal Resistance QSOP = 25 C ...

Page 5

... MIC2010 Symbol Parameter V FAULT1, 2 Output High Voltage OH (MIC2010-1P, 2P), (MIC2070-1P, 2P) T MAIN to S3# Hold Time, Note MAIN to S3# Set-up Time, Note FAULT Delay Filter Response Time DLY (Overcurrent only), Note 8 t Overcurrent Response Time OC t MAIN Output Turn-On Time ON(MAIN) ...

Page 6

... EN V OUT OUT V OUT I OUT FAULT# MAIN S3# MIC2010/2070 50 90% Figure 2. MIC2010/70-1 50 90% Figure 3. MIC2010/70-2 Output shorted to ground I LIMIT t OC Figure 4. Overcurrent Response Timing t H 1.5V Figure 5. MAIN to S3# Timing 6 t OFF 10% t OFF 10% t DLY t S 1.5V Micrel September 2000 ...

Page 7

... The MIC2010/2070 are designed to support the power distri- bution requirements for USB wakeup from the ACPI S3 state. It integrates two independent channels under control of input S3#. When S3# is asserted LOW (ACPI S3 state) the MIC2010/ 2070 will switch a 500m MOSFET switch from the AUX input to each of its two outputs ...

Page 8

... This helps to ensure that the power supply DLY voltage regulation is preserved and also prevents possible damage to sensitive components. is typically DLY Thermal Shutdown Figure 6. MIC2010 System Timing Figure 7. MIC2070 System Timing— Output Resets When Load is Removed 8 Overcurrent Fault Reached Overcurrent Fault Load Removed– ...

Page 9

... No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. September 2000 PIN 1 0.012 (0.30) 0.025 (0.635) BSC 0.008 (0.20) 0.0098 (0.249) 0.0075 (0.190) 0.196 (4.98) 0.189 (4.80) 16-Pin QSOP (QS (408) 944-0970 http://www.micrel.com FAX WEB © 2000 Micrel Incorporated 9 DIMENSIONS: INCHES (MM 0.050 (1.27) 0.016 (0.40) 0.2284 (5.801) 0.2240 (5.690) MIC2010/2070 Micrel ...

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