MIC2012CM Micrel Inc, MIC2012CM Datasheet

IC USB PWR CTRLR DUAL 8-SOIC

MIC2012CM

Manufacturer Part Number
MIC2012CM
Description
IC USB PWR CTRLR DUAL 8-SOIC
Manufacturer
Micrel Inc
Datasheet

Specifications of MIC2012CM

Controller Type
USB Power Controller
Interface
USB
Voltage - Supply
4.5 V ~ 5.5 V
Current - Supply
1mA
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Input Voltage
5V
On State Resistance
0.1ohm
Thermal Protection
Yes
No. Of Outputs
2
Internal Switch
Yes
Distribution Switch Case Style
SOIC
No. Of Pins
8
Current Limit
1.8A
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

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MICREL
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MIC2012CM
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20 000
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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 specifi cation. 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.
Typical Application
UL Recognized Component
January 2005
MIC2012
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
82801AA or Equivalent
ATX Power Supply
5V STANDBY
5V MAIN
SLP S3#
SLP S5#
OC0
OC1
Overcurrent Port 1
Overcurrent Port 1
S3 Control
Figure 1. USB Wakeup with Control Input
MAIN
AUX
S3#
FAULT1#
FAULT2#
MIC2012P
GND
OUT1
OUT2
1
Features
• Compliant to USB power distribution specifi cations
• UL Recognized Component
• 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 dur-
• Bi-level current-limit preserves auxiliary supply voltage
• Thermally isolated channels
• Thermal shutdown protection
• Fault status outputs with fi lter prevents false assertions
• Latched thermal shutdown options with auto-reset
• Undervoltage lockout
Applications
• Desktop PCs
• Notebook PCs
• Notebook Docking stations
• LAN Servers
• PC Motherboards
transitions without external FET circuits
transitions
ing standby mode
regulation in standby mode
during hot-plug events
(MIC2072)
100F
100F
MIC2012/MIC2072
USB Power Controller
GND
GND
V
V
BUS
D+
D–
BUS
D+
D–
Downstream
Downstream
Port 1
Port 2
USB
USB
MIC2012/2072
Micrel

Related parts for MIC2012CM

MIC2012CM Summary of contents

Page 1

MIC2012 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 ...

Page 2

... MIC2012 Ordering Information Part Number Standard Pb-Free (1) (1) MIC2012BM MIC2012YM MIC2012CM MIC2012ZM MIC2012PCM MIC2012PZM MIC2012-1PCQS MIC2012-1PZQS MIC2012-2PCQS MIC2012-2PZQS MIC2072-1PCQS MIC2072-2PZQS MIC2072-2PCQS MIC2072-2PZQS Note: 1. Contact factory for availablity Pin Confi guration FAULT1 1 S3# 2 AUX 3 GND 4 8-Pin SOIC (M) MIC2012/2072 Enable Fault Output ...

Page 3

MIC2012 Pin Description Pin Number Pin Number Pin Name (MIC2012) (MIC2012- 13 January ...

Page 4

MIC2012 Absolute Maximum Ratings Supply Voltage ( .....................–0. IN, MAIN, AUX EN1, EN2, S3# Input Pins .................................–0. FAULT#, OUT1, OUT2 Output Pins ...................–0. FAULT Output Current ................................................ 25mA ESD Rating, Note ...

Page 5

MIC2012 Symbol Parameter V Latch Reset Threshold TH LATCH (MIC2072, MIC2072-x only) Minimum Output Slew Rate to Reset Latch (MIC2072, MIC2072-x only), Note 6 Overtemperature Threshold V FAULT Output Low Voltage OL V FAULT Output High Voltage OH (MIC2012-1P,-2P),(MIC2072-1P,-2P) FAULT ...

Page 6

MIC2012 Timing Diagrams OUT OUT V OUT I OUT FAULT# MAIN S3# MIC2012/2072 50 90% Figure 2. MIC2012/72-1 50 90% ...

Page 7

MIC2012 Test Circuit V OUT January 2005 V OUT I Device OUT Under OUT Test 90% 90% 10% 10% 7 Micrel t f MIC2012/2072 ...

Page 8

MIC2012 Typical Characteristics Main Supply Current vs. Temperature (Main 1 and Main 4.5, 5.0, 5.5V MAIN EN1 = EN2 = [ON],V = S3# = 5.0V 25 AUX 5.5V MAIN 20 15 5.0 V MAIN ...

Page 9

MIC2012 Output Reset Threshold vs. Temperature 3.00 (Output Latched Off –MIC2072) V Rising OUT 2. 5.0 V MAIN V = S3# = 4.5, 5.0, 5.5V AUX 2.50 5.5V AUX 2.25 2.00 5.0V 1.75 AUX 4.5V AUX 1.50 -40 ...

Page 10

MIC2012 Functional Characteristics AUX Start-up by UVLO V ramps from AUX MAIN MAIN EN = [ON LOAD LOAD TIME (500s/div) Main Start-up by ...

Page 11

MIC2012 AUX Turn-On Response V EN toggles from [OFF] to [ON] TIME (100s/div) Turn-On from S3# to AUX V AUX S3# toggles from [HI] to [LOW] TIME (100s/div) Main Inrush Current into toggles from [OFF] to [ON] ...

Page 12

MIC2012 AUX Ramped to Short by MOSFET AUX V = S3 [ON] MAIN RL toggles from >1k to <0.5 OAD LOAD TIME (25ms/div) AUX Turn-On into Short V EN toggles ...

Page 13

MIC2012 January 2005 AUX-to-Main Cross Conduction =5V MAIN AUX S3# toggles from [LO] to [HI [ON LOAD LOAD 3.96ms TIME (1ms/div) 13 Micrel MIC2012/2072 ...

Page 14

MIC2012 Functional Diagram EN S3# *MIC2070-1/2 Only Functional Description The MIC2012/2072 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# ...

Page 15

MIC2012 dead short on the output. Fault Status Output The FAULT signal is an active-low output with an open-drain or weak pull-up confi guration. FAULT is asserted (active-low) when either an overcurrent or thermal shutdown condition occurs. In the case ...

Page 16

... MIC2012 Package Information MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL 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 specifi cations at any time without notifi cation to the customer. ...

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